[llvm-commits] [llvm] r153307 - in /llvm/trunk: ./ autoconf/ docs/ include/llvm/Config/ lib/Target/ lib/Target/CBackend/ lib/Target/CBackend/TargetInfo/ projects/sample/ projects/sample/autoconf/ tools/bugpoint/ utils/ utils/lit/lit/ExampleTests/LL...

Joe Abbey jabbey at arxan.com
Fri Mar 23 10:07:13 PDT 2012


Actually there's a little bit of remorsing on our side.  We've been experimenting with the CBackend and have been trying to build a product around it.

I guess I missed the thread which doomed the CBackend to SVN deletion.

Was it dropped due to a lack of maintainers?

What was the impact on other targets and the LLVM arch since this is more of a raising to HLL rather than a lowering to ASM?

Just curious, I'm cc'ing our internal stakeholders in the event they have any commentary.

Joe

Sent from my iPhone

On Mar 23, 2012, at 12:42 PM, Jim Grosbach <grosbach at apple.com> wrote:

> And there was much rejoicing.
>
> On Mar 22, 2012, at 10:50 PM, Eric Christopher wrote:
>
>> Author: echristo
>> Date: Fri Mar 23 00:50:46 2012
>> New Revision: 153307
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=153307&view=rev
>> Log:
>> Remove the C backend.
>>
>> Removed:
>>   llvm/trunk/lib/Target/CBackend/CBackend.cpp
>>   llvm/trunk/lib/Target/CBackend/CMakeLists.txt
>>   llvm/trunk/lib/Target/CBackend/CTargetMachine.h
>>   llvm/trunk/lib/Target/CBackend/LLVMBuild.txt
>>   llvm/trunk/lib/Target/CBackend/Makefile
>>   llvm/trunk/lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp
>>   llvm/trunk/lib/Target/CBackend/TargetInfo/CMakeLists.txt
>>   llvm/trunk/lib/Target/CBackend/TargetInfo/LLVMBuild.txt
>>   llvm/trunk/lib/Target/CBackend/TargetInfo/Makefile
>> Modified:
>>   llvm/trunk/CMakeLists.txt
>>   llvm/trunk/autoconf/configure.ac
>>   llvm/trunk/configure
>>   llvm/trunk/docs/ExtendingLLVM.html
>>   llvm/trunk/docs/GettingStarted.html
>>   llvm/trunk/include/llvm/Config/config.h.in
>>   llvm/trunk/lib/Target/LLVMBuild.txt
>>   llvm/trunk/projects/sample/autoconf/configure.ac
>>   llvm/trunk/projects/sample/configure
>>   llvm/trunk/tools/bugpoint/ExecutionDriver.cpp
>>   llvm/trunk/tools/bugpoint/ToolRunner.cpp
>>   llvm/trunk/utils/GenLibDeps.pl
>>   llvm/trunk/utils/lit/lit/ExampleTests/LLVM.InTree/test/site.exp
>>   llvm/trunk/utils/lit/lit/ExampleTests/LLVM.OutOfTree/obj/test/site.exp
>>
>> Modified: llvm/trunk/CMakeLists.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/CMakeLists.txt?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/CMakeLists.txt (original)
>> +++ llvm/trunk/CMakeLists.txt Fri Mar 23 00:50:46 2012
>> @@ -72,7 +72,6 @@
>>
>> set(LLVM_ALL_TARGETS
>>  ARM
>> -  CBackend
>>  CellSPU
>>  CppBackend
>>  Hexagon
>>
>> Modified: llvm/trunk/autoconf/configure.ac
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/autoconf/configure.ac?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/autoconf/configure.ac (original)
>> +++ llvm/trunk/autoconf/configure.ac Fri Mar 23 00:50:46 2012
>> @@ -632,7 +632,7 @@
>>  enableval=host
>> fi
>> case "$enableval" in
>> -  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 CBackend CppBackend MBlaze PTX Hexagon" ;;
>> +  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 CppBackend MBlaze PTX Hexagon" ;;
>>  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
>>      case "$a_target" in
>>        x86)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
>> @@ -645,7 +645,6 @@
>>        spu)      TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
>>        xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
>>        msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
>> -        cbe)      TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;;
>>        cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
>>        hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
>>        mblaze)   TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
>> @@ -723,21 +722,6 @@
>> AC_SUBST(LLVM_ENUM_ASM_PARSERS)
>> AC_SUBST(LLVM_ENUM_DISASSEMBLERS)
>>
>> -dnl Prevent the CBackend from using printf("%a") for floating point so older
>> -dnl C compilers that cannot deal with the 0x0p+0 hex floating point format
>> -dnl can still compile the CBE's output
>> -AC_ARG_ENABLE([cbe-printf-a],AS_HELP_STRING([--enable-cbe-printf-a],
>> -  [Enable C Backend output with hex floating point via %a  (default is YES)]),,
>> -  enableval=default)
>> -case "$enableval" in
>> -  yes) AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
>> -  no)  AC_SUBST(ENABLE_CBE_PRINTF_A,[0]) ;;
>> -  default)  AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
>> -  *) AC_MSG_ERROR([Invalid setting for --enable-cbe-printf-a. Use "yes" or "no"]) ;;
>> -esac
>> -AC_DEFINE_UNQUOTED([ENABLE_CBE_PRINTF_A],$ENABLE_CBE_PRINTF_A,
>> -                   [Define if CBE is enabled for printf %a output])
>> -
>> dnl Override the option to use for optimized builds.
>> AC_ARG_WITH(optimize-option,
>>  AS_HELP_STRING([--with-optimize-option],
>>
>> Modified: llvm/trunk/configure
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/configure?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/configure (original)
>> +++ llvm/trunk/configure Fri Mar 23 00:50:46 2012
>> @@ -705,7 +705,6 @@
>> LLVM_ENUM_ASM_PRINTERS
>> LLVM_ENUM_ASM_PARSERS
>> LLVM_ENUM_DISASSEMBLERS
>> -ENABLE_CBE_PRINTF_A
>> OPTIMIZE_OPTION
>> EXTRA_OPTIONS
>> EXTRA_LD_OPTIONS
>> @@ -1422,8 +1421,6 @@
>>                          target1,target2,... Valid targets are: host, x86,
>>                          x86_64, sparc, powerpc, arm, mips, spu, hexagon,
>>                          xcore, msp430, ptx, cbe, and cpp (default=all)
>> -  --enable-cbe-printf-a   Enable C Backend output with hex floating point via
>> -                          %a (default is YES)
>>  --enable-bindings       Build specific language bindings:
>>                          all,auto,none,{binding-name} (default=auto)
>>  --enable-libffi         Check for the presence of libffi (default is NO)
>> @@ -5310,7 +5307,7 @@
>>  enableval=host
>> fi
>> case "$enableval" in
>> -  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 CBackend CppBackend MBlaze PTX Hexagon" ;;
>> +  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 CppBackend MBlaze PTX Hexagon" ;;
>>  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
>>      case "$a_target" in
>>        x86)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
>> @@ -5323,7 +5320,6 @@
>>        spu)      TARGETS_TO_BUILD="CellSPU $TARGETS_TO_BUILD" ;;
>>        xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
>>        msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
>> -        cbe)      TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;;
>>        cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
>>        hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
>>        mblaze)   TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
>> @@ -5420,30 +5416,6 @@
>>
>>
>>
>> -# Check whether --enable-cbe-printf-a was given.
>> -if test "${enable_cbe_printf_a+set}" = set; then
>> -  enableval=$enable_cbe_printf_a;
>> -else
>> -  enableval=default
>> -fi
>> -
>> -case "$enableval" in
>> -  yes) ENABLE_CBE_PRINTF_A=1
>> - ;;
>> -  no)  ENABLE_CBE_PRINTF_A=0
>> - ;;
>> -  default)  ENABLE_CBE_PRINTF_A=1
>> - ;;
>> -  *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-cbe-printf-a. Use \"yes\" or \"no\"" >&5
>> -echo "$as_me: error: Invalid setting for --enable-cbe-printf-a. Use \"yes\" or \"no\"" >&2;}
>> -   { (exit 1); exit 1; }; } ;;
>> -esac
>> -
>> -cat >>confdefs.h <<_ACEOF
>> -#define ENABLE_CBE_PRINTF_A $ENABLE_CBE_PRINTF_A
>> -_ACEOF
>> -
>> -
>>
>> # Check whether --with-optimize-option was given.
>> if test "${with_optimize_option+set}" = set; then
>> @@ -10402,7 +10374,7 @@
>>  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
>>  lt_status=$lt_dlunknown
>>  cat > conftest.$ac_ext <<EOF
>> -#line 10405 "configure"
>> +#line 10377 "configure"
>> #include "confdefs.h"
>>
>> #if HAVE_DLFCN_H
>> @@ -13686,7 +13658,6 @@
>>        /* | [A-Za-z]:[\\/]*) INTEL_JITEVENTS_INCDIR=$withval/include
>>                                  INTEL_JITEVENTS_LIBDIR=$withval/$llvm_intel_jitevents_archdir ;;
>>        *) ;;
>> -
>>      esac
>>
>>
>> @@ -22186,7 +22157,6 @@
>> LLVM_ENUM_ASM_PRINTERS!$LLVM_ENUM_ASM_PRINTERS$ac_delim
>> LLVM_ENUM_ASM_PARSERS!$LLVM_ENUM_ASM_PARSERS$ac_delim
>> LLVM_ENUM_DISASSEMBLERS!$LLVM_ENUM_DISASSEMBLERS$ac_delim
>> -ENABLE_CBE_PRINTF_A!$ENABLE_CBE_PRINTF_A$ac_delim
>> OPTIMIZE_OPTION!$OPTIMIZE_OPTION$ac_delim
>> EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
>> EXTRA_LD_OPTIONS!$EXTRA_LD_OPTIONS$ac_delim
>> @@ -22275,7 +22245,7 @@
>> LTLIBOBJS!$LTLIBOBJS$ac_delim
>> _ACEOF
>>
>> -  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 93; then
>> +  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 92; then
>>    break
>>  elif $ac_last_try; then
>>    { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
>>
>> Modified: llvm/trunk/docs/ExtendingLLVM.html
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/ExtendingLLVM.html?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/docs/ExtendingLLVM.html (original)
>> +++ llvm/trunk/docs/ExtendingLLVM.html Fri Mar 23 00:50:46 2012
>> @@ -105,19 +105,6 @@
>> support for it.  Generally you must do the following steps:</p>
>>
>> <dl>
>> -<dt>Add support to the C backend in <tt>lib/Target/CBackend/</tt></dt>
>> -
>> -<dd>Depending on the intrinsic, there are a few ways to implement this.  For
>> -    most intrinsics, it makes sense to add code to lower your intrinsic in
>> -    <tt>LowerIntrinsicCall</tt> in <tt>lib/CodeGen/IntrinsicLowering.cpp</tt>.
>> -    Second, if it makes sense to lower the intrinsic to an expanded sequence of
>> -    C code in all cases, just emit the expansion in <tt>visitCallInst</tt> in
>> -    <tt>Writer.cpp</tt>.  If the intrinsic has some way to express it with GCC
>> -    (or any other compiler) extensions, it can be conditionally supported based
>> -    on the compiler compiling the CBE output (see <tt>llvm.prefetch</tt> for an
>> -    example).  Third, if the intrinsic really has no way to be lowered, just
>> -    have the code generator emit code that prints an error message and calls
>> -    abort if executed.</dd>
>>
>> <dt>Add support to the .td file for the target(s) of your choice in
>>   <tt>lib/Target/*/*.td</tt>.</dt>
>>
>> Modified: llvm/trunk/docs/GettingStarted.html
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/GettingStarted.html?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/docs/GettingStarted.html (original)
>> +++ llvm/trunk/docs/GettingStarted.html Fri Mar 23 00:50:46 2012
>> @@ -1389,7 +1389,7 @@
>>  <dd> This directory contains files that describe various target architectures
>>  for code generation.  For example, the <tt>llvm/lib/Target/X86</tt>
>>  directory holds the X86 machine description while
>> -  <tt>llvm/lib/Target/CBackend</tt> implements the LLVM-to-C converter.</dd>
>> +  <tt>llvm/lib/Target/ARM</tt> implements the ARM backend.</dd>
>>
>>  <dt><tt><b>llvm/lib/CodeGen/</b></tt></dt>
>>  <dd> This directory contains the major parts of the code generator: Instruction
>>
>> Modified: llvm/trunk/include/llvm/Config/config.h.in
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Config/config.h.in?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/Config/config.h.in (original)
>> +++ llvm/trunk/include/llvm/Config/config.h.in Fri Mar 23 00:50:46 2012
>> @@ -12,9 +12,6 @@
>> /* Directories clang will search for headers */
>> #undef C_INCLUDE_DIRS
>>
>> -/* Define if CBE is enabled for printf %a output */
>> -#undef ENABLE_CBE_PRINTF_A
>> -
>> /* Define if position independent code is enabled */
>> #undef ENABLE_PIC
>>
>>
>> Removed: llvm/trunk/lib/Target/CBackend/CBackend.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/CBackend.cpp?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/CBackend.cpp (original)
>> +++ llvm/trunk/lib/Target/CBackend/CBackend.cpp (removed)
>> @@ -1,3616 +0,0 @@
>> -//===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
>> -//
>> -//                     The LLVM Compiler Infrastructure
>> -//
>> -// This file is distributed under the University of Illinois Open Source
>> -// License. See LICENSE.TXT for details.
>> -//
>> -//===----------------------------------------------------------------------===//
>> -//
>> -// This library converts LLVM code to C code, compilable by GCC and other C
>> -// compilers.
>> -//
>> -//===----------------------------------------------------------------------===//
>> -
>> -#include "CTargetMachine.h"
>> -#include "llvm/CallingConv.h"
>> -#include "llvm/Constants.h"
>> -#include "llvm/DerivedTypes.h"
>> -#include "llvm/Module.h"
>> -#include "llvm/Instructions.h"
>> -#include "llvm/Pass.h"
>> -#include "llvm/PassManager.h"
>> -#include "llvm/Intrinsics.h"
>> -#include "llvm/IntrinsicInst.h"
>> -#include "llvm/InlineAsm.h"
>> -#include "llvm/ADT/StringExtras.h"
>> -#include "llvm/ADT/SmallString.h"
>> -#include "llvm/ADT/STLExtras.h"
>> -#include "llvm/Analysis/ConstantsScanner.h"
>> -#include "llvm/Analysis/FindUsedTypes.h"
>> -#include "llvm/Analysis/LoopInfo.h"
>> -#include "llvm/Analysis/ValueTracking.h"
>> -#include "llvm/CodeGen/Passes.h"
>> -#include "llvm/CodeGen/IntrinsicLowering.h"
>> -#include "llvm/Target/Mangler.h"
>> -#include "llvm/Transforms/Scalar.h"
>> -#include "llvm/MC/MCAsmInfo.h"
>> -#include "llvm/MC/MCContext.h"
>> -#include "llvm/MC/MCInstrInfo.h"
>> -#include "llvm/MC/MCObjectFileInfo.h"
>> -#include "llvm/MC/MCRegisterInfo.h"
>> -#include "llvm/MC/MCSubtargetInfo.h"
>> -#include "llvm/MC/MCSymbol.h"
>> -#include "llvm/Target/TargetData.h"
>> -#include "llvm/Support/CallSite.h"
>> -#include "llvm/Support/CFG.h"
>> -#include "llvm/Support/ErrorHandling.h"
>> -#include "llvm/Support/FormattedStream.h"
>> -#include "llvm/Support/GetElementPtrTypeIterator.h"
>> -#include "llvm/Support/InstVisitor.h"
>> -#include "llvm/Support/MathExtras.h"
>> -#include "llvm/Support/TargetRegistry.h"
>> -#include "llvm/Support/Host.h"
>> -#include "llvm/Config/config.h"
>> -#include <algorithm>
>> -// Some ms header decided to define setjmp as _setjmp, undo this for this file.
>> -#ifdef _MSC_VER
>> -#undef setjmp
>> -#endif
>> -using namespace llvm;
>> -
>> -extern "C" void LLVMInitializeCBackendTarget() {
>> -  // Register the target.
>> -  RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
>> -}
>> -
>> -namespace {
>> -  class CBEMCAsmInfo : public MCAsmInfo {
>> -  public:
>> -    CBEMCAsmInfo() {
>> -      GlobalPrefix = "";
>> -      PrivateGlobalPrefix = "";
>> -    }
>> -  };
>> -
>> -  /// CWriter - This class is the main chunk of code that converts an LLVM
>> -  /// module to a C translation unit.
>> -  class CWriter : public FunctionPass, public InstVisitor<CWriter> {
>> -    formatted_raw_ostream &Out;
>> -    IntrinsicLowering *IL;
>> -    Mangler *Mang;
>> -    LoopInfo *LI;
>> -    const Module *TheModule;
>> -    const MCAsmInfo* TAsm;
>> -    const MCRegisterInfo *MRI;
>> -    const MCObjectFileInfo *MOFI;
>> -    MCContext *TCtx;
>> -    const TargetData* TD;
>> -
>> -    std::map<const ConstantFP *, unsigned> FPConstantMap;
>> -    std::set<Function*> intrinsicPrototypesAlreadyGenerated;
>> -    std::set<const Argument*> ByValParams;
>> -    unsigned FPCounter;
>> -    unsigned OpaqueCounter;
>> -    DenseMap<const Value*, unsigned> AnonValueNumbers;
>> -    unsigned NextAnonValueNumber;
>> -
>> -    /// UnnamedStructIDs - This contains a unique ID for each struct that is
>> -    /// either anonymous or has no name.
>> -    DenseMap<StructType*, unsigned> UnnamedStructIDs;
>> -
>> -  public:
>> -    static char ID;
>> -    explicit CWriter(formatted_raw_ostream &o)
>> -      : FunctionPass(ID), Out(o), IL(0), Mang(0), LI(0),
>> -        TheModule(0), TAsm(0), MRI(0), MOFI(0), TCtx(0), TD(0),
>> -        OpaqueCounter(0), NextAnonValueNumber(0) {
>> -      initializeLoopInfoPass(*PassRegistry::getPassRegistry());
>> -      FPCounter = 0;
>> -    }
>> -
>> -    virtual const char *getPassName() const { return "C backend"; }
>> -
>> -    void getAnalysisUsage(AnalysisUsage &AU) const {
>> -      AU.addRequired<LoopInfo>();
>> -      AU.setPreservesAll();
>> -    }
>> -
>> -    virtual bool doInitialization(Module &M);
>> -
>> -    bool runOnFunction(Function &F) {
>> -     // Do not codegen any 'available_externally' functions at all, they have
>> -     // definitions outside the translation unit.
>> -     if (F.hasAvailableExternallyLinkage())
>> -       return false;
>> -
>> -      LI = &getAnalysis<LoopInfo>();
>> -
>> -      // Get rid of intrinsics we can't handle.
>> -      lowerIntrinsics(F);
>> -
>> -      // Output all floating point constants that cannot be printed accurately.
>> -      printFloatingPointConstants(F);
>> -
>> -      printFunction(F);
>> -      return false;
>> -    }
>> -
>> -    virtual bool doFinalization(Module &M) {
>> -      // Free memory...
>> -      delete IL;
>> -      delete TD;
>> -      delete Mang;
>> -      delete TCtx;
>> -      delete TAsm;
>> -      delete MRI;
>> -      delete MOFI;
>> -      FPConstantMap.clear();
>> -      ByValParams.clear();
>> -      intrinsicPrototypesAlreadyGenerated.clear();
>> -      UnnamedStructIDs.clear();
>> -      return false;
>> -    }
>> -
>> -    raw_ostream &printType(raw_ostream &Out, Type *Ty,
>> -                           bool isSigned = false,
>> -                           const std::string &VariableName = "",
>> -                           bool IgnoreName = false,
>> -                           const AttrListPtr &PAL = AttrListPtr());
>> -    raw_ostream &printSimpleType(raw_ostream &Out, Type *Ty,
>> -                                 bool isSigned,
>> -                                 const std::string &NameSoFar = "");
>> -
>> -    void printStructReturnPointerFunctionType(raw_ostream &Out,
>> -                                              const AttrListPtr &PAL,
>> -                                              PointerType *Ty);
>> -
>> -    std::string getStructName(StructType *ST);
>> -
>> -    /// writeOperandDeref - Print the result of dereferencing the specified
>> -    /// operand with '*'.  This is equivalent to printing '*' then using
>> -    /// writeOperand, but avoids excess syntax in some cases.
>> -    void writeOperandDeref(Value *Operand) {
>> -      if (isAddressExposed(Operand)) {
>> -        // Already something with an address exposed.
>> -        writeOperandInternal(Operand);
>> -      } else {
>> -        Out << "*(";
>> -        writeOperand(Operand);
>> -        Out << ")";
>> -      }
>> -    }
>> -
>> -    void writeOperand(Value *Operand, bool Static = false);
>> -    void writeInstComputationInline(Instruction &I);
>> -    void writeOperandInternal(Value *Operand, bool Static = false);
>> -    void writeOperandWithCast(Value* Operand, unsigned Opcode);
>> -    void writeOperandWithCast(Value* Operand, const ICmpInst &I);
>> -    bool writeInstructionCast(const Instruction &I);
>> -
>> -    void writeMemoryAccess(Value *Operand, Type *OperandType,
>> -                           bool IsVolatile, unsigned Alignment);
>> -
>> -  private :
>> -    std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
>> -
>> -    void lowerIntrinsics(Function &F);
>> -    /// Prints the definition of the intrinsic function F. Supports the
>> -    /// intrinsics which need to be explicitly defined in the CBackend.
>> -    void printIntrinsicDefinition(const Function &F, raw_ostream &Out);
>> -
>> -    void printModuleTypes();
>> -    void printContainedStructs(Type *Ty, SmallPtrSet<Type *, 16> &);
>> -    void printFloatingPointConstants(Function &F);
>> -    void printFloatingPointConstants(const Constant *C);
>> -    void printFunctionSignature(const Function *F, bool Prototype);
>> -
>> -    void printFunction(Function &);
>> -    void printBasicBlock(BasicBlock *BB);
>> -    void printLoop(Loop *L);
>> -
>> -    void printCast(unsigned opcode, Type *SrcTy, Type *DstTy);
>> -    void printConstant(Constant *CPV, bool Static);
>> -    void printConstantWithCast(Constant *CPV, unsigned Opcode);
>> -    bool printConstExprCast(const ConstantExpr *CE, bool Static);
>> -    void printConstantArray(ConstantArray *CPA, bool Static);
>> -    void printConstantVector(ConstantVector *CV, bool Static);
>> -    void printConstantDataSequential(ConstantDataSequential *CDS, bool Static);
>> -
>> -
>> -    /// isAddressExposed - Return true if the specified value's name needs to
>> -    /// have its address taken in order to get a C value of the correct type.
>> -    /// This happens for global variables, byval parameters, and direct allocas.
>> -    bool isAddressExposed(const Value *V) const {
>> -      if (const Argument *A = dyn_cast<Argument>(V))
>> -        return ByValParams.count(A);
>> -      return isa<GlobalVariable>(V) || isDirectAlloca(V);
>> -    }
>> -
>> -    // isInlinableInst - Attempt to inline instructions into their uses to build
>> -    // trees as much as possible.  To do this, we have to consistently decide
>> -    // what is acceptable to inline, so that variable declarations don't get
>> -    // printed and an extra copy of the expr is not emitted.
>> -    //
>> -    static bool isInlinableInst(const Instruction &I) {
>> -      // Always inline cmp instructions, even if they are shared by multiple
>> -      // expressions.  GCC generates horrible code if we don't.
>> -      if (isa<CmpInst>(I))
>> -        return true;
>> -
>> -      // Must be an expression, must be used exactly once.  If it is dead, we
>> -      // emit it inline where it would go.
>> -      if (I.getType() == Type::getVoidTy(I.getContext()) || !I.hasOneUse() ||
>> -          isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
>> -          isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
>> -          isa<InsertValueInst>(I))
>> -        // Don't inline a load across a store or other bad things!
>> -        return false;
>> -
>> -      // Must not be used in inline asm, extractelement, or shufflevector.
>> -      if (I.hasOneUse()) {
>> -        const Instruction &User = cast<Instruction>(*I.use_back());
>> -        if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
>> -            isa<ShuffleVectorInst>(User))
>> -          return false;
>> -      }
>> -
>> -      // Only inline instruction it if it's use is in the same BB as the inst.
>> -      return I.getParent() == cast<Instruction>(I.use_back())->getParent();
>> -    }
>> -
>> -    // isDirectAlloca - Define fixed sized allocas in the entry block as direct
>> -    // variables which are accessed with the & operator.  This causes GCC to
>> -    // generate significantly better code than to emit alloca calls directly.
>> -    //
>> -    static const AllocaInst *isDirectAlloca(const Value *V) {
>> -      const AllocaInst *AI = dyn_cast<AllocaInst>(V);
>> -      if (!AI) return 0;
>> -      if (AI->isArrayAllocation())
>> -        return 0;   // FIXME: we can also inline fixed size array allocas!
>> -      if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
>> -        return 0;
>> -      return AI;
>> -    }
>> -
>> -    // isInlineAsm - Check if the instruction is a call to an inline asm chunk.
>> -    static bool isInlineAsm(const Instruction& I) {
>> -      if (const CallInst *CI = dyn_cast<CallInst>(&I))
>> -        return isa<InlineAsm>(CI->getCalledValue());
>> -      return false;
>> -    }
>> -
>> -    // Instruction visitation functions
>> -    friend class InstVisitor<CWriter>;
>> -
>> -    void visitReturnInst(ReturnInst &I);
>> -    void visitBranchInst(BranchInst &I);
>> -    void visitSwitchInst(SwitchInst &I);
>> -    void visitIndirectBrInst(IndirectBrInst &I);
>> -    void visitInvokeInst(InvokeInst &I) {
>> -      llvm_unreachable("Lowerinvoke pass didn't work!");
>> -    }
>> -    void visitResumeInst(ResumeInst &I) {
>> -      llvm_unreachable("DwarfEHPrepare pass didn't work!");
>> -    }
>> -    void visitUnreachableInst(UnreachableInst &I);
>> -
>> -    void visitPHINode(PHINode &I);
>> -    void visitBinaryOperator(Instruction &I);
>> -    void visitICmpInst(ICmpInst &I);
>> -    void visitFCmpInst(FCmpInst &I);
>> -
>> -    void visitCastInst (CastInst &I);
>> -    void visitSelectInst(SelectInst &I);
>> -    void visitCallInst (CallInst &I);
>> -    void visitInlineAsm(CallInst &I);
>> -    bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
>> -
>> -    void visitAllocaInst(AllocaInst &I);
>> -    void visitLoadInst  (LoadInst   &I);
>> -    void visitStoreInst (StoreInst  &I);
>> -    void visitGetElementPtrInst(GetElementPtrInst &I);
>> -    void visitVAArgInst (VAArgInst &I);
>> -
>> -    void visitInsertElementInst(InsertElementInst &I);
>> -    void visitExtractElementInst(ExtractElementInst &I);
>> -    void visitShuffleVectorInst(ShuffleVectorInst &SVI);
>> -
>> -    void visitInsertValueInst(InsertValueInst &I);
>> -    void visitExtractValueInst(ExtractValueInst &I);
>> -
>> -    void visitInstruction(Instruction &I) {
>> -#ifndef NDEBUG
>> -      errs() << "C Writer does not know about " << I;
>> -#endif
>> -      llvm_unreachable(0);
>> -    }
>> -
>> -    void outputLValue(Instruction *I) {
>> -      Out << "  " << GetValueName(I) << " = ";
>> -    }
>> -
>> -    bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
>> -    void printPHICopiesForSuccessor(BasicBlock *CurBlock,
>> -                                    BasicBlock *Successor, unsigned Indent);
>> -    void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
>> -                            unsigned Indent);
>> -    void printGEPExpression(Value *Ptr, gep_type_iterator I,
>> -                            gep_type_iterator E, bool Static);
>> -
>> -    std::string GetValueName(const Value *Operand);
>> -  };
>> -}
>> -
>> -char CWriter::ID = 0;
>> -
>> -
>> -
>> -static std::string CBEMangle(const std::string &S) {
>> -  std::string Result;
>> -
>> -  for (unsigned i = 0, e = S.size(); i != e; ++i)
>> -    if (isalnum(S[i]) || S[i] == '_') {
>> -      Result += S[i];
>> -    } else {
>> -      Result += '_';
>> -      Result += 'A'+(S[i]&15);
>> -      Result += 'A'+((S[i]>>4)&15);
>> -      Result += '_';
>> -    }
>> -  return Result;
>> -}
>> -
>> -std::string CWriter::getStructName(StructType *ST) {
>> -  if (!ST->isLiteral() && !ST->getName().empty())
>> -    return CBEMangle("l_"+ST->getName().str());
>> -
>> -  return "l_unnamed_" + utostr(UnnamedStructIDs[ST]);
>> -}
>> -
>> -
>> -/// printStructReturnPointerFunctionType - This is like printType for a struct
>> -/// return type, except, instead of printing the type as void (*)(Struct*, ...)
>> -/// print it as "Struct (*)(...)", for struct return functions.
>> -void CWriter::printStructReturnPointerFunctionType(raw_ostream &Out,
>> -                                                   const AttrListPtr &PAL,
>> -                                                   PointerType *TheTy) {
>> -  FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
>> -  std::string tstr;
>> -  raw_string_ostream FunctionInnards(tstr);
>> -  FunctionInnards << " (*) (";
>> -  bool PrintedType = false;
>> -
>> -  FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
>> -  Type *RetTy = cast<PointerType>(*I)->getElementType();
>> -  unsigned Idx = 1;
>> -  for (++I, ++Idx; I != E; ++I, ++Idx) {
>> -    if (PrintedType)
>> -      FunctionInnards << ", ";
>> -    Type *ArgTy = *I;
>> -    if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
>> -      assert(ArgTy->isPointerTy());
>> -      ArgTy = cast<PointerType>(ArgTy)->getElementType();
>> -    }
>> -    printType(FunctionInnards, ArgTy,
>> -        /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
>> -    PrintedType = true;
>> -  }
>> -  if (FTy->isVarArg()) {
>> -    if (!PrintedType)
>> -      FunctionInnards << " int"; //dummy argument for empty vararg functs
>> -    FunctionInnards << ", ...";
>> -  } else if (!PrintedType) {
>> -    FunctionInnards << "void";
>> -  }
>> -  FunctionInnards << ')';
>> -  printType(Out, RetTy,
>> -      /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
>> -}
>> -
>> -raw_ostream &
>> -CWriter::printSimpleType(raw_ostream &Out, Type *Ty, bool isSigned,
>> -                         const std::string &NameSoFar) {
>> -  assert((Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) &&
>> -         "Invalid type for printSimpleType");
>> -  switch (Ty->getTypeID()) {
>> -  case Type::VoidTyID:   return Out << "void " << NameSoFar;
>> -  case Type::IntegerTyID: {
>> -    unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
>> -    if (NumBits == 1)
>> -      return Out << "bool " << NameSoFar;
>> -    else if (NumBits <= 8)
>> -      return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
>> -    else if (NumBits <= 16)
>> -      return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
>> -    else if (NumBits <= 32)
>> -      return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
>> -    else if (NumBits <= 64)
>> -      return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
>> -    else {
>> -      assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
>> -      return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
>> -    }
>> -  }
>> -  case Type::FloatTyID:  return Out << "float "   << NameSoFar;
>> -  case Type::DoubleTyID: return Out << "double "  << NameSoFar;
>> -  // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
>> -  // present matches host 'long double'.
>> -  case Type::X86_FP80TyID:
>> -  case Type::PPC_FP128TyID:
>> -  case Type::FP128TyID:  return Out << "long double " << NameSoFar;
>> -
>> -  case Type::X86_MMXTyID:
>> -    return printSimpleType(Out, Type::getInt32Ty(Ty->getContext()), isSigned,
>> -                     " __attribute__((vector_size(64))) " + NameSoFar);
>> -
>> -  case Type::VectorTyID: {
>> -    VectorType *VTy = cast<VectorType>(Ty);
>> -    return printSimpleType(Out, VTy->getElementType(), isSigned,
>> -                     " __attribute__((vector_size(" +
>> -                     utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
>> -  }
>> -
>> -  default:
>> -#ifndef NDEBUG
>> -    errs() << "Unknown primitive type: " << *Ty << "\n";
>> -#endif
>> -    llvm_unreachable(0);
>> -  }
>> -}
>> -
>> -// Pass the Type* and the variable name and this prints out the variable
>> -// declaration.
>> -//
>> -raw_ostream &CWriter::printType(raw_ostream &Out, Type *Ty,
>> -                                bool isSigned, const std::string &NameSoFar,
>> -                                bool IgnoreName, const AttrListPtr &PAL) {
>> -  if (Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) {
>> -    printSimpleType(Out, Ty, isSigned, NameSoFar);
>> -    return Out;
>> -  }
>> -
>> -  switch (Ty->getTypeID()) {
>> -  case Type::FunctionTyID: {
>> -    FunctionType *FTy = cast<FunctionType>(Ty);
>> -    std::string tstr;
>> -    raw_string_ostream FunctionInnards(tstr);
>> -    FunctionInnards << " (" << NameSoFar << ") (";
>> -    unsigned Idx = 1;
>> -    for (FunctionType::param_iterator I = FTy->param_begin(),
>> -           E = FTy->param_end(); I != E; ++I) {
>> -      Type *ArgTy = *I;
>> -      if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
>> -        assert(ArgTy->isPointerTy());
>> -        ArgTy = cast<PointerType>(ArgTy)->getElementType();
>> -      }
>> -      if (I != FTy->param_begin())
>> -        FunctionInnards << ", ";
>> -      printType(FunctionInnards, ArgTy,
>> -        /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
>> -      ++Idx;
>> -    }
>> -    if (FTy->isVarArg()) {
>> -      if (!FTy->getNumParams())
>> -        FunctionInnards << " int"; //dummy argument for empty vaarg functs
>> -      FunctionInnards << ", ...";
>> -    } else if (!FTy->getNumParams()) {
>> -      FunctionInnards << "void";
>> -    }
>> -    FunctionInnards << ')';
>> -    printType(Out, FTy->getReturnType(),
>> -      /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
>> -    return Out;
>> -  }
>> -  case Type::StructTyID: {
>> -    StructType *STy = cast<StructType>(Ty);
>> -
>> -    // Check to see if the type is named.
>> -    if (!IgnoreName)
>> -      return Out << getStructName(STy) << ' ' << NameSoFar;
>> -
>> -    Out << NameSoFar + " {\n";
>> -    unsigned Idx = 0;
>> -    for (StructType::element_iterator I = STy->element_begin(),
>> -           E = STy->element_end(); I != E; ++I) {
>> -      Out << "  ";
>> -      printType(Out, *I, false, "field" + utostr(Idx++));
>> -      Out << ";\n";
>> -    }
>> -    Out << '}';
>> -    if (STy->isPacked())
>> -      Out << " __attribute__ ((packed))";
>> -    return Out;
>> -  }
>> -
>> -  case Type::PointerTyID: {
>> -    PointerType *PTy = cast<PointerType>(Ty);
>> -    std::string ptrName = "*" + NameSoFar;
>> -
>> -    if (PTy->getElementType()->isArrayTy() ||
>> -        PTy->getElementType()->isVectorTy())
>> -      ptrName = "(" + ptrName + ")";
>> -
>> -    if (!PAL.isEmpty())
>> -      // Must be a function ptr cast!
>> -      return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
>> -    return printType(Out, PTy->getElementType(), false, ptrName);
>> -  }
>> -
>> -  case Type::ArrayTyID: {
>> -    ArrayType *ATy = cast<ArrayType>(Ty);
>> -    unsigned NumElements = ATy->getNumElements();
>> -    if (NumElements == 0) NumElements = 1;
>> -    // Arrays are wrapped in structs to allow them to have normal
>> -    // value semantics (avoiding the array "decay").
>> -    Out << NameSoFar << " { ";
>> -    printType(Out, ATy->getElementType(), false,
>> -              "array[" + utostr(NumElements) + "]");
>> -    return Out << "; }";
>> -  }
>> -
>> -  default:
>> -    llvm_unreachable("Unhandled case in getTypeProps!");
>> -  }
>> -}
>> -
>> -void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
>> -  Out << "{ ";
>> -  printConstant(cast<Constant>(CPA->getOperand(0)), Static);
>> -  for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
>> -    Out << ", ";
>> -    printConstant(cast<Constant>(CPA->getOperand(i)), Static);
>> -  }
>> -  Out << " }";
>> -}
>> -
>> -void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
>> -  Out << "{ ";
>> -  printConstant(cast<Constant>(CP->getOperand(0)), Static);
>> -  for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
>> -    Out << ", ";
>> -    printConstant(cast<Constant>(CP->getOperand(i)), Static);
>> -  }
>> -  Out << " }";
>> -}
>> -
>> -void CWriter::printConstantDataSequential(ConstantDataSequential *CDS,
>> -                                          bool Static) {
>> -  // As a special case, print the array as a string if it is an array of
>> -  // ubytes or an array of sbytes with positive values.
>> -  //
>> -  if (CDS->isCString()) {
>> -    Out << '\"';
>> -    // Keep track of whether the last number was a hexadecimal escape.
>> -    bool LastWasHex = false;
>> -
>> -    StringRef Bytes = CDS->getAsCString();
>> -
>> -    // Do not include the last character, which we know is null
>> -    for (unsigned i = 0, e = Bytes.size(); i != e; ++i) {
>> -      unsigned char C = Bytes[i];
>> -
>> -      // Print it out literally if it is a printable character.  The only thing
>> -      // to be careful about is when the last letter output was a hex escape
>> -      // code, in which case we have to be careful not to print out hex digits
>> -      // explicitly (the C compiler thinks it is a continuation of the previous
>> -      // character, sheesh...)
>> -      //
>> -      if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
>> -        LastWasHex = false;
>> -        if (C == '"' || C == '\\')
>> -          Out << "\\" << (char)C;
>> -        else
>> -          Out << (char)C;
>> -      } else {
>> -        LastWasHex = false;
>> -        switch (C) {
>> -          case '\n': Out << "\\n"; break;
>> -          case '\t': Out << "\\t"; break;
>> -          case '\r': Out << "\\r"; break;
>> -          case '\v': Out << "\\v"; break;
>> -          case '\a': Out << "\\a"; break;
>> -          case '\"': Out << "\\\""; break;
>> -          case '\'': Out << "\\\'"; break;
>> -          default:
>> -            Out << "\\x";
>> -            Out << (char)(( C/16  < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
>> -            Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
>> -            LastWasHex = true;
>> -            break;
>> -        }
>> -      }
>> -    }
>> -    Out << '\"';
>> -  } else {
>> -    Out << "{ ";
>> -    printConstant(CDS->getElementAsConstant(0), Static);
>> -    for (unsigned i = 1, e = CDS->getNumElements(); i != e; ++i) {
>> -      Out << ", ";
>> -      printConstant(CDS->getElementAsConstant(i), Static);
>> -    }
>> -    Out << " }";
>> -  }
>> -}
>> -
>> -
>> -// isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
>> -// textually as a double (rather than as a reference to a stack-allocated
>> -// variable). We decide this by converting CFP to a string and back into a
>> -// double, and then checking whether the conversion results in a bit-equal
>> -// double to the original value of CFP. This depends on us and the target C
>> -// compiler agreeing on the conversion process (which is pretty likely since we
>> -// only deal in IEEE FP).
>> -//
>> -static bool isFPCSafeToPrint(const ConstantFP *CFP) {
>> -  bool ignored;
>> -  // Do long doubles in hex for now.
>> -  if (CFP->getType() != Type::getFloatTy(CFP->getContext()) &&
>> -      CFP->getType() != Type::getDoubleTy(CFP->getContext()))
>> -    return false;
>> -  APFloat APF = APFloat(CFP->getValueAPF());  // copy
>> -  if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
>> -    APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
>> -#if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
>> -  char Buffer[100];
>> -  sprintf(Buffer, "%a", APF.convertToDouble());
>> -  if (!strncmp(Buffer, "0x", 2) ||
>> -      !strncmp(Buffer, "-0x", 3) ||
>> -      !strncmp(Buffer, "+0x", 3))
>> -    return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
>> -  return false;
>> -#else
>> -  std::string StrVal = ftostr(APF);
>> -
>> -  while (StrVal[0] == ' ')
>> -    StrVal.erase(StrVal.begin());
>> -
>> -  // Check to make sure that the stringized number is not some string like "Inf"
>> -  // or NaN.  Check that the string matches the "[-+]?[0-9]" regex.
>> -  if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
>> -      ((StrVal[0] == '-' || StrVal[0] == '+') &&
>> -       (StrVal[1] >= '0' && StrVal[1] <= '9')))
>> -    // Reparse stringized version!
>> -    return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
>> -  return false;
>> -#endif
>> -}
>> -
>> -/// Print out the casting for a cast operation. This does the double casting
>> -/// necessary for conversion to the destination type, if necessary.
>> -/// @brief Print a cast
>> -void CWriter::printCast(unsigned opc, Type *SrcTy, Type *DstTy) {
>> -  // Print the destination type cast
>> -  switch (opc) {
>> -    case Instruction::UIToFP:
>> -    case Instruction::SIToFP:
>> -    case Instruction::IntToPtr:
>> -    case Instruction::Trunc:
>> -    case Instruction::BitCast:
>> -    case Instruction::FPExt:
>> -    case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
>> -      Out << '(';
>> -      printType(Out, DstTy);
>> -      Out << ')';
>> -      break;
>> -    case Instruction::ZExt:
>> -    case Instruction::PtrToInt:
>> -    case Instruction::FPToUI: // For these, make sure we get an unsigned dest
>> -      Out << '(';
>> -      printSimpleType(Out, DstTy, false);
>> -      Out << ')';
>> -      break;
>> -    case Instruction::SExt:
>> -    case Instruction::FPToSI: // For these, make sure we get a signed dest
>> -      Out << '(';
>> -      printSimpleType(Out, DstTy, true);
>> -      Out << ')';
>> -      break;
>> -    default:
>> -      llvm_unreachable("Invalid cast opcode");
>> -  }
>> -
>> -  // Print the source type cast
>> -  switch (opc) {
>> -    case Instruction::UIToFP:
>> -    case Instruction::ZExt:
>> -      Out << '(';
>> -      printSimpleType(Out, SrcTy, false);
>> -      Out << ')';
>> -      break;
>> -    case Instruction::SIToFP:
>> -    case Instruction::SExt:
>> -      Out << '(';
>> -      printSimpleType(Out, SrcTy, true);
>> -      Out << ')';
>> -      break;
>> -    case Instruction::IntToPtr:
>> -    case Instruction::PtrToInt:
>> -      // Avoid "cast to pointer from integer of different size" warnings
>> -      Out << "(unsigned long)";
>> -      break;
>> -    case Instruction::Trunc:
>> -    case Instruction::BitCast:
>> -    case Instruction::FPExt:
>> -    case Instruction::FPTrunc:
>> -    case Instruction::FPToSI:
>> -    case Instruction::FPToUI:
>> -      break; // These don't need a source cast.
>> -    default:
>> -      llvm_unreachable("Invalid cast opcode");
>> -  }
>> -}
>> -
>> -// printConstant - The LLVM Constant to C Constant converter.
>> -void CWriter::printConstant(Constant *CPV, bool Static) {
>> -  if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
>> -    switch (CE->getOpcode()) {
>> -    case Instruction::Trunc:
>> -    case Instruction::ZExt:
>> -    case Instruction::SExt:
>> -    case Instruction::FPTrunc:
>> -    case Instruction::FPExt:
>> -    case Instruction::UIToFP:
>> -    case Instruction::SIToFP:
>> -    case Instruction::FPToUI:
>> -    case Instruction::FPToSI:
>> -    case Instruction::PtrToInt:
>> -    case Instruction::IntToPtr:
>> -    case Instruction::BitCast:
>> -      Out << "(";
>> -      printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
>> -      if (CE->getOpcode() == Instruction::SExt &&
>> -          CE->getOperand(0)->getType() == Type::getInt1Ty(CPV->getContext())) {
>> -        // Make sure we really sext from bool here by subtracting from 0
>> -        Out << "0-";
>> -      }
>> -      printConstant(CE->getOperand(0), Static);
>> -      if (CE->getType() == Type::getInt1Ty(CPV->getContext()) &&
>> -          (CE->getOpcode() == Instruction::Trunc ||
>> -           CE->getOpcode() == Instruction::FPToUI ||
>> -           CE->getOpcode() == Instruction::FPToSI ||
>> -           CE->getOpcode() == Instruction::PtrToInt)) {
>> -        // Make sure we really truncate to bool here by anding with 1
>> -        Out << "&1u";
>> -      }
>> -      Out << ')';
>> -      return;
>> -
>> -    case Instruction::GetElementPtr:
>> -      Out << "(";
>> -      printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
>> -                         gep_type_end(CPV), Static);
>> -      Out << ")";
>> -      return;
>> -    case Instruction::Select:
>> -      Out << '(';
>> -      printConstant(CE->getOperand(0), Static);
>> -      Out << '?';
>> -      printConstant(CE->getOperand(1), Static);
>> -      Out << ':';
>> -      printConstant(CE->getOperand(2), Static);
>> -      Out << ')';
>> -      return;
>> -    case Instruction::Add:
>> -    case Instruction::FAdd:
>> -    case Instruction::Sub:
>> -    case Instruction::FSub:
>> -    case Instruction::Mul:
>> -    case Instruction::FMul:
>> -    case Instruction::SDiv:
>> -    case Instruction::UDiv:
>> -    case Instruction::FDiv:
>> -    case Instruction::URem:
>> -    case Instruction::SRem:
>> -    case Instruction::FRem:
>> -    case Instruction::And:
>> -    case Instruction::Or:
>> -    case Instruction::Xor:
>> -    case Instruction::ICmp:
>> -    case Instruction::Shl:
>> -    case Instruction::LShr:
>> -    case Instruction::AShr:
>> -    {
>> -      Out << '(';
>> -      bool NeedsClosingParens = printConstExprCast(CE, Static);
>> -      printConstantWithCast(CE->getOperand(0), CE->getOpcode());
>> -      switch (CE->getOpcode()) {
>> -      case Instruction::Add:
>> -      case Instruction::FAdd: Out << " + "; break;
>> -      case Instruction::Sub:
>> -      case Instruction::FSub: Out << " - "; break;
>> -      case Instruction::Mul:
>> -      case Instruction::FMul: Out << " * "; break;
>> -      case Instruction::URem:
>> -      case Instruction::SRem:
>> -      case Instruction::FRem: Out << " % "; break;
>> -      case Instruction::UDiv:
>> -      case Instruction::SDiv:
>> -      case Instruction::FDiv: Out << " / "; break;
>> -      case Instruction::And: Out << " & "; break;
>> -      case Instruction::Or:  Out << " | "; break;
>> -      case Instruction::Xor: Out << " ^ "; break;
>> -      case Instruction::Shl: Out << " << "; break;
>> -      case Instruction::LShr:
>> -      case Instruction::AShr: Out << " >> "; break;
>> -      case Instruction::ICmp:
>> -        switch (CE->getPredicate()) {
>> -          case ICmpInst::ICMP_EQ: Out << " == "; break;
>> -          case ICmpInst::ICMP_NE: Out << " != "; break;
>> -          case ICmpInst::ICMP_SLT:
>> -          case ICmpInst::ICMP_ULT: Out << " < "; break;
>> -          case ICmpInst::ICMP_SLE:
>> -          case ICmpInst::ICMP_ULE: Out << " <= "; break;
>> -          case ICmpInst::ICMP_SGT:
>> -          case ICmpInst::ICMP_UGT: Out << " > "; break;
>> -          case ICmpInst::ICMP_SGE:
>> -          case ICmpInst::ICMP_UGE: Out << " >= "; break;
>> -          default: llvm_unreachable("Illegal ICmp predicate");
>> -        }
>> -        break;
>> -      default: llvm_unreachable("Illegal opcode here!");
>> -      }
>> -      printConstantWithCast(CE->getOperand(1), CE->getOpcode());
>> -      if (NeedsClosingParens)
>> -        Out << "))";
>> -      Out << ')';
>> -      return;
>> -    }
>> -    case Instruction::FCmp: {
>> -      Out << '(';
>> -      bool NeedsClosingParens = printConstExprCast(CE, Static);
>> -      if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
>> -        Out << "0";
>> -      else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
>> -        Out << "1";
>> -      else {
>> -        const char* op = 0;
>> -        switch (CE->getPredicate()) {
>> -        default: llvm_unreachable("Illegal FCmp predicate");
>> -        case FCmpInst::FCMP_ORD: op = "ord"; break;
>> -        case FCmpInst::FCMP_UNO: op = "uno"; break;
>> -        case FCmpInst::FCMP_UEQ: op = "ueq"; break;
>> -        case FCmpInst::FCMP_UNE: op = "une"; break;
>> -        case FCmpInst::FCMP_ULT: op = "ult"; break;
>> -        case FCmpInst::FCMP_ULE: op = "ule"; break;
>> -        case FCmpInst::FCMP_UGT: op = "ugt"; break;
>> -        case FCmpInst::FCMP_UGE: op = "uge"; break;
>> -        case FCmpInst::FCMP_OEQ: op = "oeq"; break;
>> -        case FCmpInst::FCMP_ONE: op = "one"; break;
>> -        case FCmpInst::FCMP_OLT: op = "olt"; break;
>> -        case FCmpInst::FCMP_OLE: op = "ole"; break;
>> -        case FCmpInst::FCMP_OGT: op = "ogt"; break;
>> -        case FCmpInst::FCMP_OGE: op = "oge"; break;
>> -        }
>> -        Out << "llvm_fcmp_" << op << "(";
>> -        printConstantWithCast(CE->getOperand(0), CE->getOpcode());
>> -        Out << ", ";
>> -        printConstantWithCast(CE->getOperand(1), CE->getOpcode());
>> -        Out << ")";
>> -      }
>> -      if (NeedsClosingParens)
>> -        Out << "))";
>> -      Out << ')';
>> -      return;
>> -    }
>> -    default:
>> -#ifndef NDEBUG
>> -      errs() << "CWriter Error: Unhandled constant expression: "
>> -           << *CE << "\n";
>> -#endif
>> -      llvm_unreachable(0);
>> -    }
>> -  } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
>> -    Out << "((";
>> -    printType(Out, CPV->getType()); // sign doesn't matter
>> -    Out << ")/*UNDEF*/";
>> -    if (!CPV->getType()->isVectorTy()) {
>> -      Out << "0)";
>> -    } else {
>> -      Out << "{})";
>> -    }
>> -    return;
>> -  }
>> -
>> -  if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
>> -    Type* Ty = CI->getType();
>> -    if (Ty == Type::getInt1Ty(CPV->getContext()))
>> -      Out << (CI->getZExtValue() ? '1' : '0');
>> -    else if (Ty == Type::getInt32Ty(CPV->getContext()))
>> -      Out << CI->getZExtValue() << 'u';
>> -    else if (Ty->getPrimitiveSizeInBits() > 32)
>> -      Out << CI->getZExtValue() << "ull";
>> -    else {
>> -      Out << "((";
>> -      printSimpleType(Out, Ty, false) << ')';
>> -      if (CI->isMinValue(true))
>> -        Out << CI->getZExtValue() << 'u';
>> -      else
>> -        Out << CI->getSExtValue();
>> -      Out << ')';
>> -    }
>> -    return;
>> -  }
>> -
>> -  switch (CPV->getType()->getTypeID()) {
>> -  case Type::FloatTyID:
>> -  case Type::DoubleTyID:
>> -  case Type::X86_FP80TyID:
>> -  case Type::PPC_FP128TyID:
>> -  case Type::FP128TyID: {
>> -    ConstantFP *FPC = cast<ConstantFP>(CPV);
>> -    std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
>> -    if (I != FPConstantMap.end()) {
>> -      // Because of FP precision problems we must load from a stack allocated
>> -      // value that holds the value in hex.
>> -      Out << "(*(" << (FPC->getType() == Type::getFloatTy(CPV->getContext()) ?
>> -                       "float" :
>> -                       FPC->getType() == Type::getDoubleTy(CPV->getContext()) ?
>> -                       "double" :
>> -                       "long double")
>> -          << "*)&FPConstant" << I->second << ')';
>> -    } else {
>> -      double V;
>> -      if (FPC->getType() == Type::getFloatTy(CPV->getContext()))
>> -        V = FPC->getValueAPF().convertToFloat();
>> -      else if (FPC->getType() == Type::getDoubleTy(CPV->getContext()))
>> -        V = FPC->getValueAPF().convertToDouble();
>> -      else {
>> -        // Long double.  Convert the number to double, discarding precision.
>> -        // This is not awesome, but it at least makes the CBE output somewhat
>> -        // useful.
>> -        APFloat Tmp = FPC->getValueAPF();
>> -        bool LosesInfo;
>> -        Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
>> -        V = Tmp.convertToDouble();
>> -      }
>> -
>> -      if (IsNAN(V)) {
>> -        // The value is NaN
>> -
>> -        // FIXME the actual NaN bits should be emitted.
>> -        // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
>> -        // it's 0x7ff4.
>> -        const unsigned long QuietNaN = 0x7ff8UL;
>> -        //const unsigned long SignalNaN = 0x7ff4UL;
>> -
>> -        // We need to grab the first part of the FP #
>> -        char Buffer[100];
>> -
>> -        uint64_t ll = DoubleToBits(V);
>> -        sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
>> -
>> -        std::string Num(&Buffer[0], &Buffer[6]);
>> -        unsigned long Val = strtoul(Num.c_str(), 0, 16);
>> -
>> -        if (FPC->getType() == Type::getFloatTy(FPC->getContext()))
>> -          Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
>> -              << Buffer << "\") /*nan*/ ";
>> -        else
>> -          Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
>> -              << Buffer << "\") /*nan*/ ";
>> -      } else if (IsInf(V)) {
>> -        // The value is Inf
>> -        if (V < 0) Out << '-';
>> -        Out << "LLVM_INF" <<
>> -            (FPC->getType() == Type::getFloatTy(FPC->getContext()) ? "F" : "")
>> -            << " /*inf*/ ";
>> -      } else {
>> -        std::string Num;
>> -#if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
>> -        // Print out the constant as a floating point number.
>> -        char Buffer[100];
>> -        sprintf(Buffer, "%a", V);
>> -        Num = Buffer;
>> -#else
>> -        Num = ftostr(FPC->getValueAPF());
>> -#endif
>> -       Out << Num;
>> -      }
>> -    }
>> -    break;
>> -  }
>> -
>> -  case Type::ArrayTyID:
>> -    // Use C99 compound expression literal initializer syntax.
>> -    if (!Static) {
>> -      Out << "(";
>> -      printType(Out, CPV->getType());
>> -      Out << ")";
>> -    }
>> -    Out << "{ "; // Arrays are wrapped in struct types.
>> -    if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
>> -      printConstantArray(CA, Static);
>> -    } else if (ConstantDataSequential *CDS =
>> -                 dyn_cast<ConstantDataSequential>(CPV)) {
>> -      printConstantDataSequential(CDS, Static);
>> -    } else {
>> -      assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
>> -      ArrayType *AT = cast<ArrayType>(CPV->getType());
>> -      Out << '{';
>> -      if (AT->getNumElements()) {
>> -        Out << ' ';
>> -        Constant *CZ = Constant::getNullValue(AT->getElementType());
>> -        printConstant(CZ, Static);
>> -        for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
>> -          Out << ", ";
>> -          printConstant(CZ, Static);
>> -        }
>> -      }
>> -      Out << " }";
>> -    }
>> -    Out << " }"; // Arrays are wrapped in struct types.
>> -    break;
>> -
>> -  case Type::VectorTyID:
>> -    // Use C99 compound expression literal initializer syntax.
>> -    if (!Static) {
>> -      Out << "(";
>> -      printType(Out, CPV->getType());
>> -      Out << ")";
>> -    }
>> -    if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
>> -      printConstantVector(CV, Static);
>> -    } else if (ConstantDataSequential *CDS =
>> -               dyn_cast<ConstantDataSequential>(CPV)) {
>> -      printConstantDataSequential(CDS, Static);
>> -    } else {
>> -      assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
>> -      VectorType *VT = cast<VectorType>(CPV->getType());
>> -      Out << "{ ";
>> -      Constant *CZ = Constant::getNullValue(VT->getElementType());
>> -      printConstant(CZ, Static);
>> -      for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
>> -        Out << ", ";
>> -        printConstant(CZ, Static);
>> -      }
>> -      Out << " }";
>> -    }
>> -    break;
>> -
>> -  case Type::StructTyID:
>> -    // Use C99 compound expression literal initializer syntax.
>> -    if (!Static) {
>> -      Out << "(";
>> -      printType(Out, CPV->getType());
>> -      Out << ")";
>> -    }
>> -    if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
>> -      StructType *ST = cast<StructType>(CPV->getType());
>> -      Out << '{';
>> -      if (ST->getNumElements()) {
>> -        Out << ' ';
>> -        printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
>> -        for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
>> -          Out << ", ";
>> -          printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
>> -        }
>> -      }
>> -      Out << " }";
>> -    } else {
>> -      Out << '{';
>> -      if (CPV->getNumOperands()) {
>> -        Out << ' ';
>> -        printConstant(cast<Constant>(CPV->getOperand(0)), Static);
>> -        for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
>> -          Out << ", ";
>> -          printConstant(cast<Constant>(CPV->getOperand(i)), Static);
>> -        }
>> -      }
>> -      Out << " }";
>> -    }
>> -    break;
>> -
>> -  case Type::PointerTyID:
>> -    if (isa<ConstantPointerNull>(CPV)) {
>> -      Out << "((";
>> -      printType(Out, CPV->getType()); // sign doesn't matter
>> -      Out << ")/*NULL*/0)";
>> -      break;
>> -    } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
>> -      writeOperand(GV, Static);
>> -      break;
>> -    }
>> -    // FALL THROUGH
>> -  default:
>> -#ifndef NDEBUG
>> -    errs() << "Unknown constant type: " << *CPV << "\n";
>> -#endif
>> -    llvm_unreachable(0);
>> -  }
>> -}
>> -
>> -// Some constant expressions need to be casted back to the original types
>> -// because their operands were casted to the expected type. This function takes
>> -// care of detecting that case and printing the cast for the ConstantExpr.
>> -bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
>> -  bool NeedsExplicitCast = false;
>> -  Type *Ty = CE->getOperand(0)->getType();
>> -  bool TypeIsSigned = false;
>> -  switch (CE->getOpcode()) {
>> -  case Instruction::Add:
>> -  case Instruction::Sub:
>> -  case Instruction::Mul:
>> -    // We need to cast integer arithmetic so that it is always performed
>> -    // as unsigned, to avoid undefined behavior on overflow.
>> -  case Instruction::LShr:
>> -  case Instruction::URem:
>> -  case Instruction::UDiv: NeedsExplicitCast = true; break;
>> -  case Instruction::AShr:
>> -  case Instruction::SRem:
>> -  case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
>> -  case Instruction::SExt:
>> -    Ty = CE->getType();
>> -    NeedsExplicitCast = true;
>> -    TypeIsSigned = true;
>> -    break;
>> -  case Instruction::ZExt:
>> -  case Instruction::Trunc:
>> -  case Instruction::FPTrunc:
>> -  case Instruction::FPExt:
>> -  case Instruction::UIToFP:
>> -  case Instruction::SIToFP:
>> -  case Instruction::FPToUI:
>> -  case Instruction::FPToSI:
>> -  case Instruction::PtrToInt:
>> -  case Instruction::IntToPtr:
>> -  case Instruction::BitCast:
>> -    Ty = CE->getType();
>> -    NeedsExplicitCast = true;
>> -    break;
>> -  default: break;
>> -  }
>> -  if (NeedsExplicitCast) {
>> -    Out << "((";
>> -    if (Ty->isIntegerTy() && Ty != Type::getInt1Ty(Ty->getContext()))
>> -      printSimpleType(Out, Ty, TypeIsSigned);
>> -    else
>> -      printType(Out, Ty); // not integer, sign doesn't matter
>> -    Out << ")(";
>> -  }
>> -  return NeedsExplicitCast;
>> -}
>> -
>> -//  Print a constant assuming that it is the operand for a given Opcode. The
>> -//  opcodes that care about sign need to cast their operands to the expected
>> -//  type before the operation proceeds. This function does the casting.
>> -void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
>> -
>> -  // Extract the operand's type, we'll need it.
>> -  Type* OpTy = CPV->getType();
>> -
>> -  // Indicate whether to do the cast or not.
>> -  bool shouldCast = false;
>> -  bool typeIsSigned = false;
>> -
>> -  // Based on the Opcode for which this Constant is being written, determine
>> -  // the new type to which the operand should be casted by setting the value
>> -  // of OpTy. If we change OpTy, also set shouldCast to true so it gets
>> -  // casted below.
>> -  switch (Opcode) {
>> -    default:
>> -      // for most instructions, it doesn't matter
>> -      break;
>> -    case Instruction::Add:
>> -    case Instruction::Sub:
>> -    case Instruction::Mul:
>> -      // We need to cast integer arithmetic so that it is always performed
>> -      // as unsigned, to avoid undefined behavior on overflow.
>> -    case Instruction::LShr:
>> -    case Instruction::UDiv:
>> -    case Instruction::URem:
>> -      shouldCast = true;
>> -      break;
>> -    case Instruction::AShr:
>> -    case Instruction::SDiv:
>> -    case Instruction::SRem:
>> -      shouldCast = true;
>> -      typeIsSigned = true;
>> -      break;
>> -  }
>> -
>> -  // Write out the casted constant if we should, otherwise just write the
>> -  // operand.
>> -  if (shouldCast) {
>> -    Out << "((";
>> -    printSimpleType(Out, OpTy, typeIsSigned);
>> -    Out << ")";
>> -    printConstant(CPV, false);
>> -    Out << ")";
>> -  } else
>> -    printConstant(CPV, false);
>> -}
>> -
>> -std::string CWriter::GetValueName(const Value *Operand) {
>> -
>> -  // Resolve potential alias.
>> -  if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(Operand)) {
>> -    if (const Value *V = GA->resolveAliasedGlobal(false))
>> -      Operand = V;
>> -  }
>> -
>> -  // Mangle globals with the standard mangler interface for LLC compatibility.
>> -  if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand)) {
>> -    SmallString<128> Str;
>> -    Mang->getNameWithPrefix(Str, GV, false);
>> -    return CBEMangle(Str.str().str());
>> -  }
>> -
>> -  std::string Name = Operand->getName();
>> -
>> -  if (Name.empty()) { // Assign unique names to local temporaries.
>> -    unsigned &No = AnonValueNumbers[Operand];
>> -    if (No == 0)
>> -      No = ++NextAnonValueNumber;
>> -    Name = "tmp__" + utostr(No);
>> -  }
>> -
>> -  std::string VarName;
>> -  VarName.reserve(Name.capacity());
>> -
>> -  for (std::string::iterator I = Name.begin(), E = Name.end();
>> -       I != E; ++I) {
>> -    char ch = *I;
>> -
>> -    if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
>> -          (ch >= '0' && ch <= '9') || ch == '_')) {
>> -      char buffer[5];
>> -      sprintf(buffer, "_%x_", ch);
>> -      VarName += buffer;
>> -    } else
>> -      VarName += ch;
>> -  }
>> -
>> -  return "llvm_cbe_" + VarName;
>> -}
>> -
>> -/// writeInstComputationInline - Emit the computation for the specified
>> -/// instruction inline, with no destination provided.
>> -void CWriter::writeInstComputationInline(Instruction &I) {
>> -  // We can't currently support integer types other than 1, 8, 16, 32, 64.
>> -  // Validate this.
>> -  Type *Ty = I.getType();
>> -  if (Ty->isIntegerTy() && (Ty!=Type::getInt1Ty(I.getContext()) &&
>> -        Ty!=Type::getInt8Ty(I.getContext()) &&
>> -        Ty!=Type::getInt16Ty(I.getContext()) &&
>> -        Ty!=Type::getInt32Ty(I.getContext()) &&
>> -        Ty!=Type::getInt64Ty(I.getContext()))) {
>> -      report_fatal_error("The C backend does not currently support integer "
>> -                        "types of widths other than 1, 8, 16, 32, 64.\n"
>> -                        "This is being tracked as PR 4158.");
>> -  }
>> -
>> -  // If this is a non-trivial bool computation, make sure to truncate down to
>> -  // a 1 bit value.  This is important because we want "add i1 x, y" to return
>> -  // "0" when x and y are true, not "2" for example.
>> -  bool NeedBoolTrunc = false;
>> -  if (I.getType() == Type::getInt1Ty(I.getContext()) &&
>> -      !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
>> -    NeedBoolTrunc = true;
>> -
>> -  if (NeedBoolTrunc)
>> -    Out << "((";
>> -
>> -  visit(I);
>> -
>> -  if (NeedBoolTrunc)
>> -    Out << ")&1)";
>> -}
>> -
>> -
>> -void CWriter::writeOperandInternal(Value *Operand, bool Static) {
>> -  if (Instruction *I = dyn_cast<Instruction>(Operand))
>> -    // Should we inline this instruction to build a tree?
>> -    if (isInlinableInst(*I) && !isDirectAlloca(I)) {
>> -      Out << '(';
>> -      writeInstComputationInline(*I);
>> -      Out << ')';
>> -      return;
>> -    }
>> -
>> -  Constant* CPV = dyn_cast<Constant>(Operand);
>> -
>> -  if (CPV && !isa<GlobalValue>(CPV))
>> -    printConstant(CPV, Static);
>> -  else
>> -    Out << GetValueName(Operand);
>> -}
>> -
>> -void CWriter::writeOperand(Value *Operand, bool Static) {
>> -  bool isAddressImplicit = isAddressExposed(Operand);
>> -  if (isAddressImplicit)
>> -    Out << "(&";  // Global variables are referenced as their addresses by llvm
>> -
>> -  writeOperandInternal(Operand, Static);
>> -
>> -  if (isAddressImplicit)
>> -    Out << ')';
>> -}
>> -
>> -// Some instructions need to have their result value casted back to the
>> -// original types because their operands were casted to the expected type.
>> -// This function takes care of detecting that case and printing the cast
>> -// for the Instruction.
>> -bool CWriter::writeInstructionCast(const Instruction &I) {
>> -  Type *Ty = I.getOperand(0)->getType();
>> -  switch (I.getOpcode()) {
>> -  case Instruction::Add:
>> -  case Instruction::Sub:
>> -  case Instruction::Mul:
>> -    // We need to cast integer arithmetic so that it is always performed
>> -    // as unsigned, to avoid undefined behavior on overflow.
>> -  case Instruction::LShr:
>> -  case Instruction::URem:
>> -  case Instruction::UDiv:
>> -    Out << "((";
>> -    printSimpleType(Out, Ty, false);
>> -    Out << ")(";
>> -    return true;
>> -  case Instruction::AShr:
>> -  case Instruction::SRem:
>> -  case Instruction::SDiv:
>> -    Out << "((";
>> -    printSimpleType(Out, Ty, true);
>> -    Out << ")(";
>> -    return true;
>> -  default: break;
>> -  }
>> -  return false;
>> -}
>> -
>> -// Write the operand with a cast to another type based on the Opcode being used.
>> -// This will be used in cases where an instruction has specific type
>> -// requirements (usually signedness) for its operands.
>> -void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
>> -
>> -  // Extract the operand's type, we'll need it.
>> -  Type* OpTy = Operand->getType();
>> -
>> -  // Indicate whether to do the cast or not.
>> -  bool shouldCast = false;
>> -
>> -  // Indicate whether the cast should be to a signed type or not.
>> -  bool castIsSigned = false;
>> -
>> -  // Based on the Opcode for which this Operand is being written, determine
>> -  // the new type to which the operand should be casted by setting the value
>> -  // of OpTy. If we change OpTy, also set shouldCast to true.
>> -  switch (Opcode) {
>> -    default:
>> -      // for most instructions, it doesn't matter
>> -      break;
>> -    case Instruction::Add:
>> -    case Instruction::Sub:
>> -    case Instruction::Mul:
>> -      // We need to cast integer arithmetic so that it is always performed
>> -      // as unsigned, to avoid undefined behavior on overflow.
>> -    case Instruction::LShr:
>> -    case Instruction::UDiv:
>> -    case Instruction::URem: // Cast to unsigned first
>> -      shouldCast = true;
>> -      castIsSigned = false;
>> -      break;
>> -    case Instruction::GetElementPtr:
>> -    case Instruction::AShr:
>> -    case Instruction::SDiv:
>> -    case Instruction::SRem: // Cast to signed first
>> -      shouldCast = true;
>> -      castIsSigned = true;
>> -      break;
>> -  }
>> -
>> -  // Write out the casted operand if we should, otherwise just write the
>> -  // operand.
>> -  if (shouldCast) {
>> -    Out << "((";
>> -    printSimpleType(Out, OpTy, castIsSigned);
>> -    Out << ")";
>> -    writeOperand(Operand);
>> -    Out << ")";
>> -  } else
>> -    writeOperand(Operand);
>> -}
>> -
>> -// Write the operand with a cast to another type based on the icmp predicate
>> -// being used.
>> -void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
>> -  // This has to do a cast to ensure the operand has the right signedness.
>> -  // Also, if the operand is a pointer, we make sure to cast to an integer when
>> -  // doing the comparison both for signedness and so that the C compiler doesn't
>> -  // optimize things like "p < NULL" to false (p may contain an integer value
>> -  // f.e.).
>> -  bool shouldCast = Cmp.isRelational();
>> -
>> -  // Write out the casted operand if we should, otherwise just write the
>> -  // operand.
>> -  if (!shouldCast) {
>> -    writeOperand(Operand);
>> -    return;
>> -  }
>> -
>> -  // Should this be a signed comparison?  If so, convert to signed.
>> -  bool castIsSigned = Cmp.isSigned();
>> -
>> -  // If the operand was a pointer, convert to a large integer type.
>> -  Type* OpTy = Operand->getType();
>> -  if (OpTy->isPointerTy())
>> -    OpTy = TD->getIntPtrType(Operand->getContext());
>> -
>> -  Out << "((";
>> -  printSimpleType(Out, OpTy, castIsSigned);
>> -  Out << ")";
>> -  writeOperand(Operand);
>> -  Out << ")";
>> -}
>> -
>> -// generateCompilerSpecificCode - This is where we add conditional compilation
>> -// directives to cater to specific compilers as need be.
>> -//
>> -static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
>> -                                         const TargetData *TD) {
>> -  // Alloca is hard to get, and we don't want to include stdlib.h here.
>> -  Out << "/* get a declaration for alloca */\n"
>> -      << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
>> -      << "#define  alloca(x) __builtin_alloca((x))\n"
>> -      << "#define _alloca(x) __builtin_alloca((x))\n"
>> -      << "#elif defined(__APPLE__)\n"
>> -      << "extern void *__builtin_alloca(unsigned long);\n"
>> -      << "#define alloca(x) __builtin_alloca(x)\n"
>> -      << "#define longjmp _longjmp\n"
>> -      << "#define setjmp _setjmp\n"
>> -      << "#elif defined(__sun__)\n"
>> -      << "#if defined(__sparcv9)\n"
>> -      << "extern void *__builtin_alloca(unsigned long);\n"
>> -      << "#else\n"
>> -      << "extern void *__builtin_alloca(unsigned int);\n"
>> -      << "#endif\n"
>> -      << "#define alloca(x) __builtin_alloca(x)\n"
>> -      << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
>> -      << "#define alloca(x) __builtin_alloca(x)\n"
>> -      << "#elif defined(_MSC_VER)\n"
>> -      << "#define inline _inline\n"
>> -      << "#define alloca(x) _alloca(x)\n"
>> -      << "#else\n"
>> -      << "#include <alloca.h>\n"
>> -      << "#endif\n\n";
>> -
>> -  // We output GCC specific attributes to preserve 'linkonce'ness on globals.
>> -  // If we aren't being compiled with GCC, just drop these attributes.
>> -  Out << "#ifndef __GNUC__  /* Can only support \"linkonce\" vars with GCC */\n"
>> -      << "#define __attribute__(X)\n"
>> -      << "#endif\n\n";
>> -
>> -  // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
>> -  Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
>> -      << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
>> -      << "#elif defined(__GNUC__)\n"
>> -      << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
>> -      << "#else\n"
>> -      << "#define __EXTERNAL_WEAK__\n"
>> -      << "#endif\n\n";
>> -
>> -  // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
>> -  Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
>> -      << "#define __ATTRIBUTE_WEAK__\n"
>> -      << "#elif defined(__GNUC__)\n"
>> -      << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
>> -      << "#else\n"
>> -      << "#define __ATTRIBUTE_WEAK__\n"
>> -      << "#endif\n\n";
>> -
>> -  // Add hidden visibility support. FIXME: APPLE_CC?
>> -  Out << "#if defined(__GNUC__)\n"
>> -      << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
>> -      << "#endif\n\n";
>> -
>> -  // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
>> -  // From the GCC documentation:
>> -  //
>> -  //   double __builtin_nan (const char *str)
>> -  //
>> -  // This is an implementation of the ISO C99 function nan.
>> -  //
>> -  // Since ISO C99 defines this function in terms of strtod, which we do
>> -  // not implement, a description of the parsing is in order. The string is
>> -  // parsed as by strtol; that is, the base is recognized by leading 0 or
>> -  // 0x prefixes. The number parsed is placed in the significand such that
>> -  // the least significant bit of the number is at the least significant
>> -  // bit of the significand. The number is truncated to fit the significand
>> -  // field provided. The significand is forced to be a quiet NaN.
>> -  //
>> -  // This function, if given a string literal, is evaluated early enough
>> -  // that it is considered a compile-time constant.
>> -  //
>> -  //   float __builtin_nanf (const char *str)
>> -  //
>> -  // Similar to __builtin_nan, except the return type is float.
>> -  //
>> -  //   double __builtin_inf (void)
>> -  //
>> -  // Similar to __builtin_huge_val, except a warning is generated if the
>> -  // target floating-point format does not support infinities. This
>> -  // function is suitable for implementing the ISO C99 macro INFINITY.
>> -  //
>> -  //   float __builtin_inff (void)
>> -  //
>> -  // Similar to __builtin_inf, except the return type is float.
>> -  Out << "#ifdef __GNUC__\n"
>> -      << "#define LLVM_NAN(NanStr)   __builtin_nan(NanStr)   /* Double */\n"
>> -      << "#define LLVM_NANF(NanStr)  __builtin_nanf(NanStr)  /* Float */\n"
>> -      << "#define LLVM_NANS(NanStr)  __builtin_nans(NanStr)  /* Double */\n"
>> -      << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
>> -      << "#define LLVM_INF           __builtin_inf()         /* Double */\n"
>> -      << "#define LLVM_INFF          __builtin_inff()        /* Float */\n"
>> -      << "#define LLVM_PREFETCH(addr,rw,locality) "
>> -                              "__builtin_prefetch(addr,rw,locality)\n"
>> -      << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
>> -      << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
>> -      << "#define LLVM_ASM           __asm__\n"
>> -      << "#else\n"
>> -      << "#define LLVM_NAN(NanStr)   ((double)0.0)           /* Double */\n"
>> -      << "#define LLVM_NANF(NanStr)  0.0F                    /* Float */\n"
>> -      << "#define LLVM_NANS(NanStr)  ((double)0.0)           /* Double */\n"
>> -      << "#define LLVM_NANSF(NanStr) 0.0F                    /* Float */\n"
>> -      << "#define LLVM_INF           ((double)0.0)           /* Double */\n"
>> -      << "#define LLVM_INFF          0.0F                    /* Float */\n"
>> -      << "#define LLVM_PREFETCH(addr,rw,locality)            /* PREFETCH */\n"
>> -      << "#define __ATTRIBUTE_CTOR__\n"
>> -      << "#define __ATTRIBUTE_DTOR__\n"
>> -      << "#define LLVM_ASM(X)\n"
>> -      << "#endif\n\n";
>> -
>> -  Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
>> -      << "#define __builtin_stack_save() 0   /* not implemented */\n"
>> -      << "#define __builtin_stack_restore(X) /* noop */\n"
>> -      << "#endif\n\n";
>> -
>> -  // Output typedefs for 128-bit integers. If these are needed with a
>> -  // 32-bit target or with a C compiler that doesn't support mode(TI),
>> -  // more drastic measures will be needed.
>> -  Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
>> -      << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
>> -      << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
>> -      << "#endif\n\n";
>> -
>> -  // Output target-specific code that should be inserted into main.
>> -  Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
>> -}
>> -
>> -/// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
>> -/// the StaticTors set.
>> -static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
>> -  ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
>> -  if (!InitList) return;
>> -
>> -  for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
>> -    if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
>> -      if (CS->getNumOperands() != 2) return;  // Not array of 2-element structs.
>> -
>> -      if (CS->getOperand(1)->isNullValue())
>> -        return;  // Found a null terminator, exit printing.
>> -      Constant *FP = CS->getOperand(1);
>> -      if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
>> -        if (CE->isCast())
>> -          FP = CE->getOperand(0);
>> -      if (Function *F = dyn_cast<Function>(FP))
>> -        StaticTors.insert(F);
>> -    }
>> -}
>> -
>> -enum SpecialGlobalClass {
>> -  NotSpecial = 0,
>> -  GlobalCtors, GlobalDtors,
>> -  NotPrinted
>> -};
>> -
>> -/// getGlobalVariableClass - If this is a global that is specially recognized
>> -/// by LLVM, return a code that indicates how we should handle it.
>> -static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
>> -  // If this is a global ctors/dtors list, handle it now.
>> -  if (GV->hasAppendingLinkage() && GV->use_empty()) {
>> -    if (GV->getName() == "llvm.global_ctors")
>> -      return GlobalCtors;
>> -    else if (GV->getName() == "llvm.global_dtors")
>> -      return GlobalDtors;
>> -  }
>> -
>> -  // Otherwise, if it is other metadata, don't print it.  This catches things
>> -  // like debug information.
>> -  if (GV->getSection() == "llvm.metadata")
>> -    return NotPrinted;
>> -
>> -  return NotSpecial;
>> -}
>> -
>> -// PrintEscapedString - Print each character of the specified string, escaping
>> -// it if it is not printable or if it is an escape char.
>> -static void PrintEscapedString(const char *Str, unsigned Length,
>> -                               raw_ostream &Out) {
>> -  for (unsigned i = 0; i != Length; ++i) {
>> -    unsigned char C = Str[i];
>> -    if (isprint(C) && C != '\\' && C != '"')
>> -      Out << C;
>> -    else if (C == '\\')
>> -      Out << "\\\\";
>> -    else if (C == '\"')
>> -      Out << "\\\"";
>> -    else if (C == '\t')
>> -      Out << "\\t";
>> -    else
>> -      Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
>> -  }
>> -}
>> -
>> -// PrintEscapedString - Print each character of the specified string, escaping
>> -// it if it is not printable or if it is an escape char.
>> -static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
>> -  PrintEscapedString(Str.c_str(), Str.size(), Out);
>> -}
>> -
>> -bool CWriter::doInitialization(Module &M) {
>> -  FunctionPass::doInitialization(M);
>> -
>> -  // Initialize
>> -  TheModule = &M;
>> -
>> -  TD = new TargetData(&M);
>> -  IL = new IntrinsicLowering(*TD);
>> -  IL->AddPrototypes(M);
>> -
>> -#if 0
>> -  std::string Triple = TheModule->getTargetTriple();
>> -  if (Triple.empty())
>> -    Triple = llvm::sys::getDefaultTargetTriple();
>> -
>> -  std::string E;
>> -  if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
>> -    TAsm = Match->createMCAsmInfo(Triple);
>> -#endif
>> -  TAsm = new CBEMCAsmInfo();
>> -  MRI  = new MCRegisterInfo();
>> -  TCtx = new MCContext(*TAsm, *MRI, NULL);
>> -  Mang = new Mangler(*TCtx, *TD);
>> -
>> -  // Keep track of which functions are static ctors/dtors so they can have
>> -  // an attribute added to their prototypes.
>> -  std::set<Function*> StaticCtors, StaticDtors;
>> -  for (Module::global_iterator I = M.global_begin(), E = M.global_end();
>> -       I != E; ++I) {
>> -    switch (getGlobalVariableClass(I)) {
>> -    default: break;
>> -    case GlobalCtors:
>> -      FindStaticTors(I, StaticCtors);
>> -      break;
>> -    case GlobalDtors:
>> -      FindStaticTors(I, StaticDtors);
>> -      break;
>> -    }
>> -  }
>> -
>> -  // get declaration for alloca
>> -  Out << "/* Provide Declarations */\n";
>> -  Out << "#include <stdarg.h>\n";      // Varargs support
>> -  Out << "#include <setjmp.h>\n";      // Unwind support
>> -  Out << "#include <limits.h>\n";      // With overflow intrinsics support.
>> -  generateCompilerSpecificCode(Out, TD);
>> -
>> -  // Provide a definition for `bool' if not compiling with a C++ compiler.
>> -  Out << "\n"
>> -      << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
>> -
>> -      << "\n\n/* Support for floating point constants */\n"
>> -      << "typedef unsigned long long ConstantDoubleTy;\n"
>> -      << "typedef unsigned int        ConstantFloatTy;\n"
>> -      << "typedef struct { unsigned long long f1; unsigned short f2; "
>> -         "unsigned short pad[3]; } ConstantFP80Ty;\n"
>> -      // This is used for both kinds of 128-bit long double; meaning differs.
>> -      << "typedef struct { unsigned long long f1; unsigned long long f2; }"
>> -         " ConstantFP128Ty;\n"
>> -      << "\n\n/* Global Declarations */\n";
>> -
>> -  // First output all the declarations for the program, because C requires
>> -  // Functions & globals to be declared before they are used.
>> -  //
>> -  if (!M.getModuleInlineAsm().empty()) {
>> -    Out << "/* Module asm statements */\n"
>> -        << "asm(";
>> -
>> -    // Split the string into lines, to make it easier to read the .ll file.
>> -    std::string Asm = M.getModuleInlineAsm();
>> -    size_t CurPos = 0;
>> -    size_t NewLine = Asm.find_first_of('\n', CurPos);
>> -    while (NewLine != std::string::npos) {
>> -      // We found a newline, print the portion of the asm string from the
>> -      // last newline up to this newline.
>> -      Out << "\"";
>> -      PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
>> -                         Out);
>> -      Out << "\\n\"\n";
>> -      CurPos = NewLine+1;
>> -      NewLine = Asm.find_first_of('\n', CurPos);
>> -    }
>> -    Out << "\"";
>> -    PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
>> -    Out << "\");\n"
>> -        << "/* End Module asm statements */\n";
>> -  }
>> -
>> -  // Loop over the symbol table, emitting all named constants.
>> -  printModuleTypes();
>> -
>> -  // Global variable declarations...
>> -  if (!M.global_empty()) {
>> -    Out << "\n/* External Global Variable Declarations */\n";
>> -    for (Module::global_iterator I = M.global_begin(), E = M.global_end();
>> -         I != E; ++I) {
>> -
>> -      if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
>> -          I->hasCommonLinkage())
>> -        Out << "extern ";
>> -      else if (I->hasDLLImportLinkage())
>> -        Out << "__declspec(dllimport) ";
>> -      else
>> -        continue; // Internal Global
>> -
>> -      // Thread Local Storage
>> -      if (I->isThreadLocal())
>> -        Out << "__thread ";
>> -
>> -      printType(Out, I->getType()->getElementType(), false, GetValueName(I));
>> -
>> -      if (I->hasExternalWeakLinkage())
>> -         Out << " __EXTERNAL_WEAK__";
>> -      Out << ";\n";
>> -    }
>> -  }
>> -
>> -  // Function declarations
>> -  Out << "\n/* Function Declarations */\n";
>> -  Out << "double fmod(double, double);\n";   // Support for FP rem
>> -  Out << "float fmodf(float, float);\n";
>> -  Out << "long double fmodl(long double, long double);\n";
>> -
>> -  // Store the intrinsics which will be declared/defined below.
>> -  SmallVector<const Function*, 8> intrinsicsToDefine;
>> -
>> -  for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
>> -    // Don't print declarations for intrinsic functions.
>> -    // Store the used intrinsics, which need to be explicitly defined.
>> -    if (I->isIntrinsic()) {
>> -      switch (I->getIntrinsicID()) {
>> -        default:
>> -          break;
>> -        case Intrinsic::uadd_with_overflow:
>> -        case Intrinsic::sadd_with_overflow:
>> -          intrinsicsToDefine.push_back(I);
>> -          break;
>> -      }
>> -      continue;
>> -    }
>> -
>> -    if (I->getName() == "setjmp" ||
>> -        I->getName() == "longjmp" || I->getName() == "_setjmp")
>> -      continue;
>> -
>> -    if (I->hasExternalWeakLinkage())
>> -      Out << "extern ";
>> -    printFunctionSignature(I, true);
>> -    if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
>> -      Out << " __ATTRIBUTE_WEAK__";
>> -    if (I->hasExternalWeakLinkage())
>> -      Out << " __EXTERNAL_WEAK__";
>> -    if (StaticCtors.count(I))
>> -      Out << " __ATTRIBUTE_CTOR__";
>> -    if (StaticDtors.count(I))
>> -      Out << " __ATTRIBUTE_DTOR__";
>> -    if (I->hasHiddenVisibility())
>> -      Out << " __HIDDEN__";
>> -
>> -    if (I->hasName() && I->getName()[0] == 1)
>> -      Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
>> -
>> -    Out << ";\n";
>> -  }
>> -
>> -  // Output the global variable declarations
>> -  if (!M.global_empty()) {
>> -    Out << "\n\n/* Global Variable Declarations */\n";
>> -    for (Module::global_iterator I = M.global_begin(), E = M.global_end();
>> -         I != E; ++I)
>> -      if (!I->isDeclaration()) {
>> -        // Ignore special globals, such as debug info.
>> -        if (getGlobalVariableClass(I))
>> -          continue;
>> -
>> -        if (I->hasLocalLinkage())
>> -          Out << "static ";
>> -        else
>> -          Out << "extern ";
>> -
>> -        // Thread Local Storage
>> -        if (I->isThreadLocal())
>> -          Out << "__thread ";
>> -
>> -        printType(Out, I->getType()->getElementType(), false,
>> -                  GetValueName(I));
>> -
>> -        if (I->hasLinkOnceLinkage())
>> -          Out << " __attribute__((common))";
>> -        else if (I->hasCommonLinkage())     // FIXME is this right?
>> -          Out << " __ATTRIBUTE_WEAK__";
>> -        else if (I->hasWeakLinkage())
>> -          Out << " __ATTRIBUTE_WEAK__";
>> -        else if (I->hasExternalWeakLinkage())
>> -          Out << " __EXTERNAL_WEAK__";
>> -        if (I->hasHiddenVisibility())
>> -          Out << " __HIDDEN__";
>> -        Out << ";\n";
>> -      }
>> -  }
>> -
>> -  // Output the global variable definitions and contents...
>> -  if (!M.global_empty()) {
>> -    Out << "\n\n/* Global Variable Definitions and Initialization */\n";
>> -    for (Module::global_iterator I = M.global_begin(), E = M.global_end();
>> -         I != E; ++I)
>> -      if (!I->isDeclaration()) {
>> -        // Ignore special globals, such as debug info.
>> -        if (getGlobalVariableClass(I))
>> -          continue;
>> -
>> -        if (I->hasLocalLinkage())
>> -          Out << "static ";
>> -        else if (I->hasDLLImportLinkage())
>> -          Out << "__declspec(dllimport) ";
>> -        else if (I->hasDLLExportLinkage())
>> -          Out << "__declspec(dllexport) ";
>> -
>> -        // Thread Local Storage
>> -        if (I->isThreadLocal())
>> -          Out << "__thread ";
>> -
>> -        printType(Out, I->getType()->getElementType(), false,
>> -                  GetValueName(I));
>> -        if (I->hasLinkOnceLinkage())
>> -          Out << " __attribute__((common))";
>> -        else if (I->hasWeakLinkage())
>> -          Out << " __ATTRIBUTE_WEAK__";
>> -        else if (I->hasCommonLinkage())
>> -          Out << " __ATTRIBUTE_WEAK__";
>> -
>> -        if (I->hasHiddenVisibility())
>> -          Out << " __HIDDEN__";
>> -
>> -        // If the initializer is not null, emit the initializer.  If it is null,
>> -        // we try to avoid emitting large amounts of zeros.  The problem with
>> -        // this, however, occurs when the variable has weak linkage.  In this
>> -        // case, the assembler will complain about the variable being both weak
>> -        // and common, so we disable this optimization.
>> -        // FIXME common linkage should avoid this problem.
>> -        if (!I->getInitializer()->isNullValue()) {
>> -          Out << " = " ;
>> -          writeOperand(I->getInitializer(), true);
>> -        } else if (I->hasWeakLinkage()) {
>> -          // We have to specify an initializer, but it doesn't have to be
>> -          // complete.  If the value is an aggregate, print out { 0 }, and let
>> -          // the compiler figure out the rest of the zeros.
>> -          Out << " = " ;
>> -          if (I->getInitializer()->getType()->isStructTy() ||
>> -              I->getInitializer()->getType()->isVectorTy()) {
>> -            Out << "{ 0 }";
>> -          } else if (I->getInitializer()->getType()->isArrayTy()) {
>> -            // As with structs and vectors, but with an extra set of braces
>> -            // because arrays are wrapped in structs.
>> -            Out << "{ { 0 } }";
>> -          } else {
>> -            // Just print it out normally.
>> -            writeOperand(I->getInitializer(), true);
>> -          }
>> -        }
>> -        Out << ";\n";
>> -      }
>> -  }
>> -
>> -  if (!M.empty())
>> -    Out << "\n\n/* Function Bodies */\n";
>> -
>> -  // Emit some helper functions for dealing with FCMP instruction's
>> -  // predicates
>> -  Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
>> -  Out << "return X == X && Y == Y; }\n";
>> -  Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
>> -  Out << "return X != X || Y != Y; }\n";
>> -  Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
>> -  Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
>> -  Out << "return X != Y; }\n";
>> -  Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
>> -  Out << "return X <  Y || llvm_fcmp_uno(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
>> -  Out << "return X >  Y || llvm_fcmp_uno(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
>> -  Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
>> -  Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
>> -  Out << "return X == Y ; }\n";
>> -  Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
>> -  Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
>> -  Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
>> -  Out << "return X <  Y ; }\n";
>> -  Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
>> -  Out << "return X >  Y ; }\n";
>> -  Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
>> -  Out << "return X <= Y ; }\n";
>> -  Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
>> -  Out << "return X >= Y ; }\n";
>> -
>> -  // Emit definitions of the intrinsics.
>> -  for (SmallVector<const Function*, 8>::const_iterator
>> -       I = intrinsicsToDefine.begin(),
>> -       E = intrinsicsToDefine.end(); I != E; ++I) {
>> -    printIntrinsicDefinition(**I, Out);
>> -  }
>> -
>> -  return false;
>> -}
>> -
>> -
>> -/// Output all floating point constants that cannot be printed accurately...
>> -void CWriter::printFloatingPointConstants(Function &F) {
>> -  // Scan the module for floating point constants.  If any FP constant is used
>> -  // in the function, we want to redirect it here so that we do not depend on
>> -  // the precision of the printed form, unless the printed form preserves
>> -  // precision.
>> -  //
>> -  for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
>> -       I != E; ++I)
>> -    printFloatingPointConstants(*I);
>> -
>> -  Out << '\n';
>> -}
>> -
>> -void CWriter::printFloatingPointConstants(const Constant *C) {
>> -  // If this is a constant expression, recursively check for constant fp values.
>> -  if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
>> -    for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
>> -      printFloatingPointConstants(CE->getOperand(i));
>> -    return;
>> -  }
>> -
>> -  // Otherwise, check for a FP constant that we need to print.
>> -  const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
>> -  if (FPC == 0 ||
>> -      // Do not put in FPConstantMap if safe.
>> -      isFPCSafeToPrint(FPC) ||
>> -      // Already printed this constant?
>> -      FPConstantMap.count(FPC))
>> -    return;
>> -
>> -  FPConstantMap[FPC] = FPCounter;  // Number the FP constants
>> -
>> -  if (FPC->getType() == Type::getDoubleTy(FPC->getContext())) {
>> -    double Val = FPC->getValueAPF().convertToDouble();
>> -    uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
>> -    Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
>> -    << " = 0x" << utohexstr(i)
>> -    << "ULL;    /* " << Val << " */\n";
>> -  } else if (FPC->getType() == Type::getFloatTy(FPC->getContext())) {
>> -    float Val = FPC->getValueAPF().convertToFloat();
>> -    uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
>> -    getZExtValue();
>> -    Out << "static const ConstantFloatTy FPConstant" << FPCounter++
>> -    << " = 0x" << utohexstr(i)
>> -    << "U;    /* " << Val << " */\n";
>> -  } else if (FPC->getType() == Type::getX86_FP80Ty(FPC->getContext())) {
>> -    // api needed to prevent premature destruction
>> -    APInt api = FPC->getValueAPF().bitcastToAPInt();
>> -    const uint64_t *p = api.getRawData();
>> -    Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
>> -    << " = { 0x" << utohexstr(p[0])
>> -    << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
>> -    << "}; /* Long double constant */\n";
>> -  } else if (FPC->getType() == Type::getPPC_FP128Ty(FPC->getContext()) ||
>> -             FPC->getType() == Type::getFP128Ty(FPC->getContext())) {
>> -    APInt api = FPC->getValueAPF().bitcastToAPInt();
>> -    const uint64_t *p = api.getRawData();
>> -    Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
>> -    << " = { 0x"
>> -    << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
>> -    << "}; /* Long double constant */\n";
>> -
>> -  } else {
>> -    llvm_unreachable("Unknown float type!");
>> -  }
>> -}
>> -
>> -
>> -/// printSymbolTable - Run through symbol table looking for type names.  If a
>> -/// type name is found, emit its declaration...
>> -///
>> -void CWriter::printModuleTypes() {
>> -  Out << "/* Helper union for bitcasts */\n";
>> -  Out << "typedef union {\n";
>> -  Out << "  unsigned int Int32;\n";
>> -  Out << "  unsigned long long Int64;\n";
>> -  Out << "  float Float;\n";
>> -  Out << "  double Double;\n";
>> -  Out << "} llvmBitCastUnion;\n";
>> -
>> -  // Get all of the struct types used in the module.
>> -  std::vector<StructType*> StructTypes;
>> -  TheModule->findUsedStructTypes(StructTypes);
>> -
>> -  if (StructTypes.empty()) return;
>> -
>> -  Out << "/* Structure forward decls */\n";
>> -
>> -  unsigned NextTypeID = 0;
>> -
>> -  // If any of them are missing names, add a unique ID to UnnamedStructIDs.
>> -  // Print out forward declarations for structure types.
>> -  for (unsigned i = 0, e = StructTypes.size(); i != e; ++i) {
>> -    StructType *ST = StructTypes[i];
>> -
>> -    if (ST->isLiteral() || ST->getName().empty())
>> -      UnnamedStructIDs[ST] = NextTypeID++;
>> -
>> -    std::string Name = getStructName(ST);
>> -
>> -    Out << "typedef struct " << Name << ' ' << Name << ";\n";
>> -  }
>> -
>> -  Out << '\n';
>> -
>> -  // Keep track of which structures have been printed so far.
>> -  SmallPtrSet<Type *, 16> StructPrinted;
>> -
>> -  // Loop over all structures then push them into the stack so they are
>> -  // printed in the correct order.
>> -  //
>> -  Out << "/* Structure contents */\n";
>> -  for (unsigned i = 0, e = StructTypes.size(); i != e; ++i)
>> -    if (StructTypes[i]->isStructTy())
>> -      // Only print out used types!
>> -      printContainedStructs(StructTypes[i], StructPrinted);
>> -}
>> -
>> -// Push the struct onto the stack and recursively push all structs
>> -// this one depends on.
>> -//
>> -// TODO:  Make this work properly with vector types
>> -//
>> -void CWriter::printContainedStructs(Type *Ty,
>> -                                SmallPtrSet<Type *, 16> &StructPrinted) {
>> -  // Don't walk through pointers.
>> -  if (Ty->isPointerTy() || Ty->isPrimitiveType() || Ty->isIntegerTy())
>> -    return;
>> -
>> -  // Print all contained types first.
>> -  for (Type::subtype_iterator I = Ty->subtype_begin(),
>> -       E = Ty->subtype_end(); I != E; ++I)
>> -    printContainedStructs(*I, StructPrinted);
>> -
>> -  if (StructType *ST = dyn_cast<StructType>(Ty)) {
>> -    // Check to see if we have already printed this struct.
>> -    if (!StructPrinted.insert(Ty)) return;
>> -
>> -    // Print structure type out.
>> -    printType(Out, ST, false, getStructName(ST), true);
>> -    Out << ";\n\n";
>> -  }
>> -}
>> -
>> -void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
>> -  /// isStructReturn - Should this function actually return a struct by-value?
>> -  bool isStructReturn = F->hasStructRetAttr();
>> -
>> -  if (F->hasLocalLinkage()) Out << "static ";
>> -  if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
>> -  if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
>> -  switch (F->getCallingConv()) {
>> -   case CallingConv::X86_StdCall:
>> -    Out << "__attribute__((stdcall)) ";
>> -    break;
>> -   case CallingConv::X86_FastCall:
>> -    Out << "__attribute__((fastcall)) ";
>> -    break;
>> -   case CallingConv::X86_ThisCall:
>> -    Out << "__attribute__((thiscall)) ";
>> -    break;
>> -   default:
>> -    break;
>> -  }
>> -
>> -  // Loop over the arguments, printing them...
>> -  FunctionType *FT = cast<FunctionType>(F->getFunctionType());
>> -  const AttrListPtr &PAL = F->getAttributes();
>> -
>> -  std::string tstr;
>> -  raw_string_ostream FunctionInnards(tstr);
>> -
>> -  // Print out the name...
>> -  FunctionInnards << GetValueName(F) << '(';
>> -
>> -  bool PrintedArg = false;
>> -  if (!F->isDeclaration()) {
>> -    if (!F->arg_empty()) {
>> -      Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
>> -      unsigned Idx = 1;
>> -
>> -      // If this is a struct-return function, don't print the hidden
>> -      // struct-return argument.
>> -      if (isStructReturn) {
>> -        assert(I != E && "Invalid struct return function!");
>> -        ++I;
>> -        ++Idx;
>> -      }
>> -
>> -      std::string ArgName;
>> -      for (; I != E; ++I) {
>> -        if (PrintedArg) FunctionInnards << ", ";
>> -        if (I->hasName() || !Prototype)
>> -          ArgName = GetValueName(I);
>> -        else
>> -          ArgName = "";
>> -        Type *ArgTy = I->getType();
>> -        if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
>> -          ArgTy = cast<PointerType>(ArgTy)->getElementType();
>> -          ByValParams.insert(I);
>> -        }
>> -        printType(FunctionInnards, ArgTy,
>> -            /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
>> -            ArgName);
>> -        PrintedArg = true;
>> -        ++Idx;
>> -      }
>> -    }
>> -  } else {
>> -    // Loop over the arguments, printing them.
>> -    FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
>> -    unsigned Idx = 1;
>> -
>> -    // If this is a struct-return function, don't print the hidden
>> -    // struct-return argument.
>> -    if (isStructReturn) {
>> -      assert(I != E && "Invalid struct return function!");
>> -      ++I;
>> -      ++Idx;
>> -    }
>> -
>> -    for (; I != E; ++I) {
>> -      if (PrintedArg) FunctionInnards << ", ";
>> -      Type *ArgTy = *I;
>> -      if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
>> -        assert(ArgTy->isPointerTy());
>> -        ArgTy = cast<PointerType>(ArgTy)->getElementType();
>> -      }
>> -      printType(FunctionInnards, ArgTy,
>> -             /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
>> -      PrintedArg = true;
>> -      ++Idx;
>> -    }
>> -  }
>> -
>> -  if (!PrintedArg && FT->isVarArg()) {
>> -    FunctionInnards << "int vararg_dummy_arg";
>> -    PrintedArg = true;
>> -  }
>> -
>> -  // Finish printing arguments... if this is a vararg function, print the ...,
>> -  // unless there are no known types, in which case, we just emit ().
>> -  //
>> -  if (FT->isVarArg() && PrintedArg) {
>> -    FunctionInnards << ",...";  // Output varargs portion of signature!
>> -  } else if (!FT->isVarArg() && !PrintedArg) {
>> -    FunctionInnards << "void"; // ret() -> ret(void) in C.
>> -  }
>> -  FunctionInnards << ')';
>> -
>> -  // Get the return tpe for the function.
>> -  Type *RetTy;
>> -  if (!isStructReturn)
>> -    RetTy = F->getReturnType();
>> -  else {
>> -    // If this is a struct-return function, print the struct-return type.
>> -    RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
>> -  }
>> -
>> -  // Print out the return type and the signature built above.
>> -  printType(Out, RetTy,
>> -            /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
>> -            FunctionInnards.str());
>> -}
>> -
>> -static inline bool isFPIntBitCast(const Instruction &I) {
>> -  if (!isa<BitCastInst>(I))
>> -    return false;
>> -  Type *SrcTy = I.getOperand(0)->getType();
>> -  Type *DstTy = I.getType();
>> -  return (SrcTy->isFloatingPointTy() && DstTy->isIntegerTy()) ||
>> -         (DstTy->isFloatingPointTy() && SrcTy->isIntegerTy());
>> -}
>> -
>> -void CWriter::printFunction(Function &F) {
>> -  /// isStructReturn - Should this function actually return a struct by-value?
>> -  bool isStructReturn = F.hasStructRetAttr();
>> -
>> -  printFunctionSignature(&F, false);
>> -  Out << " {\n";
>> -
>> -  // If this is a struct return function, handle the result with magic.
>> -  if (isStructReturn) {
>> -    Type *StructTy =
>> -      cast<PointerType>(F.arg_begin()->getType())->getElementType();
>> -    Out << "  ";
>> -    printType(Out, StructTy, false, "StructReturn");
>> -    Out << ";  /* Struct return temporary */\n";
>> -
>> -    Out << "  ";
>> -    printType(Out, F.arg_begin()->getType(), false,
>> -              GetValueName(F.arg_begin()));
>> -    Out << " = &StructReturn;\n";
>> -  }
>> -
>> -  bool PrintedVar = false;
>> -
>> -  // print local variable information for the function
>> -  for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
>> -    if (const AllocaInst *AI = isDirectAlloca(&*I)) {
>> -      Out << "  ";
>> -      printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
>> -      Out << ";    /* Address-exposed local */\n";
>> -      PrintedVar = true;
>> -    } else if (I->getType() != Type::getVoidTy(F.getContext()) &&
>> -               !isInlinableInst(*I)) {
>> -      Out << "  ";
>> -      printType(Out, I->getType(), false, GetValueName(&*I));
>> -      Out << ";\n";
>> -
>> -      if (isa<PHINode>(*I)) {  // Print out PHI node temporaries as well...
>> -        Out << "  ";
>> -        printType(Out, I->getType(), false,
>> -                  GetValueName(&*I)+"__PHI_TEMPORARY");
>> -        Out << ";\n";
>> -      }
>> -      PrintedVar = true;
>> -    }
>> -    // We need a temporary for the BitCast to use so it can pluck a value out
>> -    // of a union to do the BitCast. This is separate from the need for a
>> -    // variable to hold the result of the BitCast.
>> -    if (isFPIntBitCast(*I)) {
>> -      Out << "  llvmBitCastUnion " << GetValueName(&*I)
>> -          << "__BITCAST_TEMPORARY;\n";
>> -      PrintedVar = true;
>> -    }
>> -  }
>> -
>> -  if (PrintedVar)
>> -    Out << '\n';
>> -
>> -  if (F.hasExternalLinkage() && F.getName() == "main")
>> -    Out << "  CODE_FOR_MAIN();\n";
>> -
>> -  // print the basic blocks
>> -  for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
>> -    if (Loop *L = LI->getLoopFor(BB)) {
>> -      if (L->getHeader() == BB && L->getParentLoop() == 0)
>> -        printLoop(L);
>> -    } else {
>> -      printBasicBlock(BB);
>> -    }
>> -  }
>> -
>> -  Out << "}\n\n";
>> -}
>> -
>> -void CWriter::printLoop(Loop *L) {
>> -  Out << "  do {     /* Syntactic loop '" << L->getHeader()->getName()
>> -      << "' to make GCC happy */\n";
>> -  for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
>> -    BasicBlock *BB = L->getBlocks()[i];
>> -    Loop *BBLoop = LI->getLoopFor(BB);
>> -    if (BBLoop == L)
>> -      printBasicBlock(BB);
>> -    else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
>> -      printLoop(BBLoop);
>> -  }
>> -  Out << "  } while (1); /* end of syntactic loop '"
>> -      << L->getHeader()->getName() << "' */\n";
>> -}
>> -
>> -void CWriter::printBasicBlock(BasicBlock *BB) {
>> -
>> -  // Don't print the label for the basic block if there are no uses, or if
>> -  // the only terminator use is the predecessor basic block's terminator.
>> -  // We have to scan the use list because PHI nodes use basic blocks too but
>> -  // do not require a label to be generated.
>> -  //
>> -  bool NeedsLabel = false;
>> -  for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
>> -    if (isGotoCodeNecessary(*PI, BB)) {
>> -      NeedsLabel = true;
>> -      break;
>> -    }
>> -
>> -  if (NeedsLabel) Out << GetValueName(BB) << ":\n";
>> -
>> -  // Output all of the instructions in the basic block...
>> -  for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
>> -       ++II) {
>> -    if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
>> -      if (II->getType() != Type::getVoidTy(BB->getContext()) &&
>> -          !isInlineAsm(*II))
>> -        outputLValue(II);
>> -      else
>> -        Out << "  ";
>> -      writeInstComputationInline(*II);
>> -      Out << ";\n";
>> -    }
>> -  }
>> -
>> -  // Don't emit prefix or suffix for the terminator.
>> -  visit(*BB->getTerminator());
>> -}
>> -
>> -
>> -// Specific Instruction type classes... note that all of the casts are
>> -// necessary because we use the instruction classes as opaque types...
>> -//
>> -void CWriter::visitReturnInst(ReturnInst &I) {
>> -  // If this is a struct return function, return the temporary struct.
>> -  bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
>> -
>> -  if (isStructReturn) {
>> -    Out << "  return StructReturn;\n";
>> -    return;
>> -  }
>> -
>> -  // Don't output a void return if this is the last basic block in the function
>> -  if (I.getNumOperands() == 0 &&
>> -      &*--I.getParent()->getParent()->end() == I.getParent() &&
>> -      !I.getParent()->size() == 1) {
>> -    return;
>> -  }
>> -
>> -  Out << "  return";
>> -  if (I.getNumOperands()) {
>> -    Out << ' ';
>> -    writeOperand(I.getOperand(0));
>> -  }
>> -  Out << ";\n";
>> -}
>> -
>> -void CWriter::visitSwitchInst(SwitchInst &SI) {
>> -
>> -  Value* Cond = SI.getCondition();
>> -
>> -  Out << "  switch (";
>> -  writeOperand(Cond);
>> -  Out << ") {\n  default:\n";
>> -  printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
>> -  printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
>> -  Out << ";\n";
>> -
>> -  // Skip the first item since that's the default case.
>> -  for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
>> -    ConstantInt* CaseVal = i.getCaseValue();
>> -    BasicBlock* Succ = i.getCaseSuccessor();
>> -    Out << "  case ";
>> -    writeOperand(CaseVal);
>> -    Out << ":\n";
>> -    printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
>> -    printBranchToBlock(SI.getParent(), Succ, 2);
>> -    if (Function::iterator(Succ) ==
>> -        llvm::next(Function::iterator(SI.getParent())))
>> -      Out << "    break;\n";
>> -  }
>> -
>> -  Out << "  }\n";
>> -}
>> -
>> -void CWriter::visitIndirectBrInst(IndirectBrInst &IBI) {
>> -  Out << "  goto *(void*)(";
>> -  writeOperand(IBI.getOperand(0));
>> -  Out << ");\n";
>> -}
>> -
>> -void CWriter::visitUnreachableInst(UnreachableInst &I) {
>> -  Out << "  /*UNREACHABLE*/;\n";
>> -}
>> -
>> -bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
>> -  /// FIXME: This should be reenabled, but loop reordering safe!!
>> -  return true;
>> -
>> -  if (llvm::next(Function::iterator(From)) != Function::iterator(To))
>> -    return true;  // Not the direct successor, we need a goto.
>> -
>> -  //isa<SwitchInst>(From->getTerminator())
>> -
>> -  if (LI->getLoopFor(From) != LI->getLoopFor(To))
>> -    return true;
>> -  return false;
>> -}
>> -
>> -void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
>> -                                          BasicBlock *Successor,
>> -                                          unsigned Indent) {
>> -  for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
>> -    PHINode *PN = cast<PHINode>(I);
>> -    // Now we have to do the printing.
>> -    Value *IV = PN->getIncomingValueForBlock(CurBlock);
>> -    if (!isa<UndefValue>(IV)) {
>> -      Out << std::string(Indent, ' ');
>> -      Out << "  " << GetValueName(I) << "__PHI_TEMPORARY = ";
>> -      writeOperand(IV);
>> -      Out << ";   /* for PHI node */\n";
>> -    }
>> -  }
>> -}
>> -
>> -void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
>> -                                 unsigned Indent) {
>> -  if (isGotoCodeNecessary(CurBB, Succ)) {
>> -    Out << std::string(Indent, ' ') << "  goto ";
>> -    writeOperand(Succ);
>> -    Out << ";\n";
>> -  }
>> -}
>> -
>> -// Branch instruction printing - Avoid printing out a branch to a basic block
>> -// that immediately succeeds the current one.
>> -//
>> -void CWriter::visitBranchInst(BranchInst &I) {
>> -
>> -  if (I.isConditional()) {
>> -    if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
>> -      Out << "  if (";
>> -      writeOperand(I.getCondition());
>> -      Out << ") {\n";
>> -
>> -      printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
>> -      printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
>> -
>> -      if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
>> -        Out << "  } else {\n";
>> -        printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
>> -        printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
>> -      }
>> -    } else {
>> -      // First goto not necessary, assume second one is...
>> -      Out << "  if (!";
>> -      writeOperand(I.getCondition());
>> -      Out << ") {\n";
>> -
>> -      printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
>> -      printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
>> -    }
>> -
>> -    Out << "  }\n";
>> -  } else {
>> -    printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
>> -    printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
>> -  }
>> -  Out << "\n";
>> -}
>> -
>> -// PHI nodes get copied into temporary values at the end of predecessor basic
>> -// blocks.  We now need to copy these temporary values into the REAL value for
>> -// the PHI.
>> -void CWriter::visitPHINode(PHINode &I) {
>> -  writeOperand(&I);
>> -  Out << "__PHI_TEMPORARY";
>> -}
>> -
>> -
>> -void CWriter::visitBinaryOperator(Instruction &I) {
>> -  // binary instructions, shift instructions, setCond instructions.
>> -  assert(!I.getType()->isPointerTy());
>> -
>> -  // We must cast the results of binary operations which might be promoted.
>> -  bool needsCast = false;
>> -  if ((I.getType() == Type::getInt8Ty(I.getContext())) ||
>> -      (I.getType() == Type::getInt16Ty(I.getContext()))
>> -      || (I.getType() == Type::getFloatTy(I.getContext()))) {
>> -    needsCast = true;
>> -    Out << "((";
>> -    printType(Out, I.getType(), false);
>> -    Out << ")(";
>> -  }
>> -
>> -  // If this is a negation operation, print it out as such.  For FP, we don't
>> -  // want to print "-0.0 - X".
>> -  if (BinaryOperator::isNeg(&I)) {
>> -    Out << "-(";
>> -    writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
>> -    Out << ")";
>> -  } else if (BinaryOperator::isFNeg(&I)) {
>> -    Out << "-(";
>> -    writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
>> -    Out << ")";
>> -  } else if (I.getOpcode() == Instruction::FRem) {
>> -    // Output a call to fmod/fmodf instead of emitting a%b
>> -    if (I.getType() == Type::getFloatTy(I.getContext()))
>> -      Out << "fmodf(";
>> -    else if (I.getType() == Type::getDoubleTy(I.getContext()))
>> -      Out << "fmod(";
>> -    else  // all 3 flavors of long double
>> -      Out << "fmodl(";
>> -    writeOperand(I.getOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getOperand(1));
>> -    Out << ")";
>> -  } else {
>> -
>> -    // Write out the cast of the instruction's value back to the proper type
>> -    // if necessary.
>> -    bool NeedsClosingParens = writeInstructionCast(I);
>> -
>> -    // Certain instructions require the operand to be forced to a specific type
>> -    // so we use writeOperandWithCast here instead of writeOperand. Similarly
>> -    // below for operand 1
>> -    writeOperandWithCast(I.getOperand(0), I.getOpcode());
>> -
>> -    switch (I.getOpcode()) {
>> -    case Instruction::Add:
>> -    case Instruction::FAdd: Out << " + "; break;
>> -    case Instruction::Sub:
>> -    case Instruction::FSub: Out << " - "; break;
>> -    case Instruction::Mul:
>> -    case Instruction::FMul: Out << " * "; break;
>> -    case Instruction::URem:
>> -    case Instruction::SRem:
>> -    case Instruction::FRem: Out << " % "; break;
>> -    case Instruction::UDiv:
>> -    case Instruction::SDiv:
>> -    case Instruction::FDiv: Out << " / "; break;
>> -    case Instruction::And:  Out << " & "; break;
>> -    case Instruction::Or:   Out << " | "; break;
>> -    case Instruction::Xor:  Out << " ^ "; break;
>> -    case Instruction::Shl : Out << " << "; break;
>> -    case Instruction::LShr:
>> -    case Instruction::AShr: Out << " >> "; break;
>> -    default:
>> -#ifndef NDEBUG
>> -       errs() << "Invalid operator type!" << I;
>> -#endif
>> -       llvm_unreachable(0);
>> -    }
>> -
>> -    writeOperandWithCast(I.getOperand(1), I.getOpcode());
>> -    if (NeedsClosingParens)
>> -      Out << "))";
>> -  }
>> -
>> -  if (needsCast) {
>> -    Out << "))";
>> -  }
>> -}
>> -
>> -void CWriter::visitICmpInst(ICmpInst &I) {
>> -  // We must cast the results of icmp which might be promoted.
>> -  bool needsCast = false;
>> -
>> -  // Write out the cast of the instruction's value back to the proper type
>> -  // if necessary.
>> -  bool NeedsClosingParens = writeInstructionCast(I);
>> -
>> -  // Certain icmp predicate require the operand to be forced to a specific type
>> -  // so we use writeOperandWithCast here instead of writeOperand. Similarly
>> -  // below for operand 1
>> -  writeOperandWithCast(I.getOperand(0), I);
>> -
>> -  switch (I.getPredicate()) {
>> -  case ICmpInst::ICMP_EQ:  Out << " == "; break;
>> -  case ICmpInst::ICMP_NE:  Out << " != "; break;
>> -  case ICmpInst::ICMP_ULE:
>> -  case ICmpInst::ICMP_SLE: Out << " <= "; break;
>> -  case ICmpInst::ICMP_UGE:
>> -  case ICmpInst::ICMP_SGE: Out << " >= "; break;
>> -  case ICmpInst::ICMP_ULT:
>> -  case ICmpInst::ICMP_SLT: Out << " < "; break;
>> -  case ICmpInst::ICMP_UGT:
>> -  case ICmpInst::ICMP_SGT: Out << " > "; break;
>> -  default:
>> -#ifndef NDEBUG
>> -    errs() << "Invalid icmp predicate!" << I;
>> -#endif
>> -    llvm_unreachable(0);
>> -  }
>> -
>> -  writeOperandWithCast(I.getOperand(1), I);
>> -  if (NeedsClosingParens)
>> -    Out << "))";
>> -
>> -  if (needsCast) {
>> -    Out << "))";
>> -  }
>> -}
>> -
>> -void CWriter::visitFCmpInst(FCmpInst &I) {
>> -  if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
>> -    Out << "0";
>> -    return;
>> -  }
>> -  if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
>> -    Out << "1";
>> -    return;
>> -  }
>> -
>> -  const char* op = 0;
>> -  switch (I.getPredicate()) {
>> -  default: llvm_unreachable("Illegal FCmp predicate");
>> -  case FCmpInst::FCMP_ORD: op = "ord"; break;
>> -  case FCmpInst::FCMP_UNO: op = "uno"; break;
>> -  case FCmpInst::FCMP_UEQ: op = "ueq"; break;
>> -  case FCmpInst::FCMP_UNE: op = "une"; break;
>> -  case FCmpInst::FCMP_ULT: op = "ult"; break;
>> -  case FCmpInst::FCMP_ULE: op = "ule"; break;
>> -  case FCmpInst::FCMP_UGT: op = "ugt"; break;
>> -  case FCmpInst::FCMP_UGE: op = "uge"; break;
>> -  case FCmpInst::FCMP_OEQ: op = "oeq"; break;
>> -  case FCmpInst::FCMP_ONE: op = "one"; break;
>> -  case FCmpInst::FCMP_OLT: op = "olt"; break;
>> -  case FCmpInst::FCMP_OLE: op = "ole"; break;
>> -  case FCmpInst::FCMP_OGT: op = "ogt"; break;
>> -  case FCmpInst::FCMP_OGE: op = "oge"; break;
>> -  }
>> -
>> -  Out << "llvm_fcmp_" << op << "(";
>> -  // Write the first operand
>> -  writeOperand(I.getOperand(0));
>> -  Out << ", ";
>> -  // Write the second operand
>> -  writeOperand(I.getOperand(1));
>> -  Out << ")";
>> -}
>> -
>> -static const char * getFloatBitCastField(Type *Ty) {
>> -  switch (Ty->getTypeID()) {
>> -    default: llvm_unreachable("Invalid Type");
>> -    case Type::FloatTyID:  return "Float";
>> -    case Type::DoubleTyID: return "Double";
>> -    case Type::IntegerTyID: {
>> -      unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
>> -      if (NumBits <= 32)
>> -        return "Int32";
>> -      else
>> -        return "Int64";
>> -    }
>> -  }
>> -}
>> -
>> -void CWriter::visitCastInst(CastInst &I) {
>> -  Type *DstTy = I.getType();
>> -  Type *SrcTy = I.getOperand(0)->getType();
>> -  if (isFPIntBitCast(I)) {
>> -    Out << '(';
>> -    // These int<->float and long<->double casts need to be handled specially
>> -    Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
>> -        << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
>> -    writeOperand(I.getOperand(0));
>> -    Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
>> -        << getFloatBitCastField(I.getType());
>> -    Out << ')';
>> -    return;
>> -  }
>> -
>> -  Out << '(';
>> -  printCast(I.getOpcode(), SrcTy, DstTy);
>> -
>> -  // Make a sext from i1 work by subtracting the i1 from 0 (an int).
>> -  if (SrcTy == Type::getInt1Ty(I.getContext()) &&
>> -      I.getOpcode() == Instruction::SExt)
>> -    Out << "0-";
>> -
>> -  writeOperand(I.getOperand(0));
>> -
>> -  if (DstTy == Type::getInt1Ty(I.getContext()) &&
>> -      (I.getOpcode() == Instruction::Trunc ||
>> -       I.getOpcode() == Instruction::FPToUI ||
>> -       I.getOpcode() == Instruction::FPToSI ||
>> -       I.getOpcode() == Instruction::PtrToInt)) {
>> -    // Make sure we really get a trunc to bool by anding the operand with 1
>> -    Out << "&1u";
>> -  }
>> -  Out << ')';
>> -}
>> -
>> -void CWriter::visitSelectInst(SelectInst &I) {
>> -  Out << "((";
>> -  writeOperand(I.getCondition());
>> -  Out << ") ? (";
>> -  writeOperand(I.getTrueValue());
>> -  Out << ") : (";
>> -  writeOperand(I.getFalseValue());
>> -  Out << "))";
>> -}
>> -
>> -// Returns the macro name or value of the max or min of an integer type
>> -// (as defined in limits.h).
>> -static void printLimitValue(IntegerType &Ty, bool isSigned, bool isMax,
>> -                            raw_ostream &Out) {
>> -  const char* type;
>> -  const char* sprefix = "";
>> -
>> -  unsigned NumBits = Ty.getBitWidth();
>> -  if (NumBits <= 8) {
>> -    type = "CHAR";
>> -    sprefix = "S";
>> -  } else if (NumBits <= 16) {
>> -    type = "SHRT";
>> -  } else if (NumBits <= 32) {
>> -    type = "INT";
>> -  } else if (NumBits <= 64) {
>> -    type = "LLONG";
>> -  } else {
>> -    llvm_unreachable("Bit widths > 64 not implemented yet");
>> -  }
>> -
>> -  if (isSigned)
>> -    Out << sprefix << type << (isMax ? "_MAX" : "_MIN");
>> -  else
>> -    Out << "U" << type << (isMax ? "_MAX" : "0");
>> -}
>> -
>> -#ifndef NDEBUG
>> -static bool isSupportedIntegerSize(IntegerType &T) {
>> -  return T.getBitWidth() == 8 || T.getBitWidth() == 16 ||
>> -         T.getBitWidth() == 32 || T.getBitWidth() == 64;
>> -}
>> -#endif
>> -
>> -void CWriter::printIntrinsicDefinition(const Function &F, raw_ostream &Out) {
>> -  FunctionType *funT = F.getFunctionType();
>> -  Type *retT = F.getReturnType();
>> -  IntegerType *elemT = cast<IntegerType>(funT->getParamType(1));
>> -
>> -  assert(isSupportedIntegerSize(*elemT) &&
>> -         "CBackend does not support arbitrary size integers.");
>> -  assert(cast<StructType>(retT)->getElementType(0) == elemT &&
>> -         elemT == funT->getParamType(0) && funT->getNumParams() == 2);
>> -
>> -  switch (F.getIntrinsicID()) {
>> -  default:
>> -    llvm_unreachable("Unsupported Intrinsic.");
>> -  case Intrinsic::uadd_with_overflow:
>> -    // static inline Rty uadd_ixx(unsigned ixx a, unsigned ixx b) {
>> -    //   Rty r;
>> -    //   r.field0 = a + b;
>> -    //   r.field1 = (r.field0 < a);
>> -    //   return r;
>> -    // }
>> -    Out << "static inline ";
>> -    printType(Out, retT);
>> -    Out << GetValueName(&F);
>> -    Out << "(";
>> -    printSimpleType(Out, elemT, false);
>> -    Out << "a,";
>> -    printSimpleType(Out, elemT, false);
>> -    Out << "b) {\n  ";
>> -    printType(Out, retT);
>> -    Out << "r;\n";
>> -    Out << "  r.field0 = a + b;\n";
>> -    Out << "  r.field1 = (r.field0 < a);\n";
>> -    Out << "  return r;\n}\n";
>> -    break;
>> -
>> -  case Intrinsic::sadd_with_overflow:
>> -    // static inline Rty sadd_ixx(ixx a, ixx b) {
>> -    //   Rty r;
>> -    //   r.field1 = (b > 0 && a > XX_MAX - b) ||
>> -    //              (b < 0 && a < XX_MIN - b);
>> -    //   r.field0 = r.field1 ? 0 : a + b;
>> -    //   return r;
>> -    // }
>> -    Out << "static ";
>> -    printType(Out, retT);
>> -    Out << GetValueName(&F);
>> -    Out << "(";
>> -    printSimpleType(Out, elemT, true);
>> -    Out << "a,";
>> -    printSimpleType(Out, elemT, true);
>> -    Out << "b) {\n  ";
>> -    printType(Out, retT);
>> -    Out << "r;\n";
>> -    Out << "  r.field1 = (b > 0 && a > ";
>> -    printLimitValue(*elemT, true, true, Out);
>> -    Out << " - b) || (b < 0 && a < ";
>> -    printLimitValue(*elemT, true, false, Out);
>> -    Out << " - b);\n";
>> -    Out << "  r.field0 = r.field1 ? 0 : a + b;\n";
>> -    Out << "  return r;\n}\n";
>> -    break;
>> -  }
>> -}
>> -
>> -void CWriter::lowerIntrinsics(Function &F) {
>> -  // This is used to keep track of intrinsics that get generated to a lowered
>> -  // function. We must generate the prototypes before the function body which
>> -  // will only be expanded on first use (by the loop below).
>> -  std::vector<Function*> prototypesToGen;
>> -
>> -  // Examine all the instructions in this function to find the intrinsics that
>> -  // need to be lowered.
>> -  for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
>> -    for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
>> -      if (CallInst *CI = dyn_cast<CallInst>(I++))
>> -        if (Function *F = CI->getCalledFunction())
>> -          switch (F->getIntrinsicID()) {
>> -          case Intrinsic::not_intrinsic:
>> -          case Intrinsic::vastart:
>> -          case Intrinsic::vacopy:
>> -          case Intrinsic::vaend:
>> -          case Intrinsic::returnaddress:
>> -          case Intrinsic::frameaddress:
>> -          case Intrinsic::setjmp:
>> -          case Intrinsic::longjmp:
>> -          case Intrinsic::prefetch:
>> -          case Intrinsic::powi:
>> -          case Intrinsic::x86_sse_cmp_ss:
>> -          case Intrinsic::x86_sse_cmp_ps:
>> -          case Intrinsic::x86_sse2_cmp_sd:
>> -          case Intrinsic::x86_sse2_cmp_pd:
>> -          case Intrinsic::ppc_altivec_lvsl:
>> -          case Intrinsic::uadd_with_overflow:
>> -          case Intrinsic::sadd_with_overflow:
>> -              // We directly implement these intrinsics
>> -            break;
>> -          default:
>> -            // If this is an intrinsic that directly corresponds to a GCC
>> -            // builtin, we handle it.
>> -            const char *BuiltinName = "";
>> -#define GET_GCC_BUILTIN_NAME
>> -#include "llvm/Intrinsics.gen"
>> -#undef GET_GCC_BUILTIN_NAME
>> -            // If we handle it, don't lower it.
>> -            if (BuiltinName[0]) break;
>> -
>> -            // All other intrinsic calls we must lower.
>> -            Instruction *Before = 0;
>> -            if (CI != &BB->front())
>> -              Before = prior(BasicBlock::iterator(CI));
>> -
>> -            IL->LowerIntrinsicCall(CI);
>> -            if (Before) {        // Move iterator to instruction after call
>> -              I = Before; ++I;
>> -            } else {
>> -              I = BB->begin();
>> -            }
>> -            // If the intrinsic got lowered to another call, and that call has
>> -            // a definition then we need to make sure its prototype is emitted
>> -            // before any calls to it.
>> -            if (CallInst *Call = dyn_cast<CallInst>(I))
>> -              if (Function *NewF = Call->getCalledFunction())
>> -                if (!NewF->isDeclaration())
>> -                  prototypesToGen.push_back(NewF);
>> -
>> -            break;
>> -          }
>> -
>> -  // We may have collected some prototypes to emit in the loop above.
>> -  // Emit them now, before the function that uses them is emitted. But,
>> -  // be careful not to emit them twice.
>> -  std::vector<Function*>::iterator I = prototypesToGen.begin();
>> -  std::vector<Function*>::iterator E = prototypesToGen.end();
>> -  for ( ; I != E; ++I) {
>> -    if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
>> -      Out << '\n';
>> -      printFunctionSignature(*I, true);
>> -      Out << ";\n";
>> -    }
>> -  }
>> -}
>> -
>> -void CWriter::visitCallInst(CallInst &I) {
>> -  if (isa<InlineAsm>(I.getCalledValue()))
>> -    return visitInlineAsm(I);
>> -
>> -  bool WroteCallee = false;
>> -
>> -  // Handle intrinsic function calls first...
>> -  if (Function *F = I.getCalledFunction())
>> -    if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
>> -      if (visitBuiltinCall(I, ID, WroteCallee))
>> -        return;
>> -
>> -  Value *Callee = I.getCalledValue();
>> -
>> -  PointerType  *PTy   = cast<PointerType>(Callee->getType());
>> -  FunctionType *FTy   = cast<FunctionType>(PTy->getElementType());
>> -
>> -  // If this is a call to a struct-return function, assign to the first
>> -  // parameter instead of passing it to the call.
>> -  const AttrListPtr &PAL = I.getAttributes();
>> -  bool hasByVal = I.hasByValArgument();
>> -  bool isStructRet = I.hasStructRetAttr();
>> -  if (isStructRet) {
>> -    writeOperandDeref(I.getArgOperand(0));
>> -    Out << " = ";
>> -  }
>> -
>> -  if (I.isTailCall()) Out << " /*tail*/ ";
>> -
>> -  if (!WroteCallee) {
>> -    // If this is an indirect call to a struct return function, we need to cast
>> -    // the pointer. Ditto for indirect calls with byval arguments.
>> -    bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
>> -
>> -    // GCC is a real PITA.  It does not permit codegening casts of functions to
>> -    // function pointers if they are in a call (it generates a trap instruction
>> -    // instead!).  We work around this by inserting a cast to void* in between
>> -    // the function and the function pointer cast.  Unfortunately, we can't just
>> -    // form the constant expression here, because the folder will immediately
>> -    // nuke it.
>> -    //
>> -    // Note finally, that this is completely unsafe.  ANSI C does not guarantee
>> -    // that void* and function pointers have the same size. :( To deal with this
>> -    // in the common case, we handle casts where the number of arguments passed
>> -    // match exactly.
>> -    //
>> -    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
>> -      if (CE->isCast())
>> -        if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
>> -          NeedsCast = true;
>> -          Callee = RF;
>> -        }
>> -
>> -    if (NeedsCast) {
>> -      // Ok, just cast the pointer type.
>> -      Out << "((";
>> -      if (isStructRet)
>> -        printStructReturnPointerFunctionType(Out, PAL,
>> -                             cast<PointerType>(I.getCalledValue()->getType()));
>> -      else if (hasByVal)
>> -        printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
>> -      else
>> -        printType(Out, I.getCalledValue()->getType());
>> -      Out << ")(void*)";
>> -    }
>> -    writeOperand(Callee);
>> -    if (NeedsCast) Out << ')';
>> -  }
>> -
>> -  Out << '(';
>> -
>> -  bool PrintedArg = false;
>> -  if(FTy->isVarArg() && !FTy->getNumParams()) {
>> -    Out << "0 /*dummy arg*/";
>> -    PrintedArg = true;
>> -  }
>> -
>> -  unsigned NumDeclaredParams = FTy->getNumParams();
>> -  CallSite CS(&I);
>> -  CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
>> -  unsigned ArgNo = 0;
>> -  if (isStructRet) {   // Skip struct return argument.
>> -    ++AI;
>> -    ++ArgNo;
>> -  }
>> -
>> -
>> -  for (; AI != AE; ++AI, ++ArgNo) {
>> -    if (PrintedArg) Out << ", ";
>> -    if (ArgNo < NumDeclaredParams &&
>> -        (*AI)->getType() != FTy->getParamType(ArgNo)) {
>> -      Out << '(';
>> -      printType(Out, FTy->getParamType(ArgNo),
>> -            /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
>> -      Out << ')';
>> -    }
>> -    // Check if the argument is expected to be passed by value.
>> -    if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
>> -      writeOperandDeref(*AI);
>> -    else
>> -      writeOperand(*AI);
>> -    PrintedArg = true;
>> -  }
>> -  Out << ')';
>> -}
>> -
>> -/// visitBuiltinCall - Handle the call to the specified builtin.  Returns true
>> -/// if the entire call is handled, return false if it wasn't handled, and
>> -/// optionally set 'WroteCallee' if the callee has already been printed out.
>> -bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
>> -                               bool &WroteCallee) {
>> -  switch (ID) {
>> -  default: {
>> -    // If this is an intrinsic that directly corresponds to a GCC
>> -    // builtin, we emit it here.
>> -    const char *BuiltinName = "";
>> -    Function *F = I.getCalledFunction();
>> -#define GET_GCC_BUILTIN_NAME
>> -#include "llvm/Intrinsics.gen"
>> -#undef GET_GCC_BUILTIN_NAME
>> -    assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
>> -
>> -    Out << BuiltinName;
>> -    WroteCallee = true;
>> -    return false;
>> -  }
>> -  case Intrinsic::vastart:
>> -    Out << "0; ";
>> -
>> -    Out << "va_start(*(va_list*)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    // Output the last argument to the enclosing function.
>> -    if (I.getParent()->getParent()->arg_empty())
>> -      Out << "vararg_dummy_arg";
>> -    else
>> -      writeOperand(--I.getParent()->getParent()->arg_end());
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::vaend:
>> -    if (!isa<ConstantPointerNull>(I.getArgOperand(0))) {
>> -      Out << "0; va_end(*(va_list*)";
>> -      writeOperand(I.getArgOperand(0));
>> -      Out << ')';
>> -    } else {
>> -      Out << "va_end(*(va_list*)0)";
>> -    }
>> -    return true;
>> -  case Intrinsic::vacopy:
>> -    Out << "0; ";
>> -    Out << "va_copy(*(va_list*)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", *(va_list*)";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::returnaddress:
>> -    Out << "__builtin_return_address(";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::frameaddress:
>> -    Out << "__builtin_frame_address(";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::powi:
>> -    Out << "__builtin_powi(";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::setjmp:
>> -    Out << "setjmp(*(jmp_buf*)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::longjmp:
>> -    Out << "longjmp(*(jmp_buf*)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ')';
>> -    return true;
>> -  case Intrinsic::prefetch:
>> -    Out << "LLVM_PREFETCH((const void *)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(2));
>> -    Out << ")";
>> -    return true;
>> -  case Intrinsic::stacksave:
>> -    // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
>> -    // to work around GCC bugs (see PR1809).
>> -    Out << "0; *((void**)&" << GetValueName(&I)
>> -        << ") = __builtin_stack_save()";
>> -    return true;
>> -  case Intrinsic::x86_sse_cmp_ss:
>> -  case Intrinsic::x86_sse_cmp_ps:
>> -  case Intrinsic::x86_sse2_cmp_sd:
>> -  case Intrinsic::x86_sse2_cmp_pd:
>> -    Out << '(';
>> -    printType(Out, I.getType());
>> -    Out << ')';
>> -    // Multiple GCC builtins multiplex onto this intrinsic.
>> -    switch (cast<ConstantInt>(I.getArgOperand(2))->getZExtValue()) {
>> -    default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
>> -    case 0: Out << "__builtin_ia32_cmpeq"; break;
>> -    case 1: Out << "__builtin_ia32_cmplt"; break;
>> -    case 2: Out << "__builtin_ia32_cmple"; break;
>> -    case 3: Out << "__builtin_ia32_cmpunord"; break;
>> -    case 4: Out << "__builtin_ia32_cmpneq"; break;
>> -    case 5: Out << "__builtin_ia32_cmpnlt"; break;
>> -    case 6: Out << "__builtin_ia32_cmpnle"; break;
>> -    case 7: Out << "__builtin_ia32_cmpord"; break;
>> -    }
>> -    if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
>> -      Out << 'p';
>> -    else
>> -      Out << 's';
>> -    if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
>> -      Out << 's';
>> -    else
>> -      Out << 'd';
>> -
>> -    Out << "(";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ")";
>> -    return true;
>> -  case Intrinsic::ppc_altivec_lvsl:
>> -    Out << '(';
>> -    printType(Out, I.getType());
>> -    Out << ')';
>> -    Out << "__builtin_altivec_lvsl(0, (void*)";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ")";
>> -    return true;
>> -  case Intrinsic::uadd_with_overflow:
>> -  case Intrinsic::sadd_with_overflow:
>> -    Out << GetValueName(I.getCalledFunction()) << "(";
>> -    writeOperand(I.getArgOperand(0));
>> -    Out << ", ";
>> -    writeOperand(I.getArgOperand(1));
>> -    Out << ")";
>> -    return true;
>> -  }
>> -}
>> -
>> -//This converts the llvm constraint string to something gcc is expecting.
>> -//TODO: work out platform independent constraints and factor those out
>> -//      of the per target tables
>> -//      handle multiple constraint codes
>> -std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
>> -  assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
>> -
>> -  // Grab the translation table from MCAsmInfo if it exists.
>> -  const MCAsmInfo *TargetAsm;
>> -  std::string Triple = TheModule->getTargetTriple();
>> -  if (Triple.empty())
>> -    Triple = llvm::sys::getDefaultTargetTriple();
>> -
>> -  std::string E;
>> -  if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
>> -    TargetAsm = Match->createMCAsmInfo(Triple);
>> -  else
>> -    return c.Codes[0];
>> -
>> -  const char *const *table = TargetAsm->getAsmCBE();
>> -
>> -  // Search the translation table if it exists.
>> -  for (int i = 0; table && table[i]; i += 2)
>> -    if (c.Codes[0] == table[i]) {
>> -      delete TargetAsm;
>> -      return table[i+1];
>> -    }
>> -
>> -  // Default is identity.
>> -  delete TargetAsm;
>> -  return c.Codes[0];
>> -}
>> -
>> -//TODO: import logic from AsmPrinter.cpp
>> -static std::string gccifyAsm(std::string asmstr) {
>> -  for (std::string::size_type i = 0; i != asmstr.size(); ++i)
>> -    if (asmstr[i] == '\n')
>> -      asmstr.replace(i, 1, "\\n");
>> -    else if (asmstr[i] == '\t')
>> -      asmstr.replace(i, 1, "\\t");
>> -    else if (asmstr[i] == '$') {
>> -      if (asmstr[i + 1] == '{') {
>> -        std::string::size_type a = asmstr.find_first_of(':', i + 1);
>> -        std::string::size_type b = asmstr.find_first_of('}', i + 1);
>> -        std::string n = "%" +
>> -          asmstr.substr(a + 1, b - a - 1) +
>> -          asmstr.substr(i + 2, a - i - 2);
>> -        asmstr.replace(i, b - i + 1, n);
>> -        i += n.size() - 1;
>> -      } else
>> -        asmstr.replace(i, 1, "%");
>> -    }
>> -    else if (asmstr[i] == '%')//grr
>> -      { asmstr.replace(i, 1, "%%"); ++i;}
>> -
>> -  return asmstr;
>> -}
>> -
>> -//TODO: assumptions about what consume arguments from the call are likely wrong
>> -//      handle communitivity
>> -void CWriter::visitInlineAsm(CallInst &CI) {
>> -  InlineAsm* as = cast<InlineAsm>(CI.getCalledValue());
>> -  InlineAsm::ConstraintInfoVector Constraints = as->ParseConstraints();
>> -
>> -  std::vector<std::pair<Value*, int> > ResultVals;
>> -  if (CI.getType() == Type::getVoidTy(CI.getContext()))
>> -    ;
>> -  else if (StructType *ST = dyn_cast<StructType>(CI.getType())) {
>> -    for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
>> -      ResultVals.push_back(std::make_pair(&CI, (int)i));
>> -  } else {
>> -    ResultVals.push_back(std::make_pair(&CI, -1));
>> -  }
>> -
>> -  // Fix up the asm string for gcc and emit it.
>> -  Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
>> -  Out << "        :";
>> -
>> -  unsigned ValueCount = 0;
>> -  bool IsFirst = true;
>> -
>> -  // Convert over all the output constraints.
>> -  for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
>> -       E = Constraints.end(); I != E; ++I) {
>> -
>> -    if (I->Type != InlineAsm::isOutput) {
>> -      ++ValueCount;
>> -      continue;  // Ignore non-output constraints.
>> -    }
>> -
>> -    assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
>> -    std::string C = InterpretASMConstraint(*I);
>> -    if (C.empty()) continue;
>> -
>> -    if (!IsFirst) {
>> -      Out << ", ";
>> -      IsFirst = false;
>> -    }
>> -
>> -    // Unpack the dest.
>> -    Value *DestVal;
>> -    int DestValNo = -1;
>> -
>> -    if (ValueCount < ResultVals.size()) {
>> -      DestVal = ResultVals[ValueCount].first;
>> -      DestValNo = ResultVals[ValueCount].second;
>> -    } else
>> -      DestVal = CI.getArgOperand(ValueCount-ResultVals.size());
>> -
>> -    if (I->isEarlyClobber)
>> -      C = "&"+C;
>> -
>> -    Out << "\"=" << C << "\"(" << GetValueName(DestVal);
>> -    if (DestValNo != -1)
>> -      Out << ".field" << DestValNo; // Multiple retvals.
>> -    Out << ")";
>> -    ++ValueCount;
>> -  }
>> -
>> -
>> -  // Convert over all the input constraints.
>> -  Out << "\n        :";
>> -  IsFirst = true;
>> -  ValueCount = 0;
>> -  for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
>> -       E = Constraints.end(); I != E; ++I) {
>> -    if (I->Type != InlineAsm::isInput) {
>> -      ++ValueCount;
>> -      continue;  // Ignore non-input constraints.
>> -    }
>> -
>> -    assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
>> -    std::string C = InterpretASMConstraint(*I);
>> -    if (C.empty()) continue;
>> -
>> -    if (!IsFirst) {
>> -      Out << ", ";
>> -      IsFirst = false;
>> -    }
>> -
>> -    assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
>> -    Value *SrcVal = CI.getArgOperand(ValueCount-ResultVals.size());
>> -
>> -    Out << "\"" << C << "\"(";
>> -    if (!I->isIndirect)
>> -      writeOperand(SrcVal);
>> -    else
>> -      writeOperandDeref(SrcVal);
>> -    Out << ")";
>> -  }
>> -
>> -  // Convert over the clobber constraints.
>> -  IsFirst = true;
>> -  for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
>> -       E = Constraints.end(); I != E; ++I) {
>> -    if (I->Type != InlineAsm::isClobber)
>> -      continue;  // Ignore non-input constraints.
>> -
>> -    assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
>> -    std::string C = InterpretASMConstraint(*I);
>> -    if (C.empty()) continue;
>> -
>> -    if (!IsFirst) {
>> -      Out << ", ";
>> -      IsFirst = false;
>> -    }
>> -
>> -    Out << '\"' << C << '"';
>> -  }
>> -
>> -  Out << ")";
>> -}
>> -
>> -void CWriter::visitAllocaInst(AllocaInst &I) {
>> -  Out << '(';
>> -  printType(Out, I.getType());
>> -  Out << ") alloca(sizeof(";
>> -  printType(Out, I.getType()->getElementType());
>> -  Out << ')';
>> -  if (I.isArrayAllocation()) {
>> -    Out << " * " ;
>> -    writeOperand(I.getOperand(0));
>> -  }
>> -  Out << ')';
>> -}
>> -
>> -void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
>> -                                 gep_type_iterator E, bool Static) {
>> -
>> -  // If there are no indices, just print out the pointer.
>> -  if (I == E) {
>> -    writeOperand(Ptr);
>> -    return;
>> -  }
>> -
>> -  // Find out if the last index is into a vector.  If so, we have to print this
>> -  // specially.  Since vectors can't have elements of indexable type, only the
>> -  // last index could possibly be of a vector element.
>> -  VectorType *LastIndexIsVector = 0;
>> -  {
>> -    for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
>> -      LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
>> -  }
>> -
>> -  Out << "(";
>> -
>> -  // If the last index is into a vector, we can't print it as &a[i][j] because
>> -  // we can't index into a vector with j in GCC.  Instead, emit this as
>> -  // (((float*)&a[i])+j)
>> -  if (LastIndexIsVector) {
>> -    Out << "((";
>> -    printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
>> -    Out << ")(";
>> -  }
>> -
>> -  Out << '&';
>> -
>> -  // If the first index is 0 (very typical) we can do a number of
>> -  // simplifications to clean up the code.
>> -  Value *FirstOp = I.getOperand();
>> -  if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
>> -    // First index isn't simple, print it the hard way.
>> -    writeOperand(Ptr);
>> -  } else {
>> -    ++I;  // Skip the zero index.
>> -
>> -    // Okay, emit the first operand. If Ptr is something that is already address
>> -    // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
>> -    if (isAddressExposed(Ptr)) {
>> -      writeOperandInternal(Ptr, Static);
>> -    } else if (I != E && (*I)->isStructTy()) {
>> -      // If we didn't already emit the first operand, see if we can print it as
>> -      // P->f instead of "P[0].f"
>> -      writeOperand(Ptr);
>> -      Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
>> -      ++I;  // eat the struct index as well.
>> -    } else {
>> -      // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
>> -      Out << "(*";
>> -      writeOperand(Ptr);
>> -      Out << ")";
>> -    }
>> -  }
>> -
>> -  for (; I != E; ++I) {
>> -    if ((*I)->isStructTy()) {
>> -      Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
>> -    } else if ((*I)->isArrayTy()) {
>> -      Out << ".array[";
>> -      writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
>> -      Out << ']';
>> -    } else if (!(*I)->isVectorTy()) {
>> -      Out << '[';
>> -      writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
>> -      Out << ']';
>> -    } else {
>> -      // If the last index is into a vector, then print it out as "+j)".  This
>> -      // works with the 'LastIndexIsVector' code above.
>> -      if (isa<Constant>(I.getOperand()) &&
>> -          cast<Constant>(I.getOperand())->isNullValue()) {
>> -        Out << "))";  // avoid "+0".
>> -      } else {
>> -        Out << ")+(";
>> -        writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
>> -        Out << "))";
>> -      }
>> -    }
>> -  }
>> -  Out << ")";
>> -}
>> -
>> -void CWriter::writeMemoryAccess(Value *Operand, Type *OperandType,
>> -                                bool IsVolatile, unsigned Alignment) {
>> -
>> -  bool IsUnaligned = Alignment &&
>> -    Alignment < TD->getABITypeAlignment(OperandType);
>> -
>> -  if (!IsUnaligned)
>> -    Out << '*';
>> -  if (IsVolatile || IsUnaligned) {
>> -    Out << "((";
>> -    if (IsUnaligned)
>> -      Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
>> -    printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
>> -    if (IsUnaligned) {
>> -      Out << "; } ";
>> -      if (IsVolatile) Out << "volatile ";
>> -      Out << "*";
>> -    }
>> -    Out << ")";
>> -  }
>> -
>> -  writeOperand(Operand);
>> -
>> -  if (IsVolatile || IsUnaligned) {
>> -    Out << ')';
>> -    if (IsUnaligned)
>> -      Out << "->data";
>> -  }
>> -}
>> -
>> -void CWriter::visitLoadInst(LoadInst &I) {
>> -  writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
>> -                    I.getAlignment());
>> -
>> -}
>> -
>> -void CWriter::visitStoreInst(StoreInst &I) {
>> -  writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
>> -                    I.isVolatile(), I.getAlignment());
>> -  Out << " = ";
>> -  Value *Operand = I.getOperand(0);
>> -  Constant *BitMask = 0;
>> -  if (IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
>> -    if (!ITy->isPowerOf2ByteWidth())
>> -      // We have a bit width that doesn't match an even power-of-2 byte
>> -      // size. Consequently we must & the value with the type's bit mask
>> -      BitMask = ConstantInt::get(ITy, ITy->getBitMask());
>> -  if (BitMask)
>> -    Out << "((";
>> -  writeOperand(Operand);
>> -  if (BitMask) {
>> -    Out << ") & ";
>> -    printConstant(BitMask, false);
>> -    Out << ")";
>> -  }
>> -}
>> -
>> -void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
>> -  printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
>> -                     gep_type_end(I), false);
>> -}
>> -
>> -void CWriter::visitVAArgInst(VAArgInst &I) {
>> -  Out << "va_arg(*(va_list*)";
>> -  writeOperand(I.getOperand(0));
>> -  Out << ", ";
>> -  printType(Out, I.getType());
>> -  Out << ");\n ";
>> -}
>> -
>> -void CWriter::visitInsertElementInst(InsertElementInst &I) {
>> -  Type *EltTy = I.getType()->getElementType();
>> -  writeOperand(I.getOperand(0));
>> -  Out << ";\n  ";
>> -  Out << "((";
>> -  printType(Out, PointerType::getUnqual(EltTy));
>> -  Out << ")(&" << GetValueName(&I) << "))[";
>> -  writeOperand(I.getOperand(2));
>> -  Out << "] = (";
>> -  writeOperand(I.getOperand(1));
>> -  Out << ")";
>> -}
>> -
>> -void CWriter::visitExtractElementInst(ExtractElementInst &I) {
>> -  // We know that our operand is not inlined.
>> -  Out << "((";
>> -  Type *EltTy =
>> -    cast<VectorType>(I.getOperand(0)->getType())->getElementType();
>> -  printType(Out, PointerType::getUnqual(EltTy));
>> -  Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
>> -  writeOperand(I.getOperand(1));
>> -  Out << "]";
>> -}
>> -
>> -void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
>> -  Out << "(";
>> -  printType(Out, SVI.getType());
>> -  Out << "){ ";
>> -  VectorType *VT = SVI.getType();
>> -  unsigned NumElts = VT->getNumElements();
>> -  Type *EltTy = VT->getElementType();
>> -
>> -  for (unsigned i = 0; i != NumElts; ++i) {
>> -    if (i) Out << ", ";
>> -    int SrcVal = SVI.getMaskValue(i);
>> -    if ((unsigned)SrcVal >= NumElts*2) {
>> -      Out << " 0/*undef*/ ";
>> -    } else {
>> -      Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
>> -      if (isa<Instruction>(Op)) {
>> -        // Do an extractelement of this value from the appropriate input.
>> -        Out << "((";
>> -        printType(Out, PointerType::getUnqual(EltTy));
>> -        Out << ")(&" << GetValueName(Op)
>> -            << "))[" << (SrcVal & (NumElts-1)) << "]";
>> -      } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
>> -        Out << "0";
>> -      } else {
>> -        printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
>> -                                                           (NumElts-1)),
>> -                      false);
>> -      }
>> -    }
>> -  }
>> -  Out << "}";
>> -}
>> -
>> -void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
>> -  // Start by copying the entire aggregate value into the result variable.
>> -  writeOperand(IVI.getOperand(0));
>> -  Out << ";\n  ";
>> -
>> -  // Then do the insert to update the field.
>> -  Out << GetValueName(&IVI);
>> -  for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
>> -       i != e; ++i) {
>> -    Type *IndexedTy =
>> -      ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(),
>> -                                       makeArrayRef(b, i+1));
>> -    if (IndexedTy->isArrayTy())
>> -      Out << ".array[" << *i << "]";
>> -    else
>> -      Out << ".field" << *i;
>> -  }
>> -  Out << " = ";
>> -  writeOperand(IVI.getOperand(1));
>> -}
>> -
>> -void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
>> -  Out << "(";
>> -  if (isa<UndefValue>(EVI.getOperand(0))) {
>> -    Out << "(";
>> -    printType(Out, EVI.getType());
>> -    Out << ") 0/*UNDEF*/";
>> -  } else {
>> -    Out << GetValueName(EVI.getOperand(0));
>> -    for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
>> -         i != e; ++i) {
>> -      Type *IndexedTy =
>> -        ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(),
>> -                                         makeArrayRef(b, i+1));
>> -      if (IndexedTy->isArrayTy())
>> -        Out << ".array[" << *i << "]";
>> -      else
>> -        Out << ".field" << *i;
>> -    }
>> -  }
>> -  Out << ")";
>> -}
>> -
>> -//===----------------------------------------------------------------------===//
>> -//                       External Interface declaration
>> -//===----------------------------------------------------------------------===//
>> -
>> -bool CTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
>> -                                         formatted_raw_ostream &o,
>> -                                         CodeGenFileType FileType,
>> -                                         bool DisableVerify) {
>> -  if (FileType != TargetMachine::CGFT_AssemblyFile) return true;
>> -
>> -  PM.add(createGCLoweringPass());
>> -  PM.add(createLowerInvokePass());
>> -  PM.add(createCFGSimplificationPass());   // clean up after lower invoke.
>> -  PM.add(new CWriter(o));
>> -  PM.add(createGCInfoDeleter());
>> -  return false;
>> -}
>>
>> Removed: llvm/trunk/lib/Target/CBackend/CMakeLists.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/CMakeLists.txt?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/CMakeLists.txt (original)
>> +++ llvm/trunk/lib/Target/CBackend/CMakeLists.txt (removed)
>> @@ -1,5 +0,0 @@
>> -add_llvm_target(CBackendCodeGen
>> -  CBackend.cpp
>> -  )
>> -
>> -add_subdirectory(TargetInfo)
>>
>> Removed: llvm/trunk/lib/Target/CBackend/CTargetMachine.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/CTargetMachine.h?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/CTargetMachine.h (original)
>> +++ llvm/trunk/lib/Target/CBackend/CTargetMachine.h (removed)
>> @@ -1,42 +0,0 @@
>> -//===-- CTargetMachine.h - TargetMachine for the C backend ------*- C++ -*-===//
>> -//
>> -//                     The LLVM Compiler Infrastructure
>> -//
>> -// This file is distributed under the University of Illinois Open Source
>> -// License. See LICENSE.TXT for details.
>> -//
>> -//===----------------------------------------------------------------------===//
>> -//
>> -// This file declares the TargetMachine that is used by the C backend.
>> -//
>> -//===----------------------------------------------------------------------===//
>> -
>> -#ifndef CTARGETMACHINE_H
>> -#define CTARGETMACHINE_H
>> -
>> -#include "llvm/Target/TargetMachine.h"
>> -#include "llvm/Target/TargetData.h"
>> -
>> -namespace llvm {
>> -
>> -struct CTargetMachine : public TargetMachine {
>> -  CTargetMachine(const Target &T, StringRef TT,
>> -                 StringRef CPU, StringRef FS, const TargetOptions &Options,
>> -                 Reloc::Model RM, CodeModel::Model CM,
>> -                 CodeGenOpt::Level OL)
>> -    : TargetMachine(T, TT, CPU, FS, Options) { }
>> -
>> -  virtual bool addPassesToEmitFile(PassManagerBase &PM,
>> -                                   formatted_raw_ostream &Out,
>> -                                   CodeGenFileType FileType,
>> -                                   bool DisableVerify);
>> -
>> -  virtual const TargetData *getTargetData() const { return 0; }
>> -};
>> -
>> -extern Target TheCBackendTarget;
>> -
>> -} // End llvm namespace
>> -
>> -
>> -#endif
>>
>> Removed: llvm/trunk/lib/Target/CBackend/LLVMBuild.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/LLVMBuild.txt?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/LLVMBuild.txt (original)
>> +++ llvm/trunk/lib/Target/CBackend/LLVMBuild.txt (removed)
>> @@ -1,31 +0,0 @@
>> -;===- ./lib/Target/CBackend/LLVMBuild.txt ----------------------*- Conf -*--===;
>> -;
>> -;                     The LLVM Compiler Infrastructure
>> -;
>> -; This file is distributed under the University of Illinois Open Source
>> -; License. See LICENSE.TXT for details.
>> -;
>> -;===------------------------------------------------------------------------===;
>> -;
>> -; This is an LLVMBuild description file for the components in this subdirectory.
>> -;
>> -; For more information on the LLVMBuild system, please see:
>> -;
>> -;   http://llvm.org/docs/LLVMBuild.html
>> -;
>> -;===------------------------------------------------------------------------===;
>> -
>> -[common]
>> -subdirectories = TargetInfo
>> -
>> -[component_0]
>> -type = TargetGroup
>> -name = CBackend
>> -parent = Target
>> -
>> -[component_1]
>> -type = Library
>> -name = CBackendCodeGen
>> -parent = CBackend
>> -required_libraries = Analysis CBackendInfo CodeGen Core MC Scalar Support Target TransformUtils
>> -add_to_library_groups = CBackend
>>
>> Removed: llvm/trunk/lib/Target/CBackend/Makefile
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/Makefile?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/Makefile (original)
>> +++ llvm/trunk/lib/Target/CBackend/Makefile (removed)
>> @@ -1,16 +0,0 @@
>> -##===- lib/Target/CBackend/Makefile ------------------------*- Makefile -*-===##
>> -#
>> -#                     The LLVM Compiler Infrastructure
>> -#
>> -# This file is distributed under the University of Illinois Open Source
>> -# License. See LICENSE.TXT for details.
>> -#
>> -##===----------------------------------------------------------------------===##
>> -
>> -LEVEL = ../../..
>> -LIBRARYNAME = LLVMCBackendCodeGen
>> -DIRS = TargetInfo
>> -
>> -include $(LEVEL)/Makefile.common
>> -
>> -CompileCommonOpts += -Wno-format
>>
>> Removed: llvm/trunk/lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp (original)
>> +++ llvm/trunk/lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp (removed)
>> @@ -1,21 +0,0 @@
>> -//===-- CBackendTargetInfo.cpp - CBackend Target Implementation -----------===//
>> -//
>> -//                     The LLVM Compiler Infrastructure
>> -//
>> -// This file is distributed under the University of Illinois Open Source
>> -// License. See LICENSE.TXT for details.
>> -//
>> -//===----------------------------------------------------------------------===//
>> -
>> -#include "CTargetMachine.h"
>> -#include "llvm/Module.h"
>> -#include "llvm/Support/TargetRegistry.h"
>> -using namespace llvm;
>> -
>> -Target llvm::TheCBackendTarget;
>> -
>> -extern "C" void LLVMInitializeCBackendTargetInfo() {
>> -  RegisterTarget<> X(TheCBackendTarget, "c", "C backend");
>> -}
>> -
>> -extern "C" void LLVMInitializeCBackendTargetMC() {}
>>
>> Removed: llvm/trunk/lib/Target/CBackend/TargetInfo/CMakeLists.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/TargetInfo/CMakeLists.txt?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/TargetInfo/CMakeLists.txt (original)
>> +++ llvm/trunk/lib/Target/CBackend/TargetInfo/CMakeLists.txt (removed)
>> @@ -1,5 +0,0 @@
>> -include_directories( ${CMAKE_CURRENT_BINARY_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/.. )
>> -
>> -add_llvm_library(LLVMCBackendInfo
>> -  CBackendTargetInfo.cpp
>> -  )
>>
>> Removed: llvm/trunk/lib/Target/CBackend/TargetInfo/LLVMBuild.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/TargetInfo/LLVMBuild.txt?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/TargetInfo/LLVMBuild.txt (original)
>> +++ llvm/trunk/lib/Target/CBackend/TargetInfo/LLVMBuild.txt (removed)
>> @@ -1,23 +0,0 @@
>> -;===- ./lib/Target/CBackend/TargetInfo/LLVMBuild.txt -----------*- Conf -*--===;
>> -;
>> -;                     The LLVM Compiler Infrastructure
>> -;
>> -; This file is distributed under the University of Illinois Open Source
>> -; License. See LICENSE.TXT for details.
>> -;
>> -;===------------------------------------------------------------------------===;
>> -;
>> -; This is an LLVMBuild description file for the components in this subdirectory.
>> -;
>> -; For more information on the LLVMBuild system, please see:
>> -;
>> -;   http://llvm.org/docs/LLVMBuild.html
>> -;
>> -;===------------------------------------------------------------------------===;
>> -
>> -[component_0]
>> -type = Library
>> -name = CBackendInfo
>> -parent = CBackend
>> -required_libraries = MC Support Target
>> -add_to_library_groups = CBackend
>>
>> Removed: llvm/trunk/lib/Target/CBackend/TargetInfo/Makefile
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/TargetInfo/Makefile?rev=153306&view=auto
>> ==============================================================================
>> --- llvm/trunk/lib/Target/CBackend/TargetInfo/Makefile (original)
>> +++ llvm/trunk/lib/Target/CBackend/TargetInfo/Makefile (removed)
>> @@ -1,15 +0,0 @@
>> -##===- lib/Target/CBackend/TargetInfo/Makefile -------------*- Makefile -*-===##
>> -#
>> -#                     The LLVM Compiler Infrastructure
>> -#
>> -# This file is distributed under the University of Illinois Open Source
>> -# License. See LICENSE.TXT for details.
>> -#
>> -##===----------------------------------------------------------------------===##
>> -LEVEL = ../../../..
>> -LIBRARYNAME = LLVMCBackendInfo
>> -
>> -# Hack: we need to include 'main' target directory to grab private headers
>> -CPPFLAGS = -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
>> -
>> -include $(LEVEL)/Makefile.common
>>
>> Modified: llvm/trunk/lib/Target/LLVMBuild.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/LLVMBuild.txt?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/LLVMBuild.txt (original)
>> +++ llvm/trunk/lib/Target/LLVMBuild.txt Fri Mar 23 00:50:46 2012
>> @@ -16,7 +16,7 @@
>> ;===------------------------------------------------------------------------===;
>>
>> [common]
>> -subdirectories = ARM CBackend CellSPU CppBackend Hexagon MBlaze MSP430 Mips PTX PowerPC Sparc X86 XCore
>> +subdirectories = ARM CellSPU CppBackend Hexagon MBlaze MSP430 Mips PTX PowerPC Sparc X86 XCore
>>
>> ; This is a special group whose required libraries are extended (by llvm-build)
>> ; with the best execution engine (the native JIT, if available, or the
>>
>> Modified: llvm/trunk/projects/sample/autoconf/configure.ac
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/projects/sample/autoconf/configure.ac?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/projects/sample/autoconf/configure.ac (original)
>> +++ llvm/trunk/projects/sample/autoconf/configure.ac Fri Mar 23 00:50:46 2012
>> @@ -554,7 +554,7 @@
>>  enableval=host
>> fi
>> case "$enableval" in
>> -  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 Hexagon CBackend CppBackend MBlaze PTX" ;;
>> +  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 Hexagon CppBackend MBlaze PTX" ;;
>>  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
>>      case "$a_target" in
>>        x86)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
>> @@ -567,7 +567,6 @@
>>        xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
>>        msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
>>        hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
>> -        cbe)      TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;;
>>        cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
>>        mblaze)   TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
>>        ptx)      TARGETS_TO_BUILD="PTX $TARGETS_TO_BUILD" ;;
>> @@ -644,21 +643,6 @@
>> AC_SUBST(LLVM_ENUM_ASM_PARSERS)
>> AC_SUBST(LLVM_ENUM_DISASSEMBLERS)
>>
>> -dnl Prevent the CBackend from using printf("%a") for floating point so older
>> -dnl C compilers that cannot deal with the 0x0p+0 hex floating point format
>> -dnl can still compile the CBE's output
>> -AC_ARG_ENABLE([cbe-printf-a],AS_HELP_STRING([--enable-cbe-printf-a],
>> -  [Enable C Backend output with hex floating point via %a  (default is YES)]),,
>> -  enableval=default)
>> -case "$enableval" in
>> -  yes) AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
>> -  no)  AC_SUBST(ENABLE_CBE_PRINTF_A,[0]) ;;
>> -  default)  AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
>> -  *) AC_MSG_ERROR([Invalid setting for --enable-cbe-printf-a. Use "yes" or "no"]) ;;
>> -esac
>> -AC_DEFINE_UNQUOTED([ENABLE_CBE_PRINTF_A],$ENABLE_CBE_PRINTF_A,
>> -                   [Define if CBE is enabled for printf %a output])
>> -
>> dnl Override the option to use for optimized builds.
>> AC_ARG_WITH(optimize-option,
>>  AS_HELP_STRING([--with-optimize-option],
>>
>> Modified: llvm/trunk/projects/sample/configure
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/projects/sample/configure?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/projects/sample/configure (original)
>> +++ llvm/trunk/projects/sample/configure Fri Mar 23 00:50:46 2012
>> @@ -704,7 +704,6 @@
>> LLVM_ENUM_ASM_PRINTERS
>> LLVM_ENUM_ASM_PARSERS
>> LLVM_ENUM_DISASSEMBLERS
>> -ENABLE_CBE_PRINTF_A
>> OPTIMIZE_OPTION
>> EXTRA_OPTIONS
>> EXTRA_LD_OPTIONS
>> @@ -1402,8 +1401,6 @@
>>                          target1,target2,... Valid targets are: host, x86,
>>                          x86_64, sparc, powerpc, arm, mips, spu, hexagon,
>>                          xcore, msp430, ptx, cbe, and cpp (default=all)
>> -  --enable-cbe-printf-a   Enable C Backend output with hex floating point via
>> -                          %a (default is YES)
>>  --enable-bindings       Build specific language bindings:
>>                          all,auto,none,{binding-name} (default=auto)
>>  --enable-libffi         Check for the presence of libffi (default is NO)
>> @@ -5229,7 +5226,7 @@
>>  enableval=host
>> fi
>> case "$enableval" in
>> -  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 Hexagon CBackend CppBackend MBlaze PTX" ;;
>> +  all) TARGETS_TO_BUILD="X86 Sparc PowerPC ARM Mips CellSPU XCore MSP430 Hexagon CppBackend MBlaze PTX" ;;
>>  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
>>      case "$a_target" in
>>        x86)      TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
>> @@ -5242,7 +5239,6 @@
>>        xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
>>        msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
>>        hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
>> -        cbe)      TARGETS_TO_BUILD="CBackend $TARGETS_TO_BUILD" ;;
>>        cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
>>        mblaze)   TARGETS_TO_BUILD="MBlaze $TARGETS_TO_BUILD" ;;
>>        ptx)      TARGETS_TO_BUILD="PTX $TARGETS_TO_BUILD" ;;
>> @@ -5342,30 +5338,6 @@
>>
>>
>>
>> -# Check whether --enable-cbe-printf-a was given.
>> -if test "${enable_cbe_printf_a+set}" = set; then
>> -  enableval=$enable_cbe_printf_a;
>> -else
>> -  enableval=default
>> -fi
>> -
>> -case "$enableval" in
>> -  yes) ENABLE_CBE_PRINTF_A=1
>> - ;;
>> -  no)  ENABLE_CBE_PRINTF_A=0
>> - ;;
>> -  default)  ENABLE_CBE_PRINTF_A=1
>> - ;;
>> -  *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-cbe-printf-a. Use \"yes\" or \"no\"" >&5
>> -echo "$as_me: error: Invalid setting for --enable-cbe-printf-a. Use \"yes\" or \"no\"" >&2;}
>> -   { (exit 1); exit 1; }; } ;;
>> -esac
>> -
>> -cat >>confdefs.h <<_ACEOF
>> -#define ENABLE_CBE_PRINTF_A $ENABLE_CBE_PRINTF_A
>> -_ACEOF
>> -
>> -
>>
>> # Check whether --with-optimize-option was given.
>> if test "${with_optimize_option+set}" = set; then
>> @@ -10297,7 +10269,7 @@
>>  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
>>  lt_status=$lt_dlunknown
>>  cat > conftest.$ac_ext <<EOF
>> -#line 10300 "configure"
>> +#line 10272 "configure"
>> #include "confdefs.h"
>>
>> #if HAVE_DLFCN_H
>> @@ -21692,7 +21664,6 @@
>> LLVM_ENUM_ASM_PRINTERS!$LLVM_ENUM_ASM_PRINTERS$ac_delim
>> LLVM_ENUM_ASM_PARSERS!$LLVM_ENUM_ASM_PARSERS$ac_delim
>> LLVM_ENUM_DISASSEMBLERS!$LLVM_ENUM_DISASSEMBLERS$ac_delim
>> -ENABLE_CBE_PRINTF_A!$ENABLE_CBE_PRINTF_A$ac_delim
>> OPTIMIZE_OPTION!$OPTIMIZE_OPTION$ac_delim
>> EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
>> EXTRA_LD_OPTIONS!$EXTRA_LD_OPTIONS$ac_delim
>> @@ -21776,7 +21747,7 @@
>> LTLIBOBJS!$LTLIBOBJS$ac_delim
>> _ACEOF
>>
>> -  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 89; then
>> +  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 88; then
>>    break
>>  elif $ac_last_try; then
>>    { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
>>
>> Modified: llvm/trunk/tools/bugpoint/ExecutionDriver.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/bugpoint/ExecutionDriver.cpp?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/tools/bugpoint/ExecutionDriver.cpp (original)
>> +++ llvm/trunk/tools/bugpoint/ExecutionDriver.cpp Fri Mar 23 00:50:46 2012
>> @@ -28,8 +28,7 @@
>>  // for miscompilation.
>>  //
>>  enum OutputType {
>> -    AutoPick, RunLLI, RunJIT, RunLLC, RunLLCIA, RunCBE, CBE_bug, LLC_Safe,
>> -    CompileCustom, Custom
>> +    AutoPick, RunLLI, RunJIT, RunLLC, RunLLCIA, LLC_Safe, CompileCustom, Custom
>>  };
>>
>>  cl::opt<double>
>> @@ -48,8 +47,6 @@
>>                            clEnumValN(RunLLC, "run-llc", "Compile with LLC"),
>>                            clEnumValN(RunLLCIA, "run-llc-ia",
>>                                  "Compile with LLC with integrated assembler"),
>> -                            clEnumValN(RunCBE, "run-cbe", "Compile with CBE"),
>> -                            clEnumValN(CBE_bug,"cbe-bug", "Find CBE bugs"),
>>                            clEnumValN(LLC_Safe, "llc-safe", "Use LLC for all"),
>>                            clEnumValN(CompileCustom, "compile-custom",
>>                            "Use -compile-command to define a command to "
>> @@ -64,7 +61,6 @@
>>  SafeInterpreterSel(cl::desc("Specify \"safe\" i.e. known-good backend:"),
>>              cl::values(clEnumValN(AutoPick, "safe-auto", "Use best guess"),
>>                         clEnumValN(RunLLC, "safe-run-llc", "Compile with LLC"),
>> -                         clEnumValN(RunCBE, "safe-run-cbe", "Compile with CBE"),
>>                         clEnumValN(Custom, "safe-run-custom",
>>                         "Use -exec-command to define a command to execute "
>>                         "the bitcode. Useful for cross-compilation."),
>> @@ -154,10 +150,6 @@
>>
>>  switch (InterpreterSel) {
>>  case AutoPick:
>> -    InterpreterSel = RunCBE;
>> -    Interpreter =
>> -      AbstractInterpreter::createCBE(getToolName(), Message, GCCBinary,
>> -                                     &ToolArgv, &GCCToolArgv);
>>    if (!Interpreter) {
>>      InterpreterSel = RunJIT;
>>      Interpreter = AbstractInterpreter::createJIT(getToolName(), Message,
>> @@ -195,12 +187,6 @@
>>    Interpreter = AbstractInterpreter::createJIT(getToolName(), Message,
>>                                                 &ToolArgv);
>>    break;
>> -  case RunCBE:
>> -  case CBE_bug:
>> -    Interpreter = AbstractInterpreter::createCBE(getToolName(), Message,
>> -                                                 GCCBinary, &ToolArgv,
>> -                                                 &GCCToolArgv);
>> -    break;
>>  case CompileCustom:
>>    Interpreter =
>>      AbstractInterpreter::createCustomCompiler(Message, CustomCompileCommand);
>> @@ -221,17 +207,6 @@
>>  std::vector<std::string> SafeToolArgs = SafeToolArgv;
>>  switch (SafeInterpreterSel) {
>>  case AutoPick:
>> -    // In "cbe-bug" mode, default to using LLC as the "safe" backend.
>> -    if (!SafeInterpreter &&
>> -        InterpreterSel == CBE_bug) {
>> -      SafeInterpreterSel = RunLLC;
>> -      SafeToolArgs.push_back("--relocation-model=pic");
>> -      SafeInterpreter = AbstractInterpreter::createLLC(Path.c_str(), Message,
>> -                                                       GCCBinary,
>> -                                                       &SafeToolArgs,
>> -                                                       &GCCToolArgv);
>> -    }
>> -
>>    // In "llc-safe" mode, default to using LLC as the "safe" backend.
>>    if (!SafeInterpreter &&
>>        InterpreterSel == LLC_Safe) {
>> @@ -243,17 +218,6 @@
>>                                                       &GCCToolArgv);
>>    }
>>
>> -    // Pick a backend that's different from the test backend. The JIT and
>> -    // LLC backends share a lot of code, so prefer to use the CBE as the
>> -    // safe back-end when testing them.
>> -    if (!SafeInterpreter &&
>> -        InterpreterSel != RunCBE) {
>> -      SafeInterpreterSel = RunCBE;
>> -      SafeInterpreter = AbstractInterpreter::createCBE(Path.c_str(), Message,
>> -                                                       GCCBinary,
>> -                                                       &SafeToolArgs,
>> -                                                       &GCCToolArgv);
>> -    }
>>    if (!SafeInterpreter &&
>>        InterpreterSel != RunLLC &&
>>        InterpreterSel != RunJIT) {
>> @@ -277,11 +241,6 @@
>>                                                     &GCCToolArgv,
>>                                                SafeInterpreterSel == RunLLCIA);
>>    break;
>> -  case RunCBE:
>> -    SafeInterpreter = AbstractInterpreter::createCBE(Path.c_str(), Message,
>> -                                                     GCCBinary, &SafeToolArgs,
>> -                                                     &GCCToolArgv);
>> -    break;
>>  case Custom:
>>    SafeInterpreter =
>>      AbstractInterpreter::createCustomExecutor(Message, CustomExecCommand);
>> @@ -459,8 +418,8 @@
>>    errs() << Error;
>>    if (Interpreter != SafeInterpreter) {
>>      errs() << "*** There is a bug running the \"safe\" backend.  Either"
>> -             << " debug it (for example with the -run-cbe bugpoint option,"
>> -             << " if CBE is being used as the \"safe\" backend), or fix the"
>> +             << " debug it (for example with the -run-jit bugpoint option,"
>> +             << " if JIT is being used as the \"safe\" backend), or fix the"
>>             << " error some other way.\n";
>>    }
>>    return false;
>>
>> Modified: llvm/trunk/tools/bugpoint/ToolRunner.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/bugpoint/ToolRunner.cpp?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/tools/bugpoint/ToolRunner.cpp (original)
>> +++ llvm/trunk/tools/bugpoint/ToolRunner.cpp Fri Mar 23 00:50:46 2012
>> @@ -623,94 +623,6 @@
>>  return 0;
>> }
>>
>> -GCC::FileType CBE::OutputCode(const std::string &Bitcode,
>> -                              sys::Path &OutputCFile, std::string &Error,
>> -                              unsigned Timeout, unsigned MemoryLimit) {
>> -  sys::Path uniqueFile(Bitcode+".cbe.c");
>> -  std::string ErrMsg;
>> -  if (uniqueFile.makeUnique(true, &ErrMsg)) {
>> -    errs() << "Error making unique filename: " << ErrMsg << "\n";
>> -    exit(1);
>> -  }
>> -  OutputCFile = uniqueFile;
>> -  std::vector<const char *> LLCArgs;
>> -  LLCArgs.push_back(LLCPath.c_str());
>> -
>> -  // Add any extra LLC args.
>> -  for (unsigned i = 0, e = ToolArgs.size(); i != e; ++i)
>> -    LLCArgs.push_back(ToolArgs[i].c_str());
>> -
>> -  LLCArgs.push_back("-o");
>> -  LLCArgs.push_back(OutputCFile.c_str());   // Output to the C file
>> -  LLCArgs.push_back("-march=c");            // Output C language
>> -  LLCArgs.push_back(Bitcode.c_str()); // This is the input bitcode
>> -  LLCArgs.push_back(0);
>> -
>> -  outs() << "<cbe>"; outs().flush();
>> -  DEBUG(errs() << "\nAbout to run:\t";
>> -        for (unsigned i = 0, e = LLCArgs.size()-1; i != e; ++i)
>> -          errs() << " " << LLCArgs[i];
>> -        errs() << "\n";
>> -        );
>> -  if (RunProgramWithTimeout(LLCPath, &LLCArgs[0], sys::Path(), sys::Path(),
>> -                            sys::Path(), Timeout, MemoryLimit))
>> -    Error = ProcessFailure(LLCPath, &LLCArgs[0], Timeout, MemoryLimit);
>> -  return GCC::CFile;
>> -}
>> -
>> -void CBE::compileProgram(const std::string &Bitcode, std::string *Error,
>> -                         unsigned Timeout, unsigned MemoryLimit) {
>> -  sys::Path OutputCFile;
>> -  OutputCode(Bitcode, OutputCFile, *Error, Timeout, MemoryLimit);
>> -  OutputCFile.eraseFromDisk();
>> -}
>> -
>> -int CBE::ExecuteProgram(const std::string &Bitcode,
>> -                        const std::vector<std::string> &Args,
>> -                        const std::string &InputFile,
>> -                        const std::string &OutputFile,
>> -                        std::string *Error,
>> -                        const std::vector<std::string> &ArgsForGCC,
>> -                        const std::vector<std::string> &SharedLibs,
>> -                        unsigned Timeout,
>> -                        unsigned MemoryLimit) {
>> -  sys::Path OutputCFile;
>> -  OutputCode(Bitcode, OutputCFile, *Error, Timeout, MemoryLimit);
>> -
>> -  FileRemover CFileRemove(OutputCFile.str(), !SaveTemps);
>> -
>> -  std::vector<std::string> GCCArgs(ArgsForGCC);
>> -  GCCArgs.insert(GCCArgs.end(), SharedLibs.begin(), SharedLibs.end());
>> -
>> -  return gcc->ExecuteProgram(OutputCFile.str(), Args, GCC::CFile,
>> -                             InputFile, OutputFile, Error, GCCArgs,
>> -                             Timeout, MemoryLimit);
>> -}
>> -
>> -/// createCBE - Try to find the 'llc' executable
>> -///
>> -CBE *AbstractInterpreter::createCBE(const char *Argv0,
>> -                                    std::string &Message,
>> -                                    const std::string &GCCBinary,
>> -                                    const std::vector<std::string> *Args,
>> -                                    const std::vector<std::string> *GCCArgs) {
>> -  sys::Path LLCPath =
>> -    PrependMainExecutablePath("llc", Argv0, (void *)(intptr_t)&createCBE);
>> -  if (LLCPath.isEmpty()) {
>> -    Message =
>> -      "Cannot find `llc' in executable directory!\n";
>> -    return 0;
>> -  }
>> -
>> -  Message = "Found llc: " + LLCPath.str() + "\n";
>> -  GCC *gcc = GCC::create(Message, GCCBinary, GCCArgs);
>> -  if (!gcc) {
>> -    errs() << Message << "\n";
>> -    exit(1);
>> -  }
>> -  return new CBE(LLCPath, gcc, Args);
>> -}
>> -
>> //===---------------------------------------------------------------------===//
>> // GCC abstraction
>> //
>>
>> Modified: llvm/trunk/utils/GenLibDeps.pl
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/GenLibDeps.pl?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/utils/GenLibDeps.pl (original)
>> +++ llvm/trunk/utils/GenLibDeps.pl Fri Mar 23 00:50:46 2012
>> @@ -96,7 +96,6 @@
>>    $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
>>    $libpath =~ s/^BitReader/Bitcode\/Reader/;
>>    $libpath =~ s/^BitWriter/Bitcode\/Writer/;
>> -    $libpath =~ s/^CBackend/Target\/CBackend/;
>>    $libpath =~ s/^CppBackend/Target\/CppBackend/;
>>    $libpath =~ s/^MSIL/Target\/MSIL/;
>>    $libpath =~ s/^Core/VMCore/;
>> @@ -138,7 +137,6 @@
>>    $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
>>    $libpath =~ s/^BitReader/Bitcode\/Reader/;
>>    $libpath =~ s/^BitWriter/Bitcode\/Writer/;
>> -    $libpath =~ s/^CBackend/Target\/CBackend/;
>>    $libpath =~ s/^CppBackend/Target\/CppBackend/;
>>    $libpath =~ s/^MSIL/Target\/MSIL/;
>>    $libpath =~ s/^Core/VMCore/;
>>
>> Modified: llvm/trunk/utils/lit/lit/ExampleTests/LLVM.InTree/test/site.exp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/ExampleTests/LLVM.InTree/test/site.exp?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/utils/lit/lit/ExampleTests/LLVM.InTree/test/site.exp (original)
>> +++ llvm/trunk/utils/lit/lit/ExampleTests/LLVM.InTree/test/site.exp Fri Mar 23 00:50:46 2012
>> @@ -2,7 +2,7 @@
>> # Do not edit here.  If you wish to override these values
>> # edit the last section
>> set target_triplet "x86_64-apple-darwin10"
>> -set TARGETS_TO_BUILD "X86 Sparc PowerPC ARM Mips CellSPU PIC16 XCore MSP430 Blackfin CBackend MSIL CppBackend"
>> +set TARGETS_TO_BUILD "X86 Sparc PowerPC ARM Mips CellSPU PIC16 XCore MSP430 Blackfin MSIL CppBackend"
>> set srcroot "/Volumes/Data/ddunbar/llvm"
>> set objroot "/Volumes/Data/ddunbar/llvm.obj.64"
>> set srcdir "/Volumes/Data/ddunbar/llvm/test"
>>
>> Modified: llvm/trunk/utils/lit/lit/ExampleTests/LLVM.OutOfTree/obj/test/site.exp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/ExampleTests/LLVM.OutOfTree/obj/test/site.exp?rev=153307&r1=153306&r2=153307&view=diff
>> ==============================================================================
>> --- llvm/trunk/utils/lit/lit/ExampleTests/LLVM.OutOfTree/obj/test/site.exp (original)
>> +++ llvm/trunk/utils/lit/lit/ExampleTests/LLVM.OutOfTree/obj/test/site.exp Fri Mar 23 00:50:46 2012
>> @@ -2,7 +2,7 @@
>> # Do not edit here.  If you wish to override these values
>> # edit the last section
>> set target_triplet "x86_64-apple-darwin10"
>> -set TARGETS_TO_BUILD "X86 Sparc PowerPC ARM Mips CellSPU PIC16 XCore MSP430 Blackfin CBackend MSIL CppBackend"
>> +set TARGETS_TO_BUILD "X86 Sparc PowerPC ARM Mips CellSPU PIC16 XCore MSP430 Blackfin MSIL CppBackend"
>> set srcroot "/Volumes/Data/ddunbar/llvm"
>> set objroot "/Volumes/Data/ddunbar/llvm.obj.64"
>> set srcdir "/Volumes/Data/ddunbar/llvm/test"
>>
>>
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