[llvm-commits] CVS: reopt/tools/reopt-llc/Makefile reopt-llc.cpp
Brian Gaeke
gaeke at cs.uiuc.edu
Thu Sep 30 12:42:48 PDT 2004
Changes in directory reopt/tools/reopt-llc:
Makefile added (r1.1)
reopt-llc.cpp added (r1.1)
---
Log message:
This is going to be the new reoptimizer front end; right now it's mostly just a copy of llc.cpp
---
Diffs of the changes: (+208 -0)
Index: reopt/tools/reopt-llc/Makefile
diff -c /dev/null reopt/tools/reopt-llc/Makefile:1.1
*** /dev/null Thu Sep 30 14:42:47 2004
--- reopt/tools/reopt-llc/Makefile Thu Sep 30 14:42:37 2004
***************
*** 0 ****
--- 1,25 ----
+ LEVEL = ../..
+ TOOLNAME = reopt-llc
+ LLVMLIBS = \
+ cwriter \
+ sparcv9 \
+ sparcv9regalloc \
+ sched \
+ codegen \
+ target.a \
+ sparcv9livevar \
+ ipa.a \
+ transforms.a \
+ scalaropts.a \
+ analysis.a \
+ transformutils.a \
+ bcreader \
+ bcwriter \
+ vmcore \
+ support.a \
+ LLVMsystem.a
+
+ TOOLLINKOPTS = $(PLATFORMLIBDL)
+
+ include $(LEVEL)/Makefile.common
+
Index: reopt/tools/reopt-llc/reopt-llc.cpp
diff -c /dev/null reopt/tools/reopt-llc/reopt-llc.cpp:1.1
*** /dev/null Thu Sep 30 14:42:48 2004
--- reopt/tools/reopt-llc/reopt-llc.cpp Thu Sep 30 14:42:37 2004
***************
*** 0 ****
--- 1,183 ----
+ //===- reopt-llc.cpp - Instrument program for reoptimizer -----------------===//
+ //
+ // The LLVM Compiler Infrastructure
+ //
+ // This file was developed by the LLVM research group and is distributed under
+ // the University of Illinois Open Source License. See LICENSE.TXT for
+ // details.
+ //
+ //===----------------------------------------------------------------------===//
+ //
+ // Instruments a program for the benefit of the Reoptimizer and outputs
+ // SparcV9 machine code, in a manner similar to that of the standard LLVM
+ // 'llc' tool.
+ //
+ //===----------------------------------------------------------------------===//
+
+
+ #include "llvm/Bytecode/Reader.h"
+ #include "llvm/Target/TargetMachine.h"
+ #include "llvm/Target/TargetMachineRegistry.h"
+ #include "llvm/Transforms/Scalar.h"
+ #include "llvm/Module.h"
+ #include "llvm/PassManager.h"
+ #include "llvm/Pass.h"
+ #include "llvm/Support/CommandLine.h"
+ #include "llvm/Support/PluginLoader.h"
+ #include "llvm/System/Signals.h"
+ #include <fstream>
+ #include <iostream>
+ #include <memory>
+
+ using namespace llvm;
+
+ // General options for llc. Other pass-specific options are specified
+ // within the corresponding llc passes, and target-specific options
+ // and back-end code generation options are specified with the target machine.
+ //
+ static cl::opt<std::string>
+ InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+
+ static cl::opt<std::string>
+ OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
+
+ static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
+
+ static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
+ MArch("march", cl::desc("Architecture to generate assembly for:"));
+
+ // GetFileNameRoot - Helper function to get the basename of a filename...
+ static inline std::string
+ GetFileNameRoot(const std::string &InputFilename) {
+ std::string IFN = InputFilename;
+ std::string outputFilename;
+ int Len = IFN.length();
+ if ((Len > 2) &&
+ IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+ outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
+ } else {
+ outputFilename = IFN;
+ }
+ return outputFilename;
+ }
+
+ namespace llvm {
+ extern bool SaveRegAllocState; // from SparcV9/RegAlloc/PhyRegAlloc.cpp
+ extern bool EmitMappingInfo; // from SparcV9/SparcV9TargetMachine.cpp
+ }
+
+ // main - Entry point for the llc compiler.
+ //
+ int main(int argc, char **argv) {
+ cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ // Load the module to be compiled...
+ std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ if (M.get() == 0) {
+ std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
+ return 1;
+ }
+ Module &mod = *M.get();
+
+ // Allocate target machine. First, check whether the user has
+ // explicitly specified an architecture to compile for.
+ TargetMachine* (*TargetMachineAllocator)(const Module&,
+ IntrinsicLowering *) = 0;
+ if (MArch == 0) {
+ std::string Err;
+ MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err);
+ if (MArch == 0) {
+ std::cerr << argv[0] << ": error auto-selecting target for module '"
+ << Err << "'. Please use the -march option to explicitly "
+ << "pick a target.\n";
+ return 1;
+ }
+ }
+
+ std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, 0));
+ assert(target.get() && "Could not allocate target machine!");
+ TargetMachine &Target = *target.get();
+ const TargetData &TD = Target.getTargetData();
+
+ // Build up all of the passes that we want to do to the module...
+ PassManager Passes;
+ Passes.add(new TargetData("llc", TD.isLittleEndian(), TD.getPointerSize(),
+ TD.getPointerAlignment(), TD.getDoubleAlignment()));
+
+ // Figure out where we are going to send the output...
+ std::ostream *Out = 0;
+ if (OutputFilename != "") {
+ if (OutputFilename != "-") {
+ // Specified an output filename?
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ std::cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ Out = new std::ofstream(OutputFilename.c_str());
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(OutputFilename);
+ } else {
+ Out = &std::cout;
+ }
+ } else {
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ Out = &std::cout;
+ } else {
+ OutputFilename = GetFileNameRoot(InputFilename);
+
+ if (MArch->Name[0] != 'c' || MArch->Name[1] != 0) // not CBE
+ OutputFilename += ".s";
+ else
+ OutputFilename += ".cbe.c";
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ std::cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+
+ Out = new std::ofstream(OutputFilename.c_str());
+ if (!Out->good()) {
+ std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ delete Out;
+ return 1;
+ }
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(OutputFilename);
+ }
+ }
+
+ // Turn on special SparcV9 backend flags to save mapping info for
+ // the reoptimizer.
+ SaveRegAllocState = true;
+ EmitMappingInfo = true;
+
+ // Ask the target to add backend passes as necessary
+ if (Target.addPassesToEmitAssembly(Passes, *Out)) {
+ std::cerr << argv[0] << ": target '" << Target.getName()
+ << "' does not support static compilation!\n";
+ if (Out != &std::cout) delete Out;
+ // And the Out file is empty and useless, so remove it now.
+ std::remove(OutputFilename.c_str());
+ return 1;
+ } else {
+ // Run our queue of passes all at once now, efficiently.
+ Passes.run(*M.get());
+ }
+
+ // Delete the ostream if it's not a stdout stream
+ if (Out != &std::cout) delete Out;
+
+ return 0;
+ }
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