[llvm] r226598 - Reapply: Teach SROA how to update debug info for fragmented variables.
Adrian Prantl
aprantl at apple.com
Fri Jan 23 09:11:13 PST 2015
> On Jan 23, 2015, at 9:02 AM, Dimitry Andric <dimitry at andric.com> wrote:
>
> I just submitted http://llvm.org/bugs/show_bug.cgi?id=22309 which is the same issue. I think this should fix it:
>
> diff --git a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
> index 3d3da2a..0d1979d 100644
> --- a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
> +++ b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
> @@ -584,7 +584,8 @@ static bool isUnsignedDIType(DwarfDebug *DD, DIType Ty) {
> T == dwarf::DW_TAG_ptr_to_member_type ||
> T == dwarf::DW_TAG_reference_type ||
> T == dwarf::DW_TAG_rvalue_reference_type ||
> - T == dwarf::DW_TAG_structure_type)
> + T == dwarf::DW_TAG_structure_type ||
> + T == dwarf::DW_TAG_union_type)
> return true;
> assert(T == dwarf::DW_TAG_typedef || T == dwarf::DW_TAG_const_type ||
> T == dwarf::DW_TAG_volatile_type ||
>
> but I'm not really sure whether that is the right solution.
No this probably correct. I will just need to create a testcase for it and then I’ll commit the fix.
> Maybe there are even more aggregate types to add to this list?
Yes, historically we’ve been adding them on a case-by-case basis.
-- adrian
>
> -Dimitry
>
>> On 23 Jan 2015, at 16:59, Adrian Prantl <aprantl at apple.com> wrote:
>>
>>
>>> On Jan 23, 2015, at 2:15 AM, Hao Liu <Hao.Liu at arm.com> wrote:
>>>
>>> Hi Adrian,
>>>
>>> I observe a crash caused by this commit on our internal tests. Without "-g"
>>> the test can be built successfully. This original case is a little difficult
>>> to be simplified. I will work on reproducer.
>>
>> That would be great!
>>
>>> Just let you know so that maybe you can find the root cause and fix it.
>>
>> In order to diagnose the problem, it might be sufficient information if you could just to just invoke ->dump() on the type that is passed into isUnsignedDIType(). We may simply need to add another TAG to this list.
>>
>> thanks,
>> -- adrian
>>>
>>> clang-3.7: ./llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:592: bool
>>> isUnsignedDIType(llvm::DwarfDebug*, llvm::DIType): Assertion `T ==
>>> dwarf::DW_TAG_typedef || T == dwarf::DW_TAG_const_type || T ==
>>> dwarf::DW_TAG_volatile_type || T == dwarf::DW_TAG_restrict_type || T ==
>>> dwarf::DW_TAG_enumeration_type' failed.
>>> #0 0x1d27f90 llvm::sys::PrintStackTrace(_IO_FILE*)
>>> ./llvm/lib/Support/Unix/Signals.inc:423:0
>>> #1 0x1d2822b PrintStackTraceSignalHandler(void*)
>>> ./llvm/lib/Support/Unix/Signals.inc:481:0
>>> #2 0x1d26e4d SignalHandler(int) ./llvm/lib/Support/Unix/Signals.inc:198:0
>>> #3 0x7ffaa3f5f340 __restore_rt
>>> (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
>>> #4 0x7ffaa3186cc9 gsignal
>>> /build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:
>>> 0
>>> #5 0x7ffaa318a0d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
>>> #6 0x7ffaa317fb86 __assert_fail_base
>>> /build/buildd/eglibc-2.19/assert/assert.c:92:0
>>> #7 0x7ffaa317fc32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
>>> #8 0x207f2b5 isUnsignedDIType(llvm::DwarfDebug*, llvm::DIType)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:593:0
>>> #9 0x207f300 isUnsignedDIType(llvm::DwarfDebug*, llvm::DIType)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:594:0
>>> #10 0x207f8a4 llvm::DwarfUnit::addConstantValue(llvm::DIE&,
>>> llvm::MachineOperand const&, llvm::DIType)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp:686:0
>>> #11 0x20ad32e
>>> llvm::DwarfCompileUnit::constructVariableDIEImpl(llvm::DbgVariable const&,
>>> bool) ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:508:0
>>> #12 0x20ad081
>>> llvm::DwarfCompileUnit::constructVariableDIE(llvm::DbgVariable&, bool)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:472:0
>>> #13 0x20ad50f
>>> llvm::DwarfCompileUnit::constructVariableDIE(llvm::DbgVariable&,
>>> llvm::LexicalScope const&, llvm::DIE*&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:535:0
>>> #14 0x20ad623
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:546:0
>>> #15 0x20ac41c llvm::DwarfCompileUnit::constructScopeDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:346:0
>>> #16 0x20ad6f0
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:550:0
>>> #17 0x20ac41c llvm::DwarfCompileUnit::constructScopeDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:346:0
>>> #18 0x20ad6f0
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:550:0
>>> #19 0x20ac3cd llvm::DwarfCompileUnit::constructScopeDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:333:0
>>> #20 0x20ad6f0
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:550:0
>>> #21 0x20ac41c llvm::DwarfCompileUnit::constructScopeDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:346:0
>>> #22 0x20ad6f0
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:550:0
>>> #23 0x20ac41c llvm::DwarfCompileUnit::constructScopeDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:346:0
>>> #24 0x20ad6f0
>>> llvm::DwarfCompileUnit::createScopeChildrenDIE(llvm::LexicalScope*,
>>> llvm::SmallVectorImpl<std::unique_ptr<llvm::DIE,
>>> std::default_delete<llvm::DIE> > >&, unsigned int*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:550:0
>>> #25 0x20ada2d
>>> llvm::DwarfCompileUnit::createAndAddScopeChildren(llvm::LexicalScope*,
>>> llvm::DIE&) ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:593:0
>>> #26 0x20ad8f1
>>> llvm::DwarfCompileUnit::constructSubprogramScopeDIE(llvm::LexicalScope*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:577:0
>>> #27 0x20562e7 llvm::DwarfDebug::endFunction(llvm::MachineFunction const*)
>>> ./llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:1306:0
>>> #28 0x203ec5a llvm::AsmPrinter::EmitFunctionBody()
>>> ./llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:887:0
>>> #29 0x12c03dd llvm::AsmPrinter::runOnMachineFunction(llvm::MachineFunction&)
>>> ./llvm/include/llvm/CodeGen/AsmPrinter.h:189:0
>>> #30 0x12c0604 (anonymous
>>> namespace)::AArch64AsmPrinter::runOnMachineFunction(llvm::MachineFunction&)
>>> ./llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp:89:0
>>> #31 0x1661c9d llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
>>> ./llvm/lib/CodeGen/MachineFunctionPass.cpp:34:0
>>> #32 0x198a476 llvm::FPPassManager::runOnFunction(llvm::Function&)
>>> ./llvm/lib/IR/LegacyPassManager.cpp:1530:0
>>> #33 0x198a5e6 llvm::FPPassManager::runOnModule(llvm::Module&)
>>> ./llvm/lib/IR/LegacyPassManager.cpp:1550:0
>>> #34 0x198a904 (anonymous
>>> namespace)::MPPassManager::runOnModule(llvm::Module&)
>>> ./llvm/lib/IR/LegacyPassManager.cpp:1608:0
>>> #35 0x198afa8 llvm::legacy::PassManagerImpl::run(llvm::Module&)
>>> ./llvm/lib/IR/LegacyPassManager.cpp:1715:0
>>> #36 0x198b1c7 llvm::legacy::PassManager::run(llvm::Module&)
>>> ./llvm/lib/IR/LegacyPassManager.cpp:1749:0
>>> #37 0x2292b3b (anonymous
>>> namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
>>> llvm::raw_ostream*) ./llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:634:0
>>> #38 0x2292c0a clang::EmitBackendOutput(clang::DiagnosticsEngine&,
>>> clang::CodeGenOptions const&, clang::TargetOptions const&,
>>> clang::LangOptions const&, llvm::StringRef, llvm::Module*,
>>> clang::BackendAction, llvm::raw_ostream*)
>>> ./llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:650:0
>>> #39 0x22785ec
>>> clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
>>> ./llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:178:0
>>> #40 0x2caa57a clang::ParseAST(clang::Sema&, bool, bool)
>>> ./llvm/tools/clang/lib/Parse/ParseAST.cpp:153:0
>>> #41 0x1f24938 clang::ASTFrontendAction::ExecuteAction()
>>> ./llvm/tools/clang/lib/Frontend/FrontendAction.cpp:528:0
>>> #42 0x227aab7 clang::CodeGenAction::ExecuteAction()
>>> ./llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:728:0
>>> #43 0x1f24413 clang::FrontendAction::Execute()
>>> ./llvm/tools/clang/lib/Frontend/FrontendAction.cpp:432:0
>>> #44 0x1eeda94 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
>>> ./llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:812:0
>>> #45 0x20356b5 clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
>>> ./llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:222:0
>>> #46 0x10d8d66 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
>>> ./llvm/tools/clang/tools/driver/cc1_main.cpp:110:0
>>> #47 0x10d1522 ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) .
>>> /llvm/tools/clang/tools/driver/driver.cpp:369:0
>>> #48 0x10d1b04 main ./llvm/tools/clang/tools/driver/driver.cpp:415:0
>>> #49 0x7ffaa3171ec5 __libc_start_main
>>> /build/buildd/eglibc-2.19/csu/libc-start.c:321:0
>>> #50 0x10ce559 _start (./llvm/2build/bin/clang-3.7+0x10ce559)
>>>
>>>>> -----Original Message-----
>>>>> From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-
>>>>> bounces at cs.uiuc.edu] On Behalf Of Adrian Prantl
>>>>> Sent: 2015年1月21日 3:42
>>>>> To: llvm-commits at cs.uiuc.edu
>>>>> Subject: [llvm] r226598 - Reapply: Teach SROA how to update debug info for
>>>>> fragmented variables.
>>>>>
>>>>> Author: adrian
>>>>> Date: Tue Jan 20 13:42:22 2015
>>>>> New Revision: 226598
>>>>>
>>>>> URL: http://llvm.org/viewvc/llvm-project?rev=226598&view=rev
>>>>> Log:
>>>>> Reapply: Teach SROA how to update debug info for fragmented variables.
>>>>> This reapplies r225379.
>>>>>
>>>>> ChangeLog:
>>>>> - The assertion that this commit previously ran into about the inability
>>>>> to handle indirect variables has since been removed and the backend
>>>>> can handle this now.
>>>>> - Testcases were upgrade to the new MDLocation format.
>>>>> - Instead of keeping a DebugDeclares map, we now use
>>>>> llvm::FindAllocaDbgDeclare().
>>>>>
>>>>> Original commit message follows.
>>>>>
>>>>> Debug info: Teach SROA how to update debug info for fragmented variables.
>>>>> This allows us to generate debug info for extremely advanced code such as
>>>>>
>>>>> typedef struct { long int a; int b;} S;
>>>>>
>>>>> int foo(S s) {
>>>>> return s.b;
>>>>> }
>>>>>
>>>>> which at -O1 on x86_64 is codegen'd into
>>>>>
>>>>> define i32 @foo(i64 %s.coerce0, i32 %s.coerce1) #0 {
>>>>> ret i32 %s.coerce1, !dbg !24
>>>>> }
>>>>>
>>>>> with this patch we emit the following debug info for this
>>>>>
>>>>> TAG_formal_parameter [3]
>>>>> AT_location( 0x00000000
>>>>> 0x0000000000000000 - 0x0000000000000006: rdi, piece
>>>>> 0x00000008, rsi, piece 0x00000004
>>>>> 0x0000000000000006 - 0x0000000000000008: rdi, piece
>>>>> 0x00000008, rax, piece 0x00000004 )
>>>>> AT_name( "s" )
>>>>> AT_decl_file(
>>> "/Volumes/Data/llvm/_build.ninja.release/test.c" )
>>>>>
>>>>> Thanks to chandlerc, dblaikie, and echristo for their feedback on all
>>> previous
>>>>> iterations of this patch!
>>>>>
>>>>> Added:
>>>>> llvm/trunk/test/DebugInfo/X86/sroasplit-1.ll
>>>>> llvm/trunk/test/DebugInfo/X86/sroasplit-2.ll
>>>>> llvm/trunk/test/DebugInfo/X86/sroasplit-3.ll
>>>>> Modified:
>>>>> llvm/trunk/lib/Transforms/Scalar/SROA.cpp
>>>>> llvm/trunk/test/DebugInfo/X86/array2.ll
>>>>>
>>>>> Modified: llvm/trunk/lib/Transforms/Scalar/SROA.cpp
>>>>> URL: http://llvm.org/viewvc/llvm-
>>>>> project/llvm/trunk/lib/Transforms/Scalar/SROA.cpp?rev=226598&r1=226597
>>>>> &r2=226598&view=diff
>>>>> ===============================================================
>>>>> ===============
>>>>> --- llvm/trunk/lib/Transforms/Scalar/SROA.cpp (original)
>>>>> +++ llvm/trunk/lib/Transforms/Scalar/SROA.cpp Tue Jan 20 13:42:22 2015
>>>>> @@ -1257,8 +1257,8 @@ private:
>>>>> friend class AllocaSliceRewriter;
>>>>>
>>>>> bool presplitLoadsAndStores(AllocaInst &AI, AllocaSlices &AS);
>>>>> - bool rewritePartition(AllocaInst &AI, AllocaSlices &AS,
>>>>> - AllocaSlices::Partition &P);
>>>>> + AllocaInst *rewritePartition(AllocaInst &AI, AllocaSlices &AS,
>>>>> + AllocaSlices::Partition &P);
>>>>> bool splitAlloca(AllocaInst &AI, AllocaSlices &AS);
>>>>> bool runOnAlloca(AllocaInst &AI);
>>>>> void clobberUse(Use &U);
>>>>> @@ -3964,8 +3964,8 @@ bool SROA::presplitLoadsAndStores(Alloca
>>>>> /// appropriate new offsets. It also evaluates how successful the rewrite
>>> was
>>>>> /// at enabling promotion and if it was successful queues the alloca to be
>>> ///
>>>>> promoted.
>>>>> -bool SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
>>>>> - AllocaSlices::Partition &P) {
>>>>> +AllocaInst *SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
>>>>> + AllocaSlices::Partition &P) {
>>>>> // Try to compute a friendly type for this partition of the alloca.
>>> This
>>>>> // won't always succeed, in which case we fall back to a legal integer
>>> type
>>>>> // or an i8 array of an appropriate size.
>>>>> @@ -4003,6 +4003,7 @@ bool SROA::rewritePartition(AllocaInst &
>>>>> NewAI = &AI;
>>>>> // FIXME: We should be able to bail at this point with "nothing
>>> changed".
>>>>> // FIXME: We might want to defer PHI speculation until after here.
>>>>> + // FIXME: return nullptr;
>>>>> } else {
>>>>> unsigned Alignment = AI.getAlignment();
>>>>> if (!Alignment) {
>>>>> @@ -4098,7 +4099,7 @@ bool SROA::rewritePartition(AllocaInst &
>>>>> PostPromotionWorklist.pop_back();
>>>>> }
>>>>>
>>>>> - return true;
>>>>> + return NewAI;
>>>>> }
>>>>>
>>>>> /// \brief Walks the slices of an alloca and form partitions based on
>>> them,
>>>>> @@ -4137,9 +4138,24 @@ bool SROA::splitAlloca(AllocaInst &AI, A
>>>>> if (!IsSorted)
>>>>> std::sort(AS.begin(), AS.end());
>>>>>
>>>>> + /// \brief Describes the allocas introduced by rewritePartition ///
>>>>> + in order to migrate the debug info.
>>>>> + struct Piece {
>>>>> + AllocaInst *Alloca;
>>>>> + uint64_t Offset;
>>>>> + uint64_t Size;
>>>>> + Piece(AllocaInst *AI, uint64_t O, uint64_t S)
>>>>> + : Alloca(AI), Offset(O), Size(S) {} }; SmallVector<Piece, 4>
>>>>> + Pieces;
>>>>> +
>>>>> // Rewrite each partition.
>>>>> for (auto &P : AS.partitions()) {
>>>>> - Changed |= rewritePartition(AI, AS, P);
>>>>> + if (AllocaInst *NewAI = rewritePartition(AI, AS, P)) {
>>>>> + Changed = true;
>>>>> + if (NewAI != &AI)
>>>>> + Pieces.push_back(Piece(NewAI, P.beginOffset(), P.size()));
>>>>> + }
>>>>> ++NumPartitions;
>>>>> }
>>>>>
>>>>> @@ -4147,6 +4163,28 @@ bool SROA::splitAlloca(AllocaInst &AI, A
>>>>> MaxPartitionsPerAlloca =
>>>>> std::max<unsigned>(NumPartitions, MaxPartitionsPerAlloca);
>>>>>
>>>>> + // Migrate debug information from the old alloca to the new alloca(s)
>>>>> + // and the individial partitions.
>>>>> + if (DbgDeclareInst *DbgDecl = FindAllocaDbgDeclare(&AI)) {
>>>>> + DIVariable Var(DbgDecl->getVariable());
>>>>> + DIExpression Expr(DbgDecl->getExpression());
>>>>> + DIBuilder DIB(*AI.getParent()->getParent()->getParent(),
>>>>> + /*AllowUnresolved*/ false);
>>>>> + bool IsSplit = Pieces.size() > 1;
>>>>> + for (auto Piece : Pieces) {
>>>>> + // Create a piece expression describing the new partition or reuse
>>> AI's
>>>>> + // expression if there is only one partition.
>>>>> + if (IsSplit)
>>>>> + Expr = DIB.createPieceExpression(Piece.Offset, Piece.Size);
>>>>> +
>>>>> + // Remove any existing dbg.declare intrinsic describing the same
>>> alloca.
>>>>> + if (DbgDeclareInst *OldDDI = FindAllocaDbgDeclare(Piece.Alloca))
>>>>> + OldDDI->eraseFromParent();
>>>>> +
>>>>> + Instruction *NewDDI = DIB.insertDeclare(Piece.Alloca, Var, Expr,
>>> &AI);
>>>>> + NewDDI->setDebugLoc(DbgDecl->getDebugLoc());
>>>>> + }
>>>>> + }
>>>>> return Changed;
>>>>> }
>>>>>
>>>>> @@ -4258,8 +4296,11 @@ void SROA::deleteDeadInstructions(
>>>>> DeadInsts.insert(U);
>>>>> }
>>>>>
>>>>> - if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
>>>>> + if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) {
>>>>> DeletedAllocas.insert(AI);
>>>>> + if (DbgDeclareInst *DbgDecl = FindAllocaDbgDeclare(AI))
>>>>> + DbgDecl->eraseFromParent();
>>>>> + }
>>>>>
>>>>> ++NumDeleted;
>>>>> I->eraseFromParent();
>>>>> @@ -4376,9 +4417,10 @@ bool SROA::runOnFunction(Function &F) {
>>>>>
>>>>> BasicBlock &EntryBB = F.getEntryBlock();
>>>>> for (BasicBlock::iterator I = EntryBB.begin(), E =
>>> std::prev(EntryBB.end());
>>>>> - I != E; ++I)
>>>>> + I != E; ++I) {
>>>>> if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
>>>>> Worklist.insert(AI);
>>>>> + }
>>>>>
>>>>> bool Changed = false;
>>>>> // A set of deleted alloca instruction pointers which should be removed
>>> from
>>>>>
>>>>> Modified: llvm/trunk/test/DebugInfo/X86/array2.ll
>>>>> URL: http://llvm.org/viewvc/llvm-
>>>>> project/llvm/trunk/test/DebugInfo/X86/array2.ll?rev=226598&r1=226597&r2
>>>>> =226598&view=diff
>>>>> ===============================================================
>>>>> ===============
>>>>> --- llvm/trunk/test/DebugInfo/X86/array2.ll (original)
>>>>> +++ llvm/trunk/test/DebugInfo/X86/array2.ll Tue Jan 20 13:42:22 2015
>>>>> @@ -13,12 +13,12 @@
>>>>> ; }
>>>>> ;
>>>>> ; RUN: opt %s -O2 -S -o - | FileCheck %s -; Test that we do not lower
>>>>> dbg.declares for arrays.
>>>>> +; Test that we correctly lower dbg.declares for arrays.
>>>>> ;
>>>>> ; CHECK: define i32 @main
>>>>> -; CHECK: call void @llvm.dbg.value
>>>>> -; CHECK: call void @llvm.dbg.value
>>>>> -; CHECK: call void @llvm.dbg.declare
>>>>> +; CHECK: call void @llvm.dbg.value(metadata i32 42, i64 0, metadata
>>>>> +![[ARRAY:[0-9]+]], metadata ![[EXPR:[0-9]+]]) ; CHECK: ![[ARRAY]] =
>>>>> +{{.*}}; [ DW_TAG_auto_variable ] [array] [line 6] ; CHECK: ![[EXPR]] =
>>>>> +{{.*}}; [ DW_TAG_expression ] [DW_OP_piece offset=0, size=4]
>>>>> target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
>>>>> target triple = "x86_64-apple-macosx10.9.0"
>>>>>
>>>>>
>>>>> Added: llvm/trunk/test/DebugInfo/X86/sroasplit-1.ll
>>>>> URL: http://llvm.org/viewvc/llvm-
>>>>> project/llvm/trunk/test/DebugInfo/X86/sroasplit-1.ll?rev=226598&view=auto
>>>>> ===============================================================
>>>>> ===============
>>>>> --- llvm/trunk/test/DebugInfo/X86/sroasplit-1.ll (added)
>>>>> +++ llvm/trunk/test/DebugInfo/X86/sroasplit-1.ll Tue Jan 20 13:42:22
>>>>> +++ 2015
>>>>> @@ -0,0 +1,97 @@
>>>>> +; RUN: opt %s -sroa -verify -S -o - | FileCheck %s ; ; Test that we can
>>>>> +partial emit debug info for aggregates repeatedly ; split up by SROA.
>>>>> +;
>>>>> +; // Compile with -O1
>>>>> +; typedef struct {
>>>>> +; int a;
>>>>> +; long int b;
>>>>> +; } Inner;
>>>>> +;
>>>>> +; typedef struct {
>>>>> +; Inner inner[2];
>>>>> +; } Outer;
>>>>> +;
>>>>> +; int foo(Outer outer) {
>>>>> +; Inner i1 = outer.inner[1];
>>>>> +; return i1.a;
>>>>> +; }
>>>>> +;
>>>>> +
>>>>> +; Verify that SROA creates a variable piece when splitting i1.
>>>>> +; CHECK: %[[I1:.*]] = alloca [12 x i8], align 4 ; CHECK: call void
>>>>> + at llvm.dbg.declare(metadata [12 x i8]* %[[I1]], metadata
>>>>> +![[VAR:[0-9]+]], metadata ![[PIECE1:[0-9]+]]) ; CHECK: call void
>>>>> + at llvm.dbg.value(metadata i32 %[[A:.*]], i64 0, metadata ![[VAR]],
>>>>> +metadata ![[PIECE2:[0-9]+]]) ; CHECK: ret i32 %[[A]] ; Read Var and
>>> Piece:
>>>>> +; CHECK: ![[VAR]] = {{.*}} ; [ DW_TAG_auto_variable ] [i1] [line 11] ;
>>>>> +CHECK: ![[PIECE1]] = {{.*}} ; [ DW_TAG_expression ] [DW_OP_piece
>>>>> +offset=4, size=12] ; CHECK: ![[PIECE2]] = {{.*}} ; [ DW_TAG_expression
>>>>> +] [DW_OP_piece offset=0, size=4]
>>>>> +
>>>>> +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
>>>>> +target triple = "x86_64-apple-macosx10.9.0"
>>>>> +
>>>>> +%struct.Outer = type { [2 x %struct.Inner] } %struct.Inner = type {
>>>>> +i32, i64 }
>>>>> +
>>>>> +; Function Attrs: nounwind ssp uwtable
>>>>> +define i32 @foo(%struct.Outer* byval align 8 %outer) #0 {
>>>>> +entry:
>>>>> + %i1 = alloca %struct.Inner, align 8
>>>>> + call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata
>>>>> +!25, metadata !2), !dbg !26
>>>>> + call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata
>>>>> +!27, metadata !2), !dbg !28
>>>>> + %inner = getelementptr inbounds %struct.Outer* %outer, i32 0, i32 0,
>>>>> +!dbg !28
>>>>> + %arrayidx = getelementptr inbounds [2 x %struct.Inner]* %inner, i32
>>>>> +0, i64 1, !dbg !28
>>>>> + %0 = bitcast %struct.Inner* %i1 to i8*, !dbg !28
>>>>> + %1 = bitcast %struct.Inner* %arrayidx to i8*, !dbg !28
>>>>> + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 16, i32 8,
>>>>> +i1 false), !dbg !28
>>>>> + %a = getelementptr inbounds %struct.Inner* %i1, i32 0, i32 0, !dbg
>>>>> +!29
>>>>> + %2 = load i32* %a, align 4, !dbg !29
>>>>> + ret i32 %2, !dbg !29
>>>>> +}
>>>>> +
>>>>> +; Function Attrs: nounwind readnone
>>>>> +declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
>>>>> +
>>>>> +; Function Attrs: nounwind
>>>>> +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture
>>>>> +readonly, i64, i32, i1) #2
>>>>> +
>>>>> +attributes #0 = { nounwind ssp uwtable } attributes #1 = { nounwind
>>>>> +readnone } attributes #2 = { nounwind }
>>>>> +
>>>>> +!llvm.dbg.cu = !{!0}
>>>>> +!llvm.module.flags = !{!22, !23}
>>>>> +!llvm.ident = !{!24}
>>>>> +
>>>>> +!0 = !{!"0x11\0012\00clang version 3.5.0 \000\00\000\00\001", !1, !2,
>>>>> +!2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [ DW_TAG_compile_unit ]
>>>>> +[sroasplit-1.c] [DW_LANG_C99]
>>>>> +!1 = !{!"sroasplit-1.c", !""}
>>>>> +!2 = !{}
>>>>> +!3 = !{!4}
>>>>> +!4 = !{!"0x2e\00foo\00foo\00\0010\000\001\000\006\00256\000\0010", !1,
>>>>> +!5, !6, null, i32 (%struct.Outer*)* @foo, null, null, !2} ; [
>>>>> +DW_TAG_subprogram ] [ DW_TAG_subprogram ] [line 10] [def] [foo]
>>>>> +!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [ DW_TAG_file_type ]
>>>>> +[sroasplit-1.c]
>>>>> +!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null,
>>>>> +null, null} ; [ DW_TAG_subroutine_type ] [ DW_TAG_subroutine_type ]
>>>>> +[line 0, size 0, align 0, offset 0] [from ]
>>>>> +!7 = !{!8, !9}
>>>>> +!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [
>>>>> +DW_TAG_base_type ] [ DW_TAG_base_type ] [int] [line 0, size 32, align
>>>>> +32, offset 0, enc DW_ATE_signed]
>>>>> +!9 = !{!"0x16\00Outer\008\000\000\000\000", !1, null, !10} ; [
>>>>> +DW_TAG_typedef ] [ DW_TAG_typedef ] [Outer] [line 8, size 0, align 0,
>>>>> +offset 0] [from ]
>>>>> +!10 = !{!"0x13\00\006\00256\0064\000\000\000", !1, null, null, !11,
>>>>> +null, null, null} ; [ DW_TAG_structure_type ] [line 6, size 256, align
>>>>> +64, offset 0] [def] [from ]
>>>>> +!11 = !{!12}
>>>>> +!12 = !{!"0xd\00inner\007\00256\0064\000\000", !1, !10, !13} ; [
>>>>> +DW_TAG_member ] [inner] [line 7, size 256, align 64, offset 0] [from ]
>>>>> +!13 = !{!"0x1\00\000\00256\0064\000\000", null, null, !14, !20, i32 0,
>>>>> +null, null, null} ; [ DW_TAG_array_type ] [line 0, size 256, align 64,
>>>>> +offset 0] [from Inner]
>>>>> +!14 = !{!"0x16\00Inner\004\000\000\000\000", !1, null, !15} ; [
>>>>> +DW_TAG_typedef ] [ DW_TAG_typedef ] [Inner] [line 4, size 0, align 0,
>>>>> +offset 0] [from ]
>>>>> +!15 = !{!"0x13\00\001\00128\0064\000\000\000", !1, null, null, !16,
>>>>> +null, null, null} ; [ DW_TAG_structure_type ] [line 1, size 128, align
>>>>> +64, offset 0] [def] [from ]
>>>>> +!16 = !{!17, !18}
>>>>> +!17 = !{!"0xd\00a\002\0032\0032\000\000", !1, !15, !8} ; [
>>>>> +DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
>>>>> +!18 = !{!"0xd\00b\003\0064\0064\0064\000", !1, !15, !19} ; [
>>>>> +DW_TAG_member ] [b] [line 3, size 64, align 64, offset 64] [from long
>>>>> +int]
>>>>> +!19 = !{!"0x24\00long int\000\0064\0064\000\000\005", null, null} ; [
>>>>> +DW_TAG_base_type ] [ DW_TAG_base_type ] [long int] [line 0, size 64,
>>>>> +align 64, offset 0, enc DW_ATE_signed]
>>>>> +!20 = !{!21}
>>>>> +!21 = !{!"0x21\000\002"} ; [ DW_TAG_subrange_type ] [0, 1]
>>>>> +!22 = !{i32 2, !"Dwarf Version", i32 2}
>>>>> +!23 = !{i32 1, !"Debug Info Version", i32 2}
>>>>> +!24 = !{!"clang version 3.5.0 "}
>>>>> +!25 = !{!"0x101\00outer\0016777226\000", !4, !5, !9} ; [
>>>>> +DW_TAG_arg_variable ] [ DW_TAG_arg_variable ] [outer] [line 10]
>>>>> +!26 = !MDLocation(line: 10, scope: !4)
>>>>> +!27 = !{!"0x100\00i1\0011\000", !4, !5, !14} ; [ DW_TAG_auto_variable ]
>>>>> +[ DW_TAG_auto_variable ] [i1] [line 11]
>>>>> +!28 = !MDLocation(line: 11, scope: !4)
>>>>> +!29 = !MDLocation(line: 12, scope: !4)
>>>>>
>>>>> Added: llvm/trunk/test/DebugInfo/X86/sroasplit-2.ll
>>>>> URL: http://llvm.org/viewvc/llvm-
>>>>> project/llvm/trunk/test/DebugInfo/X86/sroasplit-2.ll?rev=226598&view=auto
>>>>> ===============================================================
>>>>> ===============
>>>>> --- llvm/trunk/test/DebugInfo/X86/sroasplit-2.ll (added)
>>>>> +++ llvm/trunk/test/DebugInfo/X86/sroasplit-2.ll Tue Jan 20 13:42:22
>>>>> +++ 2015
>>>>> @@ -0,0 +1,102 @@
>>>>> +; RUN: opt %s -sroa -verify -S -o - | FileCheck %s ; ; Test that we can
>>>>> +partial emit debug info for aggregates repeatedly ; split up by SROA.
>>>>> +;
>>>>> +; // Compile with -O1
>>>>> +; typedef struct {
>>>>> +; int a;
>>>>> +; int b;
>>>>> +; } Inner;
>>>>> +;
>>>>> +; typedef struct {
>>>>> +; Inner inner[2];
>>>>> +; } Outer;
>>>>> +;
>>>>> +; int foo(Outer outer) {
>>>>> +; Inner i1 = outer.inner[1];
>>>>> +; return i1.a;
>>>>> +; }
>>>>> +;
>>>>> +
>>>>> +; Verify that SROA creates a variable piece when splitting i1.
>>>>> +; CHECK: call void @llvm.dbg.value(metadata i64 %outer.coerce0, i64 0,
>>>>> +metadata ![[O:[0-9]+]], metadata ![[PIECE1:[0-9]+]]), ; CHECK: call
>>>>> +void @llvm.dbg.value(metadata i64 %outer.coerce1, i64 0, metadata
>>>>> +![[O]], metadata ![[PIECE2:[0-9]+]]), ; CHECK: call void
>>>>> + at llvm.dbg.value({{.*}}, i64 0, metadata ![[I1:[0-9]+]], metadata
>>>>> +![[PIECE3:[0-9]+]]), ; CHECK-DAG: ![[O]] = {{.*}} [ DW_TAG_arg_variable
>>>>> +] [outer] [line 10] ; CHECK-DAG: ![[PIECE1]] = {{.*}} [
>>>>> +DW_TAG_expression ] [DW_OP_piece offset=0, size=8] ; CHECK-DAG:
>>>>> +![[PIECE2]] = {{.*}} [ DW_TAG_expression ] [DW_OP_piece offset=8,
>>>>> +size=8] ; CHECK-DAG: ![[I1]] = {{.*}} [ DW_TAG_auto_variable ] [i1]
>>>>> +[line 11] ; CHECK-DAG: ![[PIECE3]] = {{.*}} [ DW_TAG_expression ]
>>>>> +[DW_OP_piece offset=0, size=4]
>>>>> +
>>>>> +; ModuleID = 'sroasplit-2.c'
>>>>> +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
>>>>> +target triple = "x86_64-apple-macosx10.9.0"
>>>>> +
>>>>> +%struct.Outer = type { [2 x %struct.Inner] } %struct.Inner = type {
>>>>> +i32, i32 }
>>>>> +
>>>>> +; Function Attrs: nounwind ssp uwtable
>>>>> +define i32 @foo(i64 %outer.coerce0, i64 %outer.coerce1) #0 {
>>>>> + %outer = alloca %struct.Outer, align 8
>>>>> + %i1 = alloca %struct.Inner, align 4
>>>>> + %1 = bitcast %struct.Outer* %outer to { i64, i64 }*
>>>>> + %2 = getelementptr { i64, i64 }* %1, i32 0, i32 0
>>>>> + store i64 %outer.coerce0, i64* %2
>>>>> + %3 = getelementptr { i64, i64 }* %1, i32 0, i32 1
>>>>> + store i64 %outer.coerce1, i64* %3
>>>>> + call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata
>>>>> +!24, metadata !2), !dbg !25
>>>>> + call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata
>>>>> +!26, metadata !2), !dbg !27
>>>>> + %4 = getelementptr inbounds %struct.Outer* %outer, i32 0, i32 0, !dbg
>>>>> +!27
>>>>> + %5 = getelementptr inbounds [2 x %struct.Inner]* %4, i32 0, i64 1,
>>>>> +!dbg !27
>>>>> + %6 = bitcast %struct.Inner* %i1 to i8*, !dbg !27
>>>>> + %7 = bitcast %struct.Inner* %5 to i8*, !dbg !27
>>>>> + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %6, i8* %7, i64 8, i32 4, i1
>>>>> +false), !dbg !27
>>>>> + %8 = getelementptr inbounds %struct.Inner* %i1, i32 0, i32 0, !dbg
>>>>> +!28
>>>>> + %9 = load i32* %8, align 4, !dbg !28
>>>>> + ret i32 %9, !dbg !28
>>>>> +}
>>>>> +
>>>>> +; Function Attrs: nounwind readnone
>>>>> +declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
>>>>> +
>>>>> +; Function Attrs: nounwind
>>>>> +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture
>>>>> +readonly, i64, i32, i1) #2
>>>>> +
>>>>> +attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" }
>>>>> +attributes #1 = { nounwind readnone } attributes #2 = { nounwind }
>>>>> +
>>>>> +!llvm.dbg.cu = !{!0}
>>>>> +!llvm.module.flags = !{!21, !22}
>>>>> +!llvm.ident = !{!23}
>>>>> +
>>>>> +!0 = !{!"0x11\0012\00clang version 3.5.0 \000\00\000\00\001", !1, !2,
>>>>> +!2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [ DW_TAG_compile_unit ]
>>>>> +[sroasplit-2.c] [DW_LANG_C99]
>>>>> +!1 = !{!"sroasplit-2.c", !""}
>>>>> +!2 = !{}
>>>>> +!3 = !{!4}
>>>>> +!4 = !{!"0x2e\00foo\00foo\00\0010\000\001\000\006\00256\000\0010", !1,
>>>>> +!5, !6, null, i32 (i64, i64)* @foo, null, null, !2} ; [
>>>>> +DW_TAG_subprogram ] [ DW_TAG_subprogram ] [line 10] [def] [foo]
>>>>> +!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [ DW_TAG_file_type ]
>>>>> +[sroasplit-2.c]
>>>>> +!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null,
>>>>> +null, null} ; [ DW_TAG_subroutine_type ] [ DW_TAG_subroutine_type ]
>>>>> +[line 0, size 0, align 0, offset 0] [from ]
>>>>> +!7 = !{!8, !9}
>>>>> +!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [
>>>>> +DW_TAG_base_type ] [ DW_TAG_base_type ] [int] [line 0, size 32, align
>>>>> +32, offset 0, enc DW_ATE_signed]
>>>>> +!9 = !{!"0x16\00Outer\008\000\000\000\000", !1, null, !10} ; [
>>>>> +DW_TAG_typedef ] [ DW_TAG_typedef ] [Outer] [line 8, size 0, align 0,
>>>>> +offset 0] [from ]
>>>>> +!10 = !{!"0x13\00\006\00128\0032\000\000\000", !1, null, null, !11,
>>>>> +null, null, null} ; [ DW_TAG_structure_type ] [line 6, size 128, align
>>>>> +32, offset 0] [def] [from ]
>>>>> +!11 = !{!12}
>>>>> +!12 = !{!"0xd\00inner\007\00128\0032\000\000", !1, !10, !13} ; [
>>>>> +DW_TAG_member ] [inner] [line 7, size 128, align 32, offset 0] [from ]
>>>>> +!13 = !{!"0x1\00\000\00128\0032\000\000", null, null, !14, !19, i32 0,
>>>>> +null, null, null} ; [ DW_TAG_array_type ] [line 0, size 128, align 32,
>>>>> +offset 0] [from Inner]
>>>>> +!14 = !{!"0x16\00Inner\004\000\000\000\000", !1, null, !15} ; [
>>>>> +DW_TAG_typedef ] [ DW_TAG_typedef ] [Inner] [line 4, size 0, align 0,
>>>>> +offset 0] [from ]
>>>>> +!15 = !{!"0x13\00\001\0064\0032\000\000\000", !1, null, null, !16,
>>>>> +null, null, null} ; [ DW_TAG_structure_type ] [line 1, size 64, align
>>>>> +32, offset 0] [def] [from ]
>>>>> +!16 = !{!17, !18}
>>>>> +!17 = !{!"0xd\00a\002\0032\0032\000\000", !1, !15, !8} ; [
>>>>> +DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
>>>>> +!18 = !{!"0xd\00b\003\0032\0032\0032\000", !1, !15, !8} ; [
>>>>> +DW_TAG_member ] [b] [line 3, size 32, align 32, offset 32] [from int]
>>>>> +!19 = !{!20}
>>>>> +!20 = !{!"0x21\000\002"} ; [ DW_TAG_subrange_type ] [0, 1]
>>>>> +!21 = !{i32 2, !"Dwarf Version", i32 2}
>>>>> +!22 = !{i32 1, !"Debug Info Version", i32 2}
>>>>> +!23 = !{!"clang version 3.5.0 "}
>>>>> +!24 = !{!"0x101\00outer\0016777226\000", !4, !5, !9} ; [
>>>>> +DW_TAG_arg_variable ] [ DW_TAG_arg_variable ] [outer] [line 10]
>>>>> +!25 = !MDLocation(line: 10, scope: !4)
>>>>> +!26 = !{!"0x100\00i1\0011\000", !4, !5, !14} ; [ DW_TAG_auto_variable ]
>>>>> +[ DW_TAG_auto_variable ] [i1] [line 11]
>>>>> +!27 = !MDLocation(line: 11, scope: !4)
>>>>> +!28 = !MDLocation(line: 12, scope: !4)
>>>>>
>>>>> Added: llvm/trunk/test/DebugInfo/X86/sroasplit-3.ll
>>>>> URL: http://llvm.org/viewvc/llvm-
>>>>> project/llvm/trunk/test/DebugInfo/X86/sroasplit-3.ll?rev=226598&view=auto
>>>>> ===============================================================
>>>>> ===============
>>>>> --- llvm/trunk/test/DebugInfo/X86/sroasplit-3.ll (added)
>>>>> +++ llvm/trunk/test/DebugInfo/X86/sroasplit-3.ll Tue Jan 20 13:42:22
>>>>> +++ 2015
>>>>> @@ -0,0 +1,63 @@
>>>>> +; RUN: opt %s -sroa -verify -S -o - | FileCheck %s ; ModuleID =
>>>>> +'test.c'
>>>>> +; Test that SROA updates the debug info correctly if an alloca was
>>>>> +rewritten but ; not partitioned into multiple allocas.
>>>>> +;
>>>>> +; CHECK: call void @llvm.dbg.value(metadata float %s.coerce, i64 0,
>>>>> +metadata ![[VAR:[0-9]+]], metadata ![[EXPR:[0-9]+]]) ; CHECK: ![[VAR]]
>>>>> += {{.*}} [ DW_TAG_arg_variable ] [s] [line 3] ; CHECK: ![[EXPR]] =
>>>>> +{{.*}} [ DW_TAG_expression ] ; CHECK-NOT: DW_OP_piece
>>>>> +
>>>>> +;
>>>>> +; struct S { float f; };
>>>>> +;
>>>>> +; float foo(struct S s) {
>>>>> +; return s.f;
>>>>> +; }
>>>>> +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
>>>>> +target triple = "x86_64-apple-macosx10.10.0"
>>>>> +
>>>>> +%struct.S = type { float }
>>>>> +
>>>>> +; Function Attrs: nounwind ssp uwtable
>>>>> +define float @foo(float %s.coerce) #0 {
>>>>> +entry:
>>>>> + %s = alloca %struct.S, align 4
>>>>> + %coerce.dive = getelementptr %struct.S* %s, i32 0, i32 0
>>>>> + store float %s.coerce, float* %coerce.dive, align 1
>>>>> + call void @llvm.dbg.declare(metadata %struct.S* %s, metadata !16,
>>>>> +metadata !17), !dbg !18
>>>>> + %f = getelementptr inbounds %struct.S* %s, i32 0, i32 0, !dbg !19
>>>>> + %0 = load float* %f, align 4, !dbg !19
>>>>> + ret float %0, !dbg !19
>>>>> +}
>>>>> +
>>>>> +; Function Attrs: nounwind readnone
>>>>> +declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
>>>>> +
>>>>> +attributes #0 = { nounwind ssp uwtable } attributes #1 = { nounwind
>>>>> +readnone }
>>>>> +
>>>>> +!llvm.dbg.cu = !{!0}
>>>>> +!llvm.module.flags = !{!12, !13, !14}
>>>>> +!llvm.ident = !{!15}
>>>>> +
>>>>> +!0 = !{!"0x11\0012\00clang version 3.6.0 \000\00\000\00\001", !1, !2,
>>>>> +!2, !3, !2, !2} ; [ DW_TAG_compile_unit ]
>>>>> +[/Volumes/Data/llvm/_build.ninja.debug/test.c] [DW_LANG_C99]
>>>>> +!1 = !{!"test.c", !"/Volumes/Data/llvm/_build.ninja.debug"}
>>>>> +!2 = !{}
>>>>> +!3 = !{!4}
>>>>> +!4
>>>>> = !{!"0x2e\00foo\00foo\00\003\000\001\000\000\00256\000\003", !1, !5, !6,
>>>>> null, float (float)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [line
>>> 3] [def]
>>>>> [foo]
>>>>> +!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ]
>>>>> [/Volumes/Data/llvm/_build.ninja.debug/test.c]
>>>>> +!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null,
>>>>> +null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0,
>>>>> +offset 0] [from ]
>>>>> +!7 = !{!8, !9}
>>>>> +!8 = !{!"0x24\00float\000\0032\0032\000\000\004", null, null} ; [
>>>>> +DW_TAG_base_type ] [float] [line 0, size 32, align 32, offset 0, enc
>>>>> +DW_ATE_float]
>>>>> +!9 = !{!"0x13\00S\001\0032\0032\000\000\000", !1, null, null, !10,
>>>>> +null, null, null} ; [ DW_TAG_structure_type ] [S] [line 1, size 32,
>>>>> +align 32, offset 0] [def] [from ]
>>>>> +!10 = !{!11}
>>>>> +!11 = !{!"0xd\00f\001\0032\0032\000\000", !1, !9, !8} ; [ DW_TAG_member
>>>>> +] [f] [line 1, size 32, align 32, offset 0] [from float]
>>>>> +!12 = !{i32 2, !"Dwarf Version", i32 2}
>>>>> +!13 = !{i32 2, !"Debug Info Version", i32 2}
>>>>> +!14 = !{i32 1, !"PIC Level", i32 2}
>>>>> +!15 = !{!"clang version 3.6.0 "}
>>>>> +!16 = !{!"0x101\00s\0016777219\000", !4, !5, !9} ; [ DW_TAG_arg_variable
>>> ]
>>>>> [s] [line 3]
>>>>> +!17 = !{!"0x102"} ; [ DW_TAG_expression ]
>>>>> +!18 = !MDLocation(line: 3, column: 20, scope: !4)
>>>>> +!19 = !MDLocation(line: 4, column: 2, scope: !4)
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> llvm-commits mailing list
>>>>> llvm-commits at cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>>>
>>>
>>>
>>>
>>
>>
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