[llvm] r226598 - Reapply: Teach SROA how to update debug info for fragmented variables.
Dimitry Andric
dimitry at andric.com
Fri Jan 23 09:02:20 PST 2015
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. Maybe there are even more aggregate types to add to this list?
-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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