r225000 - Reapply "DebugInfo: Generalize debug info location handling"
Adrian Prantl
aprantl at apple.com
Fri Jan 9 13:30:09 PST 2015
> On Jan 9, 2015, at 1:22 PM, David Blaikie <dblaikie at gmail.com> wrote:
>
>
>
> On Fri, Jan 9, 2015 at 1:04 PM, Adrian Prantl <aprantl at apple.com <mailto:aprantl at apple.com>> wrote:
>
>> On Jan 9, 2015, at 12:20 PM, David Blaikie <dblaikie at gmail.com <mailto:dblaikie at gmail.com>> wrote:
>>
>>
>>
>> On Fri, Jan 9, 2015 at 11:52 AM, Adrian Prantl <aprantl at apple.com <mailto:aprantl at apple.com>> wrote:
>> FYI: I’m hitting this assertion on today’s ToT with the following program:
>>
>> @protocol NSObject
>> @end
>> @interface NSObject <NSObject>
>> @end
>> int printf(const char * __restrict, ...);
>> struct Foo
>> {
>> int mId;
>> ~Foo(){
>> printf("~Foo(%d)\n", mId);
>> };
>> };
>> @interface TNSObject : NSObject
>> {
>> Foo _cppObjectNonAtomic;
>> }
>> @property (assign, readwrite, nonatomic) const Foo& cppObjectNonAtomic;
>> @end
>> @implementation TNSObject
>> - (id)init
>> {
>> Foo cppObject;
>> self.cppObjectNonAtomic = cppObject;
>> }
>> @end
>>
>> $ clang "-cc1" "-triple" "x86_64-apple-macosx10.10.0" "-emit-obj" "-gdwarf-2" "-stdlib=libc++" "-Os" "-fexceptions" "-x" "objective-c++" test1.mm <http://test1.mm/>
>>
>> Looks like ~Foo() is getting inlined into [TNSObject init] without the scope being updated with an InlinedAt location. I’ll keep digging.
>>
>> I'll be reverting this shortly - there's a bunch of regressions of a similar flavor recorded on the relevant bug, but any reduced test cases will be handy when trying to ensure everything's covered before I recommit.
>>
>> The 'root cause' in (almost?) all of these should be something like this:
>>
>> 1) a function with debug info (a function appearing in the CU's subprogram list) calls
>> 2) another function with debug info through
>> 3) a call instruction with no debugloc
>
> In the particular case I posted above, the problem appears to be with the call to ~Foo from within the landingpad:
>
> lpad: ; preds = %entry
> %4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
> cleanup
> %5 = extractvalue { i8*, i32 } %4, 0
> store i8* %5, i8** %exn.slot
> %6 = extractvalue { i8*, i32 } %4, 1
> store i32 %6, i32* %ehselector.slot
> invoke void @_ZN3FooD1Ev(%struct.Foo* %cppObject)
> to label %invoke.cont1 unwind label %terminate.lpad ; Note that none of the insns in the landingpad have a DebugLoc
>
> which after inlining turns into
>
> lpad: ; preds = %entry
> %3 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
> cleanup
> call void @llvm.dbg.value(metadata %struct.Foo* %cppObject, i64 0, metadata !64, metadata !76), !dbg !93
> call void @llvm.dbg.value(metadata %struct.Foo* %cppObject, i64 0, metadata !94, metadata !76), !dbg !96
> %mId.i.i3 = getelementptr inbounds %struct.Foo* %cppObject, i64 0, i32 0, !dbg !97
> %4 = load i32* %mId.i.i3, align 4, !dbg !97, !tbaa !88
> %call.i.i45 = invoke i32 (i8*, ...)* @_Z6printfPKcz(i8* getelementptr inbounds ([10 x i8]* @.str, i64 0, i64 0), i32 %4) #6
> to label %eh.resume unwind label %terminate.lpad, !dbg !97
>
> !97 = !{i32 10, i32 0, !87, !95}
> !95 = !{i32 9, i32 0, !62, null} <-- wrong. Should be _ZN3FooD2Ev inlined into _ZN3FooD1Ev
>
> One one hand this is a bug in InlineFunction.cpp:fixupLineNumbers(),
>
> What should fixupLineNumbers do instead? (but yes, we could put an assert in there to fail sooner rather than creating weird debug info like this & asserting on it later)
>
> but we could also attach DebugLocs to those instructions in CFE in the first place.
>
> My preference is to keep these assertions in as long as possible, because they find good bugs - the patch that added them took me months to commit due to all the bugs I found each time I tried to commit it, so it seems to have high value.
Keeping the assertion is fine.
It turns out that constructing a new scope for that call is not so great, because we’d have to search through the CU to find the right DISubprogram and even that may fail. I think we really should:
- update CFE to attach DebugLocs to this cleanup code, so fixupLineNumbers works correctly here
- make fixupLineNumbers delete all DebugLocs from code inlined into a call that has no DebugLoc.
-- adrian
>
> - David
>
>
> -- adrian
>
>
>
>
>>
>> When that situation is created and inlining can occur through that call, the debug info doesn't get updated with inlinedAt info and everything else is bad from there on.
>>
>> If you can produce any short test cases that demonstrate this commit causing such a call (3) to go from having a debugloc to not having a debugloc, that would be great to have.
>>
>> - David
>>
>>
>> -- adrian
>>
>>
>>> On Jan 7, 2015, at 10:30 AM, Nico Weber <thakis at chromium.org <mailto:thakis at chromium.org>> wrote:
>>>
>>> On Mon, Jan 5, 2015 at 9:57 PM, Nico Weber <thakis at chromium.org <mailto:thakis at chromium.org>> wrote:
>>> On Mon, Jan 5, 2015 at 9:07 PM, Jiangning Liu <liujiangning1 at gmail.com <mailto:liujiangning1 at gmail.com>> wrote:
>>> Hi David,
>>>
>>> This commit introduced a regression for one of my benchmarks, and the failure is an assertion failure.
>>>
>>> The failure point is at
>>>
>>> LexicalScope *LexicalScopes::getOrCreateRegularScope(MDNode *Scope) {
>>> ......
>>> if (!Parent) {
>>> assert(DIDescriptor(Scope).isSubprogram());
>>> assert(DISubprogram(Scope).describes(MF->getFunction())); // Assertion failure here!
>>>
>>> That looks like something I debugged earlier today. This is http://llvm.org/PR22096 <http://llvm.org/PR22096> , which already has a reduction.
>>>
>>> For me, the problem went away when I reverted r225085 (I landed the revert in r225361), and they were unrelated to this change. Jinangning, does trunk work for you? Are you sure that your problem was caused by this change (r225000)?
>>>
>>>
>>> assert(!CurrentFnLexicalScope);
>>> CurrentFnLexicalScope = &I->second;
>>> }
>>>
>>> return &I->second;
>>> }
>>>
>>> And the call stack is like,
>>>
>>> 8 libLLVMCodeGen.so 0x00007fc17123eb31 llvm::LexicalScopes::getOrCreateRegularScope(llvm::MDNode*) + 305
>>> 9 libLLVMCodeGen.so 0x00007fc17123e986 llvm::LexicalScopes::getOrCreateInlinedScope(llvm::MDNode*, llvm::MDNode*) + 326
>>> 10 libLLVMCodeGen.so 0x00007fc17123e979 llvm::LexicalScopes::getOrCreateInlinedScope(llvm::MDNode*, llvm::MDNode*) + 313
>>> 11 libLLVMCodeGen.so 0x00007fc17123e95a llvm::LexicalScopes::getOrCreateInlinedScope(llvm::MDNode*, llvm::MDNode*) + 282
>>> 12 libLLVMCodeGen.so 0x00007fc17123e979 llvm::LexicalScopes::getOrCreateInlinedScope(llvm::MDNode*, llvm::MDNode*) + 313
>>> 13 libLLVMCodeGen.so 0x00007fc17123de78 llvm::LexicalScopes::extractLexicalScopes(llvm::SmallVectorImpl<std::pair<llvm::MachineInstr const*, llvm::MachineInstr const*> >&, llvm::DenseMap<llvm::MachineInstr const*, llvm::LexicalScope*, llvm::DenseMapInfo<llvm::MachineInstr const*>, llvm::detail::DenseMapPair<llvm::MachineInstr const*, llvm::LexicalScope*> >&) + 1064
>>> 14 libLLVMCodeGen.so 0x00007fc17123d9ee llvm::LexicalScopes::initialize(llvm::MachineFunction const&) + 78
>>> 15 libLLVMCodeGen.so 0x00007fc171240815 llvm::LiveDebugVariables::runOnMachineFunction(llvm::MachineFunction&) + 933
>>> 16 libLLVMCodeGen.so 0x00007fc1712a327c llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 124
>>> 17 libLLVMCore.so 0x00007fc17105ac7a llvm::FPPassManager::runOnFunction(llvm::Function&) + 362
>>> 18 libLLVMCore.so 0x00007fc17105af0b llvm::FPPassManager::runOnModule(llvm::Module&) + 43
>>> 19 libLLVMCore.so 0x00007fc17105b4a7 llvm::legacy::PassManagerImpl::run(llvm::Module&) + 999
>>> 20 libclangCodeGen.so 0x00007fc16fe12c4d clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::raw_ostream*) + 7741
>>> 21 libclangCodeGen.so 0x00007fc16ff60e85
>>> 22 libclangParse.so 0x00007fc16f847da3 clang::ParseAST(clang::Sema&, bool, bool) + 467
>>> 23 libclangCodeGen.so 0x00007fc16ff5fbbc clang::CodeGenAction::ExecuteAction() + 204
>>> 24 libclangFrontend.so 0x00007fc17047f21e clang::FrontendAction::Execute() + 62
>>> 25 libclangFrontend.so 0x00007fc17044e97c clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 892
>>> 26 libclangFrontendTool.so 0x00007fc1703d603a clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 3050
>>> 27 clang-3.6 0x000000000040cb71 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) + 577
>>> 28 clang-3.6 0x000000000040ba64 main + 12276
>>> 29 libc.so.6 0x00007fc16cf91de5 __libc_start_main + 245
>>> 30 clang-3.6 0x0000000000408961
>>>
>>> ....
>>> 1. <eof> parser at end of file
>>> 2. Code generation
>>> 3. Running pass 'Function Pass Manager' on module 'x.i.cc <http://x.i.cc/>'.
>>> 4. Running pass 'Debug Variable Analysis' on function '@__cxx_global_var_init9'
>>> clang-3.6: error: unable to execute command: Aborted (core dumped)
>>> clang-3.6: error: clang frontend command failed due to signal (use -v to see invocation)
>>>
>>> Since the test case is huge, I'm trying to narrow down to a small test case. But before I can work out that, I want to let you know first, in case you know something about that, and can get it fixed without a test case.
>>>
>>> Thanks,
>>> -Jiangning
>>>
>>>
>>> 2015-01-03 3:55 GMT+08:00 Jeroen Ketema <j.ketema at imperial.ac.uk <mailto:j.ketema at imperial.ac.uk>>:
>>>
>>>> On 02 Jan 2015, at 20:08, David Blaikie <dblaikie at gmail.com <mailto:dblaikie at gmail.com>> wrote:
>>>>
>>>>
>>>>
>>>> On Wed, Dec 31, 2014 at 2:52 AM, Jeroen Ketema <j.ketema at imperial.ac.uk <mailto:j.ketema at imperial.ac.uk>> wrote:
>>>> Hi David ,
>>>>
>>>> This commit is giving me some problems with the code below when compiled with
>>>>
>>>> clang -Wall -g -gcolumn-info -emit-llvm -c foo.c
>>>>
>>>> For the first loop the debug information attached to the srem instruction generated for “j % 16” refers to line 10, which is correct. However, for the second loop the debug information refers to line 17 and not to the expected line 18; only the call to __f on line 18 has line 18 attached to it, while the call to __i, the srem instruction, etc. have line 17 attached to it.
>>>>
>>>> void __i(int);
>>>> void __f(void);
>>>>
>>>> #define __fi(X) __f(),__i(X)
>>>>
>>>> void foo()
>>>> {
>>>> for(int j = 0;
>>>> __f(), __i(0 <= j),
>>>> __f(), __i((j % 16) == 0), // line 10
>>>> j < 1600;
>>>> j += 16)
>>>> {
>>>> }
>>>>
>>>> for(int j = 0;
>>>> __fi(0 <= j), // line 17
>>>> __fi((j % 16) == 0), // line 18
>>>> j < 1600;
>>>> j += 16)
>>>> {
>>>> }
>>>> }
>>>>
>>>>
>>>> Thanks for the report/example/etc. This should be fixed in r225083. Let me know if it isn't or you see any other line info quality issues going forward.
>>>
>>> Thanks. This indeed fixes things for me.
>>>
>>> ---
>>> Jeroen
>>>
>>>>
>>>> - David
>>>>
>>>> ---
>>>> Regards,
>>>>
>>>> Jeroen
>>>>
>>>> > On 30 Dec 2014, at 20:39, David Blaikie <dblaikie at gmail.com <http://gmail.com/>> wrote:
>>>> >
>>>> > Author: dblaikie
>>>> > Date: Tue Dec 30 13:39:33 2014
>>>> > New Revision: 225000
>>>> >
>>>> > URL: http://llvm.org/viewvc/llvm-project?rev=225000&view=rev <http://llvm.org/viewvc/llvm-project?rev=225000&view=rev>
>>>> > Log:
>>>> > Reapply "DebugInfo: Generalize debug info location handling"
>>>> >
>>>> > Originally committed in r224385 and reverted in r224441 due to concerns
>>>> > this change might've introduced a crash. Turns out this change fixes the
>>>> > crash introduced by one of my earlier more specific location handling
>>>> > changes (those specific fixes are reverted by this patch, in favor of
>>>> > the more general solution).
>>>> >
>>>> > Recommitted in r224941 and reverted in r224970 after it caused a crash
>>>> > when building compiler-rt. Looks to be due to this change zeroing out
>>>> > the debug location when emitting default arguments (which were meant to
>>>> > inherit their outer expression's location) thus creating call
>>>> > instructions without locations - these create problems for inlining and
>>>> > must not be created. That is fixed and tested in this version of the
>>>> > change.
>>>> >
>>>> > Original commit message:
>>>> >
>>>> > This is a more scalable (fixed in mostly one place, rather than many
>>>> > places that will need constant improvement/maintenance) solution to
>>>> > several commits I've made recently to increase source fidelity for
>>>> > subexpressions.
>>>> >
>>>> > This resetting had to be done at the DebugLoc level (not the
>>>> > SourceLocation level) to preserve scoping information (if the resetting
>>>> > was done with CGDebugInfo::EmitLocation, it would've caused the tail end
>>>> > of an expression's codegen to end up in a potentially different scope
>>>> > than the start, even though it was at the same source location). The
>>>> > drawback to this is that it might leave CGDebugInfo out of sync. Ideally
>>>> > CGDebugInfo shouldn't have a duplicate sense of the current
>>>> > SourceLocation, but for now it seems it does... - I don't think I'm
>>>> > going to tackle removing that just now.
>>>> >
>>>> > I expect this'll probably cause some more buildbot fallout & I'll
>>>> > investigate that as it comes up.
>>>> >
>>>> > Also these sort of improvements might be starting to show a weakness/bug
>>>> > in LLVM's line table handling: we don't correctly emit is_stmt for
>>>> > statements, we just put it on every line table entry. This means one
>>>> > statement split over multiple lines appears as multiple 'statements' and
>>>> > two statements on one line (without column info) are treated as one
>>>> > statement.
>>>> >
>>>> > I don't think we have any IR representation of statements that would
>>>> > help us distinguish these cases and identify the beginning of each
>>>> > statement - so that might be something we need to add (possibly to the
>>>> > lexical scope chain - a scope for each statement). This does cause some
>>>> > problems for GDB and possibly other DWARF consumers.
>>>> >
>>>> > Modified:
>>>> > cfe/trunk/lib/CodeGen/CGBlocks.cpp
>>>> > cfe/trunk/lib/CodeGen/CGClass.cpp
>>>> > cfe/trunk/lib/CodeGen/CGCleanup.cpp
>>>> > cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
>>>> > cfe/trunk/lib/CodeGen/CGDebugInfo.h
>>>> > cfe/trunk/lib/CodeGen/CGDecl.cpp
>>>> > cfe/trunk/lib/CodeGen/CGDeclCXX.cpp
>>>> > cfe/trunk/lib/CodeGen/CGException.cpp
>>>> > cfe/trunk/lib/CodeGen/CGExpr.cpp
>>>> > cfe/trunk/lib/CodeGen/CGExprCXX.cpp
>>>> > cfe/trunk/lib/CodeGen/CGExprComplex.cpp
>>>> > cfe/trunk/lib/CodeGen/CGExprScalar.cpp
>>>> > cfe/trunk/lib/CodeGen/CGStmt.cpp
>>>> > cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp
>>>> > cfe/trunk/lib/CodeGen/CodeGenFunction.h
>>>> > cfe/trunk/test/CodeGenCXX/PR20038.cpp
>>>> > cfe/trunk/test/CodeGenCXX/debug-info-line.cpp
>>>> > cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGBlocks.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBlocks.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBlocks.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGBlocks.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGBlocks.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -874,7 +874,7 @@ llvm::Value *CodeGenFunction::EmitBlockL
>>>> > // locations of subexpressions in the initialization.
>>>> > EmitExprAsInit(&l2r, &blockFieldPseudoVar,
>>>> > MakeAddrLValue(blockField, type, align),
>>>> > - /*captured by init*/ false, SourceLocation());
>>>> > + /*captured by init*/ false);
>>>> > }
>>>> >
>>>> > // Activate the cleanup if layout pushed one.
>>>> > @@ -1175,7 +1175,7 @@ CodeGenFunction::GenerateBlockFunction(G
>>>> > Alloca->setAlignment(Align);
>>>> > // Set the DebugLocation to empty, so the store is recognized as a
>>>> > // frame setup instruction by llvm::DwarfDebug::beginFunction().
>>>> > - NoLocation NL(*this, Builder);
>>>> > + ApplyDebugLocation NL(*this);
>>>> > Builder.CreateAlignedStore(BlockPointer, Alloca, Align);
>>>> > BlockPointerDbgLoc = Alloca;
>>>> > }
>>>> > @@ -1326,9 +1326,9 @@ CodeGenFunction::GenerateCopyHelperFunct
>>>> > false,
>>>> > false);
>>>> > // Create a scope with an artificial location for the body of this function.
>>>> > - ArtificialLocation AL(*this, Builder);
>>>> > + ApplyDebugLocation NL(*this);
>>>> > StartFunction(FD, C.VoidTy, Fn, FI, args);
>>>> > - AL.Emit();
>>>> > + ArtificialLocation AL(*this);
>>>> >
>>>> > llvm::Type *structPtrTy = blockInfo.StructureType->getPointerTo();
>>>> >
>>>> > @@ -1497,9 +1497,9 @@ CodeGenFunction::GenerateDestroyHelperFu
>>>> > nullptr, SC_Static,
>>>> > false, false);
>>>> > // Create a scope with an artificial location for the body of this function.
>>>> > - ArtificialLocation AL(*this, Builder);
>>>> > + ApplyDebugLocation NL(*this);
>>>> > StartFunction(FD, C.VoidTy, Fn, FI, args);
>>>> > - AL.Emit();
>>>> > + ArtificialLocation AL(*this);
>>>> >
>>>> > llvm::Type *structPtrTy = blockInfo.StructureType->getPointerTo();
>>>> >
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGClass.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGClass.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGClass.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGClass.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGClass.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -544,6 +544,7 @@ static void EmitMemberInitializer(CodeGe
>>>> > CXXCtorInitializer *MemberInit,
>>>> > const CXXConstructorDecl *Constructor,
>>>> > FunctionArgList &Args) {
>>>> > + ApplyDebugLocation Loc(CGF, MemberInit->getMemberLocation());
>>>> > assert(MemberInit->isAnyMemberInitializer() &&
>>>> > "Must have member initializer!");
>>>> > assert(MemberInit->getInit() && "Must have initializer!");
>>>> > @@ -597,26 +598,25 @@ static void EmitMemberInitializer(CodeGe
>>>> > ArrayRef<VarDecl *> ArrayIndexes;
>>>> > if (MemberInit->getNumArrayIndices())
>>>> > ArrayIndexes = MemberInit->getArrayIndexes();
>>>> > - CGF.EmitInitializerForField(Field, LHS, MemberInit->getInit(), ArrayIndexes,
>>>> > - MemberInit->getMemberLocation());
>>>> > + ApplyDebugLocation DL(CGF, MemberInit->getMemberLocation());
>>>> > + CGF.EmitInitializerForField(Field, LHS, MemberInit->getInit(), ArrayIndexes);
>>>> > }
>>>> >
>>>> > -void CodeGenFunction::EmitInitializerForField(FieldDecl *Field, LValue LHS,
>>>> > - Expr *Init,
>>>> > - ArrayRef<VarDecl *> ArrayIndexes,
>>>> > - SourceLocation DbgLoc) {
>>>> > +void CodeGenFunction::EmitInitializerForField(
>>>> > + FieldDecl *Field, LValue LHS, Expr *Init,
>>>> > + ArrayRef<VarDecl *> ArrayIndexes) {
>>>> > QualType FieldType = Field->getType();
>>>> > switch (getEvaluationKind(FieldType)) {
>>>> > case TEK_Scalar:
>>>> > if (LHS.isSimple()) {
>>>> > - EmitExprAsInit(Init, Field, LHS, false, DbgLoc);
>>>> > + EmitExprAsInit(Init, Field, LHS, false);
>>>> > } else {
>>>> > RValue RHS = RValue::get(EmitScalarExpr(Init));
>>>> > EmitStoreThroughLValue(RHS, LHS);
>>>> > }
>>>> > break;
>>>> > case TEK_Complex:
>>>> > - EmitComplexExprIntoLValue(Init, LHS, /*isInit*/ true, DbgLoc);
>>>> > + EmitComplexExprIntoLValue(Init, LHS, /*isInit*/ true);
>>>> > break;
>>>> > case TEK_Aggregate: {
>>>> > llvm::Value *ArrayIndexVar = nullptr;
>>>> > @@ -783,8 +783,6 @@ void CodeGenFunction::EmitConstructorBod
>>>> > // delegation optimization.
>>>> > if (CtorType == Ctor_Complete && IsConstructorDelegationValid(Ctor) &&
>>>> > CGM.getTarget().getCXXABI().hasConstructorVariants()) {
>>>> > - if (CGDebugInfo *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, Ctor->getLocEnd());
>>>> > EmitDelegateCXXConstructorCall(Ctor, Ctor_Base, Args, Ctor->getLocEnd());
>>>> > return;
>>>> > }
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGCleanup.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCleanup.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCleanup.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGCleanup.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGCleanup.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -861,10 +861,7 @@ void CodeGenFunction::PopCleanupBlock(bo
>>>> >
>>>> > // Emit the EH cleanup if required.
>>>> > if (RequiresEHCleanup) {
>>>> > - CGDebugInfo *DI = getDebugInfo();
>>>> > - SaveAndRestoreLocation AutoRestoreLocation(*this, Builder);
>>>> > - if (DI)
>>>> > - DI->EmitLocation(Builder, CurEHLocation);
>>>> > + ApplyDebugLocation AutoRestoreLocation(*this, CurEHLocation);
>>>> >
>>>> > CGBuilderTy::InsertPoint SavedIP = Builder.saveAndClearIP();
>>>> >
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -52,54 +52,38 @@ CGDebugInfo::~CGDebugInfo() {
>>>> > "Region stack mismatch, stack not empty!");
>>>> > }
>>>> >
>>>> > -SaveAndRestoreLocation::SaveAndRestoreLocation(CodeGenFunction &CGF,
>>>> > - CGBuilderTy &B)
>>>> > - : DI(CGF.getDebugInfo()), Builder(B) {
>>>> > - if (DI) {
>>>> > - SavedLoc = DI->getLocation();
>>>> > - DI->CurLoc = SourceLocation();
>>>> > - }
>>>> > -}
>>>> > -
>>>> > -SaveAndRestoreLocation::~SaveAndRestoreLocation() {
>>>> > - if (DI)
>>>> > - DI->EmitLocation(Builder, SavedLoc);
>>>> > -}
>>>> > -
>>>> > -NoLocation::NoLocation(CodeGenFunction &CGF, CGBuilderTy &B)
>>>> > - : SaveAndRestoreLocation(CGF, B) {
>>>> > - if (DI)
>>>> > - Builder.SetCurrentDebugLocation(llvm::DebugLoc());
>>>> > -}
>>>> > -
>>>> > -NoLocation::~NoLocation() {
>>>> > - if (DI)
>>>> > - assert(Builder.getCurrentDebugLocation().isUnknown());
>>>> > -}
>>>> > -
>>>> > -ArtificialLocation::ArtificialLocation(CodeGenFunction &CGF, CGBuilderTy &B)
>>>> > - : SaveAndRestoreLocation(CGF, B) {
>>>> > - if (DI)
>>>> > - Builder.SetCurrentDebugLocation(llvm::DebugLoc());
>>>> > -}
>>>> > -
>>>> > -void ArtificialLocation::Emit() {
>>>> > - if (DI) {
>>>> > - // Sync the Builder.
>>>> > - DI->EmitLocation(Builder, SavedLoc);
>>>> > - DI->CurLoc = SourceLocation();
>>>> > +ArtificialLocation::ArtificialLocation(CodeGenFunction &CGF)
>>>> > + : ApplyDebugLocation(CGF) {
>>>> > + if (auto *DI = CGF.getDebugInfo()) {
>>>> > // Construct a location that has a valid scope, but no line info.
>>>> > assert(!DI->LexicalBlockStack.empty());
>>>> > llvm::DIDescriptor Scope(DI->LexicalBlockStack.back());
>>>> > - Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(0, 0, Scope));
>>>> > + CGF.Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(0, 0, Scope));
>>>> > + }
>>>> > +}
>>>> > +
>>>> > +ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
>>>> > + SourceLocation TemporaryLocation,
>>>> > + bool ForceColumnInfo)
>>>> > + : CGF(CGF) {
>>>> > + if (auto *DI = CGF.getDebugInfo()) {
>>>> > + OriginalLocation = CGF.Builder.getCurrentDebugLocation();
>>>> > + if (TemporaryLocation.isInvalid())
>>>> > + CGF.Builder.SetCurrentDebugLocation(llvm::DebugLoc());
>>>> > + else
>>>> > + DI->EmitLocation(CGF.Builder, TemporaryLocation, ForceColumnInfo);
>>>> > }
>>>> > }
>>>> >
>>>> > -ArtificialLocation::~ArtificialLocation() {
>>>> > - if (DI)
>>>> > - assert(Builder.getCurrentDebugLocation().getLine() == 0);
>>>> > +ApplyDebugLocation::~ApplyDebugLocation() {
>>>> > + // Query CGF so the location isn't overwritten when location updates are
>>>> > + // temporarily disabled (for C++ default function arguments)
>>>> > + if (CGF.getDebugInfo())
>>>> > + CGF.Builder.SetCurrentDebugLocation(OriginalLocation);
>>>> > }
>>>> >
>>>> > +/// ArtificialLocation - An RAII object that temporarily switches to
>>>> > +/// an artificial debug location that has a valid scope, but no line
>>>> > void CGDebugInfo::setLocation(SourceLocation Loc) {
>>>> > // If the new location isn't valid return.
>>>> > if (Loc.isInvalid())
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.h
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGDebugInfo.h (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGDebugInfo.h Tue Dec 30 13:39:33 2014
>>>> > @@ -448,27 +448,16 @@ private:
>>>> > }
>>>> > };
>>>> >
>>>> > -/// SaveAndRestoreLocation - An RAII object saves the current location
>>>> > -/// and automatically restores it to the original value.
>>>> > -class SaveAndRestoreLocation {
>>>> > +class ApplyDebugLocation {
>>>> > protected:
>>>> > - SourceLocation SavedLoc;
>>>> > - CGDebugInfo *DI;
>>>> > - CGBuilderTy &Builder;
>>>> > -public:
>>>> > - SaveAndRestoreLocation(CodeGenFunction &CGF, CGBuilderTy &B);
>>>> > - /// Autorestore everything back to normal.
>>>> > - ~SaveAndRestoreLocation();
>>>> > -};
>>>> > + llvm::DebugLoc OriginalLocation;
>>>> > + CodeGenFunction &CGF;
>>>> >
>>>> > -/// NoLocation - An RAII object that temporarily disables debug
>>>> > -/// locations. This is useful for emitting instructions that should be
>>>> > -/// counted towards the function prologue.
>>>> > -class NoLocation : public SaveAndRestoreLocation {
>>>> > public:
>>>> > - NoLocation(CodeGenFunction &CGF, CGBuilderTy &B);
>>>> > - /// Autorestore everything back to normal.
>>>> > - ~NoLocation();
>>>> > + ApplyDebugLocation(CodeGenFunction &CGF,
>>>> > + SourceLocation TemporaryLocation = SourceLocation(),
>>>> > + bool ForceColumnInfo = false);
>>>> > + ~ApplyDebugLocation();
>>>> > };
>>>> >
>>>> > /// ArtificialLocation - An RAII object that temporarily switches to
>>>> > @@ -482,16 +471,9 @@ public:
>>>> > /// This is necessary because passing an empty SourceLocation to
>>>> > /// CGDebugInfo::setLocation() will result in the last valid location
>>>> > /// being reused.
>>>> > -class ArtificialLocation : public SaveAndRestoreLocation {
>>>> > +class ArtificialLocation : public ApplyDebugLocation {
>>>> > public:
>>>> > - ArtificialLocation(CodeGenFunction &CGF, CGBuilderTy &B);
>>>> > -
>>>> > - /// Set the current location to line 0, but within the current scope
>>>> > - /// (= the top of the LexicalBlockStack).
>>>> > - void Emit();
>>>> > -
>>>> > - /// Autorestore everything back to normal.
>>>> > - ~ArtificialLocation();
>>>> > + ArtificialLocation(CodeGenFunction &CGF);
>>>> > };
>>>> >
>>>> >
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGDecl.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -597,14 +597,13 @@ static void drillIntoBlockVariable(CodeG
>>>> > }
>>>> >
>>>> > void CodeGenFunction::EmitScalarInit(const Expr *init, const ValueDecl *D,
>>>> > - LValue lvalue, bool capturedByInit,
>>>> > - SourceLocation DbgLoc) {
>>>> > + LValue lvalue, bool capturedByInit) {
>>>> > Qualifiers::ObjCLifetime lifetime = lvalue.getObjCLifetime();
>>>> > if (!lifetime) {
>>>> > llvm::Value *value = EmitScalarExpr(init);
>>>> > if (capturedByInit)
>>>> > drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
>>>> > - EmitStoreThroughLValue(RValue::get(value), lvalue, true, DbgLoc);
>>>> > + EmitStoreThroughLValue(RValue::get(value), lvalue, true);
>>>> > return;
>>>> > }
>>>> >
>>>> > @@ -1088,6 +1087,7 @@ void CodeGenFunction::EmitAutoVarInit(co
>>>> > if (emission.wasEmittedAsGlobal()) return;
>>>> >
>>>> > const VarDecl &D = *emission.Variable;
>>>> > + ApplyDebugLocation DL(*this, D.getLocation());
>>>> > QualType type = D.getType();
>>>> >
>>>> > // If this local has an initializer, emit it now.
>>>> > @@ -1126,7 +1126,7 @@ void CodeGenFunction::EmitAutoVarInit(co
>>>> > if (!constant) {
>>>> > LValue lv = MakeAddrLValue(Loc, type, alignment);
>>>> > lv.setNonGC(true);
>>>> > - return EmitExprAsInit(Init, &D, lv, capturedByInit, D.getLocation());
>>>> > + return EmitExprAsInit(Init, &D, lv, capturedByInit);
>>>> > }
>>>> >
>>>> > if (!emission.IsConstantAggregate) {
>>>> > @@ -1192,26 +1192,25 @@ void CodeGenFunction::EmitAutoVarInit(co
>>>> > /// \param capturedByInit true if the variable is a __block variable
>>>> > /// whose address is potentially changed by the initializer
>>>> > void CodeGenFunction::EmitExprAsInit(const Expr *init, const ValueDecl *D,
>>>> > - LValue lvalue, bool capturedByInit,
>>>> > - SourceLocation DbgLoc) {
>>>> > + LValue lvalue, bool capturedByInit) {
>>>> > QualType type = D->getType();
>>>> >
>>>> > if (type->isReferenceType()) {
>>>> > RValue rvalue = EmitReferenceBindingToExpr(init);
>>>> > if (capturedByInit)
>>>> > drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
>>>> > - EmitStoreThroughLValue(rvalue, lvalue, true, DbgLoc);
>>>> > + EmitStoreThroughLValue(rvalue, lvalue, true);
>>>> > return;
>>>> > }
>>>> > switch (getEvaluationKind(type)) {
>>>> > case TEK_Scalar:
>>>> > - EmitScalarInit(init, D, lvalue, capturedByInit, DbgLoc);
>>>> > + EmitScalarInit(init, D, lvalue, capturedByInit);
>>>> > return;
>>>> > case TEK_Complex: {
>>>> > ComplexPairTy complex = EmitComplexExpr(init);
>>>> > if (capturedByInit)
>>>> > drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
>>>> > - EmitStoreOfComplex(complex, lvalue, /*init*/ true, DbgLoc);
>>>> > + EmitStoreOfComplex(complex, lvalue, /*init*/ true);
>>>> > return;
>>>> > }
>>>> > case TEK_Aggregate:
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGDeclCXX.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDeclCXX.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDeclCXX.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGDeclCXX.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGDeclCXX.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -474,11 +474,11 @@ CodeGenFunction::GenerateCXXGlobalInitFu
>>>> > ArrayRef<llvm::Function *> Decls,
>>>> > llvm::GlobalVariable *Guard) {
>>>> > {
>>>> > - ArtificialLocation AL(*this, Builder);
>>>> > + ApplyDebugLocation NL(*this);
>>>> > StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
>>>> > getTypes().arrangeNullaryFunction(), FunctionArgList());
>>>> > // Emit an artificial location for this function.
>>>> > - AL.Emit();
>>>> > + ArtificialLocation AL(*this);
>>>> >
>>>> > llvm::BasicBlock *ExitBlock = nullptr;
>>>> > if (Guard) {
>>>> > @@ -525,11 +525,11 @@ void CodeGenFunction::GenerateCXXGlobalD
>>>> > const std::vector<std::pair<llvm::WeakVH, llvm::Constant*> >
>>>> > &DtorsAndObjects) {
>>>> > {
>>>> > - ArtificialLocation AL(*this, Builder);
>>>> > + ApplyDebugLocation NL(*this);
>>>> > StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
>>>> > getTypes().arrangeNullaryFunction(), FunctionArgList());
>>>> > // Emit an artificial location for this function.
>>>> > - AL.Emit();
>>>> > + ArtificialLocation AL(*this);
>>>> >
>>>> > // Emit the dtors, in reverse order from construction.
>>>> > for (unsigned i = 0, e = DtorsAndObjects.size(); i != e; ++i) {
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGException.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGException.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGException.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGException.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGException.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -734,9 +734,7 @@ llvm::BasicBlock *CodeGenFunction::EmitL
>>>> >
>>>> > // Save the current IR generation state.
>>>> > CGBuilderTy::InsertPoint savedIP = Builder.saveAndClearIP();
>>>> > - SaveAndRestoreLocation AutoRestoreLocation(*this, Builder);
>>>> > - if (CGDebugInfo *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, CurEHLocation);
>>>> > + ApplyDebugLocation AutoRestoreLocation(*this, CurEHLocation);
>>>> >
>>>> > const EHPersonality &personality = EHPersonality::get(CGM);
>>>> >
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGExpr.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExpr.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExpr.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGExpr.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGExpr.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -1438,11 +1438,7 @@ RValue CodeGenFunction::EmitLoadOfGlobal
>>>> > /// lvalue, where both are guaranteed to the have the same type, and that type
>>>> > /// is 'Ty'.
>>>> > void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst,
>>>> > - bool isInit,
>>>> > - SourceLocation DbgLoc) {
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, DbgLoc);
>>>> > -
>>>> > + bool isInit) {
>>>> > if (!Dst.isSimple()) {
>>>> > if (Dst.isVectorElt()) {
>>>> > // Read/modify/write the vector, inserting the new element.
>>>> > @@ -2408,9 +2404,6 @@ LValue CodeGenFunction::EmitArraySubscri
>>>> > // The element count here is the total number of non-VLA elements.
>>>> > llvm::Value *numElements = getVLASize(vla).first;
>>>> >
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, E->getLocStart());
>>>> > -
>>>> > // Effectively, the multiply by the VLA size is part of the GEP.
>>>> > // GEP indexes are signed, and scaling an index isn't permitted to
>>>> > // signed-overflow, so we use the same semantics for our explicit
>>>> > @@ -2456,9 +2449,6 @@ LValue CodeGenFunction::EmitArraySubscri
>>>> > // Propagate the alignment from the array itself to the result.
>>>> > ArrayAlignment = ArrayLV.getAlignment();
>>>> >
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, E->getLocStart());
>>>> > -
>>>> > if (getLangOpts().isSignedOverflowDefined())
>>>> > Address = Builder.CreateGEP(ArrayPtr, Args, "arrayidx");
>>>> > else
>>>> > @@ -2466,8 +2456,6 @@ LValue CodeGenFunction::EmitArraySubscri
>>>> > } else {
>>>> > // The base must be a pointer, which is not an aggregate. Emit it.
>>>> > llvm::Value *Base = EmitScalarExpr(E->getBase());
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, E->getLocStart());
>>>> > if (getLangOpts().isSignedOverflowDefined())
>>>> > Address = Builder.CreateGEP(Base, Idx, "arrayidx");
>>>> > else
>>>> > @@ -3024,18 +3012,15 @@ RValue CodeGenFunction::EmitRValueForFie
>>>> >
>>>> > RValue CodeGenFunction::EmitCallExpr(const CallExpr *E,
>>>> > ReturnValueSlot ReturnValue) {
>>>> > - if (CGDebugInfo *DI = getDebugInfo()) {
>>>> > - SourceLocation Loc = E->getLocStart();
>>>> > - // Force column info to be generated so we can differentiate
>>>> > - // multiple call sites on the same line in the debug info.
>>>> > - // FIXME: This is insufficient. Two calls coming from the same macro
>>>> > - // expansion will still get the same line/column and break debug info. It's
>>>> > - // possible that LLVM can be fixed to not rely on this uniqueness, at which
>>>> > - // point this workaround can be removed.
>>>> > - const FunctionDecl* Callee = E->getDirectCallee();
>>>> > - bool ForceColumnInfo = Callee && Callee->isInlineSpecified();
>>>> > - DI->EmitLocation(Builder, Loc, ForceColumnInfo);
>>>> > - }
>>>> > + // Force column info to be generated so we can differentiate
>>>> > + // multiple call sites on the same line in the debug info.
>>>> > + // FIXME: This is insufficient. Two calls coming from the same macro
>>>> > + // expansion will still get the same line/column and break debug info. It's
>>>> > + // possible that LLVM can be fixed to not rely on this uniqueness, at which
>>>> > + // point this workaround can be removed.
>>>> > + ApplyDebugLocation DL(*this, E->getLocStart(),
>>>> > + E->getDirectCallee() &&
>>>> > + E->getDirectCallee()->isInlineSpecified());
>>>> >
>>>> > // Builtins never have block type.
>>>> > if (E->getCallee()->getType()->isBlockPointerType())
>>>> > @@ -3151,8 +3136,6 @@ LValue CodeGenFunction::EmitBinaryOperat
>>>> >
>>>> > RValue RV = EmitAnyExpr(E->getRHS());
>>>> > LValue LV = EmitCheckedLValue(E->getLHS(), TCK_Store);
>>>> > - if (CGDebugInfo *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, E->getLocStart());
>>>> > EmitStoreThroughLValue(RV, LV);
>>>> > return LV;
>>>> > }
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGExprCXX.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprCXX.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprCXX.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGExprCXX.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGExprCXX.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -187,8 +187,6 @@ RValue CodeGenFunction::EmitCXXMemberOrO
>>>> > unsigned ArgsToSkip = isa<CXXOperatorCallExpr>(CE) ? 1 : 0;
>>>> > llvm::Value *RHS =
>>>> > EmitLValue(*(CE->arg_begin() + ArgsToSkip)).getAddress();
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, CE->getLocStart());
>>>> > EmitAggregateAssign(This, RHS, CE->getType());
>>>> > return RValue::get(This);
>>>> > }
>>>> > @@ -754,15 +752,13 @@ static llvm::Value *EmitCXXNewAllocSize(
>>>> > }
>>>> >
>>>> > static void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const Expr *Init,
>>>> > - QualType AllocType, llvm::Value *NewPtr,
>>>> > - SourceLocation DbgLoc = SourceLocation()) {
>>>> > + QualType AllocType, llvm::Value *NewPtr) {
>>>> > // FIXME: Refactor with EmitExprAsInit.
>>>> > CharUnits Alignment = CGF.getContext().getTypeAlignInChars(AllocType);
>>>> > switch (CGF.getEvaluationKind(AllocType)) {
>>>> > case TEK_Scalar:
>>>> > CGF.EmitScalarInit(Init, nullptr,
>>>> > - CGF.MakeAddrLValue(NewPtr, AllocType, Alignment), false,
>>>> > - DbgLoc);
>>>> > + CGF.MakeAddrLValue(NewPtr, AllocType, Alignment), false);
>>>> > return;
>>>> > case TEK_Complex:
>>>> > CGF.EmitComplexExprIntoLValue(Init, CGF.MakeAddrLValue(NewPtr, AllocType,
>>>> > @@ -1020,12 +1016,12 @@ static void EmitNewInitializer(CodeGenFu
>>>> > llvm::Value *NewPtr,
>>>> > llvm::Value *NumElements,
>>>> > llvm::Value *AllocSizeWithoutCookie) {
>>>> > + ApplyDebugLocation DL(CGF, E->getStartLoc());
>>>> > if (E->isArray())
>>>> > CGF.EmitNewArrayInitializer(E, ElementType, NewPtr, NumElements,
>>>> > AllocSizeWithoutCookie);
>>>> > else if (const Expr *Init = E->getInitializer())
>>>> > - StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr,
>>>> > - E->getStartLoc());
>>>> > + StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr);
>>>> > }
>>>> >
>>>> > /// Emit a call to an operator new or operator delete function, as implicitly
>>>> > @@ -1269,9 +1265,6 @@ llvm::Value *CodeGenFunction::EmitCXXNew
>>>> > E->placement_arg_end(), /* CalleeDecl */ nullptr,
>>>> > /*ParamsToSkip*/ 1);
>>>> >
>>>> > - if (auto *DI = getDebugInfo())
>>>> > - DI->EmitLocation(Builder, E->getLocStart());
>>>> > -
>>>> > // Emit the allocation call. If the allocator is a global placement
>>>> > // operator, just "inline" it directly.
>>>> > RValue RV;
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGExprComplex.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprComplex.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprComplex.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGExprComplex.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGExprComplex.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -81,8 +81,7 @@ public:
>>>> >
>>>> > /// EmitStoreOfComplex - Store the specified real/imag parts into the
>>>> > /// specified value pointer.
>>>> > - void EmitStoreOfComplex(ComplexPairTy Val, LValue LV, bool isInit,
>>>> > - SourceLocation DbgLoc);
>>>> > + void EmitStoreOfComplex(ComplexPairTy Val, LValue LV, bool isInit);
>>>> >
>>>> > /// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType.
>>>> > ComplexPairTy EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType,
>>>> > @@ -335,11 +334,7 @@ ComplexPairTy ComplexExprEmitter::EmitLo
>>>> > /// EmitStoreOfComplex - Store the specified real/imag parts into the
>>>> > /// specified value pointer.
>>>> > void ComplexExprEmitter::EmitStoreOfComplex(ComplexPairTy Val, LValue lvalue,
>>>> > - bool isInit,
>>>> > - SourceLocation DbgLoc) {
>>>> > - if (auto *DI = CGF.getDebugInfo())
>>>> > - DI->EmitLocation(CGF.Builder, DbgLoc);
>>>> > -
>>>> > + bool isInit) {
>>>> > if (lvalue.getType()->isAtomicType())
>>>> > return CGF.EmitAtomicStore(RValue::getComplex(Val), lvalue, isInit);
>>>> >
>>>> > @@ -869,7 +864,7 @@ EmitCompoundAssignLValue(const CompoundA
>>>> > // Truncate the result and store it into the LHS lvalue.
>>>> > if (LHSTy->isAnyComplexType()) {
>>>> > ComplexPairTy ResVal = EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy);
>>>> > - EmitStoreOfComplex(ResVal, LHS, /*isInit*/ false, E->getLocStart());
>>>> > + EmitStoreOfComplex(ResVal, LHS, /*isInit*/ false);
>>>> > Val = RValue::getComplex(ResVal);
>>>> > } else {
>>>> > llvm::Value *ResVal =
>>>> > @@ -914,7 +909,7 @@ LValue ComplexExprEmitter::EmitBinAssign
>>>> > LValue LHS = CGF.EmitLValue(E->getLHS());
>>>> >
>>>> > // Store the result value into the LHS lvalue.
>>>> > - EmitStoreOfComplex(Val, LHS, /*isInit*/ false, E->getLocStart());
>>>> > + EmitStoreOfComplex(Val, LHS, /*isInit*/ false);
>>>> >
>>>> > return LHS;
>>>> > }
>>>> > @@ -1042,19 +1037,18 @@ ComplexPairTy CodeGenFunction::EmitCompl
>>>> > }
>>>> >
>>>> > void CodeGenFunction::EmitComplexExprIntoLValue(const Expr *E, LValue dest,
>>>> > - bool isInit,
>>>> > - SourceLocation DbgLoc) {
>>>> > + bool isInit) {
>>>> > assert(E && getComplexType(E->getType()) &&
>>>> > "Invalid complex expression to emit");
>>>> > ComplexExprEmitter Emitter(*this);
>>>> > ComplexPairTy Val = Emitter.Visit(const_cast<Expr*>(E));
>>>> > - Emitter.EmitStoreOfComplex(Val, dest, isInit, DbgLoc);
>>>> > + Emitter.EmitStoreOfComplex(Val, dest, isInit);
>>>> > }
>>>> >
>>>> > /// EmitStoreOfComplex - Store a complex number into the specified l-value.
>>>> > void CodeGenFunction::EmitStoreOfComplex(ComplexPairTy V, LValue dest,
>>>> > - bool isInit, SourceLocation DbgLoc) {
>>>> > - ComplexExprEmitter(*this).EmitStoreOfComplex(V, dest, isInit, DbgLoc);
>>>> > + bool isInit) {
>>>> > + ComplexExprEmitter(*this).EmitStoreOfComplex(V, dest, isInit);
>>>> > }
>>>> >
>>>> > /// EmitLoadOfComplex - Load a complex number from the specified address.
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGExprScalar.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprScalar.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprScalar.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGExprScalar.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGExprScalar.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -196,6 +196,7 @@ public:
>>>> > //===--------------------------------------------------------------------===//
>>>> >
>>>> > Value *Visit(Expr *E) {
>>>> > + ApplyDebugLocation DL(CGF, E->getLocStart());
>>>> > return StmtVisitor<ScalarExprEmitter, Value*>::Visit(E);
>>>> > }
>>>> >
>>>> > @@ -3042,7 +3043,7 @@ Value *ScalarExprEmitter::VisitBinLAnd(c
>>>> > // Emit an unconditional branch from this block to ContBlock.
>>>> > {
>>>> > // There is no need to emit line number for unconditional branch.
>>>> > - SuppressDebugLocation S(Builder);
>>>> > + ApplyDebugLocation DL(CGF);
>>>> > CGF.EmitBlock(ContBlock);
>>>> > }
>>>> > // Insert an entry into the phi node for the edge with the value of RHSCond.
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGStmt.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmt.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmt.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGStmt.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGStmt.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -565,7 +565,7 @@ void CodeGenFunction::EmitIfStmt(const I
>>>> > if (const Stmt *Else = S.getElse()) {
>>>> > {
>>>> > // There is no need to emit line number for unconditional branch.
>>>> > - SuppressDebugLocation S(Builder);
>>>> > + ApplyDebugLocation DL(*this);
>>>> > EmitBlock(ElseBlock);
>>>> > }
>>>> > {
>>>> > @@ -574,7 +574,7 @@ void CodeGenFunction::EmitIfStmt(const I
>>>> > }
>>>> > {
>>>> > // There is no need to emit line number for unconditional branch.
>>>> > - SuppressDebugLocation S(Builder);
>>>> > + ApplyDebugLocation DL(*this);
>>>> > EmitBranch(ContBlock);
>>>> > }
>>>> > }
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CGStmtOpenMP.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -86,13 +86,13 @@ static void EmitOMPIfClause(CodeGenFunct
>>>> > // Emit the 'else' code if present.
>>>> > {
>>>> > // There is no need to emit line number for unconditional branch.
>>>> > - SuppressDebugLocation SDL(CGF.Builder);
>>>> > + ApplyDebugLocation DL(CGF);
>>>> > CGF.EmitBlock(ElseBlock);
>>>> > }
>>>> > CodeGen(/*ThenBlock*/ false);
>>>> > {
>>>> > // There is no need to emit line number for unconditional branch.
>>>> > - SuppressDebugLocation SDL(CGF.Builder);
>>>> > + ApplyDebugLocation DL(CGF);
>>>> > CGF.EmitBranch(ContBlock);
>>>> > }
>>>> > // Emit the continuation block for code after the if.
>>>> >
>>>> > Modified: cfe/trunk/lib/CodeGen/CodeGenFunction.h
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.h?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.h?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/lib/CodeGen/CodeGenFunction.h (original)
>>>> > +++ cfe/trunk/lib/CodeGen/CodeGenFunction.h Tue Dec 30 13:39:33 2014
>>>> > @@ -93,19 +93,6 @@ enum TypeEvaluationKind {
>>>> > TEK_Aggregate
>>>> > };
>>>> >
>>>> > -class SuppressDebugLocation {
>>>> > - llvm::DebugLoc CurLoc;
>>>> > - llvm::IRBuilderBase &Builder;
>>>> > -public:
>>>> > - SuppressDebugLocation(llvm::IRBuilderBase &Builder)
>>>> > - : CurLoc(Builder.getCurrentDebugLocation()), Builder(Builder) {
>>>> > - Builder.SetCurrentDebugLocation(llvm::DebugLoc());
>>>> > - }
>>>> > - ~SuppressDebugLocation() {
>>>> > - Builder.SetCurrentDebugLocation(CurLoc);
>>>> > - }
>>>> > -};
>>>> > -
>>>> > /// CodeGenFunction - This class organizes the per-function state that is used
>>>> > /// while generating LLVM code.
>>>> > class CodeGenFunction : public CodeGenTypeCache {
>>>> > @@ -1300,8 +1287,7 @@ public:
>>>> > FunctionArgList &Args);
>>>> >
>>>> > void EmitInitializerForField(FieldDecl *Field, LValue LHS, Expr *Init,
>>>> > - ArrayRef<VarDecl *> ArrayIndexes,
>>>> > - SourceLocation DbgLoc = SourceLocation());
>>>> > + ArrayRef<VarDecl *> ArrayIndexes);
>>>> >
>>>> > /// InitializeVTablePointer - Initialize the vtable pointer of the given
>>>> > /// subobject.
>>>> > @@ -1546,7 +1532,7 @@ public:
>>>> > /// EmitExprAsInit - Emits the code necessary to initialize a
>>>> > /// location in memory with the given initializer.
>>>> > void EmitExprAsInit(const Expr *init, const ValueDecl *D, LValue lvalue,
>>>> > - bool capturedByInit, SourceLocation DbgLoc);
>>>> > + bool capturedByInit);
>>>> >
>>>> > /// hasVolatileMember - returns true if aggregate type has a volatile
>>>> > /// member.
>>>> > @@ -1833,8 +1819,7 @@ public:
>>>> > void EmitVarDecl(const VarDecl &D);
>>>> >
>>>> > void EmitScalarInit(const Expr *init, const ValueDecl *D, LValue lvalue,
>>>> > - bool capturedByInit,
>>>> > - SourceLocation DbgLoc = SourceLocation());
>>>> > + bool capturedByInit);
>>>> > void EmitScalarInit(llvm::Value *init, LValue lvalue);
>>>> >
>>>> > typedef void SpecialInitFn(CodeGenFunction &Init, const VarDecl &D,
>>>> > @@ -2164,8 +2149,7 @@ public:
>>>> > /// EmitStoreThroughLValue - Store the specified rvalue into the specified
>>>> > /// lvalue, where both are guaranteed to the have the same type, and that type
>>>> > /// is 'Ty'.
>>>> > - void EmitStoreThroughLValue(RValue Src, LValue Dst, bool isInit = false,
>>>> > - SourceLocation DbgLoc = SourceLocation());
>>>> > + void EmitStoreThroughLValue(RValue Src, LValue Dst, bool isInit = false);
>>>> > void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst);
>>>> > void EmitStoreThroughGlobalRegLValue(RValue Src, LValue Dst);
>>>> >
>>>> > @@ -2537,12 +2521,10 @@ public:
>>>> >
>>>> > /// EmitComplexExprIntoLValue - Emit the given expression of complex
>>>> > /// type and place its result into the specified l-value.
>>>> > - void EmitComplexExprIntoLValue(const Expr *E, LValue dest, bool isInit,
>>>> > - SourceLocation DbgLoc = SourceLocation());
>>>> > + void EmitComplexExprIntoLValue(const Expr *E, LValue dest, bool isInit);
>>>> >
>>>> > /// EmitStoreOfComplex - Store a complex number into the specified l-value.
>>>> > - void EmitStoreOfComplex(ComplexPairTy V, LValue dest, bool isInit,
>>>> > - SourceLocation DbgLoc = SourceLocation());
>>>> > + void EmitStoreOfComplex(ComplexPairTy V, LValue dest, bool isInit);
>>>> >
>>>> > /// EmitLoadOfComplex - Load a complex number from the specified l-value.
>>>> > ComplexPairTy EmitLoadOfComplex(LValue src, SourceLocation loc);
>>>> >
>>>> > Modified: cfe/trunk/test/CodeGenCXX/PR20038.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/PR20038.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/PR20038.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/test/CodeGenCXX/PR20038.cpp (original)
>>>> > +++ cfe/trunk/test/CodeGenCXX/PR20038.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -1,4 +1,4 @@
>>>> > -// RUN: %clang_cc1 -triple %itanium_abi_triple -g -emit-llvm %s -o - | FileCheck %s
>>>> > +// RUN: %clang_cc1 -triple %itanium_abi_triple -g -mllvm -no-discriminators -emit-llvm %s -o - | FileCheck %s
>>>> >
>>>> > struct C {
>>>> > ~C();
>>>> > @@ -8,9 +8,7 @@ extern bool b;
>>>> > // CHECK: call {{.*}}, !dbg [[DTOR_CALL2_LOC:![0-9]*]]
>>>> > // CHECK: [[FUN1:.*]] = {{.*}}; [ DW_TAG_subprogram ] {{.*}} [def] [fun1]
>>>> > // CHECK: [[FUN2:.*]] = {{.*}}; [ DW_TAG_subprogram ] {{.*}} [def] [fun2]
>>>> > -// CHECK: [[DTOR_CALL1_LOC]] = !{i32 [[@LINE+2]], i32 0, [[FUN1_BLOCK:.*]], null}
>>>> > -// CHECK: [[FUN1_BLOCK]] = !{!"0xb{{[^,]*}}", {{[^,]*}}, [[FUN1]]}
>>>> > +// CHECK: [[DTOR_CALL1_LOC]] = !{i32 [[@LINE+1]], i32 0, [[FUN1]], null}
>>>> > void fun1() { b && (C(), 1); }
>>>> > -// CHECK: [[DTOR_CALL2_LOC]] = !{i32 [[@LINE+2]], i32 0, [[FUN2_BLOCK1:.*]], null}
>>>> > -// CHECK: [[FUN2_BLOCK1]] = !{!"0xb{{[^,]*}}", {{[^,]*}}, [[FUN2]]}
>>>> > +// CHECK: [[DTOR_CALL2_LOC]] = !{i32 [[@LINE+1]], i32 0, [[FUN2]], null}
>>>> > bool fun2() { return (C(), b) && 0; }
>>>> >
>>>> > Modified: cfe/trunk/test/CodeGenCXX/debug-info-line.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-line.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-line.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/test/CodeGenCXX/debug-info-line.cpp (original)
>>>> > +++ cfe/trunk/test/CodeGenCXX/debug-info-line.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -1,4 +1,5 @@
>>>> > // RUN: %clang_cc1 -g -std=c++11 -S -emit-llvm %s -o - | FileCheck %s
>>>> > +// RUN: %clang_cc1 -triple i686-linux-gnu -g -std=c++11 -S -emit-llvm %s -o - | FileCheck %s
>>>> >
>>>> > int &src();
>>>> > int *sink();
>>>> > @@ -110,6 +111,23 @@ void f10() {
>>>> > new (void_src()) int(src()));
>>>> > }
>>>> >
>>>> > +// CHECK-LABEL: define
>>>> > +__complex double f11() {
>>>> > + __complex double f;
>>>> > +// CHECK: store {{.*}} !dbg [[DBG_F11:!.*]]
>>>> > +#line 1200
>>>> > + return f;
>>>> > +}
>>>> > +
>>>> > +// CHECK-LABEL: define
>>>> > +void f12() {
>>>> > + int f12_1();
>>>> > + void f12_2(int = f12_1());
>>>> > +// CHECK: call i32 {{.*}} !dbg [[DBG_F12:!.*]]
>>>> > +#line 1300
>>>> > + f12_2();
>>>> > +}
>>>> > +
>>>> > // CHECK: [[DBG_F1]] = !{i32 100,
>>>> > // CHECK: [[DBG_FOO_VALUE]] = !{i32 200,
>>>> > // CHECK: [[DBG_FOO_REF]] = !{i32 202,
>>>> > @@ -124,3 +142,5 @@ void f10() {
>>>> > // CHECK: [[DBG_F9]] = !{i32 1000,
>>>> > // CHECK: [[DBG_F10_ICMP]] = !{i32 1100,
>>>> > // CHECK: [[DBG_F10_STORE]] = !{i32 1100,
>>>> > +// CHECK: [[DBG_F11]] = !{i32 1200,
>>>> > +// CHECK: [[DBG_F12]] = !{i32 1300,
>>>> >
>>>> > Modified: cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp
>>>> > URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp?rev=225000&r1=224999&r2=225000&view=diff <http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp?rev=225000&r1=224999&r2=225000&view=diff>
>>>> > ==============================================================================
>>>> > --- cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp (original)
>>>> > +++ cfe/trunk/test/CodeGenCXX/debug-info-scope.cpp Tue Dec 30 13:39:33 2014
>>>> > @@ -36,12 +36,12 @@ void func() {
>>>> > // CHECK: = !{!"0x100\00{{.*}}", [[FOR:![0-9]*]], {{.*}} ; [ DW_TAG_auto_variable ] [i] [line [[@LINE+2]]]
>>>> > // CHECK: [[FOR]] = !{!"0xb\00[[@LINE+1]]\00{{.*}}", !{{.*}}} ; [ DW_TAG_lexical_block ]
>>>> > for (int i = 0; i != 10; ++i) {
>>>> > - // FIXME: Do not include scopes that have only other scopes (and no variables
>>>> > - // or using declarations) as direct children, they just waste
>>>> > - // space/relocations/etc.
>>>> > - // CHECK: = !{!"0x100\00{{.*}}", [[FOR_COMPOUND:![0-9]*]], {{.*}} ; [ DW_TAG_auto_variable ] [b] [line [[@LINE+3]]]
>>>> > - // CHECK: [[FOR_COMPOUND]] = !{!"0xb\00[[@LINE-5]]\00{{.*}}", !{{[0-9]+}}, [[FOR_BODY:![0-9]+]]} ; [ DW_TAG_lexical_block ]
>>>> > - // CHECK: [[FOR_BODY]] = !{!"0xb\00[[@LINE-6]]\00{{.*}}", !{{[0-9]+}}, [[FOR]]} ; [ DW_TAG_lexical_block ]
>>>> > + // FIXME: Do not include scopes that have only other scopes (and no variables
>>>> > + // or using declarations) as direct children, they just waste
>>>> > + // space/relocations/etc.
>>>> > + // CHECK: [[FOR_LOOP_INCLUDING_COND:!.*]] = !{!"0xb\00[[@LINE-4]]\00{{.*}}", !{{[0-9]+}}, [[FOR]]} ; [ DW_TAG_lexical_block ]
>>>> > + // CHECK: = !{!"0x100\00{{.*}}", [[FOR_COMPOUND:![0-9]*]], {{.*}} ; [ DW_TAG_auto_variable ] [b] [line [[@LINE+2]]]
>>>> > + // CHECK: [[FOR_COMPOUND]] = !{!"0xb\00[[@LINE-6]]\00{{.*}}", !{{[0-9]+}}, [[FOR_LOOP_INCLUDING_COND]]} ; [ DW_TAG_lexical_block ]
>>>> > bool b = i % 2;
>>>> > }
>>>> >
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