[llvm] r327620 - [CodeView] Initial support for emitting S_BLOCK32 symbols for lexical scopes
Reid Kleckner via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 15 13:15:20 PDT 2018
I reverted this in r327657 because it crashed while compiling Chromium.
I'll try to get a reduction soon or re-apply it if the fix is easy.
On Thu, Mar 15, 2018 at 4:54 AM Brock Wyma via llvm-commits <
llvm-commits at lists.llvm.org> wrote:
> Author: bwyma
> Date: Thu Mar 15 04:52:17 2018
> New Revision: 327620
>
> URL: http://llvm.org/viewvc/llvm-project?rev=327620&view=rev
> Log:
> [CodeView] Initial support for emitting S_BLOCK32 symbols for lexical
> scopes
>
> This patch sorts local variables by lexical scope and emits them inside
> an appropriate S_BLOCK32 CodeView symbol.
>
> Differential Revision: https://reviews.llvm.org/D42926
>
>
> Added:
> llvm/trunk/test/DebugInfo/COFF/lexicalblock.ll
> Modified:
> llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
> llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h
> llvm/trunk/test/DebugInfo/COFF/register-variables.ll
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp?rev=327620&r1=327619&r2=327620&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp Thu Mar 15
> 04:52:17 2018
> @@ -365,15 +365,15 @@ unsigned CodeViewDebug::getPointerSizeIn
> }
>
> void CodeViewDebug::recordLocalVariable(LocalVariable &&Var,
> - const DILocation *InlinedAt) {
> - if (InlinedAt) {
> + const LexicalScope *LS) {
> + if (const DILocation *InlinedAt = LS->getInlinedAt()) {
> // This variable was inlined. Associate it with the InlineSite.
> const DISubprogram *Inlinee = Var.DIVar->getScope()->getSubprogram();
> InlineSite &Site = getInlineSite(InlinedAt, Inlinee);
> Site.InlinedLocals.emplace_back(Var);
> } else {
> - // This variable goes in the main ProcSym.
> - CurFn->Locals.emplace_back(Var);
> + // This variable goes into the corresponding lexical scope.
> + ScopeVariables[LS].emplace_back(Var);
> }
> }
>
> @@ -905,6 +905,7 @@ void CodeViewDebug::emitDebugInfoForFunc
> OS.EmitLabel(ProcRecordEnd);
>
> emitLocalVariableList(FI.Locals);
> + emitLexicalBlockList(FI.ChildBlocks, FI);
>
> // Emit inlined call site information. Only emit functions inlined
> directly
> // into the parent function. We'll emit the other sites recursively
> as part
> @@ -1025,7 +1026,7 @@ void CodeViewDebug::collectVariableInfoF
> LocalVariable Var;
> Var.DIVar = VI.Var;
> Var.DefRanges.emplace_back(std::move(DefRange));
> - recordLocalVariable(std::move(Var), VI.Loc->getInlinedAt());
> + recordLocalVariable(std::move(Var), Scope);
> }
> }
>
> @@ -1156,7 +1157,7 @@ void CodeViewDebug::collectVariableInfo(
> Var.DIVar = DIVar;
>
> calculateRanges(Var, Ranges);
> - recordLocalVariable(std::move(Var), InlinedAt);
> + recordLocalVariable(std::move(Var), Scope);
> }
> }
>
> @@ -2362,6 +2363,128 @@ void CodeViewDebug::emitLocalVariable(co
> }
> }
>
> +void CodeViewDebug::emitLexicalBlockList(ArrayRef<LexicalBlock *> Blocks,
> + const FunctionInfo& FI) {
> + for (LexicalBlock *Block : Blocks)
> + emitLexicalBlock(*Block, FI);
> +}
> +
> +/// Emit an S_BLOCK32 and S_END record pair delimiting the contents of a
> +/// lexical block scope.
> +void CodeViewDebug::emitLexicalBlock(const LexicalBlock &Block,
> + const FunctionInfo& FI) {
> + MCSymbol *RecordBegin = MMI->getContext().createTempSymbol(),
> + *RecordEnd = MMI->getContext().createTempSymbol();
> +
> + // Lexical block symbol record.
> + OS.AddComment("Record length");
> + OS.emitAbsoluteSymbolDiff(RecordEnd, RecordBegin, 2); // Record Length
> + OS.EmitLabel(RecordBegin);
> + OS.AddComment("Record kind: S_BLOCK32");
> + OS.EmitIntValue(SymbolKind::S_BLOCK32, 2); // Record Kind
> + OS.AddComment("PtrParent");
> + OS.EmitIntValue(0, 4); // PtrParent
> + OS.AddComment("PtrEnd");
> + OS.EmitIntValue(0, 4); // PtrEnd
> + OS.AddComment("Code size");
> + OS.emitAbsoluteSymbolDiff(Block.End, Block.Begin, 4); // Code Size
> + OS.AddComment("Function section relative address");
> + OS.EmitCOFFSecRel32(Block.Begin, /*Offset=*/0); // Func Offset
> + OS.AddComment("Function section index");
> + OS.EmitCOFFSectionIndex(FI.Begin); // Func Symbol
> + OS.AddComment("Lexical block name");
> + emitNullTerminatedSymbolName(OS, Block.Name); // Name
> + OS.EmitLabel(RecordEnd);
> +
> + // Emit variables local to this lexical block.
> + emitLocalVariableList(Block.Locals);
> +
> + // Emit lexical blocks contained within this block.
> + emitLexicalBlockList(Block.Children, FI);
> +
> + // Close the lexical block scope.
> + OS.AddComment("Record length");
> + OS.EmitIntValue(2, 2); // Record Length
> + OS.AddComment("Record kind: S_END");
> + OS.EmitIntValue(SymbolKind::S_END, 2); // Record Kind
> +}
> +
> +/// Convenience routine for collecting lexical block information for a
> list
> +/// of lexical scopes.
> +void CodeViewDebug::collectLexicalBlockInfo(
> + SmallVectorImpl<LexicalScope *> &Scopes,
> + SmallVectorImpl<LexicalBlock *> &Blocks,
> + SmallVectorImpl<LocalVariable> &Locals) {
> + for (LexicalScope *Scope : Scopes)
> + collectLexicalBlockInfo(*Scope, Blocks, Locals);
> +}
> +
> +/// Populate the lexical blocks and local variable lists of the parent
> with
> +/// information about the specified lexical scope.
> +void CodeViewDebug::collectLexicalBlockInfo(
> + LexicalScope &Scope,
> + SmallVectorImpl<LexicalBlock *> &ParentBlocks,
> + SmallVectorImpl<LocalVariable> &ParentLocals) {
> + if (Scope.isAbstractScope())
> + return;
> +
> + auto LocalsIter = ScopeVariables.find(&Scope);
> + if (LocalsIter == ScopeVariables.end()) {
> + // This scope does not contain variables and can be eliminated.
> + collectLexicalBlockInfo(Scope.getChildren(), ParentBlocks,
> ParentLocals);
> + return;
> + }
> + SmallVectorImpl<LocalVariable> &Locals = LocalsIter->second;
> +
> + const DILexicalBlock *DILB =
> dyn_cast<DILexicalBlock>(Scope.getScopeNode());
> + if (!DILB) {
> + // This scope is not a lexical block and can be eliminated, but keep
> any
> + // local variables it contains.
> + ParentLocals.append(Locals.begin(), Locals.end());
> + collectLexicalBlockInfo(Scope.getChildren(), ParentBlocks,
> ParentLocals);
> + return;
> + }
> +
> + const SmallVectorImpl<InsnRange> &Ranges = Scope.getRanges();
> + if (Ranges.size() != 1 || !getLabelAfterInsn(Ranges.front().second)) {
> + // This lexical block scope has too many address ranges to represent
> in the
> + // current CodeView format or does not have a valid address range.
> + // Eliminate this lexical scope and promote any locals it contains to
> the
> + // parent scope.
> + //
> + // For lexical scopes with multiple address ranges you may be tempted
> to
> + // construct a single range covering every instruction where the
> block is
> + // live and everything in between. Unfortunately, Visual Studio only
> + // displays variables from the first matching lexical block scope.
> If the
> + // first lexical block contains exception handling code or cold code
> which
> + // is moved to the bottom of the routine creating a single range
> covering
> + // nearly the entire routine, then it will hide all other lexical
> blocks
> + // and the variables they contain.
> + //
> + ParentLocals.append(Locals.begin(), Locals.end());
> + collectLexicalBlockInfo(Scope.getChildren(), ParentBlocks,
> ParentLocals);
> + return;
> + }
> +
> + // Create a new CodeView lexical block for this lexical scope. If we've
> + // seen this DILexicalBlock before then the scope tree is malformed and
> + // we can handle this gracefully by not processing it a second time.
> + auto BlockInsertion = CurFn->LexicalBlocks.insert({DILB,
> LexicalBlock()});
> + if (!BlockInsertion.second)
> + return;
> +
> + // Create a lexical block containing the local variables and collect the
> + // the lexical block information for the children.
> + const InsnRange &Range = Ranges.front();
> + LexicalBlock &Block = BlockInsertion.first->second;
> + Block.Begin = getLabelBeforeInsn(Range.first);
> + Block.End = getLabelAfterInsn(Range.second);
> + Block.Name = DILB->getName();
> + Block.Locals = std::move(Locals);
> + ParentBlocks.push_back(&Block);
> + collectLexicalBlockInfo(Scope.getChildren(), Block.Children,
> Block.Locals);
> +}
> +
> void CodeViewDebug::endFunctionImpl(const MachineFunction *MF) {
> const Function &GV = MF->getFunction();
> assert(FnDebugInfo.count(&GV));
> @@ -2369,6 +2492,15 @@ void CodeViewDebug::endFunctionImpl(cons
>
> collectVariableInfo(GV.getSubprogram());
>
> + // Build the lexical block structure to emit for this routine.
> + if (LexicalScope *CFS = LScopes.getCurrentFunctionScope())
> + collectLexicalBlockInfo(*CFS, CurFn->ChildBlocks, CurFn->Locals);
> +
> + // Clear the scope and variable information from the map which will not
> be
> + // valid after we have finished processing this routine. This also
> prepares
> + // the map for the subsequent routine.
> + ScopeVariables.clear();
> +
> // Don't emit anything if we don't have any line tables.
> if (!CurFn->HaveLineInfo) {
> FnDebugInfo.erase(&GV);
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h?rev=327620&r1=327619&r2=327620&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h Thu Mar 15 04:52:17
> 2018
> @@ -107,6 +107,15 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDe
> unsigned SiteFuncId = 0;
> };
>
> + // Combines information from DILexicalBlock and LexicalScope.
> + struct LexicalBlock {
> + SmallVector<LocalVariable, 1> Locals;
> + SmallVector<LexicalBlock *, 1> Children;
> + const MCSymbol *Begin;
> + const MCSymbol *End;
> + StringRef Name;
> + };
> +
> // For each function, store a vector of labels to its instructions, as
> well as
> // to the end of the function.
> struct FunctionInfo {
> @@ -119,6 +128,11 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDe
>
> SmallVector<LocalVariable, 1> Locals;
>
> + std::unordered_map<const DILexicalBlockBase*, LexicalBlock>
> LexicalBlocks;
> +
> + // Lexical blocks containing local variables.
> + SmallVector<LexicalBlock *, 1> ChildBlocks;
> +
> std::vector<std::pair<MCSymbol *, MDNode *>> Annotations;
>
> const MCSymbol *Begin = nullptr;
> @@ -129,6 +143,12 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDe
> };
> FunctionInfo *CurFn = nullptr;
>
> + // Map used to seperate variables according to the lexical scope they
> belong
> + // in. This is populated by recordLocalVariable() before
> + // collectLexicalBlocks() separates the variables between the
> FunctionInfo
> + // and LexicalBlocks.
> + DenseMap<const LexicalScope *, SmallVector<LocalVariable, 1>>
> ScopeVariables;
> +
> /// The set of comdat .debug$S sections that we've seen so far. Each
> section
> /// must start with a magic version number that must only be emitted
> once.
> /// This set tracks which sections we've already opened.
> @@ -253,9 +273,18 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDe
>
> void collectVariableInfoFromMFTable(DenseSet<InlinedVariable>
> &Processed);
>
> + // Construct the lexical block tree for a routine, pruning emptpy
> lexical
> + // scopes, and populate it with local variables.
> + void collectLexicalBlockInfo(SmallVectorImpl<LexicalScope *> &Scopes,
> + SmallVectorImpl<LexicalBlock *> &Blocks,
> + SmallVectorImpl<LocalVariable> &Locals);
> + void collectLexicalBlockInfo(LexicalScope &Scope,
> + SmallVectorImpl<LexicalBlock *>
> &ParentBlocks,
> + SmallVectorImpl<LocalVariable>
> &ParentLocals);
> +
> /// Records information about a local variable in the appropriate
> scope. In
> /// particular, locals from inlined code live inside the inlining site.
> - void recordLocalVariable(LocalVariable &&Var, const DILocation *Loc);
> + void recordLocalVariable(LocalVariable &&Var, const LexicalScope *LS);
>
> /// Emits local variables in the appropriate order.
> void emitLocalVariableList(ArrayRef<LocalVariable> Locals);
> @@ -263,6 +292,13 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDe
> /// Emits an S_LOCAL record and its associated defined ranges.
> void emitLocalVariable(const LocalVariable &Var);
>
> + /// Emits a sequence of lexical block scopes and their children.
> + void emitLexicalBlockList(ArrayRef<LexicalBlock *> Blocks,
> + const FunctionInfo& FI);
> +
> + /// Emit a lexical block scope and its children.
> + void emitLexicalBlock(const LexicalBlock &Block, const FunctionInfo&
> FI);
> +
> /// Translates the DIType to codeview if necessary and returns a type
> index
> /// for it.
> codeview::TypeIndex getTypeIndex(DITypeRef TypeRef,
>
> Added: llvm/trunk/test/DebugInfo/COFF/lexicalblock.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/COFF/lexicalblock.ll?rev=327620&view=auto
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/COFF/lexicalblock.ll (added)
> +++ llvm/trunk/test/DebugInfo/COFF/lexicalblock.ll Thu Mar 15 04:52:17 2018
> @@ -0,0 +1,328 @@
> +; RUN: llc < %s -filetype=obj | llvm-readobj - -codeview | FileCheck %s
> +;
> +; -- lexicablock.cxx begin
> ----------------------------------------------------
> +; int main(int argc, char *argv[]) {
> +; int localA = 1;
> +;
> +; { // S_BLOCK32 not emitted because it has multiple address ranges.
> +; int localB = 2;
> +;
> +; if (__builtin_expect(argc != 1, 0)) { // S_BLOCK32 containing
> 'localC'
> +; int localC = 3;
> +; }
> +; }
> +;
> +; { // S_BLOCK32 containing 'localD'
> +; int localD = 4;
> +; localA = localD;
> +; }
> +;
> +; { // S_BLOCK32 not emitted
> +; { // S_BLOCK32 containing 'localE'
> +; int localE = 5;
> +; localA = localE;
> +; }
> +; }
> +;
> +; { // S_BLOCK32 containing 'localF'
> +; int localF = 6;
> +; localA = localF;
> +;
> +; { // S_BLOCK32 containing 'localG'
> +; int localG = 7;
> +; localA = localG;
> +; }
> +; }
> +;
> +; if (localA == 7) { // S_BLOCK32 containing 'localH'
> +; int localH = 8;
> +; localA = localH;
> +; }
> +;
> +; return localA != 8 ? -1 : 0;
> +; }
> +; -- lexicalblock.cxx end
> -----------------------------------------------------
> +;
> +; To regenerate the IR below:
> +; $ clang -cc1 -triple i686-pc-windows -emit-llvm -o lexicalblock.tmp
> -debug-info-kind=limited -gcodeview lexicablock.cxx -O1 -disable-llvm-passes
> +; $ opt -lower-expect -S -o lexicalblock.ll < lexicalblock.tmp
> +;
> +; The commands above split the lexical block containing localB and localC
> into
> +; two parts, thus creating multiple ranges for the containing lexical
> block
> +; without optimizing out the whole thing.
> +;
> +; CHECK: {{.*}}Proc{{.*}}Sym {
> +; CHECK: DisplayName: main
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: argc
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: argv
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localA
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localB
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localC
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: Kind: S_END {{.*}}
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localD
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: Kind: S_END {{.*}}
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localE
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localF
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localG
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: Kind: S_END {{.*}}
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: Kind: S_END {{.*}}
> +; CHECK: }
> +; CHECK: BlockSym {
> +; CHECK: Kind: S_BLOCK32 {{.*}}
> +; CHECK: BlockName:
> +; CHECK: }
> +; CHECK: LocalSym {
> +; CHECK: VarName: localH
> +; CHECK: }
> +; CHECK: ScopeEndSym {
> +; CHECK: Kind: S_END {{.*}}
> +; CHECK: }
> +; CHECK: ProcEnd {
> +; CHECK: }
> +;
> +; ModuleID = 'lexicalblock.cxx'
> +source_filename = "lexicalblock.cxx"
> +target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
> +target triple = "i686-pc-windows-msvc"
> +
> +; Function Attrs: norecurse nounwind
> +define i32 @main(i32 %argc, i8** %argv) #0 !dbg !8 {
> +entry:
> + %retval = alloca i32, align 4
> + %argv.addr = alloca i8**, align 4
> + %argc.addr = alloca i32, align 4
> + %localA = alloca i32, align 4
> + %localB = alloca i32, align 4
> + %localC = alloca i32, align 4
> + %localD = alloca i32, align 4
> + %localE = alloca i32, align 4
> + %localF = alloca i32, align 4
> + %localG = alloca i32, align 4
> + %localH = alloca i32, align 4
> + store i32 0, i32* %retval, align 4
> + store i8** %argv, i8*** %argv.addr, align 4, !tbaa !37
> + call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !17,
> metadata !DIExpression()), !dbg !41
> + store i32 %argc, i32* %argc.addr, align 4, !tbaa !42
> + call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !18,
> metadata !DIExpression()), !dbg !41
> + %0 = bitcast i32* %localA to i8*, !dbg !44
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %0) #4, !dbg !44
> + call void @llvm.dbg.declare(metadata i32* %localA, metadata !19,
> metadata !DIExpression()), !dbg !44
> + store i32 1, i32* %localA, align 4, !dbg !44, !tbaa !42
> + %1 = bitcast i32* %localB to i8*, !dbg !45
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #4, !dbg !45
> + call void @llvm.dbg.declare(metadata i32* %localB, metadata !20,
> metadata !DIExpression()), !dbg !45
> + store i32 2, i32* %localB, align 4, !dbg !45, !tbaa !42
> + %2 = load i32, i32* %argc.addr, align 4, !dbg !46, !tbaa !42
> + %cmp = icmp ne i32 %2, 1, !dbg !46
> + %conv = zext i1 %cmp to i32, !dbg !46
> + %tobool = icmp ne i32 %conv, 0, !dbg !46
> + br i1 %tobool, label %if.then, label %if.end, !dbg !46, !prof !47
> +
> +if.then: ; preds = %entry
> + %3 = bitcast i32* %localC to i8*, !dbg !48
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %3) #4, !dbg !48
> + call void @llvm.dbg.declare(metadata i32* %localC, metadata !22,
> metadata !DIExpression()), !dbg !48
> + store i32 3, i32* %localC, align 4, !dbg !48, !tbaa !42
> + %4 = bitcast i32* %localC to i8*, !dbg !49
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %4) #4, !dbg !49
> + br label %if.end, !dbg !49
> +
> +if.end: ; preds = %if.then,
> %entry
> + %5 = bitcast i32* %localB to i8*, !dbg !50
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %5) #4, !dbg !50
> + %6 = bitcast i32* %localD to i8*, !dbg !51
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %6) #4, !dbg !51
> + call void @llvm.dbg.declare(metadata i32* %localD, metadata !25,
> metadata !DIExpression()), !dbg !51
> + store i32 4, i32* %localD, align 4, !dbg !51, !tbaa !42
> + %7 = load i32, i32* %localD, align 4, !dbg !52, !tbaa !42
> + store i32 %7, i32* %localA, align 4, !dbg !52, !tbaa !42
> + %8 = bitcast i32* %localD to i8*, !dbg !53
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %8) #4, !dbg !53
> + %9 = bitcast i32* %localE to i8*, !dbg !54
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %9) #4, !dbg !54
> + call void @llvm.dbg.declare(metadata i32* %localE, metadata !27,
> metadata !DIExpression()), !dbg !54
> + store i32 5, i32* %localE, align 4, !dbg !54, !tbaa !42
> + %10 = load i32, i32* %localE, align 4, !dbg !55, !tbaa !42
> + store i32 %10, i32* %localA, align 4, !dbg !55, !tbaa !42
> + %11 = bitcast i32* %localE to i8*, !dbg !56
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %11) #4, !dbg !56
> + %12 = bitcast i32* %localF to i8*, !dbg !57
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %12) #4, !dbg !57
> + call void @llvm.dbg.declare(metadata i32* %localF, metadata !30,
> metadata !DIExpression()), !dbg !57
> + store i32 6, i32* %localF, align 4, !dbg !57, !tbaa !42
> + %13 = load i32, i32* %localF, align 4, !dbg !58, !tbaa !42
> + store i32 %13, i32* %localA, align 4, !dbg !58, !tbaa !42
> + %14 = bitcast i32* %localG to i8*, !dbg !59
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %14) #4, !dbg !59
> + call void @llvm.dbg.declare(metadata i32* %localG, metadata !32,
> metadata !DIExpression()), !dbg !59
> + store i32 7, i32* %localG, align 4, !dbg !59, !tbaa !42
> + %15 = load i32, i32* %localG, align 4, !dbg !60, !tbaa !42
> + store i32 %15, i32* %localA, align 4, !dbg !60, !tbaa !42
> + %16 = bitcast i32* %localG to i8*, !dbg !61
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %16) #4, !dbg !61
> + %17 = bitcast i32* %localF to i8*, !dbg !62
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %17) #4, !dbg !62
> + %18 = load i32, i32* %localA, align 4, !dbg !63, !tbaa !42
> + %cmp1 = icmp eq i32 %18, 7, !dbg !63
> + br i1 %cmp1, label %if.then2, label %if.end3, !dbg !63
> +
> +if.then2: ; preds = %if.end
> + %19 = bitcast i32* %localH to i8*, !dbg !64
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* %19) #4, !dbg !64
> + call void @llvm.dbg.declare(metadata i32* %localH, metadata !34,
> metadata !DIExpression()), !dbg !64
> + store i32 8, i32* %localH, align 4, !dbg !64, !tbaa !42
> + %20 = load i32, i32* %localH, align 4, !dbg !65, !tbaa !42
> + store i32 %20, i32* %localA, align 4, !dbg !65, !tbaa !42
> + %21 = bitcast i32* %localH to i8*, !dbg !66
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %21) #4, !dbg !66
> + br label %if.end3, !dbg !66
> +
> +if.end3: ; preds = %if.then2,
> %if.end
> + %22 = load i32, i32* %localA, align 4, !dbg !67, !tbaa !42
> + %cmp4 = icmp ne i32 %22, 8, !dbg !67
> + %23 = zext i1 %cmp4 to i64, !dbg !67
> + %cond = select i1 %cmp4, i32 -1, i32 0, !dbg !67
> + %24 = bitcast i32* %localA to i8*, !dbg !68
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* %24) #4, !dbg !68
> + ret i32 %cond, !dbg !67
> +}
> +
> +; Function Attrs: nounwind readnone speculatable
> +declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
> +
> +; Function Attrs: argmemonly nounwind
> +declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2
> +
> +; Function Attrs: nounwind readnone
> +declare i32 @llvm.expect.i32(i32, i32) #3
> +
> +; Function Attrs: argmemonly nounwind
> +declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2
> +
> +attributes #0 = { norecurse nounwind
> "correctly-rounded-divide-sqrt-fp-math"="false"
> "disable-tail-calls"="false" "less-precise-fpmad"="false"
> "no-frame-pointer-elim"="false" "no-infs-fp-math"="false"
> "no-jump-tables"="false" "no-nans-fp-math"="false"
> "no-signed-zeros-fp-math"="false" "no-trapping-math"="false"
> "stack-protector-buffer-size"="8" "target-features"="+x87"
> "unsafe-fp-math"="false" "use-soft-float"="false" }
> +attributes #1 = { nounwind readnone speculatable }
> +attributes #2 = { argmemonly nounwind }
> +attributes #3 = { nounwind readnone }
> +attributes #4 = { nounwind }
> +
> +!llvm.dbg.cu = !{!0}
> +!llvm.module.flags = !{!3, !4, !5, !6}
> +!llvm.ident = !{!7}
> +
> +!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1,
> producer: "clang version 7.0.0 (trunk)", isOptimized: true, runtimeVersion:
> 0, emissionKind: FullDebug, enums: !2)
> +!1 = !DIFile(filename: "<stdin>", directory: "C:/path/to/directory",
> checksumkind: CSK_MD5, checksum: "169b810b4f895de9a9e19d8d0634af5d")
> +!2 = !{}
> +!3 = !{i32 1, !"NumRegisterParameters", i32 0}
> +!4 = !{i32 2, !"CodeView", i32 1}
> +!5 = !{i32 2, !"Debug Info Version", i32 3}
> +!6 = !{i32 1, !"wchar_size", i32 2}
> +!7 = !{!"clang version 7.0.0 (trunk)"}
> +!8 = distinct !DISubprogram(name: "main", scope: !9, file: !9, line: 1,
> type: !10, isLocal: false, isDefinition: true, scopeLine: 1, flags:
> DIFlagPrototyped, isOptimized: true, unit: !0, variables: !16)
> +!9 = !DIFile(filename: "lexicalblock.cxx", directory:
> "C:/path/to/directory", checksumkind: CSK_MD5, checksum:
> "169b810b4f895de9a9e19d8d0634af5d")
> +!10 = !DISubroutineType(types: !11)
> +!11 = !{!12, !12, !13}
> +!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
> +!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 32)
> +!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 32)
> +!15 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
> +!16 = !{!17, !18, !19, !20, !22, !25, !27, !30, !32, !34}
> +!17 = !DILocalVariable(name: "argv", arg: 2, scope: !8, file: !9, line:
> 1, type: !13)
> +!18 = !DILocalVariable(name: "argc", arg: 1, scope: !8, file: !9, line:
> 1, type: !12)
> +!19 = !DILocalVariable(name: "localA", scope: !8, file: !9, line: 2,
> type: !12)
> +!20 = !DILocalVariable(name: "localB", scope: !21, file: !9, line: 5,
> type: !12)
> +!21 = distinct !DILexicalBlock(scope: !8, file: !9, line: 4)
> +!22 = !DILocalVariable(name: "localC", scope: !23, file: !9, line: 8,
> type: !12)
> +!23 = distinct !DILexicalBlock(scope: !24, file: !9, line: 7)
> +!24 = distinct !DILexicalBlock(scope: !21, file: !9, line: 7)
> +!25 = !DILocalVariable(name: "localD", scope: !26, file: !9, line: 13,
> type: !12)
> +!26 = distinct !DILexicalBlock(scope: !8, file: !9, line: 12)
> +!27 = !DILocalVariable(name: "localE", scope: !28, file: !9, line: 19,
> type: !12)
> +!28 = distinct !DILexicalBlock(scope: !29, file: !9, line: 18)
> +!29 = distinct !DILexicalBlock(scope: !8, file: !9, line: 17)
> +!30 = !DILocalVariable(name: "localF", scope: !31, file: !9, line: 25,
> type: !12)
> +!31 = distinct !DILexicalBlock(scope: !8, file: !9, line: 24)
> +!32 = !DILocalVariable(name: "localG", scope: !33, file: !9, line: 29,
> type: !12)
> +!33 = distinct !DILexicalBlock(scope: !31, file: !9, line: 28)
> +!34 = !DILocalVariable(name: "localH", scope: !35, file: !9, line: 35,
> type: !12)
> +!35 = distinct !DILexicalBlock(scope: !36, file: !9, line: 34)
> +!36 = distinct !DILexicalBlock(scope: !8, file: !9, line: 34)
> +!37 = !{!38, !38, i64 0}
> +!38 = !{!"any pointer", !39, i64 0}
> +!39 = !{!"omnipotent char", !40, i64 0}
> +!40 = !{!"Simple C++ TBAA"}
> +!41 = !DILocation(line: 1, scope: !8)
> +!42 = !{!43, !43, i64 0}
> +!43 = !{!"int", !39, i64 0}
> +!44 = !DILocation(line: 2, scope: !8)
> +!45 = !DILocation(line: 5, scope: !21)
> +!46 = !DILocation(line: 7, scope: !21)
> +!47 = !{!"branch_weights", i32 1, i32 2000}
> +!48 = !DILocation(line: 8, scope: !23)
> +!49 = !DILocation(line: 9, scope: !23)
> +!50 = !DILocation(line: 10, scope: !21)
> +!51 = !DILocation(line: 13, scope: !26)
> +!52 = !DILocation(line: 14, scope: !26)
> +!53 = !DILocation(line: 15, scope: !26)
> +!54 = !DILocation(line: 19, scope: !28)
> +!55 = !DILocation(line: 20, scope: !28)
> +!56 = !DILocation(line: 21, scope: !28)
> +!57 = !DILocation(line: 25, scope: !31)
> +!58 = !DILocation(line: 26, scope: !31)
> +!59 = !DILocation(line: 29, scope: !33)
> +!60 = !DILocation(line: 30, scope: !33)
> +!61 = !DILocation(line: 31, scope: !33)
> +!62 = !DILocation(line: 32, scope: !31)
> +!63 = !DILocation(line: 34, scope: !8)
> +!64 = !DILocation(line: 35, scope: !35)
> +!65 = !DILocation(line: 36, scope: !35)
> +!66 = !DILocation(line: 37, scope: !35)
> +!67 = !DILocation(line: 39, scope: !8)
> +!68 = !DILocation(line: 40, scope: !8)
>
> Modified: llvm/trunk/test/DebugInfo/COFF/register-variables.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/COFF/register-variables.ll?rev=327620&r1=327619&r2=327620&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/COFF/register-variables.ll (original)
> +++ llvm/trunk/test/DebugInfo/COFF/register-variables.ll Thu Mar 15
> 04:52:17 2018
> @@ -61,12 +61,12 @@
> ; ASM: .cv_def_range .Lfunc_begin0 [[p_ecx_esi]],
> "A\021\022\000\000\000"
> ; ASM: .cv_def_range [[p_ecx_esi]] [[func_end]],
> "A\021\027\000\000\000"
> ; ASM: .short 4414 # Record kind: S_LOCAL
> -; ASM: .asciz "a"
> -; ASM: .cv_def_range [[after_getint]] [[after_inc_eax]],
> "A\021\021\000\000\000"
> -; ASM: .short 4414 # Record kind: S_LOCAL
> ; ASM: .asciz "c"
> ; ASM: .cv_def_range [[after_getint]] [[after_je]],
> "A\021\021\000\000\000"
> ; ASM: .short 4414 # Record kind: S_LOCAL
> +; ASM: .asciz "a"
> +; ASM: .cv_def_range [[after_getint]] [[after_inc_eax]],
> "A\021\021\000\000\000"
> +; ASM: .short 4414 # Record kind: S_LOCAL
> ; ASM: .asciz "b"
> ; ASM: .cv_def_range [[after_inc_eax]] [[after_if]],
> "A\021\021\000\000\000"
>
> @@ -111,28 +111,28 @@
> ; OBJ: Type: int (0x74)
> ; OBJ: Flags [ (0x0)
> ; OBJ: ]
> -; OBJ: VarName: a
> +; OBJ: VarName: c
> ; OBJ: }
> ; OBJ: DefRangeRegisterSym {
> ; OBJ: Register: EAX (0x11)
> ; OBJ: LocalVariableAddrRange {
> ; OBJ: OffsetStart: .text+0xC
> ; OBJ: ISectStart: 0x0
> -; OBJ: Range: 0x7
> +; OBJ: Range: 0x4
> ; OBJ: }
> ; OBJ: }
> ; OBJ: LocalSym {
> ; OBJ: Type: int (0x74)
> ; OBJ: Flags [ (0x0)
> ; OBJ: ]
> -; OBJ: VarName: c
> +; OBJ: VarName: a
> ; OBJ: }
> ; OBJ: DefRangeRegisterSym {
> ; OBJ: Register: EAX (0x11)
> ; OBJ: LocalVariableAddrRange {
> ; OBJ: OffsetStart: .text+0xC
> ; OBJ: ISectStart: 0x0
> -; OBJ: Range: 0x4
> +; OBJ: Range: 0x7
> ; OBJ: }
> ; OBJ: }
> ; OBJ: LocalSym {
>
>
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>
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