[llvm] r327620 - [CodeView] Initial support for emitting S_BLOCK32 symbols for lexical scopes
Brock Wyma via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 15 04:52:17 PDT 2018
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 {
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