Author: hsiangkai Date: Wed Sep 26 15:18:45 2018 New Revision: 343148 URL: http://llvm.org/viewvc/llvm-project?rev=343148&view=rev Log: [DebugInfo] Generate debug information for labels.
Generate DILabel metadata and call llvm.dbg.label after label statement to associate the metadata with the label. After fixing PR37395. After fixing problems in LiveDebugVariables. After fixing NULL symbol problems in AddressPool when enabling split-dwarf-file. Differential Revision: https://reviews.llvm.org/D45045 Added: cfe/trunk/test/CodeGen/debug-label-inline.c cfe/trunk/test/CodeGen/debug-label.c Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp cfe/trunk/lib/CodeGen/CGDebugInfo.h cfe/trunk/lib/CodeGen/CGStmt.cpp Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=343148&r1=343147&r2=343148&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original) +++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Wed Sep 26 15:18:45 2018 @@ -3767,6 +3767,32 @@ CGDebugInfo::EmitDeclareOfAutoVariable(c return EmitDeclare(VD, Storage, llvm::None, Builder); } +void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) { + assert(DebugKind >= codegenoptions::LimitedDebugInfo); + assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"); + + if (D->hasAttr<NoDebugAttr>()) + return; + + auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); + llvm::DIFile *Unit = getOrCreateFile(D->getLocation()); + + // Get location information. + unsigned Line = getLineNumber(D->getLocation()); + unsigned Column = getColumnNumber(D->getLocation()); + + StringRef Name = D->getName(); + + // Create the descriptor for the label. + auto *L = + DBuilder.createLabel(Scope, Name, Unit, Line, CGM.getLangOpts().Optimize); + + // Insert an llvm.dbg.label into the current block. + DBuilder.insertLabel(L, + llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), + Builder.GetInsertBlock()); +} + llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy, llvm::DIType *Ty) { llvm::DIType *CachedTy = getTypeOrNull(QualTy); Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.h URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=343148&r1=343147&r2=343148&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGDebugInfo.h (original) +++ cfe/trunk/lib/CodeGen/CGDebugInfo.h Wed Sep 26 15:18:45 2018 @@ -415,6 +415,9 @@ public: llvm::Value *AI, CGBuilderTy &Builder); + /// Emit call to \c llvm.dbg.label for an label. + void EmitLabel(const LabelDecl *D, CGBuilderTy &Builder); + /// Emit call to \c llvm.dbg.declare for an imported variable /// declaration in a block. void EmitDeclareOfBlockDeclRefVariable( Modified: cfe/trunk/lib/CodeGen/CGStmt.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmt.cpp?rev=343148&r1=343147&r2=343148&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGStmt.cpp (original) +++ cfe/trunk/lib/CodeGen/CGStmt.cpp Wed Sep 26 15:18:45 2018 @@ -531,6 +531,16 @@ void CodeGenFunction::EmitLabel(const La } EmitBlock(Dest.getBlock()); + + // Emit debug info for labels. + if (CGDebugInfo *DI = getDebugInfo()) { + if (CGM.getCodeGenOpts().getDebugInfo() >= + codegenoptions::LimitedDebugInfo) { + DI->setLocation(D->getLocation()); + DI->EmitLabel(D, Builder); + } + } + incrementProfileCounter(D->getStmt()); } Added: cfe/trunk/test/CodeGen/debug-label-inline.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/debug-label-inline.c?rev=343148&view=auto ============================================================================== --- cfe/trunk/test/CodeGen/debug-label-inline.c (added) +++ cfe/trunk/test/CodeGen/debug-label-inline.c Wed Sep 26 15:18:45 2018 @@ -0,0 +1,28 @@ +// This test will test the correctness of generating DILabel and +// llvm.dbg.label when the label is in inlined functions. +// +// RUN: %clang_cc1 -O2 %s -o - -emit-llvm -debug-info-kind=limited | FileCheck %s +inline int f1(int a, int b) { + int sum; + +top: + sum = a + b; + return sum; +} + +extern int ga, gb; + +int f2(void) { + int result; + + result = f1(ga, gb); + // CHECK: call void @llvm.dbg.label(metadata [[LABEL_METADATA:!.*]]), !dbg [[LABEL_LOCATION:!.*]] + + return result; +} + +// CHECK: distinct !DISubprogram(name: "f1", {{.*}}, retainedNodes: [[ELEMENTS:!.*]]) +// CHECK: [[ELEMENTS]] = !{{{.*}}, [[LABEL_METADATA]]} +// CHECK: [[LABEL_METADATA]] = !DILabel({{.*}}, name: "top", {{.*}}, line: 8) +// CHECK: [[INLINEDAT:!.*]] = distinct !DILocation(line: 18, +// CHECK: [[LABEL_LOCATION]] = !DILocation(line: 8, {{.*}}, inlinedAt: [[INLINEDAT]]) Added: cfe/trunk/test/CodeGen/debug-label.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/debug-label.c?rev=343148&view=auto ============================================================================== --- cfe/trunk/test/CodeGen/debug-label.c (added) +++ cfe/trunk/test/CodeGen/debug-label.c Wed Sep 26 15:18:45 2018 @@ -0,0 +1,16 @@ +// This test will test the correstness of generating DILabel and +// llvm.dbg.label for labels. +// +// RUN: %clang_cc1 -emit-llvm %s -o - -emit-llvm -debug-info-kind=limited | FileCheck %s + +int f1(int a, int b) { + int sum; + +top: + // CHECK: call void @llvm.dbg.label(metadata [[LABEL_METADATA:!.*]]), !dbg [[LABEL_LOCATION:!.*]] + sum = a + b; + return sum; +} + +// CHECK: [[LABEL_METADATA]] = !DILabel({{.*}}, name: "top", {{.*}}, line: 9) +// CHECK: [[LABEL_LOCATION]] = !DILocation(line: 9, _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
