Do not emit debug information for variables while generating optimized code. The llvm optimizer and code generator are not yet ready to support optimized code debugging.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67876 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 17 insertions, 0 deletions

diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index b437f3dfbd..7233bbf8e2 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -19,6 +19,7 @@
 #include "clang/AST/RecordLayout.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/FileManager.h"
+#include "clang/Frontend/CompileOptions.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Instructions.h"
@@ -665,6 +666,13 @@ void CGDebugInfo::EmitDeclare(const VarDecl *Decl, unsigned Tag,
                               llvm::Value *Storage, CGBuilderTy &Builder) {
   assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
 
+  // Do not emit variable debug information while generating optimized code.
+  // The llvm optimizer and code generator are not yet ready to support
+  // optimized code debugging.
+  const CompileOptions &CO = M->getCompileOpts();
+  if (CO.OptimizationLevel)
+    return;
+
   // Get location information.
   SourceManager &SM = M->getContext().getSourceManager();
   unsigned Line = SM.getInstantiationLineNumber(Decl->getLocation());
@@ -697,6 +705,14 @@ void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
 /// EmitGlobalVariable - Emit information about a global variable.
 void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var, 
                                      const VarDecl *Decl) {
+
+  // Do not emit variable debug information while generating optimized code.
+  // The llvm optimizer and code generator are not yet ready to support
+  // optimized code debugging.
+  const CompileOptions &CO = M->getCompileOpts();
+  if (CO.OptimizationLevel)
+    return;
+
   // Create global variable debug descriptor.
   llvm::DICompileUnit Unit = getOrCreateCompileUnit(Decl->getLocation());
   SourceManager &SM = M->getContext().getSourceManager();
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 228020ca79..dbfbf028af 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -159,6 +159,7 @@ public:
 
   CGDebugInfo *getDebugInfo() { return DebugInfo; }
   ASTContext &getContext() const { return Context; }
+  const CompileOptions &getCompileOpts() const { return CompileOpts; }
   const LangOptions &getLangOptions() const { return Features; }
   llvm::Module &getModule() const { return TheModule; }
   CodeGenTypes &getTypes() { return Types; }