diff options
author | Kostya Serebryany <kcc@google.com> | 2012-04-24 06:57:01 +0000 |
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committer | Kostya Serebryany <kcc@google.com> | 2012-04-24 06:57:01 +0000 |
commit | c9fe6056e4ce8ffad1ef439fca3318a5faf1c075 (patch) | |
tree | f18e188f2dbd00fc655808c23d90c0e187611d60 /lib/CodeGen/CodeGenTBAA.cpp | |
parent | 8ac95f19e6b8efc453de972dfb22ca56d54c627e (diff) |
enable TBAA when -fthread-sanitizer is given, even with -O0 or -relaxed-aliasing
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155430 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CodeGenTBAA.cpp')
-rw-r--r-- | lib/CodeGen/CodeGenTBAA.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/CodeGen/CodeGenTBAA.cpp b/lib/CodeGen/CodeGenTBAA.cpp index a3cadcf392..e9164dc304 100644 --- a/lib/CodeGen/CodeGenTBAA.cpp +++ b/lib/CodeGen/CodeGenTBAA.cpp @@ -18,6 +18,7 @@ #include "CodeGenTBAA.h" #include "clang/AST/ASTContext.h" #include "clang/AST/Mangle.h" +#include "clang/Frontend/CodeGenOptions.h" #include "llvm/LLVMContext.h" #include "llvm/Metadata.h" #include "llvm/Constants.h" @@ -26,8 +27,10 @@ using namespace clang; using namespace CodeGen; CodeGenTBAA::CodeGenTBAA(ASTContext &Ctx, llvm::LLVMContext& VMContext, + const CodeGenOptions &CGO, const LangOptions &Features, MangleContext &MContext) - : Context(Ctx), VMContext(VMContext), Features(Features), MContext(MContext), + : Context(Ctx), VMContext(VMContext), CodeGenOpts(CGO), + Features(Features), MContext(MContext), MDHelper(VMContext), Root(0), Char(0) { } @@ -74,6 +77,10 @@ static bool TypeHasMayAlias(QualType QTy) { llvm::MDNode * CodeGenTBAA::getTBAAInfo(QualType QTy) { + // At -O0 TBAA is not emitted for regular types. + if (CodeGenOpts.OptimizationLevel == 0 || CodeGenOpts.RelaxedAliasing) + return NULL; + // If the type has the may_alias attribute (even on a typedef), it is // effectively in the general char alias class. if (TypeHasMayAlias(QTy)) |