diff options
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Transforms/Instrumentation/MemorySanitizer.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/lib/Transforms/Instrumentation/MemorySanitizer.cpp index ed0f89bfb5..8cc0084db5 100644 --- a/lib/Transforms/Instrumentation/MemorySanitizer.cpp +++ b/lib/Transforms/Instrumentation/MemorySanitizer.cpp @@ -503,15 +503,16 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> { /// address. /// /// OriginAddr = (ShadowAddr + OriginOffset) & ~3ULL - /// = Addr & (~ShadowMask & ~3ULL) + OriginOffset Value *getOriginPtr(Value *Addr, IRBuilder<> &IRB) { Value *ShadowLong = IRB.CreateAnd(IRB.CreatePointerCast(Addr, MS.IntptrTy), - ConstantInt::get(MS.IntptrTy, ~MS.ShadowMask & ~3ULL)); + ConstantInt::get(MS.IntptrTy, ~MS.ShadowMask)); Value *Add = IRB.CreateAdd(ShadowLong, ConstantInt::get(MS.IntptrTy, MS.OriginOffset)); - return IRB.CreateIntToPtr(Add, PointerType::get(IRB.getInt32Ty(), 0)); + Value *SecondAnd = + IRB.CreateAnd(Add, ConstantInt::get(MS.IntptrTy, ~3ULL)); + return IRB.CreateIntToPtr(SecondAnd, PointerType::get(IRB.getInt32Ty(), 0)); } /// \brief Compute the shadow address for a given function argument. |