[asan] Don't run stack malloc on functions containing inline assembly.

[oota-llvm.git] / lib / Transforms / Instrumentation / AddressSanitizer.cpp

diff --git a/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 2dd2fe6211c3d2017604c8ca6894634c67828bec..ff4368198be2f419fd9f8ec0ace81e4b5806c6be 100644 (file)
--- a/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1753,11 +1753,10 @@ void FunctionStackPoisoner::poisonStack() {
   uint64_t LocalStackSize = L.FrameSize;
   bool DoStackMalloc = ClUseAfterReturn && !ASan.CompileKernel &&
                        LocalStackSize <= kMaxStackMallocSize;
-  // Don't do dynamic alloca in presence of inline asm: too often it makes
-  // assumptions on which registers are available. Don't do stack malloc in the
-  // presence of inline asm on 32-bit platforms for the same reason.
+  // Don't do dynamic alloca or stack malloc in presence of inline asm:
+  // too often it makes assumptions on which registers are available.
   bool DoDynamicAlloca = ClDynamicAllocaStack && !HasNonEmptyInlineAsm;
-  DoStackMalloc &= !HasNonEmptyInlineAsm || ASan.LongSize != 32;
+  DoStackMalloc &= !HasNonEmptyInlineAsm;
 
   Value *StaticAlloca =
       DoDynamicAlloca ? nullptr : createAllocaForLayout(IRB, L, false);