diff options
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCalls.cpp | 2 | ||||
| -rw-r--r-- | test/Transforms/InstCombine/objsize.ll | 11 |
2 files changed, 13 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp index 603a01075a..ecd2243c35 100644 --- a/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -722,6 +722,8 @@ protected: NewInstruction = IC->ReplaceInstUsesWith(*CI, With); } bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp, bool isString) const { + if (CI->getArgOperand(SizeCIOp) == CI->getArgOperand(SizeArgOp)) + return true; if (ConstantInt *SizeCI = dyn_cast<ConstantInt>(CI->getArgOperand(SizeCIOp))) { if (SizeCI->isAllOnesValue()) diff --git a/test/Transforms/InstCombine/objsize.ll b/test/Transforms/InstCombine/objsize.ll index 9950e5f4cc..4154ea0afb 100644 --- a/test/Transforms/InstCombine/objsize.ll +++ b/test/Transforms/InstCombine/objsize.ll @@ -176,3 +176,14 @@ define i32 @test9(i32 %x) { ; CHECK-NOT: ret i32 %x ret i32 %objsize } + +define i8* @test10(i32 %x) { +; CHECK: @test10 + %alloc = call noalias i8* @malloc(i32 %x) nounwind + %objsize = call i32 @llvm.objectsize.i32(i8* %alloc, i1 false) nounwind readonly + tail call i8* @__memset_chk(i8* %alloc, i32 0, i32 %x, i32 %objsize) nounwind +; CHECK-NOT: @llvm.objectsize +; CHECK: @llvm.memset + ret i8* %alloc +; CHECK: ret i8* +} |