diff options
Diffstat (limited to 'test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll')
| -rw-r--r-- | test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll b/test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll new file mode 100644 index 000000000000..b433297bba6f --- /dev/null +++ b/test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll @@ -0,0 +1,15 @@ +; Test to make sure malloc's bitcast does not block detection of a store +; to aliased memory; GVN should not optimize away the load in this program. +; RUN: opt < %s -gvn -S | FileCheck %s + +define i64 @test() { + %1 = tail call i8* @malloc(i64 mul (i64 4, i64 ptrtoint (i64* getelementptr (i64* null, i64 1) to i64))) ; <i8*> [#uses=2] + store i8 42, i8* %1 + %X = bitcast i8* %1 to i64* ; <i64*> [#uses=1] + %Y = load i64* %X ; <i64> [#uses=1] + ret i64 %Y +; CHECK: %Y = load i64* %X +; CHECK: ret i64 %Y +} + +declare noalias i8* @malloc(i64) |