diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/stacksaverestore.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/stacksaverestore.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/stacksaverestore.ll b/llvm/test/Transforms/InstCombine/stacksaverestore.ll new file mode 100644 index 00000000000..d9633b5c3be --- /dev/null +++ b/llvm/test/Transforms/InstCombine/stacksaverestore.ll @@ -0,0 +1,20 @@ +; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine -disable-output && +; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep call + +;; Test that llvm.stackrestore is removed when possible. + +int* %test1(uint %P) { + %tmp = call sbyte* %llvm.stacksave() + call void %llvm.stackrestore(sbyte* %tmp) ;; not restoring anything + %A = alloca int, uint %P + ret int* %A +} + +void %test2(sbyte* %X) { + call void %llvm.stackrestore(sbyte* %X) ;; no allocas before return. + ret void +} + +declare sbyte* %llvm.stacksave() + +declare void %llvm.stackrestore(sbyte*) |
