diff options
| author | Chris Lattner <sabre@nondot.org> | 2006-01-13 22:01:47 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-01-13 22:01:47 +0000 |
| commit | e5445dc6a2a9a9aa14d65a370c849292d7b48331 (patch) | |
| tree | e9adb5d4ae6c502464ed85cb6462dd1f2f31915e /test/Transforms/InstCombine/stacksaverestore.ll | |
| parent | b8414333ac1e55f0a65f7e8589ef1d4ed2fde85a (diff) | |
| download | llvm-e5445dc6a2a9a9aa14d65a370c849292d7b48331.tar.gz llvm-e5445dc6a2a9a9aa14d65a370c849292d7b48331.tar.bz2 llvm-e5445dc6a2a9a9aa14d65a370c849292d7b48331.tar.xz | |
new testcases for the stackrestore instcombine optimizations
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25297 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/stacksaverestore.ll')
| -rw-r--r-- | test/Transforms/InstCombine/stacksaverestore.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/stacksaverestore.ll b/test/Transforms/InstCombine/stacksaverestore.ll new file mode 100644 index 0000000000..c41a1b1e7f --- /dev/null +++ b/test/Transforms/InstCombine/stacksaverestore.ll @@ -0,0 +1,20 @@ +; RUN: llvm-as < %s | opt -instcombine -disable-output && +; RUN: llvm-as < %s | 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*) |