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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2010-09-29 21:50:51 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2010-09-29 21:50:51 +0000 |
| commit | 06f25cfb334d6630fc5018260a78129f4b956bad (patch) | |
| tree | 66fb1b4e452c842a40977cd62fab39144d73147c /test/Transforms/SimplifyLibCalls | |
| parent | 1a30123b609d48ac50f9a9e088e55683df70cfc3 (diff) | |
| download | llvm-06f25cfb334d6630fc5018260a78129f4b956bad.tar.gz llvm-06f25cfb334d6630fc5018260a78129f4b956bad.tar.bz2 llvm-06f25cfb334d6630fc5018260a78129f4b956bad.tar.xz | |
Teach SimplifyLibCalls how to optimize strrchr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115091 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyLibCalls')
| -rw-r--r-- | test/Transforms/SimplifyLibCalls/StrRChr.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/StrRChr.ll b/test/Transforms/SimplifyLibCalls/StrRChr.ll new file mode 100644 index 0000000000..2259fc0289 --- /dev/null +++ b/test/Transforms/SimplifyLibCalls/StrRChr.ll @@ -0,0 +1,23 @@ +; Test that the StrRChrOptimizer works correctly +; RUN: opt < %s -simplify-libcalls -S | FileCheck %s + +target datalayout = "-p:64:64:64" + +@hello = constant [14 x i8] c"hello world\5Cn\00" +@null = constant [1 x i8] zeroinitializer + +declare i8* @strrchr(i8*, i32) + +define void @foo(i8* %bar) { + %hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0 + %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 + %world = call i8* @strrchr(i8* %hello_p, i32 119) +; CHECK: getelementptr i8* %hello_p, i64 6 + %ignore = call i8* @strrchr(i8* %null_p, i32 119) +; CHECK-NOT: call i8* strrchr + %null = call i8* @strrchr(i8* %hello_p, i32 0) +; CHECK: getelementptr i8* %hello_p, i64 13 + %strchr = call i8* @strrchr(i8* %bar, i32 0) +; CHECK: call i8* @strchr(i8* %bar, i32 0) + ret void +} |