diff options
Diffstat (limited to 'test/Transforms/SimplifyLibCalls/StrCmp.ll')
| -rw-r--r-- | test/Transforms/SimplifyLibCalls/StrCmp.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/StrCmp.ll b/test/Transforms/SimplifyLibCalls/StrCmp.ll new file mode 100644 index 0000000..7359635 --- /dev/null +++ b/test/Transforms/SimplifyLibCalls/StrCmp.ll @@ -0,0 +1,28 @@ +; Test that the StrCmpOptimizer works correctly +; RUN: opt < %s -simplify-libcalls -S | \ +; RUN: not grep {call.*strcmp} + +@hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1] +@hell = constant [5 x i8] c"hell\00" ; <[5 x i8]*> [#uses=1] +@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] + +declare i32 @strcmp(i8*, i8*) + +declare i32 @puts(i8*) + +define i32 @main() { + %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=5] + %hell_p = getelementptr [5 x i8]* @hell, i32 0, i32 0 ; <i8*> [#uses=1] + %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=4] + %temp1 = call i32 @strcmp( i8* %hello_p, i8* %hello_p ) ; <i32> [#uses=1] + %temp2 = call i32 @strcmp( i8* %null_p, i8* %null_p ) ; <i32> [#uses=1] + %temp3 = call i32 @strcmp( i8* %hello_p, i8* %null_p ) ; <i32> [#uses=1] + %temp4 = call i32 @strcmp( i8* %null_p, i8* %hello_p ) ; <i32> [#uses=1] + %temp5 = call i32 @strcmp( i8* %hell_p, i8* %hello_p ) ; <i32> [#uses=1] + %rslt1 = add i32 %temp1, %temp2 ; <i32> [#uses=1] + %rslt2 = add i32 %rslt1, %temp3 ; <i32> [#uses=1] + %rslt3 = add i32 %rslt2, %temp4 ; <i32> [#uses=1] + %rslt4 = add i32 %rslt3, %temp5 ; <i32> [#uses=1] + ret i32 %rslt4 +} + |