| ; Test that the StrChrOptimizer works correctly |
| ; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \ |
| ; RUN: not grep {call.*@strchr} |
| |
| ; This transformation requires the pointer size, as it assumes that size_t is |
| ; the size of a pointer. |
| target datalayout = "-p:64:64:64" |
| |
| @hello = constant [14 x i8] c"hello world\5Cn\00" ; <[14 x i8]*> [#uses=1] |
| @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] |
| |
| declare i8* @strchr(i8*, i32) |
| |
| declare i32 @puts(i8*) |
| |
| define i32 @main() { |
| %hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=2] |
| %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] |
| %world = call i8* @strchr( i8* %hello_p, i32 119 ) ; <i8*> [#uses=1] |
| %ignore = call i8* @strchr( i8* %null_p, i32 119 ) ; <i8*> [#uses=0] |
| %len = call i32 @puts( i8* %world ) ; <i32> [#uses=1] |
| %index = add i32 %len, 112 ; <i32> [#uses=2] |
| %result = call i8* @strchr( i8* %hello_p, i32 %index ) ; <i8*> [#uses=0] |
| ret i32 %index |
| } |
| |
