| ; 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 |
| } |
| |