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; Test that the StrCmpOptimizer works correctly
; RUN: opt %s -simplify-libcalls | llvm-dis | \
; 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
}
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