1 ; Test that the StrNCmpOptimizer works correctly
2 ; RUN: opt < %s -simplify-libcalls -S | \
3 ; RUN: not grep {call.*strncmp}
5 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1]
6 @hell = constant [5 x i8] c"hell\00" ; <[5 x i8]*> [#uses=1]
7 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
9 declare i32 @strncmp(i8*, i8*, i32)
11 declare i32 @puts(i8*)
14 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=5]
15 %hell_p = getelementptr [5 x i8]* @hell, i32 0, i32 0 ; <i8*> [#uses=1]
16 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=4]
17 %temp1 = call i32 @strncmp( i8* %hello_p, i8* %hello_p, i32 5 ) ; <i32> [#uses=1]
18 %temp2 = call i32 @strncmp( i8* %null_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1]
19 %temp3 = call i32 @strncmp( i8* %hello_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1]
20 %temp4 = call i32 @strncmp( i8* %null_p, i8* %hello_p, i32 0 ) ; <i32> [#uses=1]
21 %temp5 = call i32 @strncmp( i8* %hell_p, i8* %hello_p, i32 4 ) ; <i32> [#uses=1]
22 %rslt1 = add i32 %temp1, %temp2 ; <i32> [#uses=1]
23 %rslt2 = add i32 %rslt1, %temp3 ; <i32> [#uses=1]
24 %rslt3 = add i32 %rslt2, %temp4 ; <i32> [#uses=1]
25 %rslt4 = add i32 %rslt3, %temp5 ; <i32> [#uses=1]