1 ; Test that the StrNCmpOptimizer works correctly
2 ; RUN: opt < %s -simplify-libcalls -S | \
3 ; RUN: not grep {call.*strncmp}
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
6 target triple = "i386-apple-darwin9.0"
8 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1]
9 @hell = constant [5 x i8] c"hell\00" ; <[5 x i8]*> [#uses=1]
10 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
12 declare i32 @strncmp(i8*, i8*, i32)
14 declare i32 @puts(i8*)
17 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=5]
18 %hell_p = getelementptr [5 x i8]* @hell, i32 0, i32 0 ; <i8*> [#uses=1]
19 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=4]
20 %temp1 = call i32 @strncmp( i8* %hello_p, i8* %hello_p, i32 5 ) ; <i32> [#uses=1]
21 %temp2 = call i32 @strncmp( i8* %null_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1]
22 %temp3 = call i32 @strncmp( i8* %hello_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1]
23 %temp4 = call i32 @strncmp( i8* %null_p, i8* %hello_p, i32 0 ) ; <i32> [#uses=1]
24 %temp5 = call i32 @strncmp( i8* %hell_p, i8* %hello_p, i32 4 ) ; <i32> [#uses=1]
25 %rslt1 = add i32 %temp1, %temp2 ; <i32> [#uses=1]
26 %rslt2 = add i32 %rslt1, %temp3 ; <i32> [#uses=1]
27 %rslt3 = add i32 %rslt2, %temp4 ; <i32> [#uses=1]
28 %rslt4 = add i32 %rslt3, %temp5 ; <i32> [#uses=1]
32 define i32 @test1(i8* %P, i8* %Q) {
33 %cmp = call i32 @strncmp(i8* %P, i8* %Q, i32 1)