1 ; Test that the StrCatOptimizer works correctly 2 ; RUN: opt < %s -simplify-libcalls -S | \ 3 ; RUN: not grep {call.*strlen} 4 5 target datalayout = "e-p:32:32" 6 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=3] 7 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=3] 8 @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1] 9 10 declare i32 @strlen(i8*) 11 12 define i32 @test1() { 13 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 14 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 15 ret i32 %hello_l 16 } 17 18 define i32 @test2() { 19 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 20 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 21 ret i32 %null_l 22 } 23 24 define i32 @test3() { 25 %null_hello_p = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1] 26 %null_hello_l = call i32 @strlen( i8* %null_hello_p ) ; <i32> [#uses=1] 27 ret i32 %null_hello_l 28 } 29 30 define i1 @test4() { 31 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 32 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 33 %eq_hello = icmp eq i32 %hello_l, 0 ; <i1> [#uses=1] 34 ret i1 %eq_hello 35 } 36 37 define i1 @test5() { 38 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 39 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 40 %eq_null = icmp eq i32 %null_l, 0 ; <i1> [#uses=1] 41 ret i1 %eq_null 42 } 43 44 define i1 @test6() { 45 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 46 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 47 %ne_hello = icmp ne i32 %hello_l, 0 ; <i1> [#uses=1] 48 ret i1 %ne_hello 49 } 50 51 define i1 @test7() { 52 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 53 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 54 %ne_null = icmp ne i32 %null_l, 0 ; <i1> [#uses=1] 55 ret i1 %ne_null 56 } 57
