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 @nullstring = constant i8 0 10 11 declare i32 @strlen(i8*) 12 13 define i32 @test1() { 14 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 15 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 16 ret i32 %hello_l 17 } 18 19 define i32 @test2() { 20 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 21 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 22 ret i32 %null_l 23 } 24 25 define i32 @test3() { 26 %null_hello_p = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1] 27 %null_hello_l = call i32 @strlen( i8* %null_hello_p ) ; <i32> [#uses=1] 28 ret i32 %null_hello_l 29 } 30 31 define i1 @test4() { 32 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 33 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 34 %eq_hello = icmp eq i32 %hello_l, 0 ; <i1> [#uses=1] 35 ret i1 %eq_hello 36 } 37 38 define i1 @test5() { 39 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 40 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 41 %eq_null = icmp eq i32 %null_l, 0 ; <i1> [#uses=1] 42 ret i1 %eq_null 43 } 44 45 define i1 @test6() { 46 %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 47 %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] 48 %ne_hello = icmp ne i32 %hello_l, 0 ; <i1> [#uses=1] 49 ret i1 %ne_hello 50 } 51 52 define i1 @test7() { 53 %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 54 %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] 55 %ne_null = icmp ne i32 %null_l, 0 ; <i1> [#uses=1] 56 ret i1 %ne_null 57 } 58 59 define i32 @test8() { 60 %len = tail call i32 @strlen(i8* @nullstring) nounwind 61 ret i32 %len 62 } 63
