| ; Test that the StrCatOptimizer works correctly |
| ; RUN: opt < %s -simplify-libcalls -S | \ |
| ; RUN: not grep {call.*strlen} |
| |
| target datalayout = "e-p:32:32" |
| @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=3] |
| @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=3] |
| @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1] |
| |
| declare i32 @strlen(i8*) |
| |
| define i32 @test1() { |
| %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] |
| %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] |
| ret i32 %hello_l |
| } |
| |
| define i32 @test2() { |
| %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] |
| %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] |
| ret i32 %null_l |
| } |
| |
| define i32 @test3() { |
| %null_hello_p = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1] |
| %null_hello_l = call i32 @strlen( i8* %null_hello_p ) ; <i32> [#uses=1] |
| ret i32 %null_hello_l |
| } |
| |
| define i1 @test4() { |
| %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] |
| %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] |
| %eq_hello = icmp eq i32 %hello_l, 0 ; <i1> [#uses=1] |
| ret i1 %eq_hello |
| } |
| |
| define i1 @test5() { |
| %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] |
| %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] |
| %eq_null = icmp eq i32 %null_l, 0 ; <i1> [#uses=1] |
| ret i1 %eq_null |
| } |
| |
| define i1 @test6() { |
| %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] |
| %hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1] |
| %ne_hello = icmp ne i32 %hello_l, 0 ; <i1> [#uses=1] |
| ret i1 %ne_hello |
| } |
| |
| define i1 @test7() { |
| %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] |
| %null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1] |
| %ne_null = icmp ne i32 %null_l, 0 ; <i1> [#uses=1] |
| ret i1 %ne_null |
| } |