1 ; Test that the StrCatOptimizer works correctly 2 ; PR3661 3 ; RUN: opt < %s -simplify-libcalls -S | \ 4 ; RUN: not grep {call.*strcat} 5 ; RUN: opt < %s -simplify-libcalls -S | \ 6 ; RUN: grep {puts.*%arg1} 7 8 ; This transformation requires the pointer size, as it assumes that size_t is 9 ; the size of a pointer. 10 target datalayout = "-p:64:64:64" 11 12 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1] 13 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] 14 @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1] 15 16 declare i8* @strcat(i8*, i8*) 17 18 declare i32 @puts(i8*) 19 20 define i32 @main() { 21 %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1] 22 %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=2] 23 store i8 0, i8* %arg1 24 %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] 25 %rslt1 = call i8* @strcat( i8* %arg1, i8* %arg2 ) ; <i8*> [#uses=1] 26 %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] 27 %rslt2 = call i8* @strcat( i8* %rslt1, i8* %arg3 ) ; <i8*> [#uses=1] 28 %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1] 29 %rslt3 = call i8* @strcat( i8* %rslt2, i8* %arg4 ) ; <i8*> [#uses=1] 30 call i32 @puts( i8* %rslt3 ) ; <i32>:1 [#uses=0] 31 ret i32 0 32 } 33 34
