1 ; Test that the StrCatOptimizer works correctly
3 ; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
4 ; RUN: not grep {call.*strcat}
5 ; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
6 ; RUN: grep {puts.*%arg1}
8 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1]
9 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
10 @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1]
12 declare i8* @strcat(i8*, i8*)
14 declare i32 @puts(i8*)
17 %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1]
18 %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=2]
20 %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
21 %rslt1 = call i8* @strcat( i8* %arg1, i8* %arg2 ) ; <i8*> [#uses=1]
22 %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
23 %rslt2 = call i8* @strcat( i8* %rslt1, i8* %arg3 ) ; <i8*> [#uses=1]
24 %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1]
25 %rslt3 = call i8* @strcat( i8* %rslt2, i8* %arg4 ) ; <i8*> [#uses=1]
26 call i32 @puts( i8* %rslt3 ) ; <i32>:1 [#uses=0]