1 ; Test that the StrNCpyOptimizer works correctly
2 ; RUN: opt < %s -simplify-libcalls -S | \
3 ; RUN: not grep {call.*strncpy}
5 ; This transformation requires the pointer size, as it assumes that size_t is
6 ; the size of a pointer.
7 target datalayout = "-p:64:64:64"
9 @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1]
10 @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
11 @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1]
13 declare i8* @strncpy(i8*, i8*, i32)
15 declare i32 @puts(i8*)
18 %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1]
19 %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=2]
21 %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
22 %rslt1 = call i8* @strncpy( i8* %arg1, i8* %arg2, i32 6 ) ; <i8*> [#uses=1]
23 %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
24 %rslt2 = call i8* @strncpy( i8* %rslt1, i8* %arg3, i32 42 ) ; <i8*> [#uses=1]
25 %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1]
26 %rslt3 = call i8* @strncpy( i8* %rslt2, i8* %arg4, i32 42 ) ; <i8*> [#uses=1]
27 call i32 @puts( i8* %rslt3 ) ; <i32>:1 [#uses=0]