1 ; Test that the strcat libcall simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
7 @hello = constant [6 x i8] c"hello\00"
8 @empty = constant [1 x i8] c"\00"
9 @a = common global [32 x i8] zeroinitializer, align 1
11 declare i8* @strcat(i8*, i8*)
13 define void @test_simplify1() {
14 ; CHECK-LABEL: @test_simplify1(
15 ; CHECK-NOT: call i8* @strcat
18 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
19 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
20 call i8* @strcat(i8* %dst, i8* %src)
24 define void @test_simplify2() {
25 ; CHECK-LABEL: @test_simplify2(
26 ; CHECK-NEXT: ret void
28 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
29 %src = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
30 call i8* @strcat(i8* %dst, i8* %src)