1 ; Test that the strcpy library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
5 ; This transformation requires the pointer size, as it assumes that size_t is
6 ; the size of a pointer.
7 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-n8:16:32"
9 @hello = constant [6 x i8] c"hello\00"
10 @a = common global [32 x i8] zeroinitializer, align 1
11 @b = common global [32 x i8] zeroinitializer, align 1
13 declare i8* @strcpy(i8*, i8*)
15 define void @test_simplify1() {
16 ; CHECK-LABEL: @test_simplify1(
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
21 call i8* @strcpy(i8* %dst, i8* %src)
22 ; CHECK: @llvm.memcpy.p0i8.p0i8.i32
26 define i8* @test_simplify2() {
27 ; CHECK-LABEL: @test_simplify2(
29 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
31 %ret = call i8* @strcpy(i8* %dst, i8* %dst)
32 ; CHECK: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0)
36 define i8* @test_no_simplify1() {
37 ; CHECK-LABEL: @test_no_simplify1(
39 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
40 %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0
42 %ret = call i8* @strcpy(i8* %dst, i8* %src)
43 ; CHECK: call i8* @strcpy