1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the strcpy library call simplifier works correctly.
4 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 ; This transformation requires the pointer size, as it assumes that size_t is
7 ; the size of a pointer.
8 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"
10 @hello = constant [6 x i8] c"hello\00"
11 @a = common global [32 x i8] zeroinitializer, align 1
12 @b = common global [32 x i8] zeroinitializer, align 1
14 declare i8* @strcpy(i8*, i8*)
16 define void @test_simplify1() {
17 ; CHECK-LABEL: @test_simplify1(
18 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
19 ; CHECK-NEXT: ret void
22 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
23 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
25 call i8* @strcpy(i8* %dst, i8* %src)
29 define i8* @test_simplify2() {
30 ; CHECK-LABEL: @test_simplify2(
31 ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0)
34 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
36 %ret = call i8* @strcpy(i8* %dst, i8* %dst)
41 define void @test_simplify3(i8* %dst) {
42 ; CHECK-LABEL: @test_simplify3(
43 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(80) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
44 ; CHECK-NEXT: ret void
47 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
49 call i8* @strcpy(i8* dereferenceable(80) %dst, i8* %src)
53 define i8* @test_no_simplify1() {
54 ; CHECK-LABEL: @test_no_simplify1(
55 ; CHECK-NEXT: [[RET:%.*]] = call i8* @strcpy(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @b, i32 0, i32 0))
56 ; CHECK-NEXT: ret i8* [[RET]]
59 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
60 %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0
62 %ret = call i8* @strcpy(i8* %dst, i8* %src)
66 define void @test_no_incompatible_attr() {
67 ; CHECK-LABEL: @test_no_incompatible_attr(
68 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
69 ; CHECK-NEXT: ret void
72 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
73 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
75 call dereferenceable(1) i8* @strcpy(i8* %dst, i8* %src)