1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -passes=instcombine -S | FileCheck %s
3
4define i32 @test([1024 x i8]* %target) {
5; CHECK-LABEL: @test(
6; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr [1024 x i8], [1024 x i8]* [[TARGET:%.*]], i64 0, i64 0
7; CHECK-NEXT:    store i8 1, i8* [[TMP1]], align 1
8; CHECK-NEXT:    [[TMP2:%.*]] = bitcast [1024 x i8]* [[TARGET]] to i16*
9; CHECK-NEXT:    store i16 257, i16* [[TMP2]], align 2
10; CHECK-NEXT:    [[TMP3:%.*]] = bitcast [1024 x i8]* [[TARGET]] to i32*
11; CHECK-NEXT:    store i32 16843009, i32* [[TMP3]], align 4
12; CHECK-NEXT:    [[TMP4:%.*]] = bitcast [1024 x i8]* [[TARGET]] to i64*
13; CHECK-NEXT:    store i64 72340172838076673, i64* [[TMP4]], align 8
14; CHECK-NEXT:    ret i32 0
15;
16  %target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0
17  call void @llvm.memset.p0i8.i32(i8* %target_p, i8 1, i32 0, i1 false)
18  call void @llvm.memset.p0i8.i32(i8* %target_p, i8 1, i32 1, i1 false)
19  call void @llvm.memset.p0i8.i32(i8* align 2 %target_p, i8 1, i32 2, i1 false)
20  call void @llvm.memset.p0i8.i32(i8* align 4 %target_p, i8 1, i32 4, i1 false)
21  call void @llvm.memset.p0i8.i32(i8* align 8 %target_p, i8 1, i32 8, i1 false)
22  ret i32 0
23}
24
25@Unknown = external constant i128
26
27define void @memset_to_constant() {
28; CHECK-LABEL: @memset_to_constant(
29; CHECK-NEXT:    ret void
30;
31  %p = bitcast i128* @Unknown to i8*
32  call void @llvm.memset.p0i8.i32(i8* %p, i8 0, i32 16, i1 false)
33  ret void
34}
35
36; FIXME: This is technically incorrect because it might overwrite a poison
37; value. Stop folding it once #52930 is resolved.
38define void @memset_undef(i8* %p) {
39; CHECK-LABEL: @memset_undef(
40; CHECK-NEXT:    ret void
41;
42  call void @llvm.memset.p0i8.i32(i8* %p, i8 undef, i32 8, i1 false)
43  ret void
44}
45
46define void @memset_undef_volatile(i8* %p) {
47; CHECK-LABEL: @memset_undef_volatile(
48; CHECK-NEXT:    call void @llvm.memset.p0i8.i32(i8* [[P:%.*]], i8 undef, i32 8, i1 true)
49; CHECK-NEXT:    ret void
50;
51  call void @llvm.memset.p0i8.i32(i8* %p, i8 undef, i32 8, i1 true)
52  ret void
53}
54
55define void @memset_poison(i8* %p) {
56; CHECK-LABEL: @memset_poison(
57; CHECK-NEXT:    ret void
58;
59  call void @llvm.memset.p0i8.i32(i8* %p, i8 poison, i32 8, i1 false)
60  ret void
61}
62
63define void @memset_poison_volatile(i8* %p) {
64; CHECK-LABEL: @memset_poison_volatile(
65; CHECK-NEXT:    call void @llvm.memset.p0i8.i32(i8* [[P:%.*]], i8 poison, i32 8, i1 true)
66; CHECK-NEXT:    ret void
67;
68  call void @llvm.memset.p0i8.i32(i8* %p, i8 poison, i32 8, i1 true)
69  ret void
70}
71
72declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) argmemonly nounwind
73