1; RUN: opt < %s -basicaa -dse -S | FileCheck %s
2
3declare noalias i8* @calloc(i64, i64)
4
5define i32* @test1() {
6; CHECK-LABEL: test1
7  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
8  %2 = bitcast i8* %1 to i32*
9  ; This store is dead and should be removed
10  store i32 0, i32* %2, align 4
11; CHECK-NOT: store i32 0, i32* %2, align 4
12  ret i32* %2
13}
14
15define i32* @test2() {
16; CHECK-LABEL: test2
17  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
18  %2 = bitcast i8* %1 to i32*
19  %3 = getelementptr i32, i32* %2, i32 5
20  store i32 0, i32* %3, align 4
21; CHECK-NOT: store i32 0, i32* %2, align 4
22  ret i32* %2
23}
24
25define i32* @test3(i32 *%arg) {
26; CHECK-LABEL: test3
27  store i32 0, i32* %arg, align 4
28; CHECK: store i32 0, i32* %arg, align 4
29  ret i32* %arg
30}
31
32declare void @clobber_memory(i8*)
33define i8* @test4() {
34; CHECK-LABEL: test4
35  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
36  call void @clobber_memory(i8* %1)
37  store i8 0, i8* %1, align 4
38; CHECK: store i8 0, i8* %1, align 4
39  ret i8* %1
40}
41
42define i32* @test5() {
43; CHECK-LABEL: test5
44  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
45  %2 = bitcast i8* %1 to i32*
46  store volatile i32 0, i32* %2, align 4
47; CHECK: store volatile i32 0, i32* %2, align 4
48  ret i32* %2
49}
50
51define i8* @test6() {
52; CHECK-LABEL: test6
53  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
54  store i8 5, i8* %1, align 4
55; CHECK: store i8 5, i8* %1, align 4
56  ret i8* %1
57}
58
59define i8* @test7(i8 %arg) {
60; CHECK-LABEL: test7
61  %1 = tail call noalias i8* @calloc(i64 1, i64 4)
62  store i8 %arg, i8* %1, align 4
63; CHECK: store i8 %arg, i8* %1, align 4
64  ret i8* %1
65}
66