1; RUN: opt < %s -basicaa -dse -S | FileCheck %s
2target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
3
4; Ensure that the dead store is deleted in this case.  It is wholely
5; overwritten by the second store.
6define void @test1(i32 *%V) {
7        %V2 = bitcast i32* %V to i8*            ; <i8*> [#uses=1]
8        store i8 0, i8* %V2
9        store i32 1234567, i32* %V
10        ret void
11; CHECK-LABEL: @test1(
12; CHECK-NEXT: store i32 1234567
13}
14
15; Note that we could do better by merging the two stores into one.
16define void @test2(i32* %P) {
17; CHECK-LABEL: @test2(
18  store i32 0, i32* %P
19; CHECK: store i32
20  %Q = bitcast i32* %P to i16*
21  store i16 1, i16* %Q
22; CHECK: store i16
23  ret void
24}
25
26
27define i32 @test3(double %__x) {
28; CHECK-LABEL: @test3(
29; CHECK: store double
30  %__u = alloca { [3 x i32] }
31  %tmp.1 = bitcast { [3 x i32] }* %__u to double*
32  store double %__x, double* %tmp.1
33  %tmp.4 = getelementptr { [3 x i32] }* %__u, i32 0, i32 0, i32 1
34  %tmp.5 = load i32* %tmp.4
35  %tmp.6 = icmp slt i32 %tmp.5, 0
36  %tmp.7 = zext i1 %tmp.6 to i32
37  ret i32 %tmp.7
38}
39
40; PR6043
41define void @test4(i8* %P) {
42; CHECK-LABEL: @test4(
43; CHECK-NEXT: bitcast
44; CHECK-NEXT: store double
45
46  store i8 19, i8* %P  ;; dead
47  %A = getelementptr i8* %P, i32 3
48
49  store i8 42, i8* %A  ;; dead
50
51  %Q = bitcast i8* %P to double*
52  store double 0.0, double* %Q
53  ret void
54}
55
56; PR8657
57declare void @test5a(i32*)
58define void @test5(i32 %i) nounwind ssp {
59  %A = alloca i32
60  %B = bitcast i32* %A to i8*
61  %C = getelementptr i8* %B, i32 %i
62  store i8 10, i8* %C        ;; Dead store to variable index.
63  store i32 20, i32* %A
64
65  call void @test5a(i32* %A)
66  ret void
67; CHECK-LABEL: @test5(
68; CHECK-NEXT: alloca
69; CHECK-NEXT: store i32 20
70; CHECK-NEXT: call void @test5a
71}
72
73declare void @test5a_as1(i32*)
74define void @test5_addrspacecast(i32 %i) nounwind ssp {
75  %A = alloca i32
76  %B = addrspacecast i32* %A to i8 addrspace(1)*
77  %C = getelementptr i8 addrspace(1)* %B, i32 %i
78  store i8 10, i8 addrspace(1)* %C        ;; Dead store to variable index.
79  store i32 20, i32* %A
80
81  call void @test5a(i32* %A)
82  ret void
83; CHECK-LABEL: @test5_addrspacecast(
84; CHECK-NEXT: alloca
85; CHECK-NEXT: store i32 20
86; CHECK-NEXT: call void @test5a
87}
88