1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -instsimplify < %s | FileCheck %s
3
4define <4 x i32> @test1(<4 x i32> %A) {
5; CHECK-LABEL: @test1(
6; CHECK-NEXT:    ret <4 x i32> undef
7;
8  %I = insertelement <4 x i32> %A, i32 5, i64 4294967296
9  ret <4 x i32> %I
10}
11
12define <4 x i32> @test2(<4 x i32> %A) {
13; CHECK-LABEL: @test2(
14; CHECK-NEXT:    ret <4 x i32> undef
15;
16  %I = insertelement <4 x i32> %A, i32 5, i64 4
17  ret <4 x i32> %I
18}
19
20define <4 x i32> @test3(<4 x i32> %A) {
21; CHECK-LABEL: @test3(
22; CHECK-NEXT:    [[I:%.*]] = insertelement <4 x i32> [[A:%.*]], i32 5, i64 1
23; CHECK-NEXT:    ret <4 x i32> [[I]]
24;
25  %I = insertelement <4 x i32> %A, i32 5, i64 1
26  ret <4 x i32> %I
27}
28
29define <4 x i32> @test4(<4 x i32> %A) {
30; CHECK-LABEL: @test4(
31; CHECK-NEXT:    ret <4 x i32> undef
32;
33  %I = insertelement <4 x i32> %A, i32 5, i128 100
34  ret <4 x i32> %I
35}
36
37define <4 x i32> @test5(<4 x i32> %A) {
38; CHECK-LABEL: @test5(
39; CHECK-NEXT:    ret <4 x i32> undef
40;
41  %I = insertelement <4 x i32> %A, i32 5, i64 undef
42  ret <4 x i32> %I
43}
44
45define <4 x i32> @test5_poison(<4 x i32> %A) {
46; CHECK-LABEL: @test5_poison(
47; CHECK-NEXT:    ret <4 x i32> undef
48;
49  %I = insertelement <4 x i32> %A, i32 5, i64 poison
50  ret <4 x i32> %I
51}
52
53define <4 x i32> @elem_poison(<4 x i32> %A) {
54; CHECK-LABEL: @elem_poison(
55; CHECK-NEXT:    [[B:%.*]] = insertelement <4 x i32> [[A:%.*]], i32 poison, i32 1
56; CHECK-NEXT:    ret <4 x i32> [[B]]
57;
58  %B = insertelement <4 x i32> %A, i32 poison, i32 1
59  ret <4 x i32> %B
60}
61
62; The undef may be replacing a poison value, so it is not safe to just return 'A'.
63
64define <4 x i32> @PR1286(<4 x i32> %A) {
65; CHECK-LABEL: @PR1286(
66; CHECK-NEXT:    [[B:%.*]] = insertelement <4 x i32> [[A:%.*]], i32 undef, i32 1
67; CHECK-NEXT:    ret <4 x i32> [[B]]
68;
69  %B = insertelement <4 x i32> %A, i32 undef, i32 1
70  ret <4 x i32> %B
71}
72
73; Constant is not poison, so this can simplify.
74
75define <2 x i32> @undef_into_constant_vector_with_variable_index(<2 x i32> %A, i32 %Index) {
76; CHECK-LABEL: @undef_into_constant_vector_with_variable_index(
77; CHECK-NEXT:    ret <2 x i32> <i32 42, i32 -42>
78;
79  %B = insertelement <2 x i32> <i32 42, i32 -42>, i32 undef, i32 %Index
80  ret <2 x i32> %B
81}
82
83define <8 x i8> @extract_insert_same_vec_and_index(<8 x i8> %in) {
84; CHECK-LABEL: @extract_insert_same_vec_and_index(
85; CHECK-NEXT:    ret <8 x i8> [[IN:%.*]]
86;
87  %val = extractelement <8 x i8> %in, i32 5
88  %vec = insertelement <8 x i8> %in, i8 %val, i32 5
89  ret <8 x i8> %vec
90}
91
92define <8 x i8> @extract_insert_same_vec_and_index2(<8 x i8> %in, i32 %index) {
93; CHECK-LABEL: @extract_insert_same_vec_and_index2(
94; CHECK-NEXT:    ret <8 x i8> [[IN:%.*]]
95;
96  %val = extractelement <8 x i8> %in, i32 %index
97  %vec = insertelement <8 x i8> %in, i8 %val, i32 %index
98  ret <8 x i8> %vec
99}
100
101; The insert is in an unreachable block, so it is allowed to point to itself.
102; This would crash via stack overflow.
103
104define void @PR43218() {
105; CHECK-LABEL: @PR43218(
106; CHECK-NEXT:  end:
107; CHECK-NEXT:    ret void
108; CHECK:       unreachable_infloop:
109; CHECK-NEXT:    [[EXTRACT:%.*]] = extractelement <2 x i64> [[BOGUS:%.*]], i32 0
110; CHECK-NEXT:    [[T0:%.*]] = inttoptr i64 [[EXTRACT]] to i16****
111; CHECK-NEXT:    [[BOGUS]] = insertelement <2 x i64> [[BOGUS]], i64 undef, i32 1
112; CHECK-NEXT:    br label [[UNREACHABLE_INFLOOP:%.*]]
113;
114end:
115  ret void
116
117unreachable_infloop:
118  %extract = extractelement <2 x i64> %bogus, i32 0
119  %t0 = inttoptr i64 %extract to i16****
120  %bogus = insertelement <2 x i64> %bogus, i64 undef, i32 1
121  br label %unreachable_infloop
122}
123