1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define i32* @test1a(i32* %p, i32* %q) {
; CHECK-LABEL: @test1a(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32* [[P:%.*]], [[Q:%.*]]
; CHECK-NEXT: [[SELECT_V:%.*]] = select i1 [[CMP]], i32* [[P]], i32* [[Q]]
; CHECK-NEXT: [[SELECT:%.*]] = getelementptr i32, i32* [[SELECT_V]], i64 4
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr i32, i32* %p, i64 4
%gep2 = getelementptr i32, i32* %q, i64 4
%cmp = icmp ugt i32* %p, %q
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test1b(i32* %p, i32* %q) {
; CHECK-LABEL: @test1b(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32* [[P:%.*]], [[Q:%.*]]
; CHECK-NEXT: [[SELECT_V:%.*]] = select i1 [[CMP]], i32* [[P]], i32* [[Q]]
; CHECK-NEXT: [[SELECT:%.*]] = getelementptr i32, i32* [[SELECT_V]], i64 4
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds i32, i32* %p, i64 4
%gep2 = getelementptr i32, i32* %q, i64 4
%cmp = icmp ugt i32* %p, %q
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test1c(i32* %p, i32* %q) {
; CHECK-LABEL: @test1c(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32* [[P:%.*]], [[Q:%.*]]
; CHECK-NEXT: [[SELECT_V:%.*]] = select i1 [[CMP]], i32* [[P]], i32* [[Q]]
; CHECK-NEXT: [[SELECT:%.*]] = getelementptr i32, i32* [[SELECT_V]], i64 4
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr i32, i32* %p, i64 4
%gep2 = getelementptr inbounds i32, i32* %q, i64 4
%cmp = icmp ugt i32* %p, %q
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test1d(i32* %p, i32* %q) {
; CHECK-LABEL: @test1d(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32* [[P:%.*]], [[Q:%.*]]
; CHECK-NEXT: [[SELECT_V:%.*]] = select i1 [[CMP]], i32* [[P]], i32* [[Q]]
; CHECK-NEXT: [[SELECT:%.*]] = getelementptr inbounds i32, i32* [[SELECT_V]], i64 4
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds i32, i32* %p, i64 4
%gep2 = getelementptr inbounds i32, i32* %q, i64 4
%cmp = icmp ugt i32* %p, %q
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test2(i32* %p, i64 %x, i64 %y) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SELECT_V:%.*]] = select i1 [[CMP]], i64 [[X]], i64 [[Y]]
; CHECK-NEXT: [[SELECT:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 [[SELECT_V]]
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds i32, i32* %p, i64 %x
%gep2 = getelementptr inbounds i32, i32* %p, i64 %y
%cmp = icmp ugt i64 %x, %y
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
; Three (or more) operand GEPs are currently expected to not be optimised,
; though they could be in principle.
define i32* @test3a([4 x i32]* %p, i64 %x, i64 %y) {
; CHECK-LABEL: @test3a(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[P:%.*]], i64 2, i64 [[X:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[P]], i64 2, i64 [[Y:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[X]], [[Y]]
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], i32* [[GEP1]], i32* [[GEP2]]
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds [4 x i32], [4 x i32]* %p, i64 2, i64 %x
%gep2 = getelementptr inbounds [4 x i32], [4 x i32]* %p, i64 2, i64 %y
%cmp = icmp ugt i64 %x, %y
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test3b([4 x i32]* %p, i32* %q, i64 %x, i64 %y) {
; CHECK-LABEL: @test3b(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[P:%.*]], i64 [[X:%.*]], i64 2
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i32, i32* [[Q:%.*]], i64 [[X]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[X]], [[Y:%.*]]
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], i32* [[GEP1]], i32* [[GEP2]]
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds [4 x i32], [4 x i32]* %p, i64 %x, i64 2
%gep2 = getelementptr inbounds i32, i32* %q, i64 %x
%cmp = icmp ugt i64 %x, %y
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
define i32* @test3c(i32* %p, [4 x i32]* %q, i64 %x, i64 %y) {
; CHECK-LABEL: @test3c(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 [[X:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[Q:%.*]], i64 [[X]], i64 2
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[X]], [[Y:%.*]]
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], i32* [[GEP1]], i32* [[GEP2]]
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds i32, i32* %p, i64 %x
%gep2 = getelementptr inbounds [4 x i32], [4 x i32]* %q, i64 %x, i64 2
%cmp = icmp ugt i64 %x, %y
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
; Shouldn't be optimised as it would mean introducing an extra select
define i32* @test4(i32* %p, i32* %q, i64 %x, i64 %y) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i32, i32* [[P:%.*]], i64 [[X:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i32, i32* [[Q:%.*]], i64 [[Y:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[X]], [[Y]]
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], i32* [[GEP1]], i32* [[GEP2]]
; CHECK-NEXT: ret i32* [[SELECT]]
;
%gep1 = getelementptr inbounds i32, i32* %p, i64 %x
%gep2 = getelementptr inbounds i32, i32* %q, i64 %y
%cmp = icmp ugt i64 %x, %y
%select = select i1 %cmp, i32* %gep1, i32* %gep2
ret i32* %select
}
|
