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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=correlated-propagation -S | FileCheck %s
declare void @use.f32(float)
define void @test1(i32 %n) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[N:%.*]], -1
; CHECK-NEXT: br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[EXT_WIDE:%.*]] = uitofp nneg i32 [[N]] to float
; CHECK-NEXT: call void @use.f32(float [[EXT_WIDE]])
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp sgt i32 %n, -1
br i1 %cmp, label %bb, label %exit
bb:
%ext.wide = sitofp i32 %n to float
call void @use.f32(float %ext.wide)
br label %exit
exit:
ret void
}
define void @test2_fail(i32 %n) {
; CHECK-LABEL: @test2_fail(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[N:%.*]], -2
; CHECK-NEXT: br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[EXT_WIDE:%.*]] = sitofp i32 [[N]] to float
; CHECK-NEXT: call void @use.f32(float [[EXT_WIDE]])
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp sgt i32 %n, -2
br i1 %cmp, label %bb, label %exit
bb:
%ext.wide = sitofp i32 %n to float
call void @use.f32(float %ext.wide)
br label %exit
exit:
ret void
}
define float @may_including_undef(i1 %c.1, i1 %c.2) {
; CHECK-LABEL: @may_including_undef(
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[TRUE_1:%.*]], label [[FALSE:%.*]]
; CHECK: true.1:
; CHECK-NEXT: br i1 [[C_2:%.*]], label [[TRUE_2:%.*]], label [[EXIT:%.*]]
; CHECK: true.2:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: false:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32 [ 0, [[TRUE_1]] ], [ 1, [[TRUE_2]] ], [ undef, [[FALSE]] ]
; CHECK-NEXT: [[EXT:%.*]] = sitofp i32 [[P]] to float
; CHECK-NEXT: ret float [[EXT]]
;
br i1 %c.1, label %true.1, label %false
true.1:
br i1 %c.2, label %true.2, label %exit
true.2:
br label %exit
false:
br label %exit
exit:
%p = phi i32 [ 0, %true.1 ], [ 1, %true.2], [ undef, %false ]
%ext = sitofp i32 %p to float
ret float %ext
}
define double @test_infer_at_use(i32 noundef %n) {
; CHECK-LABEL: @test_infer_at_use(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[N:%.*]], -1
; CHECK-NEXT: [[EXT:%.*]] = uitofp nneg i32 [[N]] to double
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], double [[EXT]], double 0.000000e+00
; CHECK-NEXT: ret double [[SELECT]]
;
%cmp = icmp sgt i32 %n, -1
%ext = sitofp i32 %n to double
%select = select i1 %cmp, double %ext, double 0.0
ret double %select
}
|
