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
|
; RUN: opt < %s -correlated-propagation -S | FileCheck %s
; PR2581
; CHECK: @test1
define i32 @test1(i1 %C) nounwind {
br i1 %C, label %exit, label %body
body: ; preds = %0
; CHECK-NOT: select
%A = select i1 %C, i32 10, i32 11 ; <i32> [#uses=1]
; CHECK: ret i32 11
ret i32 %A
exit: ; preds = %0
; CHECK: ret i32 10
ret i32 10
}
; PR4420
declare i1 @ext()
; CHECK: @test2
define i1 @test2() {
entry:
%cond = tail call i1 @ext() ; <i1> [#uses=2]
br i1 %cond, label %bb1, label %bb2
bb1: ; preds = %entry
%cond2 = tail call i1 @ext() ; <i1> [#uses=1]
br i1 %cond2, label %bb3, label %bb2
bb2: ; preds = %bb1, %entry
; CHECK-NOT: phi i1
%cond_merge = phi i1 [ %cond, %entry ], [ false, %bb1 ] ; <i1> [#uses=1]
; CHECK: ret i1 false
ret i1 %cond_merge
bb3: ; preds = %bb1
%res = tail call i1 @ext() ; <i1> [#uses=1]
; CHECK: ret i1 %res
ret i1 %res
}
; PR4855
@gv = internal constant i8 7
; CHECK: @test3
define i8 @test3(i8* %a) nounwind {
entry:
%cond = icmp eq i8* %a, @gv
br i1 %cond, label %bb2, label %bb
bb: ; preds = %entry
ret i8 0
bb2: ; preds = %entry
; CHECK: %should_be_const = load i8* @gv
%should_be_const = load i8* %a
ret i8 %should_be_const
}
; PR1757
; CHECK: @test4
define i32 @test4(i32) {
EntryBlock:
; CHECK: icmp sgt i32 %0, 2
%.demorgan = icmp sgt i32 %0, 2
br i1 %.demorgan, label %GreaterThanTwo, label %LessThanOrEqualToTwo
GreaterThanTwo:
; CHECK-NOT: icmp eq i32 %0, 2
icmp eq i32 %0, 2
; CHECK: br i1 false
br i1 %1, label %Impossible, label %NotTwoAndGreaterThanTwo
NotTwoAndGreaterThanTwo:
ret i32 2
Impossible:
ret i32 1
LessThanOrEqualToTwo:
ret i32 0
}
|
