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
| ; RUN: opt < %s -simplifycfg -S | FileCheck %s
define void @test(i32* %P, i32* %Q, i1 %A, i1 %B) {
; CHECK: test
; CHECK: br i1
; CHECK-NOT: br i1
; CHECK: ret
; CHECK: ret
entry:
br i1 %A, label %a, label %b
a:
br i1 %B, label %b, label %c
b:
store i32 123, i32* %P
ret void
c:
ret void
}
; rdar://10554090
define zeroext i1 @test2(i64 %i0, i64 %i1) nounwind uwtable readonly ssp {
entry:
; CHECK: test2
; CHECK: br i1
%and.i.i = and i64 %i0, 281474976710655
%and.i11.i = and i64 %i1, 281474976710655
%or.cond = icmp eq i64 %and.i.i, %and.i11.i
br i1 %or.cond, label %c, label %a
a:
; CHECK: br
%shr.i4.i = lshr i64 %i0, 48
%and.i5.i = and i64 %shr.i4.i, 32767
%shr.i.i = lshr i64 %i1, 48
%and.i2.i = and i64 %shr.i.i, 32767
%cmp9.i = icmp ult i64 %and.i5.i, %and.i2.i
br i1 %cmp9.i, label %c, label %b
b:
; CHECK-NOT: br
%shr.i13.i9 = lshr i64 %i1, 48
%and.i14.i10 = and i64 %shr.i13.i9, 32767
%shr.i.i11 = lshr i64 %i0, 48
%and.i11.i12 = and i64 %shr.i.i11, 32767
%phitmp = icmp uge i64 %and.i14.i10, %and.i11.i12
br label %c
c:
%o2 = phi i1 [ false, %a ], [ %phitmp, %b ], [ false, %entry ]
ret i1 %o2
}
; PR13180
define void @pr13180(i8 %p) {
entry:
%tobool = icmp eq i8 %p, 0
br i1 %tobool, label %cond.false, label %cond.true
cond.true: ; preds = %entry
br label %cond.end
cond.false: ; preds = %entry
%phitmp = icmp eq i8 %p, 0
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
%cond = phi i1 [ undef, %cond.true ], [ %phitmp, %cond.false ]
unreachable
}
|