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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; PR12189
define i1 @test1(i32 %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: br i1 true, label [[A:%.*]], label [[B:%.*]]
; CHECK: a:
; CHECK-NEXT: [[AA:%.*]] = or i32 [[X:%.*]], 10
; CHECK-NEXT: br label [[C:%.*]]
; CHECK: b:
; CHECK-NEXT: [[BB:%.*]] = or i32 [[X]], 10
; CHECK-NEXT: br label [[C]]
; CHECK: c:
; CHECK-NEXT: [[CC:%.*]] = phi i32 [ [[BB]], [[B]] ], [ [[AA]], [[A]] ]
; CHECK-NEXT: [[D:%.*]] = urem i32 [[CC]], 2
; CHECK-NEXT: [[E:%.*]] = icmp eq i32 [[D]], 0
; CHECK-NEXT: ret i1 [[E]]
;
br i1 true, label %a, label %b
a:
%aa = or i32 %x, 10
br label %c
b:
%bb = or i32 %x, 10
br label %c
c:
%cc = phi i32 [ %bb, %b ], [%aa, %a ]
%d = urem i32 %cc, 2
%e = icmp eq i32 %d, 0
ret i1 %e
}
; D63489 - https://reviews.llvm.org/D63489
; If this single-value phi form needs to be preserved to enable
; further analysis, then -instsimplify should not be running?
define i32 @lcssa-phi(i32 %x) {
; CHECK-LABEL: @lcssa-phi(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: end:
; CHECK-NEXT: ret i32 [[X:%.*]]
;
entry:
br label %end
end:
%counter.lcssa = phi i32 [ %x, %entry ]
ret i32 %counter.lcssa
}
|
