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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -O1 -S < %s | FileCheck %s --check-prefix=ALL --check-prefix=OLDPM
; RUN: opt -passes='default<O1>' -S < %s | FileCheck %s --check-prefix=ALL --check-prefix=NEWPM
; Don't simplify unconditional branches from empty blocks in simplifyCFG
; until late in the pipeline because it can destroy canonical loop structure.
define i1 @PR33605(i32 %a, i32 %b, i32* %c) {
; ALL-LABEL: @PR33605(
; ALL-NEXT: for.body:
; ALL-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]]
; ALL-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 1
; ALL-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
; ALL-NEXT: [[CMP:%.*]] = icmp eq i32 [[OR]], [[TMP0]]
; ALL-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; ALL: if.then:
; ALL-NEXT: store i32 [[OR]], i32* [[ARRAYIDX]], align 4
; ALL-NEXT: tail call void @foo()
; ALL-NEXT: br label [[IF_END]]
; ALL: if.end:
; ALL-NEXT: [[CHANGED_1_OFF0:%.*]] = phi i1 [ true, [[IF_THEN]] ], [ false, [[FOR_BODY:%.*]] ]
; ALL-NEXT: [[TMP1:%.*]] = load i32, i32* [[C]], align 4
; ALL-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[OR]], [[TMP1]]
; ALL-NEXT: br i1 [[CMP_1]], label [[IF_END_1:%.*]], label [[IF_THEN_1:%.*]]
; ALL: if.then.1:
; ALL-NEXT: store i32 [[OR]], i32* [[C]], align 4
; ALL-NEXT: tail call void @foo()
; ALL-NEXT: br label [[IF_END_1]]
; ALL: if.end.1:
; ALL-NEXT: [[CHANGED_1_OFF0_1:%.*]] = phi i1 [ true, [[IF_THEN_1]] ], [ [[CHANGED_1_OFF0]], [[IF_END]] ]
; ALL-NEXT: ret i1 [[CHANGED_1_OFF0_1]]
;
entry:
br label %for.cond
for.cond:
%i.0 = phi i32 [ 2, %entry ], [ %dec, %if.end ]
%changed.0.off0 = phi i1 [ false, %entry ], [ %changed.1.off0, %if.end ]
%dec = add nsw i32 %i.0, -1
%tobool = icmp eq i32 %i.0, 0
br i1 %tobool, label %for.cond.cleanup, label %for.body
for.cond.cleanup:
%changed.0.off0.lcssa = phi i1 [ %changed.0.off0, %for.cond ]
ret i1 %changed.0.off0.lcssa
for.body:
%or = or i32 %a, %b
%idxprom = sext i32 %dec to i64
%arrayidx = getelementptr inbounds i32, i32* %c, i64 %idxprom
%0 = load i32, i32* %arrayidx, align 4
%cmp = icmp eq i32 %or, %0
br i1 %cmp, label %if.end, label %if.then
if.then:
store i32 %or, i32* %arrayidx, align 4
call void @foo()
br label %if.end
if.end:
%changed.1.off0 = phi i1 [ true, %if.then ], [ %changed.0.off0, %for.body ]
br label %for.cond
}
declare void @foo()
|
