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
|
; RUN: opt < %s -O1 -S -loop-versioning-licm -licm -debug-only=loop-versioning-licm -enable-new-pm=0 2>&1 | FileCheck %s
; RUN: opt < %s -S -passes='default<O1>,function(loop-versioning-licm,loop-mssa(licm))' -debug-only=loop-versioning-licm 2>&1 | FileCheck %s
; REQUIRES: asserts
;
; Test to confirm loop is a candidate for LoopVersioningLICM.
; It also confirms invariant moved out of loop.
;
; CHECK: Loop: Loop at depth 2 containing: %for.body3<header><latch><exiting>
; CHECK-NEXT: Loop Versioning found to be beneficial
;
; CHECK: for.body3:
; CHECK-NEXT: %[[induction:.*]] = phi i32 [ %arrayidx7.promoted, %for.body3.ph ], [ %add8, %for.body3 ]
; CHECK-NEXT: %j.113 = phi i32 [ %j.016, %for.body3.ph ], [ %inc, %for.body3 ]
; CHECK-NEXT: %idxprom = zext i32 %j.113 to i64
; CHECK-NEXT: %arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom
; CHECK-NEXT: store i32 %add, i32* %arrayidx, align 4, !alias.scope !2, !noalias !2
; CHECK-NEXT: %add8 = add nsw i32 %[[induction]], %add
; CHECK-NEXT: %inc = add nuw i32 %j.113, 1
; CHECK-NEXT: %cmp2 = icmp ult i32 %inc, %itr
; CHECK-NEXT: br i1 %cmp2, label %for.body3, label %for.inc11.loopexit.loopexit9, !llvm.loop !5
define i32 @foo(i32* nocapture %var1, i32* nocapture readnone %var2, i32* nocapture %var3, i32 %itr) #0 {
entry:
%cmp14 = icmp eq i32 %itr, 0
br i1 %cmp14, label %for.end13, label %for.cond1.preheader.preheader
for.cond1.preheader.preheader: ; preds = %entry
br label %for.cond1.preheader
for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc11
%j.016 = phi i32 [ %j.1.lcssa, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ]
%i.015 = phi i32 [ %inc12, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ]
%cmp212 = icmp ult i32 %j.016, %itr
br i1 %cmp212, label %for.body3.lr.ph, label %for.inc11
for.body3.lr.ph: ; preds = %for.cond1.preheader
%add = add i32 %i.015, %itr
%idxprom6 = zext i32 %i.015 to i64
%arrayidx7 = getelementptr inbounds i32, i32* %var3, i64 %idxprom6
br label %for.body3
for.body3: ; preds = %for.body3.lr.ph, %for.body3
%j.113 = phi i32 [ %j.016, %for.body3.lr.ph ], [ %inc, %for.body3 ]
%idxprom = zext i32 %j.113 to i64
%arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom
store i32 %add, i32* %arrayidx, align 4
%0 = load i32, i32* %arrayidx7, align 4
%add8 = add nsw i32 %0, %add
store i32 %add8, i32* %arrayidx7, align 4
%inc = add nuw i32 %j.113, 1
%cmp2 = icmp ult i32 %inc, %itr
br i1 %cmp2, label %for.body3, label %for.inc11.loopexit
for.inc11.loopexit: ; preds = %for.body3
br label %for.inc11
for.inc11: ; preds = %for.inc11.loopexit, %for.cond1.preheader
%j.1.lcssa = phi i32 [ %j.016, %for.cond1.preheader ], [ %itr, %for.inc11.loopexit ]
%inc12 = add nuw i32 %i.015, 1
%cmp = icmp ult i32 %inc12, %itr
br i1 %cmp, label %for.cond1.preheader, label %for.end13.loopexit
for.end13.loopexit: ; preds = %for.inc11
br label %for.end13
for.end13: ; preds = %for.end13.loopexit, %entry
ret i32 0
}
|
