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
|
; RUN: opt < %s -loop-accesses -analyze | FileCheck %s
; Test to confirm LAA will not find store to invariant address.
; Inner loop has no store to invariant address.
;
; for(; i < itr; i++) {
; for(; j < itr; j++) {
; var2[j] = var2[j] + var1[i];
; }
; }
; CHECK: Store to invariant address was not found in loop.
; CHECK-NOT: Store to invariant address was found in loop.
define i32 @foo(i32* nocapture readonly %var1, i32* nocapture %var2, i32 %itr) #0 {
entry:
%cmp20 = icmp eq i32 %itr, 0
br i1 %cmp20, label %for.end10, label %for.cond1.preheader
for.cond1.preheader: ; preds = %entry, %for.inc8
%indvars.iv23 = phi i64 [ %indvars.iv.next24, %for.inc8 ], [ 0, %entry ]
%j.022 = phi i32 [ %j.1.lcssa, %for.inc8 ], [ 0, %entry ]
%cmp218 = icmp ult i32 %j.022, %itr
br i1 %cmp218, label %for.body3.lr.ph, label %for.inc8
for.body3.lr.ph: ; preds = %for.cond1.preheader
%arrayidx5 = getelementptr inbounds i32, i32* %var1, i64 %indvars.iv23
%0 = zext i32 %j.022 to i64
br label %for.body3
for.body3: ; preds = %for.body3, %for.body3.lr.ph
%indvars.iv = phi i64 [ %0, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ]
%arrayidx = getelementptr inbounds i32, i32* %var2, i64 %indvars.iv
%1 = load i32, i32* %arrayidx, align 4
%2 = load i32, i32* %arrayidx5, align 4
%add = add nsw i32 %2, %1
store i32 %add, i32* %arrayidx, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %itr
br i1 %exitcond, label %for.inc8, label %for.body3
for.inc8: ; preds = %for.body3, %for.cond1.preheader
%j.1.lcssa = phi i32 [ %j.022, %for.cond1.preheader ], [ %itr, %for.body3 ]
%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
%lftr.wideiv25 = trunc i64 %indvars.iv.next24 to i32
%exitcond26 = icmp eq i32 %lftr.wideiv25, %itr
br i1 %exitcond26, label %for.end10, label %for.cond1.preheader
for.end10: ; preds = %for.inc8, %entry
ret i32 undef
}
|
