source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/LoopAccessAnalysis/store-to-invariant-check2.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

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Line 
1; RUN: opt < %s -loop-accesses -analyze  | FileCheck %s
2
3; Test to confirm LAA will not find store to invariant address.
4; Inner loop has no store to invariant address.
5;
6;  for(; i < itr; i++) {
7;    for(; j < itr; j++) {
8;      var2[j] = var2[j] + var1[i];
9;    }
10;  }
11
12; CHECK: Store to invariant address was not found in loop.
13; CHECK-NOT: Store to invariant address was found in loop.
14
15
16define i32 @foo(i32* nocapture readonly %var1, i32* nocapture %var2, i32 %itr) #0 {
17entry:
18  %cmp20 = icmp eq i32 %itr, 0
19  br i1 %cmp20, label %for.end10, label %for.cond1.preheader
20
21for.cond1.preheader:                              ; preds = %entry, %for.inc8
22  %indvars.iv23 = phi i64 [ %indvars.iv.next24, %for.inc8 ], [ 0, %entry ]
23  %j.022 = phi i32 [ %j.1.lcssa, %for.inc8 ], [ 0, %entry ]
24  %cmp218 = icmp ult i32 %j.022, %itr
25  br i1 %cmp218, label %for.body3.lr.ph, label %for.inc8
26
27for.body3.lr.ph:                                  ; preds = %for.cond1.preheader
28  %arrayidx5 = getelementptr inbounds i32, i32* %var1, i64 %indvars.iv23
29  %0 = zext i32 %j.022 to i64
30  br label %for.body3
31
32for.body3:                                        ; preds = %for.body3, %for.body3.lr.ph
33  %indvars.iv = phi i64 [ %0, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ]
34  %arrayidx = getelementptr inbounds i32, i32* %var2, i64 %indvars.iv
35  %1 = load i32, i32* %arrayidx, align 4
36  %2 = load i32, i32* %arrayidx5, align 4
37  %add = add nsw i32 %2, %1
38  store i32 %add, i32* %arrayidx, align 4
39  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
40  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
41  %exitcond = icmp eq i32 %lftr.wideiv, %itr
42  br i1 %exitcond, label %for.inc8, label %for.body3
43
44for.inc8:                                         ; preds = %for.body3, %for.cond1.preheader
45  %j.1.lcssa = phi i32 [ %j.022, %for.cond1.preheader ], [ %itr, %for.body3 ]
46  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
47  %lftr.wideiv25 = trunc i64 %indvars.iv.next24 to i32
48  %exitcond26 = icmp eq i32 %lftr.wideiv25, %itr
49  br i1 %exitcond26, label %for.end10, label %for.cond1.preheader
50
51for.end10:                                        ; preds = %for.inc8, %entry
52  ret i32 undef
53}
54
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