1 ; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
4 ; for (i = 0; i < n; i++)
5 ; A[i + 1] = A[i] * B[i] * C[i];
7 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
8 target triple = "x86_64-apple-macosx10.10.0"
10 ; CHECK: Report: unsafe dependent memory operations in loop
11 ; CHECK-NEXT: Dependences:
12 ; CHECK-NEXT: Backward:
13 ; CHECK-NEXT: %loadA = load i16, i16* %arrayidxA, align 2 ->
14 ; CHECK-NEXT: store i16 %mul1, i16* %arrayidxA_plus_2, align 2
15 ; CHECK: Run-time memory checks:
17 ; CHECK-NEXT: Comparing group
18 ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
19 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
20 ; CHECK-NEXT: Against group
21 ; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
23 ; CHECK-NEXT: Comparing group
24 ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
25 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
26 ; CHECK-NEXT: Against group
27 ; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
29 @B = common global i16* null, align 8
30 @A = common global i16* null, align 8
31 @C = common global i16* null, align 8
35 %a = load i16*, i16** @A, align 8
36 %b = load i16*, i16** @B, align 8
37 %c = load i16*, i16** @C, align 8
40 for.body: ; preds = %for.body, %entry
41 %storemerge3 = phi i64 [ 0, %entry ], [ %add, %for.body ]
43 %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
44 %loadA = load i16, i16* %arrayidxA, align 2
46 %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
47 %loadB = load i16, i16* %arrayidxB, align 2
49 %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
50 %loadC = load i16, i16* %arrayidxC, align 2
52 %mul = mul i16 %loadB, %loadA
53 %mul1 = mul i16 %mul, %loadC
55 %add = add nuw nsw i64 %storemerge3, 1
56 %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
57 store i16 %mul1, i16* %arrayidxA_plus_2, align 2
59 %exitcond = icmp eq i64 %add, 20
60 br i1 %exitcond, label %for.end, label %for.body
62 for.end: ; preds = %for.body