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: Interesting 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: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
18 ; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
20 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
21 ; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
23 @B = common global i16* null, align 8
24 @A = common global i16* null, align 8
25 @C = common global i16* null, align 8
29 %a = load i16*, i16** @A, align 8
30 %b = load i16*, i16** @B, align 8
31 %c = load i16*, i16** @C, align 8
34 for.body: ; preds = %for.body, %entry
35 %storemerge3 = phi i64 [ 0, %entry ], [ %add, %for.body ]
37 %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3
38 %loadA = load i16, i16* %arrayidxA, align 2
40 %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3
41 %loadB = load i16, i16* %arrayidxB, align 2
43 %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3
44 %loadC = load i16, i16* %arrayidxC, align 2
46 %mul = mul i16 %loadB, %loadA
47 %mul1 = mul i16 %mul, %loadC
49 %add = add nuw nsw i64 %storemerge3, 1
50 %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add
51 store i16 %mul1, i16* %arrayidxA_plus_2, align 2
53 %exitcond = icmp eq i64 %add, 20
54 br i1 %exitcond, label %for.end, label %for.body
56 for.end: ; preds = %for.body