1 ; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
3 ; FIXME: This is the non-debug version of unsafe-and-rt-checks.ll not
4 ; requiring "asserts". Once we can check memory dependences without -debug,
5 ; we should remove this test.
8 ; for (i = 0; i < n; i++)
9 ; A[i + 1] = A[i] * B[i] * C[i];
11 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-apple-macosx10.10.0"
14 ; CHECK: Report: unsafe dependent memory operations in loop
16 ; CHECK: Run-time memory checks:
18 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16* %a, i64 %add
19 ; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16* %b, i64 %storemerge3
21 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16* %a, i64 %add
22 ; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16* %c, i64 %storemerge3
24 @n = global i32 20, align 4
25 @B = common global i16* null, align 8
26 @A = common global i16* null, align 8
27 @C = common global i16* null, align 8
31 %a = load i16** @A, align 8
32 %b = load i16** @B, align 8
33 %c = load i16** @C, align 8
36 for.body: ; preds = %for.body, %entry
37 %storemerge3 = phi i64 [ 0, %entry ], [ %add, %for.body ]
39 %arrayidxA = getelementptr inbounds i16* %a, i64 %storemerge3
40 %loadA = load i16* %arrayidxA, align 2
42 %arrayidxB = getelementptr inbounds i16* %b, i64 %storemerge3
43 %loadB = load i16* %arrayidxB, align 2
45 %arrayidxC = getelementptr inbounds i16* %c, i64 %storemerge3
46 %loadC = load i16* %arrayidxC, align 2
48 %mul = mul i16 %loadB, %loadA
49 %mul1 = mul i16 %mul, %loadC
51 %add = add nuw nsw i64 %storemerge3, 1
52 %arrayidxA_plus_2 = getelementptr inbounds i16* %a, i64 %add
53 store i16 %mul1, i16* %arrayidxA_plus_2, align 2
55 %exitcond = icmp eq i64 %add, 20
56 br i1 %exitcond, label %for.end, label %for.body
58 for.end: ; preds = %for.body