60 lines
1.8 KiB
LLVM
60 lines
1.8 KiB
LLVM
; RUN: opt -basic-aa -loop-distribute -enable-loop-distribute -loop-vectorize -force-vector-width=4 \
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; RUN: -verify-loop-info -verify-dom-info -S < %s | FileCheck %s
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; If only A and B can alias here, we don't need memchecks to distribute since
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; A and B are in the same partition. This used to cause a crash in the
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; memcheck generation.
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;
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; for (i = 0; i < n; i++) {
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; A[i + 1] = A[i] * B[i];
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; ------------------------------
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; C[i] = D[i] * E[i];
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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define void @f(i32* %a,
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i32* %b,
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i32* noalias %c,
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i32* noalias %d,
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i32* noalias %e) {
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entry:
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br label %for.body
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; CHECK-NOT: memcheck:
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; CHECK: mul <4 x i32>
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for.body: ; preds = %for.body, %entry
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%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
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%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
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%loadA = load i32, i32* %arrayidxA, align 4
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%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
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%loadB = load i32, i32* %arrayidxB, align 4
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%mulA = mul i32 %loadB, %loadA
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%add = add nuw nsw i64 %ind, 1
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%arrayidxA_plus_4 = getelementptr inbounds i32, i32* %a, i64 %add
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store i32 %mulA, i32* %arrayidxA_plus_4, align 4
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%arrayidxD = getelementptr inbounds i32, i32* %d, i64 %ind
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%loadD = load i32, i32* %arrayidxD, align 4
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%arrayidxE = getelementptr inbounds i32, i32* %e, i64 %ind
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%loadE = load i32, i32* %arrayidxE, align 4
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%mulC = mul i32 %loadD, %loadE
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%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
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store i32 %mulC, i32* %arrayidxC, align 4
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%exitcond = icmp eq i64 %add, 20
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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