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96 lines
2.9 KiB
LLVM
96 lines
2.9 KiB
LLVM
; RUN: opt -basic-aa -loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S < %s \
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; RUN: | FileCheck %s
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; We should distribute this loop along === but not along ---. The last
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; partition won't be vectorized due to conditional stores so it's better to
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; keep it with the second partition which has a dependence cycle.
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; (1st statement):
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; for (i = 0; i < n; i++) {
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; C[i] = D[i] * E[i];
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;=============================
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; A[i + 1] = A[i] * B[i];
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;-----------------------------
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; if (F[i])
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; G[i] = H[i] * J[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* noalias %a,
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i32* noalias %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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i32* noalias %g,
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i32* noalias %h,
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i32* noalias %j,
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i64 %x) {
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entry:
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br label %for.body
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; Ensure that we have only two partitions, the first with one multiplication
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; and the second with two.
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; CHECK: for.body.ldist1:
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; CHECK: %mulC.ldist1 = mul i32 %loadD.ldist1, %loadE.ldist1
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; CHECK: br i1 %exitcond.ldist1, label %entry.split, label %for.body.ldist1
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; CHECK: entry.split:
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; CHECK: br label %for.body
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; CHECK: for.body:
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; CHECK: %mulA = mul i32 %loadB, %loadA
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; CHECK: %mulG = mul i32 %loadH, %loadJ
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; CHECK: for.end:
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for.body: ; preds = %for.body, %entry
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%ind = phi i64 [ 0, %entry ], [ %add, %if.end ]
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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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%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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%if.cond = icmp eq i64 %ind, %x
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br i1 %if.cond, label %if.then, label %if.end
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if.then:
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%arrayidxH = getelementptr inbounds i32, i32* %h, i64 %ind
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%loadH = load i32, i32* %arrayidxH, align 4
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%arrayidxJ = getelementptr inbounds i32, i32* %j, i64 %ind
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%loadJ = load i32, i32* %arrayidxJ, align 4
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%mulG = mul i32 %loadH, %loadJ
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%arrayidxG = getelementptr inbounds i32, i32* %g, i64 %ind
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store i32 %mulG, i32* %arrayidxG, align 4
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br label %if.end
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if.end:
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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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