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66 lines
2.1 KiB
LLVM
66 lines
2.1 KiB
LLVM
; RUN: opt -basic-aa -loop-distribute -enable-loop-distribute -S < %s | \
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; RUN: FileCheck %s --check-prefix=ALL --check-prefix=STRIDE_SPEC
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; RUN: opt -basic-aa -loop-distribute -enable-loop-distribute -S -enable-mem-access-versioning=0 < %s | \
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; RUN: FileCheck %s --check-prefix=ALL --check-prefix=NO_STRIDE_SPEC
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; If we don't speculate stride for 1 we can't distribute along the line
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; because we could have a backward dependence:
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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] * A[stride * 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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; ALL-LABEL: @f(
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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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i64 %stride) {
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entry:
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br label %for.body
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; STRIDE_SPEC: %ident.check = icmp ne i64 %stride, 1
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; STRIDE_SPEC: for.body.ldist1:
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; NO_STRIDE_SPEC-NOT: for.body.ldist1:
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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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%mul = mul i64 %ind, %stride
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%arrayidxStridedA = getelementptr inbounds i32, i32* %a, i64 %mul
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%loadStridedA = load i32, i32* %arrayidxStridedA, align 4
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%mulC = mul i32 %loadD, %loadStridedA
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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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