derek.holloway
7502bf64a4
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38 lines
1.9 KiB
LLVM
38 lines
1.9 KiB
LLVM
; RUN: opt < %s -S -unroll-partial-threshold=20 -unroll-threshold=20 -passes=loop-unroll -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-partial-threshold=20 -unroll-threshold=20 -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s
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;
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; Also check that the simple unroller doesn't allow the partial unrolling.
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' -unroll-partial-threshold=20 -unroll-threshold=20 -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s --check-prefix=CHECK-NO-UNROLL
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; The Loop TripCount is 9. However unroll factors 3 or 9 exceed given threshold.
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; The test checks that we choose a smaller, power-of-two, unroll count and do not give up on unrolling.
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; CHECK: for.body:
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; CHECK: store
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; CHECK: for.body.1:
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; CHECK: store
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; CHECK-NO-UNROLL: for.body:
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; CHECK-NO-UNROLL: store
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; CHECK-NO-UNROLL-NOT: store
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define void @foo(ptr nocapture %a, ptr nocapture readonly %b) nounwind uwtable {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %b, i64 %indvars.iv
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%ld = load i32, ptr %arrayidx, align 4
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%idxprom1 = sext i32 %ld to i64
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%arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %idxprom1
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%st = trunc i64 %indvars.iv to i32
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store i32 %st, ptr %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 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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