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bc52cc0c7b
We currently collect the ICmp and Add from an induction variable, marking them as dead so that vplan values are not created for them. This extends that to include any single use trunk from the ICmp, which allows the Add to more readily be removed too. This can help with costing vplan nodes, as the ICmp and Add are more reliably removed and are not double-counted. Differential Revision: https://reviews.llvm.org/D88873
44 lines
1.8 KiB
LLVM
44 lines
1.8 KiB
LLVM
; RUN: opt -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -S < %s | FileCheck %s
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;
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; Check that the followup loop attributes are applied.
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;
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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define void @followup(i32* nocapture %a, i32 %n) {
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entry:
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%cmp4 = icmp sgt i32 %n, 0
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br i1 %cmp4, label %for.body, label %for.end
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for.body:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
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for.end:
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ret void
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}
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!0 = distinct !{!0, !3, !4, !5}
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!3 = !{!"llvm.loop.vectorize.followup_vectorized", !{!"FollowupVectorized"}}
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!4 = !{!"llvm.loop.vectorize.followup_epilogue", !{!"FollowupEpilogue"}}
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!5 = !{!"llvm.loop.vectorize.followup_all", !{!"FollowupAll"}}
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; CHECK-LABEL: @followup(
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; CHECK-LABEL: vector.body:
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; CHECK: br i1 %{{[0-9]*}}, label %middle.block, label %vector.body, !llvm.loop ![[LOOP_VECTOR:[0-9]+]]
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; CHECK-LABEL: for.body:
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; CHECK: br i1 %exitcond, label %for.end.loopexit, label %for.body, !llvm.loop ![[LOOP_EPILOGUE:[0-9]+]]
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; CHECK: ![[LOOP_VECTOR]] = distinct !{![[LOOP_VECTOR]], ![[FOLLOWUP_ALL:[0-9]+]], ![[FOLLOWUP_VECTORIZED:[0-9]+]]}
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; CHECK: ![[FOLLOWUP_ALL]] = !{!"FollowupAll"}
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; CHECK: ![[FOLLOWUP_VECTORIZED:[0-9]+]] = !{!"FollowupVectorized"}
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; CHECK: ![[LOOP_EPILOGUE]] = distinct !{![[LOOP_EPILOGUE]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_EPILOGUE:[0-9]+]]}
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; CHECK: ![[FOLLOWUP_EPILOGUE]] = !{!"FollowupEpilogue"}
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