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[MISched] Compare right next cluster node #116584

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Merged
merged 1 commit into from
Dec 10, 2024
Merged

[MISched] Compare right next cluster node #116584

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9 changes: 6 additions & 3 deletions llvm/lib/CodeGen/MachineScheduler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3958,9 +3958,12 @@ bool PostGenericScheduler::tryCandidate(SchedCandidate &Cand,
return TryCand.Reason != NoCand;

// Keep clustered nodes together.
if (tryGreater(TryCand.SU == DAG->getNextClusterSucc(),
Cand.SU == DAG->getNextClusterSucc(),
TryCand, Cand, Cluster))
const SUnit *CandNextClusterSU =
Cand.AtTop ? DAG->getNextClusterSucc() : DAG->getNextClusterPred();
const SUnit *TryCandNextClusterSU =
TryCand.AtTop ? DAG->getNextClusterSucc() : DAG->getNextClusterPred();
if (tryGreater(TryCand.SU == TryCandNextClusterSU,
Cand.SU == CandNextClusterSU, TryCand, Cand, Cluster))
return TryCand.Reason != NoCand;

// Avoid critical resource consumption and balance the schedule.
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2 changes: 1 addition & 1 deletion llvm/test/CodeGen/RISCV/macro-fusion-lui-addi.ll
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Expand Up @@ -47,8 +47,8 @@ define void @foo(i32 signext %0, i32 signext %1) {
; FUSION-POSTRA-BIDIRECTIONAL-LABEL: foo:
; FUSION-POSTRA-BIDIRECTIONAL: # %bb.0:
; FUSION-POSTRA-BIDIRECTIONAL-NEXT: lui a0, %hi(.L.str)
; FUSION-POSTRA-BIDIRECTIONAL-NEXT: fcvt.s.w fa0, a1
; FUSION-POSTRA-BIDIRECTIONAL-NEXT: addi a0, a0, %lo(.L.str)
; FUSION-POSTRA-BIDIRECTIONAL-NEXT: fcvt.s.w fa0, a1
; FUSION-POSTRA-BIDIRECTIONAL-NEXT: tail bar
%3 = sitofp i32 %1 to float
tail call void @bar(ptr @.str, float %3)
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