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LoopRotationUtils: Special case zero-branch weight cases (#66681 )

The formula I added to LoopRotationUtils does not produce reasonable
results if some of the branch weights are zero. Add special case
handling for this.

This fixes https://github.com/llvm/llvm-project/issues/66675

2023-09-22 12:57:13 -07:00

RISCV

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2009-01-25-SingleEntryPhi.ll

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alloca.ll

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basic.ll

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call-prepare-for-lto.ll

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callbr.ll

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catchret.ll

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convergent.ll

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crash.ll

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dbg-value-duplicates-2.ll

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dbg-value-duplicates.ll

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dbgvalue.ll

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freeze-crash.ll

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indirectbr.ll

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loopexitinglatch.ll

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multiple-deopt-exits.ll

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multiple-exits.ll

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noalias.ll

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nosimplifylatch.ll

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oz-disable.ll

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phi-dbgvalue.ll

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phi-duplicate.ll

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PhiRename-1.ll

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PhiSelfReference-1.ll

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pr2639.ll

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pr22337.ll

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pr33701.ll

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pr35210.ll

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pr37205.ll

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pr51981-scev-problem.ll

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pr56260.ll

Revert "Revert "InstSimplify: Require instruction be parented""

2023-06-16 13:53:31 -07:00

preserve-loop-simplify.ll

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preserve-mssa.ll

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preserve-scev.ll

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scev-block-and-loop-disposition-cache-invalidation.ll

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simplifylatch.ll

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switch.ll

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update-branch-weights.ll

LoopRotationUtils: Special case zero-branch weight cases (#66681 )

2023-09-22 12:57:13 -07:00

vect.omp.persistence.ll

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