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[SCEV] Use isBasicBlockEntryGuardedByCond in isLoopBackedgeGuardedByCond
3d4c0460ec60
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Authored by mkazantsev on Nov 26 2020, 1:59 AM.

Description

[SCEV] Use isBasicBlockEntryGuardedByCond in isLoopBackedgeGuardedByCond

Previously we tried to using isKnownPredicateAt, but it makes an
extra query to isKnownPredicate, which has negative impact on compile
time. Let's try to use more lightweight isBasicBlockEntryGuardedByCond.

Differential Revision: https://reviews.llvm.org/D92152

Details

Committed

mkazantsev

Nov 26 2020, 2:08 AM

Differential Revision

D92152: [SCEV] Use isKnownPredicateAt in isLoopBackedgeGuardedByCond

Parents

rGd9500c2e230e: [RISCV] Add isel patterns for sbsetw/sbclrw/sbinvw with sext_inreg as the root.

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Reverted By

rG91d6b6b5fb94: Revert "[SCEV] Use isBasicBlockEntryGuardedByCond in…

Event Timeline

mkazantsev committed rG3d4c0460ec60: [SCEV] Use isBasicBlockEntryGuardedByCond in isLoopBackedgeGuardedByCond (authored by mkazantsev).Nov 26 2020, 2:08 AM

mkazantsev added an edge: D92152: [SCEV] Use isKnownPredicateAt in isLoopBackedgeGuardedByCond.

mkazantsev added a reverting change: rG91d6b6b5fb94: Revert "[SCEV] Use isBasicBlockEntryGuardedByCond in….Nov 26 2020, 2:28 AM

Changes (2)

Path

Size

llvm/

lib/

Analysis/

ScalarEvolution.cpp

test/

Transforms/

LoopStrengthReduce/

post-inc-icmpzero.ll

rG3d4c0460ec60

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llvm/lib/Analysis/ScalarEvolution.cpp