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| author | Roman Lebedev <lebedev.ri@gmail.com> | 2019-11-06 14:57:49 +0300 |
|---|---|---|
| committer | Roman Lebedev <lebedev.ri@gmail.com> | 2019-11-06 15:08:59 +0300 |
| commit | 4fe94d033120da2000f1f31f0c54f3d95a159a53 (patch) | |
| tree | d3fb5644dd34a20b4b12b96172dacc7506d629fc /lldb/packages/Python/lldbsuite/test/python_api/section/main.c | |
| parent | 432a12c8037293bd1ff919a82f1d4412772ac534 (diff) | |
| download | bcm5719-llvm-4fe94d033120da2000f1f31f0c54f3d95a159a53.tar.gz bcm5719-llvm-4fe94d033120da2000f1f31f0c54f3d95a159a53.zip | |
[LoopUnroll] countToEliminateCompares(): fix handling of [in]equality predicates (PR43840)
Summary:
I believe this bisects to https://reviews.llvm.org/D44983
(`[LoopUnroll] Only peel if a predicate becomes known in the loop body.`)
While that revision did contain tests that showed arguably-subpar peeling
for [in]equality predicates that [not] happen in the middle of the loop,
it also disabled peeling for the *first* loop iteration,
because latch would be canonicalized to [in]equality comparison..
That was intentional as per https://reviews.llvm.org/D44983#1059583.
I'm not 100% sure that i'm using correct checks here,
but this fix appears to be going in the right direction..
Let me know if i'm missing some checks here..
Fixes [[ https://bugs.llvm.org/show_bug.cgi?id=43840 | PR43840 ]].
Reviewers: fhahn, mkazantsev, efriedma
Reviewed By: fhahn
Subscribers: xbolva00, hiraditya, zzheng, llvm-commits, fhahn
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69617
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/section/main.c')
0 files changed, 0 insertions, 0 deletions
