6 Commits

Author SHA1 Message Date
chenglin.bi
33794cffcf [InstCombine] Fold logic-and/logic-or by distributive laws part2
Follow up https://reviews.llvm.org/D139408, support `and/or+select` patterns
X && Z || Y && Z --> (X || Y) && Z
https://alive2.llvm.org/ce/z/EMCkBG
https://alive2.llvm.org/ce/z/Q-YRvr
https://alive2.llvm.org/ce/z/SFkVQc
https://alive2.llvm.org/ce/z/S9MCuJ
https://alive2.llvm.org/ce/z/KZ7zzz

(X || Z) && (Y || Z) --> (X && Y) || Z
https://alive2.llvm.org/ce/z/Ggpa8-
https://alive2.llvm.org/ce/z/nhQRLY
https://alive2.llvm.org/ce/z/zpmEnq
https://alive2.llvm.org/ce/z/7omsrf
https://alive2.llvm.org/ce/z/CWBzBp

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D139630
2023-01-09 10:21:17 +08:00
chenglin.bi
ec48682ce9 [InstCombine] add more tests into select-factorize; NFC 2023-01-04 17:49:47 +08:00
Roman Lebedev
d73383c145
Revert "[InstCombine] Fold nested selects"
One of these two changes is exposing (or causing) some more miscompiles.
A reproducer is in progress, so reverting until resolved.

This reverts commit 9ddff66d0c9c3e18d56e6b20aa26a2a8cdfb6d2b.
2022-12-20 18:36:42 +03:00
chenglin.bi
c8647738cd [InstCombine] Fold logic-and/logic-or by distributive laws
X && Z || Y && Z --> (X || Y) && Z
https://alive2.llvm.org/ce/z/nM6kZb

(X || Z) && (Y || Z) --> (X && Y) || Z
https://alive2.llvm.org/ce/z/_EWLRR

Fix: https://github.com/llvm/llvm-project/issues/53861

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D139408
2022-12-14 04:43:06 +08:00
Roman Lebedev
9ddff66d0c
[InstCombine] Fold nested selects
https://alive2.llvm.org/ce/z/GjCXkB
https://alive2.llvm.org/ce/z/Guz2tt

Fixes https://github.com/llvm/llvm-project/issues/59393
2022-12-11 01:00:31 +03:00
chenglin.bi
3e4ae76d03 [Instcombine] Add baseline tests for logic-and/logic-or factorization; NFC 2022-12-06 17:35:35 +08:00