4 Commits

Author	SHA1	Message	Date
Roman Lebedev	aa2009fe78	[NFCI][SimplifyCFG] Mark all the SimplifyCFG tests that already don't invalidate DomTree as such ... First step after e113317958, in these tests, DomTree is valid afterwards, so mark them as such, so that they don't regress. In further steps, SimplifyCFG transforms shall taught to preserve DomTree, in as small steps as possible.	2020-12-17 01:03:49 +03:00
Roman Lebedev	04b729d076	[NFCI][SimplifyCFG] Guard common code hoisting with a (default-on) flag ... Common code sinking is already guarded with a (with default-off!) flag, so add a flag for hoisting, too. D84108 will hopefully make hoisting off-by-default too.	2020-07-20 10:29:57 +03:00
Chen Zheng	3f85134d71	[PowerPC] implement target hook isProfitableToHoist ... On Powerpc fma is faster than fadd + fmul for some types, (PPCTargetLowering::isFMAFasterThanFMulAndFAdd). we should implement target hook isProfitableToHoist to prevent simplifyCFGpass from breaking fma pattern by hoisting fmul to predecessor block. Reviewed By: nemanjai Differential Revision: https://reviews.llvm.org/D76207	2020-03-19 00:17:25 -04:00
Chen Zheng	fa72b29bec	[PowerPC] add test cases for target hook isProfitableToHoist - NFC	2020-03-16 23:07:30 -04:00