4 Commits

Author	SHA1	Message	Date
Michael Berg	8e570c3390	Utilize new SDNode flag functionality to expand current support for fma ... Summary: This patch originated from D47388 and is a proper subset of the originating changes, containing only the fmf optimization guard extensions. Reviewers: spatel, hfinkel, wristow, arsenm, javed.absar, rampitec, nhaehnle, nemanjai Reviewed By: rampitec, nhaehnle Subscribers: tpr, nemanjai, wdng Differential Revision: https://reviews.llvm.org/D47918 llvm-svn: 334876	2018-06-16 00:03:06 +00:00
Michael Berg	95f3a430a8	NFC, some additional tests added and some renaming for planned fma support changes ... llvm-svn: 334461	2018-06-12 00:52:43 +00:00
Adam Nemet	d5ffdd3605	[DAGCombine] Support FMF contract in fused multiple-and-sub too ... This is a follow-on to r299096 which added support for fmadd. Subtract does not have the case where with two multiply operands we commute in order to fuse with the multiply with the fewer uses. llvm-svn: 299572	2017-04-05 17:58:48 +00:00
Adam Nemet	edaec6de73	[DAGCombiner] Initial support for the fast-math flag contract ... Now alternatively to the TargetOption.AllowFPOpFusion global flag, FMUL->FADD can also use the per operation FMF to allow fusion. The idea here is not to port everything to the new scheme (e.g. fused multiply-and-sub will be ported later) but that this work all the way from clang. The transformation is conditionalized on *both* the FADD and the FMUL having the FMF contract flag. Differential Revision: https://reviews.llvm.org/D31169 llvm-svn: 299096	2017-03-30 18:53:04 +00:00