3 Commits

Author	SHA1	Message	Date
QingShan Zhang	d577193c0f	[DAGCombine] Respect the uses when combine FMA for a*b+/-c*d ... If it is a*b-c*d, it could be also folded into fma(a, b, -c*d) or fma(-c, d, a*b). This patch is trying to respect the uses of a*b and c*d to make the best choice. Differential Revision: https://reviews.llvm.org/D75982	2020-03-18 03:34:27 +00:00
QingShan Zhang	f84beee9b8	[NFC][Test] Add three tests to verify the behavior of a*b-c*d if there is multi-uses	2020-03-16 01:58:49 +00:00
QingShan Zhang	9304decdee	[NFC][Test] Add a PowerPC test to verify the behavior of a*b +/- c*d	2020-03-11 09:35:40 +00:00