6 Commits

Author	SHA1	Message	Date
Simon Pilgrim	4455c5cdea	[CostModel][X86] Update RUN -passes=* to double quotes to appease update scripts on windows	2022-03-18 11:44:18 +00:00
Arthur Eubanks	15ba588d6d	[test] Migrate '-analyze -cost-model' to '-passes=print<cost-model>'	2022-02-09 15:42:16 -08:00
Haohai Wen	d2c093e79d	[CostModel][X86] Add i64 mul cost for avx512 as 1cy ... i64 mul cost is 1cy for all cpu that support avx512. Currently all X86 cpu uses i64 mul cost in X64 cost table which is not true for cpu that support avx512 (skx, icx). Reviewed By: pengfei, RKSimon Differential Revision: https://reviews.llvm.org/D115016	2021-12-08 11:29:08 +08:00
Roman Lebedev	a468c39c90	[X86][Costmodel] `trunc v32i16 to v64i8` can appear after legalization, cost is same as for `trunc v32i16 to v32i8` ... Some of the costs get larger here, but i suppose that makes sense since we'd previously query scalarization costs that may not be really representative of the reality. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D113852	2021-11-15 19:04:02 +03:00
Simon Pilgrim	5b395bd633	[CostModel][X86] Add costs for multiply-by-pow2 constants ... These are folded to left shifts in the backend. We should be able to extend this for multiply-by-negpow2 after D111968 has landed to resolve PR51436	2021-10-20 13:11:21 +01:00
Simon Pilgrim	dc3382dc2c	[CostModel][X86] Add mul by positive/negative power-of-2 constants tests ... We have backend optimizations for these, but currently the costmodel doesn't match them	2021-10-17 20:34:17 +01:00