7 Commits

Author	SHA1	Message	Date
Matt Arsenault	753d425ead	AMDGPU: Cost model for basic integer operations ... This resolves bug 21148 by preventing promotion to i64 induction variables. llvm-svn: 264376	2016-03-25 01:16:40 +00:00
Matt Arsenault	bfd4cf42ec	AMDGPU: Partially implement getArithmeticInstrCost for FP ops ... llvm-svn: 264374	2016-03-25 01:00:32 +00:00
Matt Arsenault	1c86c8a2a7	TTI: Report 0 cost for free addrspacecasts ... llvm-svn: 264369	2016-03-25 00:26:29 +00:00
Matt Arsenault	ab1f6bea74	TTI: Use 0 for cost of fabs if free ... Ideally this would also happen for fneg, but that isn't a distinct operation in the IR. llvm-svn: 264368	2016-03-25 00:26:22 +00:00
Matt Arsenault	ffa532b58f	AMDGPU: TTI: Make insertelement free. ... We don't want to have a cost to scalarizing operations. llvm-svn: 264364	2016-03-25 00:14:11 +00:00
Matt Arsenault	c7d6d736ee	AMDGPU: Override getCFInstrCost ... The default cost was 0 with the assumption that it is predictable. llvm-svn: 255796	2015-12-16 18:37:19 +00:00
Matt Arsenault	8a9536c837	AMDGPU: Report extractelement as free in cost model ... The cost for scalarized operations is computed as N * (scalar operation cost + 1 extractelement + 1 insertelement). This partially fixes inflating the cost of scalarized operations since every operation is scalarized and free. I don't think we want any cost asociated with scalarization, but for now insertelement is still counted. I'm not sure if we should pretend that insertelement is also free, or add a way to compute a custom scalarization cost. llvm-svn: 254438	2015-12-01 19:08:39 +00:00