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104 Commits

Author SHA1 Message Date
Matt Arsenault e05ff15186 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
Tom Stellard dbe374b2c5 AMDGPU/SI: Implement AMDGPUTargetTransformInfo::isSourceOfDivergence() 
Reviewers: arsenm

Subscribers: arsenm, llvm-commits

Differential Revision: http://reviews.llvm.org/D15476

llvm-svn: 255661
 2015-12-15 18:04:38 +00:00
Matt Arsenault e830f5427b 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
Tom Stellard 45bb48ea19 R600 -> AMDGPU rename 
llvm-svn: 239657
 2015-06-13 03:28:10 +00:00