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Author SHA1 Message Date
Matt Arsenault 2aed6ca1d3 AMDGPU: Switch barrier intrinsics to using convergent 
noduplicate prevents unrolling of small loops that happen to have
barriers in them. If a loop has a barrier in it, it is OK to duplicate
it for the unroll.

llvm-svn: 256075
 2015-12-19 01:46:41 +00:00
Matt Arsenault 5c004a7c61 AMDGPU: Fix dropping mem operands when moving to VALU 
Without a memory operand, mayLoad or mayStore instructions
are treated as hasUnorderedMemRef, which results in much worse
scheduling.

We really should have a verifier check that any
non-side effecting mayLoad or mayStore has a memory operand.
There are a few instructions (interp and images) which I'm
not sure what / where to add these.

llvm-svn: 246356
 2015-08-29 06:48:46 +00:00