Tom Stellard 8a72c73032 R600/SI: Fixup CopyToReg register class in PostprocessISelDAG()
The CopyToReg nodes will sometimes try to copy a value from a VGPR to an
SGPR.  This kind of copy is not possible, so we need to detect
VGPR->SGPR copies and do something else.  The current strategy is to
replace these copies with VGPR->VGPR copies and hope that all the users
of CopyToReg can accept VGPRs as arguments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183132 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-03 17:39:46 +00:00
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