tree 33b3712ec7c13b12111df5ebffd301c7aa7b4357
parent b1407138d45ba368aefd73f33ecb25f09432531a
author Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> 1571685927 +0000
committer Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> 1571685927 +0000

[AMDGPU] Select AGPR in PHI operand legalization

If a PHI defines AGPR legalize its operands to AGPR.
At the moment we can get an AGPR PHI with VGPR operands.
I am not aware of any problems as it seems to be handled
gracefully in RA, but this is not right anyway.

It also slightly decreases VGPR pressure in some cases
because we do not have to a copy via VGPR.

Differential Revision: https://reviews.llvm.org/D69206

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375446 91177308-0d34-0410-b5e6-96231b3b80d8