[PATCH] D139673: [AMDGPU][SIFrameLowering] Mark VGPR used for AGPR spills as reserved

[Matt Arsenault via Phabricator via llvm-commits]

arsenm requested changes to this revision.
arsenm added inline comments.
This revision now requires changes to proceed.


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Comment at: llvm/lib/Target/AMDGPU/SIFrameLowering.cpp:1170
 
+    MRI.freezeReservedRegs(MF);
+
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Can you only do this if we actually needed to do an allocation? It's actually pretty expensive to recompute this and we do it a few too many times as it is already


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  https://reviews.llvm.org/D139673/new/

https://reviews.llvm.org/D139673