[PATCH] D17305: AMDGPU/SI: Use v_readfirstlane to legalize SMRD with VGPR base pointer

[Changpeng Fang via llvm-commits]

cfang added a comment.

A good approach. Can we use v_readfirstlane for some other cases in SIFixSGPRCopies? There might be optimization choice which
approaches are better.


http://reviews.llvm.org/D17305