[PATCH] D81914: [AMDGPU] Avoid use of V_READLANE into EXEC in SGPR spills

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/SIInstrInfo.cpp:7034-7035
+    for (unsigned i = 0; i < 2; ++i) {
+      Register DstReg = MI.getOperand(i % 2).getReg();
+      Register SrcReg = MI.getOperand((i + 1) % 2).getReg();
+      if (SrcReg.isVirtual()) {
----------------
This is now way more complicated. You shouldn't need to loop, or consider specific physical registers. You should be apply to just change the register classes that were used here


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D81914/new/

https://reviews.llvm.org/D81914