[PATCH] D86541: [AMDGPU] Preserve vcc_lo when shrinking V_CNDMASK

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/SIInstrInfo.cpp:3475-3480
+      if (Src2->getReg() == AMDGPU::VCC_LO) {
+        for (auto &Use : Inst32->implicit_operands()) {
+          if (Use.isUse() && Use.getReg() == AMDGPU::VCC)
+            Use.setReg(AMDGPU::VCC_LO);
+        }
+      }
----------------
We have  SIInstrInfo::fixImplicitOperands for this


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D86541/new/

https://reviews.llvm.org/D86541