findImplicitExecSrc -> findSetInactiveMask

Author: perlfu

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

@@ -2098,7 +2098,9 @@ unsigned SIInstrInfo::getNumWaitStates(const MachineInstr &MI) {
   }
 }
 
-Register SIInstrInfo::findImplicitExecSrc(const MachineInstr &MI) {
+Register SIInstrInfo::findSetInactiveMask(const MachineInstr &MI) {
+  assert(MI.getOpcode() == AMDGPU::V_SET_INACTIVE_B32 ||
+         MI.getOpcode() == AMDGPU::V_SET_INACTIVE_B64);
   for (auto &Op : MI.implicit_operands()) {
     if (Op.isDef())
       continue;
@@ -2298,7 +2300,7 @@ bool SIInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
     MachineOperand &InactiveSrc = MI.getOperand(2);
 
     // Find implicit register defining lanes active outside WWM.
-    Register ExecSrcReg = findImplicitExecSrc(MI);
+    Register ExecSrcReg = findSetInactiveMask(MI);
     assert(ExecSrcReg && "V_SET_INACTIVE must be in known WWM region");
     // Note: default here is set to ExecReg so that functional MIR is still
     // generated if implicit def is not found and assertions are disabled.

llvm/lib/Target/AMDGPU/SIInstrInfo.h

@@ -1438,7 +1438,7 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
   // regardless.
   void enforceOperandRCAlignment(MachineInstr &MI, unsigned OpName) const;
 
-  static Register findImplicitExecSrc(const MachineInstr &MI);
+  static Register findSetInactiveMask(const MachineInstr &MI);
 };
 
 /// \brief Returns true if a reg:subreg pair P has a TRC class

llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp

@@ -562,7 +562,7 @@ char SIWholeQuadMode::scanInstructions(MachineFunction &MF,
         // Ignore these if V_SET_INACTIVE which already has exec src register.
         // These are generated by an earlier pass which has seperately ensured
         // WWM and provided a mask of inactive lanes.
-        Register ExecSrc = TII->findImplicitExecSrc(MI);
+        Register ExecSrc = TII->findSetInactiveMask(MI);
         if (!ExecSrc) {
           // Disable strict states; StrictWQM will be added as required later.
           III.Disabled = StateStrict;