gisel update for icmp

Author: broxigarchen

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

@@ -1478,10 +1478,17 @@ bool AMDGPUInstructionSelector::selectG_ICMP_or_FCMP(MachineInstr &I) const {
   if (Opcode == -1)
     return false;
 
-  MachineInstr *ICmp = BuildMI(*BB, &I, DL, TII.get(Opcode),
-            I.getOperand(0).getReg())
-            .add(I.getOperand(2))
-            .add(I.getOperand(3));
+  MachineInstrBuilder ICmp =
+      BuildMI(*BB, &I, DL, TII.get(Opcode), I.getOperand(0).getReg());
+  if (AMDGPU::hasNamedOperand(Opcode, AMDGPU::OpName::src0_modifiers))
+    ICmp.addImm(0);
+  ICmp.add(I.getOperand(2));
+  if (AMDGPU::hasNamedOperand(Opcode, AMDGPU::OpName::src1_modifiers))
+    ICmp.addImm(0);
+  ICmp.add(I.getOperand(3));
+  if (AMDGPU::hasNamedOperand(Opcode, AMDGPU::OpName::op_sel))
+    ICmp.addImm(0); // op_sel
+
   RBI.constrainGenericRegister(ICmp->getOperand(0).getReg(),
                                *TRI.getBoolRC(), *MRI);
   bool Ret = constrainSelectedInstRegOperands(*ICmp, TII, TRI, RBI);
@@ -4597,6 +4604,7 @@ AMDGPUInstructionSelector::selectVOP3OpSelMods(MachineOperand &Root) const {
   }};
 }
 
+// FIXME-TRUE16 remove when fake16 is removed
 InstructionSelector::ComplexRendererFns
 AMDGPUInstructionSelector::selectVINTERPMods(MachineOperand &Root) const {
   Register Src;