[AMDGPU] Remove materializeImmediate (llvm#127420)

The lase use was removed in:

  commit cbf34a5
  Author: Juan Manuel Martinez Caamaño <[email protected]>
  Date:   Fri Aug 23 14:06:17 2024 +0200

Author: kazutakahirata

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

@@ -1171,62 +1171,6 @@ int SIInstrInfo::commuteOpcode(unsigned Opcode) const {
   return Opcode;
 }
 
-void SIInstrInfo::materializeImmediate(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator MI,
-                                       const DebugLoc &DL, Register DestReg,
-                                       int64_t Value) const {
-  MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
-  const TargetRegisterClass *RegClass = MRI.getRegClass(DestReg);
-  if (RegClass == &AMDGPU::SReg_32RegClass ||
-      RegClass == &AMDGPU::SGPR_32RegClass ||
-      RegClass == &AMDGPU::SReg_32_XM0RegClass ||
-      RegClass == &AMDGPU::SReg_32_XM0_XEXECRegClass) {
-    BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B32), DestReg)
-      .addImm(Value);
-    return;
-  }
-
-  if (RegClass == &AMDGPU::SReg_64RegClass ||
-      RegClass == &AMDGPU::SGPR_64RegClass ||
-      RegClass == &AMDGPU::SReg_64_XEXECRegClass) {
-    BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B64), DestReg)
-      .addImm(Value);
-    return;
-  }
-
-  if (RegClass == &AMDGPU::VGPR_32RegClass) {
-    BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DestReg)
-      .addImm(Value);
-    return;
-  }
-  if (RegClass->hasSuperClassEq(&AMDGPU::VReg_64RegClass)) {
-    BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B64_PSEUDO), DestReg)
-      .addImm(Value);
-    return;
-  }
-
-  unsigned EltSize = 4;
-  unsigned Opcode = AMDGPU::V_MOV_B32_e32;
-  if (RI.isSGPRClass(RegClass)) {
-    if (RI.getRegSizeInBits(*RegClass) > 32) {
-      Opcode =  AMDGPU::S_MOV_B64;
-      EltSize = 8;
-    } else {
-      Opcode = AMDGPU::S_MOV_B32;
-      EltSize = 4;
-    }
-  }
-
-  ArrayRef<int16_t> SubIndices = RI.getRegSplitParts(RegClass, EltSize);
-  for (unsigned Idx = 0; Idx < SubIndices.size(); ++Idx) {
-    int64_t IdxValue = Idx == 0 ? Value : 0;
-
-    MachineInstrBuilder Builder = BuildMI(MBB, MI, DL,
-      get(Opcode), RI.getSubReg(DestReg, SubIndices[Idx]));
-    Builder.addImm(IdxValue);
-  }
-}
-
 const TargetRegisterClass *
 SIInstrInfo::getPreferredSelectRegClass(unsigned Size) const {
   return &AMDGPU::VGPR_32RegClass;

llvm/lib/Target/AMDGPU/SIInstrInfo.h

@@ -267,10 +267,6 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
-  void materializeImmediate(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MI, const DebugLoc &DL,
-                            Register DestReg, int64_t Value) const;
-
   const TargetRegisterClass *getPreferredSelectRegClass(
                                unsigned Size) const;