address PR

Author: broxigarchen

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

@@ -3663,7 +3663,7 @@ bool AMDGPUDAGToDAGISel::SelectVOP3PMadMixModsImpl(SDValue In, SDValue &Src,
 
     // Prevent unnecessary subreg COPY to VGPR_16
     if (Src.getOpcode() == ISD::TRUNCATE &&
-        Src.getOperand(0).getValueType().getSizeInBits() == 32) {
+        Src.getOperand(0).getValueType() == MVT::i32) {
       Src = Src.getOperand(0);
     }
     return true;

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

@@ -5871,14 +5871,6 @@ AMDGPUInstructionSelector::selectVOP3PMadMixModsImpl(MachineOperand &Root,
       CheckAbsNeg();
     }
 
-    // Since we looked through FPEXT and removed it, we must also remove
-    // G_TRUNC. G_TRUNC to 16-bits would have a destination in RC VGPR_16, which
-    // is not compatible with MadMix instructions
-    Register PeekSrc = Src;
-    if (Subtarget->useRealTrue16Insts() &&
-        mi_match(PeekSrc, *MRI, m_GTrunc(m_Reg(PeekSrc))))
-      Src = PeekSrc;
-
     Matched = true;
   }