address PR

Author: broxigarchen

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

@@ -5882,8 +5882,8 @@ AMDGPUInstructionSelector::selectVOP3PMadMixModsImpl(MachineOperand &Root,
     // 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))))
+    if (mi_match(PeekSrc, *MRI, m_GTrunc(m_Reg(PeekSrc))) &&
+        MRI->getType(PeekSrc).getSizeInBits() == 32)
       Src = PeekSrc;
 
     Matched = true;