True16 codegen pattern for v_pack_b32_f16

Author: broxigarchen

llvm/lib/Target/AMDGPU/SIInstructions.td

@@ -3390,6 +3390,9 @@ let SubtargetPredicate = isGFX9Plus in {
 let True16Predicate = NotHasTrue16BitInsts in
   def : PackB32Pat<V_PACK_B32_F16_e64>;
 
+let True16Predicate = UseRealTrue16Insts in
+  def : PackB32Pat<V_PACK_B32_F16_t16_e64>;
+
 let True16Predicate = UseFakeTrue16Insts in
   def : PackB32Pat<V_PACK_B32_F16_fake16_e64>;
 } // End SubtargetPredicate = isGFX9Plus