[AMDGPU] Propagate Constants for Wave Reduction Intrinsics (#150395)

Author: easyonaadit

llvm/lib/Analysis/ConstantFolding.cpp

@@ -1652,6 +1652,13 @@ bool llvm::canConstantFoldCallTo(const CallBase *Call, const Function *F) {
   case Intrinsic::amdgcn_perm:
   case Intrinsic::amdgcn_wave_reduce_umin:
   case Intrinsic::amdgcn_wave_reduce_umax:
+  case Intrinsic::amdgcn_wave_reduce_max:
+  case Intrinsic::amdgcn_wave_reduce_min:
+  case Intrinsic::amdgcn_wave_reduce_add:
+  case Intrinsic::amdgcn_wave_reduce_sub:
+  case Intrinsic::amdgcn_wave_reduce_and:
+  case Intrinsic::amdgcn_wave_reduce_or:
+  case Intrinsic::amdgcn_wave_reduce_xor:
   case Intrinsic::amdgcn_s_wqm:
   case Intrinsic::amdgcn_s_quadmask:
   case Intrinsic::amdgcn_s_bitreplicate:
@@ -3672,6 +3679,13 @@ static Constant *ConstantFoldIntrinsicCall2(Intrinsic::ID IntrinsicID, Type *Ty,
       return ConstantInt::get(Ty, C0->abs());
     case Intrinsic::amdgcn_wave_reduce_umin:
     case Intrinsic::amdgcn_wave_reduce_umax:
+    case Intrinsic::amdgcn_wave_reduce_max:
+    case Intrinsic::amdgcn_wave_reduce_min:
+    case Intrinsic::amdgcn_wave_reduce_add:
+    case Intrinsic::amdgcn_wave_reduce_sub:
+    case Intrinsic::amdgcn_wave_reduce_and:
+    case Intrinsic::amdgcn_wave_reduce_or:
+    case Intrinsic::amdgcn_wave_reduce_xor:
       return dyn_cast<Constant>(Operands[0]);
     }