[clang] [llvm] [Clang][RISCV][P-ext] Add Packed Widening Multiply Accumulate intrinsics (PR #226505)

[Craig Topper via cfe-commits]

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@@ -13550,6 +13563,45 @@ SDValue RISCVTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
 
     return DAG.getNode(Opc, DL, VT, Rs1, Rs2);
   }
+  case Intrinsic::riscv_pwmacc_i32x2:
+  case Intrinsic::riscv_pwmaccu_u32x2:
+  case Intrinsic::riscv_pwmaccsu_i32x2: {
+    EVT VT = Op.getValueType();
+    SDValue Acc = Op.getOperand(1);
+    SDValue Rs1 = Op.getOperand(2);
+    SDValue Rs2 = Op.getOperand(3);
+    MVT XLenVT = Subtarget.getXLenVT();
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topperc wrote:

There's already an XLenVT variable in scope at the start of this function.

https://github.com/llvm/llvm-project/pull/226505