[clang] [llvm] [PowerPC] Add DMF builtins for build and disassemble (PR #153097)

[Maryam Moghadas via cfe-commits]

================
@@ -11292,6 +11292,25 @@ SDValue 
PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
     return DAG.getMergeValues(RetOps, dl);
   }
 
+  case Intrinsic::ppc_mma_build_dmr: {
+    SmallVector<SDValue, 8> Pairs;
+    SmallVector<SDValue, 8> Chains;
+    for (int i = 1; i < 9; i += 2) {
+      SDValue Hi = Op.getOperand(i);
+      SDValue Lo = Op.getOperand(i + 1);
+      if (Hi->getOpcode() == ISD::LOAD)
+        Chains.push_back(Hi.getValue(1));
+      if (Lo->getOpcode() == ISD::LOAD)
+        Chains.push_back(Lo.getValue(1));
+      Pairs.push_back(
+          DAG.getNode(PPCISD::PAIR_BUILD, dl, MVT::v256i1, {Hi, Lo}));
+    }
+    SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Chains);
+    SDValue Value = DMFInsert1024(Pairs, SDLoc(Op), DAG);
+    SDValue RetOps[] = {Value, TF};
+    return DAG.getMergeValues(RetOps, dl);
----------------
maryammo wrote:

nit: perhaps we could remove the tmp variables when possible
return DAG.getMergeValues({Value, TF},  dl);

https://github.com/llvm/llvm-project/pull/153097
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