[llvm] [PowerPC] custom lower v1024i1 load/store (PR #126969)

[Lei Huang via llvm-commits]

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@@ -1363,6 +1363,11 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
     setOperationAction(ISD::STORE, MVT::v512i1, Custom);
     setOperationAction(ISD::BUILD_VECTOR, MVT::v512i1, Custom);
   }
+  if (Subtarget.isISAFuture()) {
+    setOperationAction(ISD::LOAD, MVT::v1024i1, Custom);
+    setOperationAction(ISD::STORE, MVT::v1024i1, Custom);
+    addRegisterClass(MVT::v1024i1, &PPC::DMRRCRegClass);
+  }
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lei137 wrote:

Should this within the `if (Subtarget.hasMMA())` block on line 1357?  I am basing this on the fact that we need `hadMMA()` for this support.

https://github.com/llvm/llvm-project/pull/126969