[clang] [llvm] [X86][AMX] Support AMX-MOVRS (PR #115151)

[Phoebe Wang via cfe-commits]

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@@ -558,6 +558,15 @@ bool X86ExpandPseudo::expandMI(MachineBasicBlock &MBB,
     MI.setDesc(TII->get(GET_EGPR_IF_ENABLED(X86::LDTILECFG)));
     return true;
   }
+  case X86::PTILELOADDRSV:
+  case X86::PTILELOADDRST1V: {
+    for (unsigned i = 2; i > 0; --i)
+      MI.removeOperand(i);
+    unsigned Opc =
+        Opcode == X86::PTILELOADDRSV ? X86::TILELOADDRS : X86::TILELOADDRST1;
+    MI.setDesc(TII->get(Opc));
+    return true;
+  }
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phoebewang wrote:

Rebase and merge with `X86::PTILELOADDV`

https://github.com/llvm/llvm-project/pull/115151