[llvm] [X86][tablgen] Auto-gen broadcast tables (PR #73654)

[Shengchen Kan via llvm-commits]

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@@ -606,11 +725,30 @@ void X86FoldTablesEmitter::run(raw_ostream &O) {
     // opcode.
     std::vector<const CodeGenInstruction *> &OpcRegInsts = RegInstsIt->second;
 
-    auto Match = find_if(OpcRegInsts, IsMatch(MemInst, Variant));
+    // Memory fold tables
+    auto Match =
+        find_if(OpcRegInsts, IsMatch(MemInst, /*IsBroadcast=*/false, Variant));
     if (Match != OpcRegInsts.end()) {
       updateTables(FixUp(*Match), MemInst);
       OpcRegInsts.erase(Match);
     }
+
+    // Broadcast tables
+    StringRef MemInstName = MemInst->TheDef->getName();
+    if (!MemInstName.contains("mb") && !MemInstName.contains("mib"))
+      continue;
+    RegInstsIt = RegInstsForBroadcast.find(Opc);
+    assert(RegInstsIt != RegInstsForBroadcast.end() &&
+           "Unexpected control flow");
+    std::vector<const CodeGenInstruction *> &OpcRegInstsForBroadcast =
+        RegInstsIt->second;
+    Match = find_if(OpcRegInstsForBroadcast,
+                    IsMatch(MemInst, /*IsBroadcast=*/true, Variant));
+    if (Match != OpcRegInstsForBroadcast.end()) {
+      updateTables(FixUp(*Match), MemInst, 0, /*IsMannual=*/false,
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KanRobert wrote:

Done

https://github.com/llvm/llvm-project/pull/73654