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

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``````````bash
git-clang-format --diff a90e215dfbc99803b30904c521ac375ebe0ea271 d412c141417f1d0434b4e2627aca0d82e6255106 -- llvm/lib/Target/X86/X86InstrFoldTables.cpp llvm/utils/TableGen/X86FoldTablesEmitter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/utils/TableGen/X86FoldTablesEmitter.cpp b/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
index 010240b18a..e0dce96906 100644
--- a/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
+++ b/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
@@ -625,7 +625,8 @@ void X86FoldTablesEmitter::run(raw_ostream &O) {
     std::vector<const CodeGenInstruction *> &OpcRegInsts = RegInstsIt->second;
 
     // Memory fold tables
-    auto Match = find_if(OpcRegInsts, IsMatch(MemInst, /*IsBroadcast=*/false, Variant));
+    auto Match =
+        find_if(OpcRegInsts, IsMatch(MemInst, /*IsBroadcast=*/false, Variant));
     if (Match != OpcRegInsts.end()) {
       updateTables(FixUp(*Match), MemInst);
       OpcRegInsts.erase(Match);
@@ -636,9 +637,12 @@ void X86FoldTablesEmitter::run(raw_ostream &O) {
     if (MemInstName.contains("mb"))
       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));
+    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,
                    /*IsBroadcast=*/true);
@@ -677,11 +681,11 @@ void X86FoldTablesEmitter::run(raw_ostream &O) {
   PRINT_TABLE(Table2)
   PRINT_TABLE(Table3)
   PRINT_TABLE(Table4)
-  //PRINT_TABLE(BroadcastTable0)
-  //PRINT_TABLE(BroadcastTable1)
+  // PRINT_TABLE(BroadcastTable0)
+  // PRINT_TABLE(BroadcastTable1)
   PRINT_TABLE(BroadcastTable2)
   PRINT_TABLE(BroadcastTable3)
-  //PRINT_TABLE(BroadcastTable4)
+  // PRINT_TABLE(BroadcastTable4)
 }
 
 static TableGen::Emitter::OptClass<X86FoldTablesEmitter>

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