[llvm] [MC] Teach checkAsmTiedOperandConstraints about optional operands (PR #81381)

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``````````bash
git-clang-format --diff 2a51c56d8e0e410bf896be2c6bebe37344a996e1 22bada0f96087f0e54dcfeadd4938f408af81949 -- llvm/utils/TableGen/AsmMatcherEmitter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index bd4a5dab17..c11c6d4d3c 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -3042,11 +3042,11 @@ static void emitAsmTiedOperandConstraints(CodeGenTarget &Target,
   OS << "  const uint8_t *Converter = ConversionTable[Kind];\n";
   if (HasOptionalOperands) {
     OS << "  unsigned DefaultsOffset[" << (MaxNumOperands + 1)
-          << "] = { 0 };\n";
+       << "] = { 0 };\n";
     OS << "  assert(OptionalOperandsMask.size() == " << (MaxNumOperands)
-          << ");\n";
+       << ");\n";
     OS << "  for (unsigned i = 0, NumDefaults = 0; i < " << (MaxNumOperands)
-          << "; ++i) {\n";
+       << "; ++i) {\n";
     OS << "    DefaultsOffset[i + 1] = NumDefaults;\n";
     OS << "    NumDefaults += (OptionalOperandsMask[i] ? 1 : 0);\n";
     OS << "  }\n";

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https://github.com/llvm/llvm-project/pull/81381