[AsmParser][TableGen] Make the generated mnemonic spell checker function a file local static function.

Also only emit in targets that specificially request it. This is required so we don't get an unused static function error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316640 91177308-0d34-0410-b5e6-96231b3b80d8

Author: topperc

lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp

@@ -3297,7 +3297,7 @@ bool AArch64AsmParser::validateInstruction(MCInst &Inst,
   }
 }
 
-std::string AArch64MnemonicSpellCheck(StringRef S, uint64_t FBS);
+static std::string AArch64MnemonicSpellCheck(StringRef S, uint64_t FBS);
 
 bool AArch64AsmParser::showMatchError(SMLoc Loc, unsigned ErrCode,
                                       OperandVector &Operands) {
@@ -4255,6 +4255,7 @@ extern "C" void LLVMInitializeAArch64AsmParser() {
 #define GET_REGISTER_MATCHER
 #define GET_SUBTARGET_FEATURE_NAME
 #define GET_MATCHER_IMPLEMENTATION
+#define GET_MNEMONIC_SPELL_CHECKER
 #include "AArch64GenAsmMatcher.inc"
 
 // Define this matcher function after the auto-generated include so we

lib/Target/ARM/AsmParser/ARMAsmParser.cpp

@@ -9040,7 +9040,7 @@ unsigned ARMAsmParser::MatchInstruction(OperandVector &Operands, MCInst &Inst,
   return PlainMatchResult;
 }
 
-std::string ARMMnemonicSpellCheck(StringRef S, uint64_t FBS);
+static std::string ARMMnemonicSpellCheck(StringRef S, uint64_t FBS);
 
 static const char *getSubtargetFeatureName(uint64_t Val);
 bool ARMAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
@@ -10120,6 +10120,7 @@ extern "C" void LLVMInitializeARMAsmParser() {
 #define GET_REGISTER_MATCHER
 #define GET_SUBTARGET_FEATURE_NAME
 #define GET_MATCHER_IMPLEMENTATION
+#define GET_MNEMONIC_SPELL_CHECKER
 #include "ARMGenAsmMatcher.inc"
 
 // Some diagnostics need to vary with subtarget features, so they are handled

lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp

@@ -543,6 +543,7 @@ class SystemZAsmParser : public MCTargetAsmParser {
 #define GET_REGISTER_MATCHER
 #define GET_SUBTARGET_FEATURE_NAME
 #define GET_MATCHER_IMPLEMENTATION
+#define GET_MNEMONIC_SPELL_CHECKER
 #include "SystemZGenAsmMatcher.inc"
 
 // Used for the .insn directives; contains information needed to parse the
@@ -1168,7 +1169,7 @@ bool SystemZAsmParser::parseOperand(OperandVector &Operands,
   return false;
 }
 
-std::string SystemZMnemonicSpellCheck(StringRef S, uint64_t FBS);
+static std::string SystemZMnemonicSpellCheck(StringRef S, uint64_t FBS);
 
 bool SystemZAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                                                OperandVector &Operands,

utils/TableGen/AsmMatcherEmitter.cpp

@@ -2823,7 +2823,8 @@ static void emitCustomOperandParsing(raw_ostream &OS, CodeGenTarget &Target,
 
 static void emitMnemonicSpellChecker(raw_ostream &OS, CodeGenTarget &Target,
                                      unsigned VariantCount) {
-  OS << "std::string " << Target.getName() << "MnemonicSpellCheck(StringRef S, uint64_t FBS) {\n";
+  OS << "static std::string " << Target.getName()
+     << "MnemonicSpellCheck(StringRef S, uint64_t FBS) {\n";
   if (!VariantCount)
     OS <<  "  return \"\";";
   else {
@@ -3159,8 +3160,6 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
     OS << "};\n\n";
   }
 
-  emitMnemonicSpellChecker(OS, Target, VariantCount);
-
   OS << "#include \"llvm/Support/Debug.h\"\n";
   OS << "#include \"llvm/Support/Format.h\"\n\n";
 
@@ -3576,6 +3575,13 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
                              MaxMnemonicIndex, HasMnemonicFirst);
 
   OS << "#endif // GET_MATCHER_IMPLEMENTATION\n\n";
+
+  OS << "\n#ifdef GET_MNEMONIC_SPELL_CHECKER\n";
+  OS << "#undef GET_MNEMONIC_SPELL_CHECKER\n\n";
+
+  emitMnemonicSpellChecker(OS, Target, VariantCount);
+
+  OS << "#endif // GET_MNEMONIC_SPELL_CHECKER\n\n";
 }
 
 namespace llvm {