Move mnemonicIsValid to Mips target.

Summary:
The Mips target is the only user of mnemonicIsValid. This patch
moves this method from AsmMatcherEmitter.cpp to MipsAsmParser.cpp,
getting rid of the method in all other targets where it generated
warnings about an unused function.

Patch by Gonsolo.

Reviewers: craig.topper

Reviewed By: craig.topper

Subscribers: sdardis

Differential Revision: https://reviews.llvm.org/D28748

llvm-svn: 294400

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 3b5b3cdbed2..254175c05e1 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -169,6 +169,8 @@ class MipsAsmParser : public MCTargetAsmParser {
 
   bool parseBracketSuffix(StringRef Name, OperandVector &Operands);
 
+  bool mnemonicIsValid(StringRef Mnemonic, unsigned VariantID);
+
   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
                         SMLoc NameLoc, OperandVector &Operands) override;
 
@@ -6965,3 +6967,15 @@ extern "C" void LLVMInitializeMipsAsmParser() {
 #define GET_REGISTER_MATCHER
 #define GET_MATCHER_IMPLEMENTATION
 #include "MipsGenAsmMatcher.inc"
+
+bool MipsAsmParser::mnemonicIsValid(StringRef Mnemonic, unsigned VariantID) {
+  // Find the appropriate table for this asm variant.
+  const MatchEntry *Start, *End;
+  switch (VariantID) {
+  default: llvm_unreachable("invalid variant!");
+  case 0: Start = std::begin(MatchTable0); End = std::end(MatchTable0); break;
+  }
+  // Search the table.
+  auto MnemonicRange = std::equal_range(Start, End, Mnemonic, LessOpcode());
+  return MnemonicRange.first != MnemonicRange.second;
+}