[AsmParser] Provide target direct access to mnemonic token. Allow assignment parsing...

Differential Revision:  http://reviews.llvm.org/D14255

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252435 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/MC/MCTargetAsmParser.h b/include/llvm/MC/MCTargetAsmParser.h
index 2b857ca4b2d30d5c0aa143cfe46d2d2e137c688a..bb33dc5ed3efd6ec3a880962d4b5eacfbd80e097 100644 (file)
--- a/include/llvm/MC/MCTargetAsmParser.h
+++ b/include/llvm/MC/MCTargetAsmParser.h
@@ -143,6 +143,10 @@ public:
   /// \return True on failure.
   virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
                                 SMLoc NameLoc, OperandVector &Operands) = 0;
+  virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
+                                AsmToken Token, OperandVector &Operands) {
+    return ParseInstruction(Info, Name, Token.getLoc(), Operands);
+  }
 
   /// ParseDirective - Parse a target specific assembler directive
   ///
@@ -192,6 +196,11 @@ public:
   virtual void convertToMapAndConstraints(unsigned Kind,
                                           const OperandVector &Operands) = 0;
 
+  // Return whether this parser uses assignment statements with equals tokens
+  virtual bool equalIsAsmAssignment() { return true; };
+  // Return whether this start of statement identifier is a label
+  virtual bool isLabel(AsmToken &Token) { return true; };
+
   virtual const MCExpr *applyModifierToExpr(const MCExpr *E,
                                             MCSymbolRefExpr::VariantKind,
                                             MCContext &Ctx) {

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 8903637678061216126b21464eb011aa64bb195b..aa3489a0573f3abac22625584df0817b60490c0f 100644 (file)
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -1396,6 +1396,8 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
   // See what kind of statement we have.
   switch (Lexer.getKind()) {
   case AsmToken::Colon: {
+    if (!getTargetParser().isLabel(ID))
+      break;
     checkForValidSection();
 
     // identifier ':'   -> Label.
@@ -1454,6 +1456,8 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
   }
 
   case AsmToken::Equal:
+    if (!getTargetParser().equalIsAsmAssignment())
+      break;
     // identifier '=' ... -> assignment statement
     Lex();
 
@@ -1701,7 +1705,7 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
   // Canonicalize the opcode to lower case.
   std::string OpcodeStr = IDVal.lower();
   ParseInstructionInfo IInfo(Info.AsmRewrites);
-  bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, IDLoc,
+  bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
                                                      Info.ParsedOperands);
   Info.ParseError = HadError;