Added llvm-mc support for parsing the .abort directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75545 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-mc/AsmParser.cpp

@@ -529,6 +529,8 @@ bool AsmParser::ParseStatement() {
 
     if (!strcmp(IDVal, ".subsections_via_symbols"))
       return ParseDirectiveDarwinSubsectionsViaSymbols();
+    if (!strcmp(IDVal, ".abort"))
+      return ParseDirectiveAbort();
 
     Warning(IDLoc, "ignoring directive for now");
     EatToEndOfStatement();
@@ -1068,3 +1070,26 @@ bool AsmParser::ParseDirectiveDarwinSubsectionsViaSymbols() {
 
   return false;
 }
+
+/// ParseDirectiveAbort
+///  ::= .abort [ "abort_string" ]
+bool AsmParser::ParseDirectiveAbort() {
+  const char *Str = NULL;
+  if (Lexer.isNot(asmtok::EndOfStatement)) {
+    if (Lexer.isNot(asmtok::String))
+      return TokError("expected string in '.abort' directive");
+    
+    Str = Lexer.getCurStrVal();
+
+    Lexer.Lex();
+  }
+
+  if (Lexer.isNot(asmtok::EndOfStatement))
+    return TokError("unexpected token in '.abort' directive");
+  
+  Lexer.Lex();
+
+  Out.AbortAssembly(Str);
+
+  return false;
+}

tools/llvm-mc/AsmParser.h

@@ -115,6 +115,8 @@ private:
 
   // Darwin specific ".subsections_via_symbols"
   bool ParseDirectiveDarwinSubsectionsViaSymbols();
+
+  bool ParseDirectiveAbort(); // ".abort"
 };
 
 } // end namespace llvm