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author | Saleem Abdulrasool <compnerd@compnerd.org> | 2013-12-18 02:53:03 +0000 |
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committer | Saleem Abdulrasool <compnerd@compnerd.org> | 2013-12-18 02:53:03 +0000 |
commit | 5a445395de7a5481ed8a5d1768aa9e3db83bd18a (patch) | |
tree | af6fc533654e1afecb6a3a16556a05e522011867 /lib/MC/MCParser | |
parent | 2cb3295a536957f0a191660a692e84e4102054a6 (diff) | |
download | llvm-5a445395de7a5481ed8a5d1768aa9e3db83bd18a.tar.gz llvm-5a445395de7a5481ed8a5d1768aa9e3db83bd18a.tar.bz2 llvm-5a445395de7a5481ed8a5d1768aa9e3db83bd18a.tar.xz |
AsmParser: add support for .end directive
The .end directive indicates the end of the file. No further instructions are
processed after a .end directive is encountered.
One potential (glaringly obvious) optimisation that could be pursued here is to
extend MCAsmParser with a DiscardRemainder method to avoid processing lexemes to
the end of the file. It was unclear at this point if that would be worth
adding, and could easily be added in a follow on change.
Signed-off-by: Saleem Abdulrasool <compnerd@compnerd.org>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197547 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/MC/MCParser')
-rw-r--r-- | lib/MC/MCParser/AsmParser.cpp | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp index a336cb97c6..35f38a2a87 100644 --- a/lib/MC/MCParser/AsmParser.cpp +++ b/lib/MC/MCParser/AsmParser.cpp @@ -358,7 +358,8 @@ private: DK_CFI_RESTORE, DK_CFI_ESCAPE, DK_CFI_SIGNAL_FRAME, DK_CFI_UNDEFINED, DK_CFI_REGISTER, DK_CFI_WINDOW_SAVE, DK_MACROS_ON, DK_MACROS_OFF, DK_MACRO, DK_ENDM, DK_ENDMACRO, DK_PURGEM, - DK_SLEB128, DK_ULEB128 + DK_SLEB128, DK_ULEB128, + DK_END }; /// \brief Maps directive name --> DirectiveKind enum, for @@ -464,6 +465,9 @@ private: // "align" bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); + // "end" + bool parseDirectiveEnd(SMLoc DirectiveLoc); + void initializeDirectiveKindMap(); }; } @@ -1508,6 +1512,8 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info) { return parseDirectiveEndMacro(IDVal); case DK_PURGEM: return parseDirectivePurgeMacro(IDLoc); + case DK_END: + return parseDirectiveEnd(IDLoc); } return Error(IDLoc, "unknown directive"); @@ -3743,6 +3749,20 @@ bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { return false; } +/// parseDirectiveEnd +/// ::= .end +bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { + if (getLexer().isNot(AsmToken::EndOfStatement)) + return TokError("unexpected token in '.end' directive"); + + Lex(); + + while (Lexer.isNot(AsmToken::Eof)) + Lex(); + + return false; +} + /// parseDirectiveEndIf /// ::= .endif bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { @@ -3828,6 +3848,7 @@ void AsmParser::initializeDirectiveKindMap() { DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; DirectiveKindMap[".elseif"] = DK_ELSEIF; DirectiveKindMap[".else"] = DK_ELSE; + DirectiveKindMap[".end"] = DK_END; DirectiveKindMap[".endif"] = DK_ENDIF; DirectiveKindMap[".skip"] = DK_SKIP; DirectiveKindMap[".space"] = DK_SPACE; |