6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-23 01:24:30 +00:00
Code Issues Projects Releases Wiki Activity

implement mc asmparser support for '.', which gets the

Browse Source 
current PC.  rdar://7834775

We now produce an identical .o file compared to the cctools
assembler for something like this:

_f0:
L0:
        jmp L1
        .long . - L0
L1:
        jmp A
        .long . - L1

        .zerofill __DATA,_bss,A,0



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101227 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-04-14 04:40:28 +00:00
parent ff1ef6bdf1
commit d305035155
4 changed files with 29 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
lib/MC/MCParser/AsmParser.cpp
View File

@ -209,6 +209,7 @@ MCSymbol *AsmParser::CreateSymbol(StringRef Name) {
/// primaryexpr ::= (parenexpr
/// primaryexpr ::= symbol
/// primaryexpr ::= number
/// primaryexpr ::= '.'
/// primaryexpr ::= ~,+,- primaryexpr
bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
switch (Lexer.getKind()) {
@ -253,6 +254,17 @@ bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
EndLoc = Lexer.getLoc();
Lex(); // Eat token.
return false;
case AsmToken::Dot: {
// This is a '.' reference, which references the current PC. Emit a
// temporary label to the streamer and refer to it.
MCSymbol *Sym = Ctx.CreateTempSymbol();
Out.EmitLabel(Sym);
Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext());
EndLoc = Lexer.getLoc();
Lex(); // Eat identifier.
return false;
}
case AsmToken::LParen:
Lex(); // Eat the '('.
return ParseParenExpr(Res, EndLoc);