diff options
Diffstat (limited to 'lib/MC')
| -rw-r--r-- | lib/MC/MCParser/AsmParser.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp index e5af357..0df839b 100644 --- a/lib/MC/MCParser/AsmParser.cpp +++ b/lib/MC/MCParser/AsmParser.cpp @@ -189,6 +189,9 @@ bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { std::pair<StringRef, StringRef> Split = getTok().getIdentifier().split('@'); MCSymbol *Sym = CreateSymbol(Split.first); + // Mark the symbol as used in an expression. + Sym->setUsedInExpr(true); + // Lookup the symbol variant if used. MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; if (Split.first.size() != getTok().getIdentifier().size()) @@ -788,7 +791,9 @@ bool AsmParser::ParseAssignment(const StringRef &Name) { // // FIXME: Diagnostics. Note the location of the definition as a label. // FIXME: Diagnose assignment to protected identifier (e.g., register name). - if (!Sym->isUndefined() && !Sym->isAbsolute()) + if (Sym->isUndefined() && !Sym->isUsedInExpr()) + ; // Allow redefinitions of undefined symbols only used in directives. + else if (!Sym->isUndefined() && !Sym->isAbsolute()) return Error(EqualLoc, "redefinition of '" + Name + "'"); else if (!Sym->isVariable()) return Error(EqualLoc, "invalid assignment to '" + Name + "'"); @@ -800,6 +805,8 @@ bool AsmParser::ParseAssignment(const StringRef &Name) { // FIXME: Handle '.'. + Sym->setUsedInExpr(true); + // Do the assignment. Out.EmitAssignment(Sym, Value); |