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PR8951: Support for .equiv in integrated assembler, patch by Jörg Sonnenberger!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124467 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nico Weber 2011-01-28 03:04:41 +00:00
parent 40f64cb0de
commit 4c4c732960
2 changed files with 21 additions and 8 deletions
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20
lib/MC/MCParser/AsmParser.cpp
View File

@ -168,7 +168,7 @@ private:
/// will be either the EndOfStatement or EOF.
StringRef ParseStringToEndOfStatement();
bool ParseAssignment(StringRef Name);
bool ParseAssignment(StringRef Name, bool allow_redef);
bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
@ -187,7 +187,7 @@ private:
bool ParseDirectiveFill(); // ".fill"
bool ParseDirectiveSpace(); // ".space"
bool ParseDirectiveZero(); // ".zero"
bool ParseDirectiveSet(StringRef IDVal); // ".set" or ".equ"
bool ParseDirectiveSet(StringRef IDVal, bool allow_redef); // ".set", ".equ", ".equiv"
bool ParseDirectiveOrg(); // ".org"
// ".align{,32}", ".p2align{,w,l}"
bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize);
@ -941,7 +941,7 @@ bool AsmParser::ParseStatement() {
// identifier '=' ... -> assignment statement
Lex();
return ParseAssignment(IDVal);
return ParseAssignment(IDVal, true);
default: // Normal instruction or directive.
break;
@ -956,7 +956,9 @@ bool AsmParser::ParseStatement() {
if (IDVal[0] == '.') {
// Assembler features
if (IDVal == ".set" || IDVal == ".equ")
return ParseDirectiveSet(IDVal);
return ParseDirectiveSet(IDVal, true);
if (IDVal == ".equiv")
return ParseDirectiveSet(IDVal, false);
// Data directives
@ -1263,7 +1265,7 @@ static void MarkUsed(const MCExpr *Value) {
}
}
bool AsmParser::ParseAssignment(StringRef Name) {
bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
// FIXME: Use better location, we should use proper tokens.
SMLoc EqualLoc = Lexer.getLoc();
@ -1289,7 +1291,7 @@ bool AsmParser::ParseAssignment(StringRef Name) {
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
; // Allow redefinitions of undefined symbols only used in directives.
else if (!Sym->isUndefined() && !Sym->isAbsolute())
else if (!Sym->isUndefined() && (!Sym->isAbsolute() || !allow_redef))
return Error(EqualLoc, "redefinition of '" + Name + "'");
else if (!Sym->isVariable())
return Error(EqualLoc, "invalid assignment to '" + Name + "'");
@ -1350,8 +1352,10 @@ bool AsmParser::ParseIdentifier(StringRef &Res) {
}
/// ParseDirectiveSet:
/// ::= .equ identifier ',' expression
/// ::= .equiv identifier ',' expression
/// ::= .set identifier ',' expression
bool AsmParser::ParseDirectiveSet(StringRef IDVal) {
bool AsmParser::ParseDirectiveSet(StringRef IDVal, bool allow_redef) {
StringRef Name;
if (ParseIdentifier(Name))
@ -1361,7 +1365,7 @@ bool AsmParser::ParseDirectiveSet(StringRef IDVal) {
return TokError("unexpected token in '" + Twine(IDVal) + "'");
Lex();
return ParseAssignment(Name);
return ParseAssignment(Name, allow_redef);
}
bool AsmParser::ParseEscapedString(std::string &Data) {

9
test/MC/AsmParser/equ.s Normal file
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@ -0,0 +1,9 @@
// RUN: not llvm-mc -n -triple i386-unknown-unknown %s 2> %t
// RUN: FileCheck < %t %s
.equ a, 0
.set a, 1
.equ a, 2
.equiv a, 3
// CHECK: error: redefinition of 'a'