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fix rdar://7946934 - in some limited cases, the assembler should

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allow $ at the start of a symbol name.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103137 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-05-05 23:51:28 +00:00
parent 29402132f3
commit 851f87c6c9
3 changed files with 24 additions and 10 deletions
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23
lib/MC/MCParser/AsmLexer.cpp
View File

@ -69,16 +69,26 @@ int AsmLexer::getNextChar() {
}
}
/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
/// LexIdentifier: [a-zA-Z_.$][a-zA-Z0-9_$.@]*
/// LexIdentifier: .
/// LexIdentifier: $
AsmToken AsmLexer::LexIdentifier() {
while (isalnum(*CurPtr) || *CurPtr == '_' || *CurPtr == '$' ||
*CurPtr == '.' || *CurPtr == '@')
++CurPtr;
// Handle . as a special case.
if (CurPtr == TokStart+1 && TokStart[0] == '.')
return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
if (CurPtr == TokStart+1)
if (TokStart[0] == '.')
return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
// Handle $ as a special case. $foo is an identifier, $42 is not.
if (TokStart[0] == '$' &&
(CurPtr-TokStart == 1 || isdigit(TokStart[1]) || TokStart[1] == '"')) {
CurPtr = TokStart+1;
return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
}
return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
}
@ -252,8 +262,8 @@ AsmToken AsmLexer::LexToken() {
switch (CurChar) {
default:
// Handle identifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
if (isalpha(CurChar) || CurChar == '_' || CurChar == '.')
// Handle identifier: [a-zA-Z_.$][a-zA-Z0-9_$.@]*
if (isalpha(CurChar) || CurChar == '_' || CurChar == '.' || CurChar == '$')
return LexIdentifier();
// Unknown character, emit an error.
@ -279,7 +289,6 @@ AsmToken AsmLexer::LexToken() {
case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
case '=':
if (*CurPtr == '=')
return ++CurPtr, AsmToken(AsmToken::EqualEqual, StringRef(TokStart, 2));

4
test/MC/AsmParser/X86/x86_operands.s
View File

@ -1,5 +1,3 @@
// FIXME: Actually test that we get the expected results.
// RUN: llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
# Immediates
@ -7,7 +5,7 @@
addl $1, %eax
# CHECK: addl $3, %eax
addl $(1+2), %eax
# CHECK: addl $a, %eax
# CHECK: addl ($a), %eax
addl $a, %eax
# CHECK: addl $3, %eax
addl $1 + 2, %eax

7
test/MC/AsmParser/labels.s
View File

@ -57,3 +57,10 @@ foo:
// CHECK: .long "a 9"
.long "a 9"
// rdar://7946934
// CHECK: .globl $abc
.globl $abc