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fix MCSymbol printing to exactly match the normal mangler rules so 

we can diff .s files.

llvm-svn: 80894
This commit is contained in:
Chris Lattner 2009-09-03 05:57:47 +00:00
parent 7a53b96394
commit 1945453843
1 changed files with 23 additions and 19 deletions
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42
llvm/lib/MC/MCSymbol.cpp
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@ -8,41 +8,45 @@
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
// Sentinel value for the absolute pseudo section.
const MCSection *MCSymbol::AbsolutePseudoSection =
reinterpret_cast<const MCSection *>(1);
/// NeedsQuoting - Return true if the string \arg Str needs quoting, i.e., it
/// does not match [a-zA-Z_.][a-zA-Z0-9_.]*.
//
// FIXME: This could be more permissive, do we care?
static inline bool NeedsQuoting(const StringRef &Str) {
/// ShouldQuoteIdentifier - Return true if the identifier \arg Str needs quotes
/// for this assembler.
static bool ShouldQuoteIdentifier(const StringRef &Str, const MCAsmInfo &MAI) {
// If the assembler doesn't support quotes, never use them.
if (!MAI.doesAllowQuotesInName())
return false;
// If empty, we need quotes.
if (Str.empty())
return true;
// Check that first character is in [a-zA-Z_.].
if (!((Str[0] >= 'a' && Str[0] <= 'z') ||
(Str[0] >= 'A' && Str[0] <= 'Z') ||
(Str[0] == '_' || Str[0] == '.')))
// If the first character is a number, we need quotes.
if (Str[0] >= '0' && Str[0] <= '9')
return true;
// Check subsequent characters are in [a-zA-Z0-9_.].
for (unsigned i = 1, e = Str.size(); i != e; ++i)
if (!((Str[i] >= 'a' && Str[i] <= 'z') ||
(Str[i] >= 'A' && Str[i] <= 'Z') ||
(Str[i] >= '0' && Str[i] <= '9') ||
(Str[i] == '_' || Str[i] == '.')))
// If any of the characters in the string is an unacceptable character, force
// quotes.
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
char C = Str[i];
if ((C < 'a' || C > 'z') &&
(C < 'A' || C > 'Z') &&
(C < '0' || C > '9') &&
C != '_' && C != '$' && C != '.')
return true;
}
return false;
}
void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
if (NeedsQuoting(getName()))
if (!MAI || ShouldQuoteIdentifier(getName(), *MAI))
OS << '"' << getName() << '"';
else
OS << getName();