6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-21 16:24:47 +00:00
Code Issues Projects Releases Wiki Activity

Allow per-character control over what target assemblers allow in symbol

Browse Source 
names.  This also changes the default to allow all of "$_." in addition
to letters and numbers as symbol names.  If you don't want this, use
markCharUnacceptable to remove one of these or markCharAcceptable to add
to the set.  This corresponds with what GAS accepts by default.

Also, this includes some minor speedups


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24293 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-11-10 21:40:01 +00:00
parent ba9c6434b9
commit 91150e5d46
1 changed files with 25 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
lib/VMCore/Mangler.cpp
View File

@ -22,7 +22,8 @@ static char HexDigit(int V) {
}
static std::string MangleLetter(unsigned char C) {
return std::string("_")+HexDigit(C >> 4) + HexDigit(C & 15) + "_";
char Result[] = { '_', HexDigit(C >> 4), HexDigit(C & 15), '_', 0 };
return Result;
}
/// makeNameProper - We don't want identifier names non-C-identifier characters
@ -30,6 +31,7 @@ static std::string MangleLetter(unsigned char C) {
///
std::string Mangler::makeNameProper(const std::string &X, const char *Prefix) {
std::string Result;
if (X.empty()) return X; // Empty names are uniqued by the caller.
if (!UseQuotes) {
// If X does not start with (char)1, add the prefix.
@ -39,16 +41,16 @@ std::string Mangler::makeNameProper(const std::string &X, const char *Prefix) {
else
++I; // Skip over the marker.
// Mangle the first letter specially, don't allow numbers...
// Mangle the first letter specially, don't allow numbers.
if (*I >= '0' && *I <= '9')
Result += MangleLetter(*I++);
for (std::string::const_iterator E = X.end(); I != E; ++I)
if ((*I < 'a' || *I > 'z') && (*I < 'A' || *I > 'Z') &&
(*I < '0' || *I > '9') && *I != '_' && *I != '$')
for (std::string::const_iterator E = X.end(); I != E; ++I) {
if (!isCharAcceptable(*I))
Result += MangleLetter(*I);
else
Result += *I;
}
} else {
bool NeedsQuotes = false;
@ -67,8 +69,7 @@ std::string Mangler::makeNameProper(const std::string &X, const char *Prefix) {
if (*I == '"')
Result += "_QQ_";
else {
if ((*I < 'a' || *I > 'z') && (*I < 'A' || *I > 'Z') &&
(*I < '0' || *I > '9') && *I != '_' && *I != '$' && *I != '.')
if (!isCharAcceptable(*I))
NeedsQuotes = true;
Result += *I;
}
@ -147,6 +148,23 @@ void Mangler::InsertName(GlobalValue *GV,
Mangler::Mangler(Module &M, const char *prefix)
: Prefix(prefix), UseQuotes(false), Count(0), TypeCounter(0) {
std::fill(AcceptableChars,
AcceptableChars+sizeof(AcceptableChars)/sizeof(AcceptableChars[0]),
0);
// Letters and numbers are acceptable.
for (unsigned char X = 'a'; X <= 'z'; ++X)
markCharAcceptable(X);
for (unsigned char X = 'A'; X <= 'Z'; ++X)
markCharAcceptable(X);
for (unsigned char X = '0'; X <= '9'; ++X)
markCharAcceptable(X);
// These chars are acceptable.
markCharAcceptable('_');
markCharAcceptable('$');
markCharAcceptable('.');
// Calculate which global values have names that will collide when we throw
// away type information.
std::map<std::string, GlobalValue*> Names;