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avoid a bunch of malloc thrashing for PositinoalVals by eliminating

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a std::vector and a bunch of std::string temporaries.

llvm-svn: 82341
This commit is contained in:
Chris Lattner 2009-09-20 00:07:40 +00:00
parent 6ad3b51864
commit bb111eeae4
1 changed files with 9 additions and 11 deletions
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20
lib/Support/CommandLine.cpp
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@ -181,17 +181,16 @@ static inline bool ProvideOption(Option *Handler, const char *ArgName,
switch (Handler->getValueExpectedFlag()) {
case ValueRequired:
if (Value == 0) { // No value specified?
if (i+1 < argc) { // Steal the next argument, like for '-o filename'
Value = argv[++i];
} else {
if (i+1 >= argc)
return Handler->error("requires a value!");
}
// Steal the next argument, like for '-o filename'
Value = argv[++i];
}
break;
case ValueDisallowed:
if (NumAdditionalVals > 0)
return Handler->error("multi-valued option specified"
" with ValueDisallowed modifier!");
" with ValueDisallowed modifier!");
if (Value)
return Handler->error("does not allow a value! '" +
@ -199,6 +198,7 @@ static inline bool ProvideOption(Option *Handler, const char *ArgName,
break;
case ValueOptional:
break;
default:
errs() << ProgramName
<< ": Bad ValueMask flag! CommandLine usage error:"
@ -221,7 +221,6 @@ static inline bool ProvideOption(Option *Handler, const char *ArgName,
}
while (NumAdditionalVals > 0) {
if (i+1 >= argc)
return Handler->error("not enough values!");
Value = argv[++i];
@ -234,10 +233,9 @@ static inline bool ProvideOption(Option *Handler, const char *ArgName,
return false;
}
static bool ProvidePositionalOption(Option *Handler, const std::string &Arg,
int i) {
static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
int Dummy = i;
return ProvideOption(Handler, Handler->ArgStr, Arg.c_str(), 0, 0, Dummy);
return ProvideOption(Handler, Handler->ArgStr, Arg.data(), 0, 0, Dummy);
}
@ -483,9 +481,9 @@ void cl::ParseCommandLineOptions(int argc, char **argv,
}
// PositionalVals - A vector of "positional" arguments we accumulate into
// the process at the end...
// the process at the end.
//
std::vector<std::pair<std::string,unsigned> > PositionalVals;
SmallVector<std::pair<StringRef,unsigned>, 4> PositionalVals;
// If the program has named positional arguments, and the name has been run
// across, keep track of which positional argument was named. Otherwise put