a trivial unittest would have caught.  This revision also adds the trivial
unittest.

llvm-svn: 82675

llvm-svn: 82384

llvm-svn: 82377

llvm-svn: 82375

llvm-svn: 82372

llvm-svn: 82370

non-sorted order, restore the sort.

llvm-svn: 82368

eliminate the duplicate detection loop, moving it into the loop that populates the Opts vector in the first place.

llvm-svn: 82367

llvm-svn: 82366

the middle of a vector, swap the last element in and pop_back.  Also saves 330 bytes :)

llvm-svn: 82365

release-asserts .o file (72900->71856).

llvm-svn: 82364

llvm-svn: 82363

1. Change some "\n" -> '\n'.
2. eliminte some std::string's by using raw_ostream::indent.
3. move a bunch of code out of the main arg parser routine into
   a new static HandlePrefixedOrGroupedOption function.
4. Greatly simplify the implementation of getOptionPred, and make
   it avoid splitting prefix options at = when that doesn't match
   a non-prefix option.

llvm-svn: 82362

llvm-svn: 82360

llvm-svn: 82352

maintain the "null is unspecified, empty is empty" semantics.

llvm-svn: 82351

This requires StringRef'izing ProvideOption which I also did.

llvm-svn: 82350

llvm-svn: 82348

llvm-svn: 82346

stringref because they may not be nul terminated.  For options like -Lfoo
this now avoids a O(n)  temporary std::strings where N is the length of 
the string after -L.

llvm-svn: 82345

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

llvm-svn: 82341

llvm-svn: 82339

a massive number of temporary strings created when parsing a command line.
More still left to eliminate.

llvm-svn: 82318

- Replace std::map<std::string with StringMap
- Eliminate unnecessary std::string copies
- ~10% speed-up for clang's testsuite on my machine (debug build)

llvm-svn: 82312

llvm-svn: 80855

llvm-svn: 79857

llvm-svn: 79847

llvm-svn: 79842

llvm-svn: 77892

llvm-svn: 77127

llvm-svn: 75889

This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640

Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379

and abort()/exit() -> llvm_report_error().

llvm-svn: 75363

llvm-svn: 70437

abstraction for CommandLine.

llvm-svn: 68588

* Simplified if statement

llvm-svn: 68163

llvm-svn: 67892

option to make the -fno- form on the option.  We also document the new
form in the CommandLine documentation.

llvm-svn: 63559

is necessary for eventual gcc commmand line compatibility.

llvm-svn: 63384