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

llvm-svn: 63171

llvm-svn: 62688

Makes possible to specify options that take multiple arguments (a-la
-sectalign on Darwin). See documentation for details.

llvm-svn: 62372

llvm-svn: 61378

llvm-svn: 60770

instead of requiring all "short description" strings to begin with
two spaces. This makes these strings less mysterious, and it fixes
some cases where short description strings mistakenly did not
begin with two spaces.

llvm-svn: 57521

once (ie, at two different places in the source, not two times on the
commandline).

llvm-svn: 51771

llvm-svn: 50659

llvm-svn: 50355

llvm-svn: 48801