llvm-svn: 56791

<rdar://problem/6253141> Parser rejection occurs when command line has more than one -isysroot switch

llvm-svn: 56790

llvm-svn: 56789

huge simply connected components.  Suggested
by Chris.

llvm-svn: 56787

llvm-svn: 56786

llvm-svn: 56785

llvm-svn: 56784

adding a backend.

llvm-svn: 56783

instead of hasWeakLinkage in a bunch of optimization
passes.

llvm-svn: 56782

I originally made this script to show that scalarrepl didn't support them, but
it turned out it does. Better to still add the testcase then.

llvm-svn: 56781

llvm-svn: 56776

llvm-svn: 56775

llvm-svn: 56774

Fix <rdar://problem/6252129> implementation of method in category doesn't effectively declare it for methods below.

llvm-svn: 56771

llvm-svn: 56770

by decaying __builtin_va_list's type when forming builtins.  On
x86-64 (and other targets) __builtin_va_list is a typedef for
an array.

llvm-svn: 56768

wasn't covering checking builtins like __builtin___vsnprintf_chk) with
a check that won't get out of date. 

llvm-svn: 56767

don't need a BlockDeclRefExpr.

llvm-svn: 56766

llvm-svn: 56765

llvm-svn: 56764

Comment exception-handling code generation strategy.

llvm-svn: 56763

llvm-svn: 56762

llvm-svn: 56761

helper functions instead of duplicating it inline each time
it is needed. This eliminates a few hundred or so copies
of this code in each target.

llvm-svn: 56759

readable and to generate more readable IR.

llvm-svn: 56758

 - I'm open to the idea that these could have better names. I think
   these read better than CreateEQNull and CreateNENull.

llvm-svn: 56757

 - This should be rejected by sema (IMHO) but that needs some
   investigation.

llvm-svn: 56756

llvm-svn: 56755

 - There is no need to branch on the rethrow variable to determine if
   we need to call objc_exception_try_exit. We know whether an
   exception was thrown, so just branch to a different target if we
   want to skip the try_exit. 

   This is a slight semantic departure from gcc, but only for throwing
   nil, which is undefined (and for which gcc emits broken code).

 - Also fixes a bug in current code which was calling try_exit too
   many times when an exception was uncaught (but there were some
   handlers).

Fix bug introduced in prev. commit, the type of the @catch parameter
was uninitialized.

llvm-svn: 56754

llvm-svn: 56753

of the function.

llvm-svn: 56752

when there are no @catch blocks.

Also, eliminated unneeded alloca for the rethrow object.

Also, avoid generating code to rethrow exception if the exception will
trivially always be caught.

llvm-svn: 56751

(smaller) size == garbage on stack == heisenbugs.

llvm-svn: 56750

llvm-svn: 56749

llvm-svn: 56748

 - Is unused and somewhat unreliable.

llvm-svn: 56737

llvm-svn: 56735

llvm-svn: 56734

llvm-svn: 56733

llvm-svn: 56730