turns out that it could cause an infinite loop in some situations. If this code
is triggered and it converts a cleanup into a catchall, but that cleanup was in
already in a cleanup, then the _Unwind_SjLj_Resume could infinite loop. I.e.,
the code doesn't consume the exception object and passes it on to
_Unwind_SjLj_Resume. But _USjLjR expects it to be consumed (since it's landing
at a catchall instead of a cleanup). So it uses the values that are presently
there, which are the values that tell it to jump to the fake landing pad.
<rdar://problem/9508402>

llvm-svn: 132381

llvm-svn: 132380

Also reflow these lines to fit in 80-col.

llvm-svn: 132379

llvm-svn: 132377

llvm-svn: 132376

llvm-svn: 132375

tools that match on the C++ ASTs. The main interface is in ASTMatchers.h,
an example implementation of a tool that removes redundant .c_str() calls
is in the example RemoveCStrCalls.cpp.

Various contributions:
Zhanyong Wan, Chandler Carruth, Marcin Kowalczyk, Wei Xu, James Dennett.

llvm-svn: 132374

llvm-svn: 132373

inside a try-except block in case the test is not invoked through the dotest.py test driver.

llvm-svn: 132372

llvm-svn: 132371

llvm-svn: 132370

Revert 132332 (Microsoft friend as a forward declaration), John McCall pointed out a better/simpler way to do it. 

llvm-svn: 132369

llvm-svn: 132368

llvm-svn: 132367

llvm-svn: 132365

llvm-svn: 132364

I've seen this question enough times to know that it should be fixed: http://stackoverflow.com/questions/6193734/implicit-conversions-with-stdfunction

llvm-svn: 132363

llvm-svn: 132361

so that their sign extended forms are congruent when no overflow occurs.

llvm-svn: 132360

llvm-svn: 132359

When assigned ranges are evicted, they are put in the RS_Evicted stage and are
not allowed to evict anything else. That prevents looping automatically.

When evicting ranges just to get a cheaper register, use only spill weights to
find the possible candidates. Avoid breaking hints for this purpose, it is not
worth it.

Start implementing more complex eviction heuristics, guarded by the temporary
-complex-eviction flag. The initial version permits a heavier range to be
evicted if it doesn't have any uses where the evicting range is live. This makes
it a good candidate for live ranfge splitting.

llvm-svn: 132358

llvm-svn: 132357

llvm.memcpy.* has two distinct associated address spaces; the source address space, and the destination address space.  Fix up the interface on MemIntrinsic and MemTransferInst to make this clear, and fix InstructionDereferencesPointer in LazyValueInfo.cpp to use the interface properly.

llvm-svn: 132356

llvm-svn: 132355

value fails to evaluate.

llvm-svn: 132354

llvm-svn: 132353

from David Meyer's patch!

llvm-svn: 132352

llvm-svn: 132351

expression. Fixes bug raised by hhinnant to cfe-dev

llvm-svn: 132350

llvm-svn: 132349

sub with a non-constant.  Fix comments, enlarge test case.
rdar://problem/6501862

llvm-svn: 132348

llvm-svn: 132345

llvm-svn: 132344

llvm-svn: 132342

llvm-svn: 132341

llvm-svn: 132340

llvm-svn: 132338

llvm-svn: 132337

llvm-svn: 132336

llvm-svn: 132335