Remat during spilling triggers dead code elimination. If a phi-def
becomes unused, that may also cause live ranges to split into separate
connected components.

This type of splitting is different from normal live range splitting. In
particular, there may not be a common original interval.

When the split range is its own original, make sure that the new
siblings are also their own originals. The range being split cannot be
used as an original since it doesn't cover the new siblings.

llvm-svn: 134413

llvm-svn: 134412

llvm-svn: 134411

llvm-svn: 134410

llvm-svn: 134409

llvm-svn: 134408

Teach Clang's <float.h> to also include MinGW's <float.h>, which provides additional system definitions, from Ruben Van Boxem

llvm-svn: 134407

llvm-svn: 134406

llvm-svn: 134405

Tested by valgrind & Sema/asm.c.

llvm-svn: 134404

llvm-svn: 134403

The latest version of LLVM fails, if a function is defined twice in an LLVM
bitcode file.

llvm-svn: 134400

llvm-svn: 134399

Remove the assert that triggers if SuccIterator is constructed for a basic block
without a terminator instruction. Instead of triggering an assert a succ_end()
iterator is returned. This models a basic block with zero successors and allows
us to use F->viewCFG() on incompletely constructed functions.

llvm-svn: 134398

llvm-svn: 134393

llvm-svn: 134392

PR10267: Don't combine an equality compare with an AND into an inequality compare when the AND has more than one use.

This can pessimize code, inequalities are generally more expensive.

llvm-svn: 134379

llvm-svn: 134377

Noticed by Benjamin Kramer!

llvm-svn: 134376

llvm-svn: 134375

fprintf, and to be more consistent in formatting with the other stats
printing routines.

llvm-svn: 134374

fprintf. There is more cleanup to be done to the AST stats printing...

llvm-svn: 134373

This fixes the issue noted in PR10251 where early tail dup of bbs with
indirectbr would cause a bb to be duplicated into a loop preheader
and then into its predecessors, creating phi nodes with identical
operands just before register allocation.

This helps with jsinterp.o size (__TEXT goes from 163568 to 126656)
and a bit with performance 1.005x faster on sunspider (jits still enabled).

The result on webkit with the jit disabled is more significant: 1.021x faster.

llvm-svn: 134372

HasIndirectbr variable to be just that. No functionality change.

llvm-svn: 134371

llvm-svn: 134370

A split point inserted in a block with a landing pad successor may be
hoisted above the call to ensure that it dominates all successors. The
code that handles the rest of the basic block must take this into
account.

I am not including a test case, it would be very fragile. PR10244 comes
from building clang with exceptions enabled.

llvm-svn: 134369

generated from the swig docstring features instead of blindly applying the
cleanup action for all input lines.

llvm-svn: 134368

This is what both the ABI and clang says.

llvm-svn: 134367

llvm-svn: 134366

llvm-svn: 134364

llvm-svn: 134361

Add post-processing step to remove the trailing blank lines from the docstrings of lldb.py.

llvm-svn: 134360

a file or socket. We now make a getsockopt call to check if the fd is a socket.

Also, the previous logic in the GDB communication needs to watch for success
with an error so we can deal with EAGAIN and other normal "retry" error codes.

llvm-svn: 134359

makes one of the tests actually mean something (as the string 'add' will
always appear in the output of this file).

llvm-svn: 134358

_only_ in the resulting stream, not in the error objects (lldb_private::Error).
lldb_private::Error objects should always just have an error string with no 
terminating newline characters or periods.

Fixed an issue with GDB remote packet detection that could end up deadlocking
if a full packet wasn't received in one chunk. Also modified the packet 
checking function to properly toss one or more bytes when it detects bad
data. 

llvm-svn: 134357

a file descriptor.

llvm-svn: 134355

desired result based on the comments in the file.

llvm-svn: 134354

llvm-svn: 134353

llvm-svn: 134352

llvm-svn: 134351