llvm-svn: 109468

llvm-svn: 109462

The "excess register pressure" returned by HighRegPressure() is not accurate enough to factor into scheduling priority. Eliminate it and add early exits to speed up scheduling.

llvm-svn: 109449

llvm-svn: 109415

llvm-svn: 109402

may be used uninitialized in the callers of HighRegPressure.

llvm-svn: 109393

llvm-svn: 109388

llvm-svn: 109383

those.  Radar 8231572.

llvm-svn: 109367

llvm-svn: 109354

instead of fixed size arrays, so that increasing FirstVirtualRegister to 16K
won't cause a compile time performance regression.

llvm-svn: 109330

Use current working directory when Dirname is empty. This only happens when absolute source file path is used on compiler command line.

llvm-svn: 109302

appropriate for targets without detailed instruction iterineries.
The scheduler schedules for increased instruction level parallelism in
low register pressure situation; it schedules to reduce register pressure
when the register pressure becomes high.

On x86_64, this is a win for all tests in CFP2000. It also sped up 256.bzip2
by 16%.

llvm-svn: 109300

to be of a different register class. For example, in Thumb1 if the live-in is
a high register, we want the vreg to be a low register. rdar://8224931

llvm-svn: 109291

llvm-svn: 109285

  it's too late to start backing off aggressive latency scheduling when most
  of the registers are in use so the threshold should be a bit tighter.
- Correctly handle live out's and extract_subreg etc.
- Enable register pressure aware scheduling by default for hybrid scheduler.
  For ARM, this is almost always a win on # of instructions. It's runtime
  neutral for most of the tests. But for some kernels with high register
  pressure it can be a huge win. e.g. 464.h264ref reduced number of spills by
  54 and sped up by 20%.

llvm-svn: 109279

llvm-svn: 109265

llvm-svn: 109262

are not demanded. This often allows the anyext to be folded away.

llvm-svn: 109242

llvm-svn: 109234

llvm-svn: 109205

llvm-svn: 109167

llvm-svn: 109122

llvm-svn: 109103

llvm-svn: 109092

llvm-svn: 109083

llvm-svn: 109082

Patch by Olivier Meurant!

llvm-svn: 109080

llvm-svn: 109079

llvm-svn: 109064

rdar://8202967

llvm-svn: 109057

llvm-svn: 109045

llvm-svn: 109037

Make MDNode::destroy private.
Fix the one thing that used MDNode::destroy, outside of MDNode itself.

One should never delete or destroy an MDNode explicitly. MDNodes
implicitly go away when there are no references to them (implementation
details aside).

llvm-svn: 109028

Changed OStream templates to functions on raw_ostream, removed the unused "renderWarnings" function.

llvm-svn: 109003

llvm-svn: 108991

The spillers can pluck the analyses they need from the pass reference.

Switch some never-null pointers to references.

llvm-svn: 108969

Determine which loop exit blocks need a 'pre-exit' block inserted.
Recognize when this would be impossible.

llvm-svn: 108941

threshold a bit per experimentation.

llvm-svn: 108935

llvm-svn: 108845