they are lowered to instruction sequences more complex than a simple
load, such that CodeGen cannot rematerialize them, a reload from a
spill slot is likely to be cheaper than the complex sequence.

llvm-svn: 89374

llvm-svn: 89372

llvm-svn: 89369

everything else.

llvm-svn: 89368

llvm-svn: 89364

llvm-svn: 89363

llvm-svn: 89360

llvm-svn: 89359

llvm-svn: 89357

Add support for spreading register allocation.

Add a -linearscan-skip-count argument (default to 0) that tells the
allocator to remember the last N registers it allocated and skip them
when looking for a register candidate.  This tends to spread out
register usage and free up post-allocation scheduling at the cost of
slightly more register pressure.  The primary benefit is the ability
to backschedule reloads.

This is turned off by default.

llvm-svn: 89356

llvm-svn: 89354

4.2.4, 4.3.4, 4.4.2.
The workaround is to use a local min/max implementation that takes an integer
param, and not a reference to integer param (like std::min does).

llvm-svn: 89352

llvm-svn: 89341

llvm-svn: 89339

llvm-svn: 89337

llvm-svn: 89329

llvm-svn: 89328

llvm-svn: 89326

llvm-svn: 89325

- Support mips1 like load/store of doubles:

Instead of:
  sdc $f0, X($3)
Generate:
  swc $f0, X($3)
  swc $f1, X+4($3)

llvm-svn: 89322

llvm-svn: 89316

All spiller calls in RegAllocLinearScan now go through the new Spiller interface.
The "-new-spill-framework" command line option has been removed. To use the trivial in-place spiller you should now pass "-spiller=trivial -rewriter=trivial".
(Note the trivial spiller/rewriter are only meant to serve as examples of the new in-place modification work. Enabling them will yield terrible, though hopefully functional, code).

llvm-svn: 89311

llvm-svn: 89301

for uses inside the loop. This works better with LSR. Disabled behind
-simplify-iv-users while benchmarking.

llvm-svn: 89299

Eliminate duplicate phi nodes in loops. Loop rotation, for example, can introduce these, and it's beneficial to later passes to clean them up.

llvm-svn: 89298

llvm-svn: 89297

string that's aligned at 8-bytes instead of 16-bytes.

llvm-svn: 89295

which the makefiles will create by symlinking the actual tool to.
 - For use by clang, where we want to make 'clang++' and alias for clang (which
   enables C++ support in the driver)

 - Not sure this is the best approach, alternative suggestions welcome!

llvm-svn: 89282

exception table than DataRel.

llvm-svn: 89279

optimizer.

llvm-svn: 89278

llvm-svn: 89275

llvm-svn: 89274

llvm-svn: 89273

llvm-svn: 89272

Place the EH table in the __TEXT section on MachO. It saves space.

llvm-svn: 89270

the tail of a block may make that block a new candidate for duplication.

llvm-svn: 89264

llvm-svn: 89254

llvm-svn: 89252

llvm-svn: 89250

When TwoAddressInstructionPass deletes a dead instruction, make sure that all
register kills are accounted for. The 2-addr register does not get special
treatment.

llvm-svn: 89246