into a single LEA instruction.  This should improve the code generated for
things like X->A.B.C[12].D.

The bigger benefit is still coming though.  Note that this uses an LEA instruction
instead of an add, giving the register allocator more freedom.  We should probably
never generate ADDri32's.

llvm-svn: 11817

an intermediate register.

llvm-svn: 11816

so that we always get the inline function instead. Remember, kids, like it says
in the GCC manual, "An Inline Function is As Fast As a Macro."

llvm-svn: 11815

llvm-svn: 11814

llvm-svn: 11813

llvm-svn: 11811

Also fix problem where we didn't check to see if a node pointer was null.
Though fclose(null) doesn't make a lot of sense, 300.twolf does it.

llvm-svn: 11810

llvm-svn: 11809

llvm-svn: 11804

longer was getting this #include, it always fell back on the less precise
floating point initializer values, causing some testsuite failures.

llvm-svn: 11803

llvm-svn: 11801

llvm-svn: 11800

llvm-svn: 11799

allocator.

The implementation is completely rewritten and now employs several
optimizations not exercised before. For example for 164.gzip we have
997 loads and 699 stores vs the 1221 loads and 880 stores we have
before.

llvm-svn: 11798

This case occurs many times in various benchmarks, especially when combined
with the previous patch.  This allows it to get stuff like:
  if (X == 4 || X == 3)
    if (X == 5 || X == 8)

and

switch (X) {
case 4: case 5: case 6:
  if (X == 4 || X == 5)

llvm-svn: 11797

merged.

llvm-svn: 11796

register mapping or a stack slot mapping.

llvm-svn: 11795

llvm-svn: 11794

llvm-svn: 11793

This turns code like this:
  if (X == 4 | X == 7)
and
  if (X != 4 & X != 7)
into switch instructions.

llvm-svn: 11792

  if (X == 4 || X == 7)
and
  if (X != 4 && X != 7)

into switch instructions.

llvm-svn: 11791

llvm-svn: 11790

llvm-svn: 11789

llvm-svn: 11788

llvm-svn: 11787

llvm-svn: 11786

remove our dependency on boost!  Thanks to Reid Spencer for making this possible!

llvm-svn: 11785

template.  Thanks go out to Reid Spencer for skillfully extracting this
from boost!

llvm-svn: 11784

llvm-svn: 11783

llvm-svn: 11782

llvm-svn: 11781

251 (providing a generic machine code rewriter/spiller).

llvm-svn: 11780

llvm-svn: 11779

llvm-svn: 11778

llvm-svn: 11777

llvm-svn: 11776

llvm-svn: 11775

llvm-svn: 11774

llvm-svn: 11773

llvm-svn: 11772