llvm-svn: 50995

Move the various analyses used by GVN into static variables so we don't have to keep passing them around or refetching them.

llvm-svn: 50963

method.  DOUT statements are disabled when assertions are off, but the
side effects of getName() are still evaluated.  Just call getNameSTart,
which is close enough and doesn't cause heap traffic.

llvm-svn: 50958

llvm-svn: 50957

crash on kimwitu++.

llvm-svn: 50901

llvm-svn: 50900

   ~x < ~y --> y < x
   -x == -y --> x == y

llvm-svn: 50882

llvm-svn: 50881

Patch by Matthijs Kooijman!

llvm-svn: 50861

also need to be checked for memory modifying instructions before we
can sink them.  THis fixes the second half of PR2297.

llvm-svn: 50860

delete the first store in:

store x -> p
load p
store y -> p

This is for PR2297.

llvm-svn: 50859

llvm-svn: 50851

llvm-svn: 50836

llvm-svn: 50793

llvm-svn: 50775

We need to update PHIs containing the exiting block, not the exit block.  We really should come up with better names for these.

llvm-svn: 50770

llvm-svn: 50713

llvm-svn: 50699

llvm-svn: 50696

llvm-svn: 50695

ComputeMaskedBits.

llvm-svn: 50692

themselves weren't in the anonymous namespace.

llvm-svn: 50673

DemoteRegToStack doesn't work with MRVs yet, because it relies on the
ability to load/store things.

This fixes PR2285.

llvm-svn: 50667

using dyn_cast<> on already freed memory.

llvm-svn: 50618

llvm-svn: 50604

llvm-svn: 50600

llvm-svn: 50591

llvm-svn: 50586

llvm-svn: 50582

llvm-svn: 50564

from x86-64 calling convention work.

llvm-svn: 50545

fixes the 254.gap regression on x86 and the 403.gcc regression on x86-64.

llvm-svn: 50537

2) Return NULL instead of false in several places for tidiness.
3) fix a bug optimizing  sprintf(p, "%c", x)

llvm-svn: 50521

a FunctionPass.  This makes it simpler, fixes dozens of bugs, adds
a couple of minor features, and shrinks is considerably: from
2214 to 1437 lines.

llvm-svn: 50520

llvm-svn: 50473

to instcombine.

llvm-svn: 50472

llvm-svn: 50464

Revert r50441.  The original code was correct.  Add some more comments so that I don't make the same mistake in the future.

llvm-svn: 50446

we were checking for it in the wrong order.  This caused a miscompilation because the
return slot optimization assumes that the call it is dealing with is NOT a memcpy.

llvm-svn: 50444

llvm-svn: 50442