llvm-svn: 114468

I think I've audited all uses, so it should be dependable for address spaces,
and the pointer+offset info should also be accurate when there.

llvm-svn: 114464

llvm-svn: 114463

llvm-svn: 114461

(sbbl x, x) sets the registers to 0 or ~0.  Combined with two's complement arithmetic, we can fold
the intermediate AND and the ADD into a single SUB.

This fixes <rdar://problem/8449754>.

llvm-svn: 114460

llvm-svn: 114459

llvm-svn: 114455

and store intrinsics are represented with MemIntrinsicSDNodes.

llvm-svn: 114454

llvm-svn: 114453

MachinePointerInfo around more.

llvm-svn: 114452

llvm-svn: 114450

with an indexed load/store that has an offset in the index.

llvm-svn: 114449

instead of calling lower_bound or upper_bound directly.

This cleans up the search logic a bit because {lower,upper}_bound compare
LR->start by default, and it is usually simpler to search LR->end.

Funnelling all searches through one function also makes it possible to replace
the search algorithm with something faster than binary search.

llvm-svn: 114448

llvm-svn: 114447

SelectionDAG::getExtLoad overload, and eliminate it.

llvm-svn: 114446

llvm-svn: 114445

llvm-svn: 114444

getLoad overloads.

llvm-svn: 114443

with SVOffset computation.

llvm-svn: 114442

llvm-svn: 114439

llvm-svn: 114437

no functionality change (step #1)

llvm-svn: 114436

llvm-svn: 114435

llvm-svn: 114434

llvm-svn: 114433

llvm-svn: 114432

llvm-svn: 114431

I am unable to write a test for this case, help is solicited, though...
What I did is to tickle the code in the debugger and verify that we do the right thing.

llvm-svn: 114430

Added an additional PBQP problem builder which adds coalescing costs (both between pairs of virtuals, and between virtuals and physicals).

llvm-svn: 114429

into OptimizeCompareInstr.
This necessitates the passing of CmpValue around,
so widen the virtual functions to accomodate.

No functionality changes.

llvm-svn: 114428

llvm-svn: 114427

pass a completely incorrect SrcValue, which would result in a miscompile with
combiner-aa.

llvm-svn: 114411

llvm-svn: 114410

llvm-svn: 114409

"getFixedStack" on the MachinePointerInfo class.  While
this isn't the problem I'm setting out to solve, it is the
right way to eliminate PseudoSourceValue, so lets go with it.

llvm-svn: 114406

llvm-svn: 114405

of the getLoad methods.  This fixes at least one bug where an incorrect
svoffset is passed in (a potential combiner-aa miscompile).

llvm-svn: 114404

into non-segment-relative copies.

llvm-svn: 114402

instead of srcvalue/offset pairs.  This corrects SV info for mem 
operations whose size is > 32-bits.

llvm-svn: 114401

llvm-svn: 114400