Do a dominator walk when scheduling copies, rather than a DFS on the CFG.  Also, fix a few problems when creating
live intervals for temporaries created by phi elimination.

llvm-svn: 54483

and objc++.

llvm-svn: 54474

directory: some people (guess who!) may build llvm-gcc
with support for objc but not with support for objc++.

llvm-svn: 54471

postfixing it with a number.

llvm-svn: 54468

r53941 (but this was not noticed due to the lack of a basic test for
SRETPromotion). 

llvm-svn: 54467

llvm-svn: 54466

llvm-svn: 54465

llvm-svn: 54464

llvm-svn: 54462

llvm-svn: 54461

llvm-svn: 54460

llvm-svn: 54459

llvm-svn: 54458

llvm-svn: 54457

llvm-svn: 54456

llvm-svn: 54455

llvm-svn: 54454

llvm-svn: 54453

llvm-svn: 54452

llvm-svn: 54451

llvm-svn: 54450

llvm-svn: 54449

llvm-svn: 54448

llvm-svn: 54447

llvm-svn: 54446

LowerSubregs, and fix an x86-64 isel bug that this exposed.

SUBREG_TO_REG for x86-64 implicit zero extension is only safe for
isel to generate when the source is known to always have zeros in
the high 32 bits. The EXTRACT_SUBREG instruction does not clear
the high 32 bits.

llvm-svn: 54444

llvm-svn: 54443

are allocated in the same buffer as the code,
jump tables, etc.

The default JIT memory manager does not handle buffer
overflow well.  I didn't introduce this and I'm not
attempting to fix it here, but it is more likely to
be hit now since we're putting more stuff in the
buffer.  This affects one test that I know of so far,
MultiSource/Benchmarks/NPB-serial/is.

llvm-svn: 54442

Factor code that finalize PHI nodes, jump tables, etc. out of SelectBasicBlock. No functionality changes.

llvm-svn: 54438

SDISel's constant branch folding can fold away self-loops, which doesn't result in any dead blocks, but
rather an incorrect phi input.  Add code to UnreachableMachineBlockElim to get rid of these entries.

llvm-svn: 54432

Correct handle cases where two phis are coalesced together, and correct break up the case where two different
phis want to coalesce with the same vreg.

llvm-svn: 54426

llvm-svn: 54425

llvm-svn: 54424

llvm-svn: 54422

llvm-svn: 54421

llvm-svn: 54420

this time using MOV32to32_ and MOV16to16_. Thanks to Evan for
suggesting this.

llvm-svn: 54418

when it meant to be emitting undef indices.

llvm-svn: 54417

llvm-svn: 54416

Fix PR2355: bug in ChangeCompareStride. When the loop termination compare is the only use of its iv stride, the stride can be eliminated by moving it to another stride. If the scale is negative, swap the predicate instead of using a inverse predicate.

llvm-svn: 54415