there may be other def(s) apart from the use&def two-address operand. We need
to check if the register reuse for a use&def operand may conflicts with another
def. Provide a mean to recover from the conflict if it is detected when the
defs are processed later.

llvm-svn: 31439

llvm-svn: 31438

llvm-svn: 31437

llvm-svn: 31436

llvm-svn: 31435

llvm-svn: 31434

llvm-svn: 31433

llvm-svn: 31432

llvm-svn: 31431

llvm-svn: 31430

llvm-svn: 31429

from future changes.

llvm-svn: 31428

vector accesses like we handle out-of-range array accesses.

llvm-svn: 31427

llvm-svn: 31426

llvm-svn: 31422

llvm-svn: 31419

llvm-svn: 31417

llvm-svn: 31416

improves readability of the call handling code significantly, as well as
makes it clear which parts are hacky (externals) and which parts are good
(call handling).

No functionality change.

llvm-svn: 31415

llvm-svn: 31414

llvm-svn: 31413

llvm-svn: 31412

llvm-svn: 31411

llvm-svn: 31410

llvm-svn: 31409

llvm-svn: 31408

into a pair of base / offset nodes for pre-indexed load / store ops.

llvm-svn: 31407

llvm-svn: 31406

llvm-svn: 31405

llvm-svn: 31404

llvm-svn: 31403

llvm-svn: 31402

llvm-svn: 31401

llvm-svn: 31400

llvm-svn: 31399

llvm-svn: 31398

llvm-svn: 31397

llvm-svn: 31396

llvm-svn: 31395

llvm-svn: 31394