Tested with "make check"!

llvm-svn: 42346

llvm-svn: 42345

llvm-svn: 42344

llvm-svn: 42343

llvm-svn: 42342

llvm-svn: 42341

llvm-svn: 42338

llvm-svn: 42335

llvm-svn: 42333

llvm-svn: 42332

llvm-svn: 42331

llvm-svn: 42329

cases with undefined behavior.

llvm-svn: 42328

llvm-svn: 42324

llvm-svn: 42323

llvm-svn: 42322

llvm-svn: 42318

llvm-svn: 42316

llvm-svn: 42314

llvm-svn: 42313

llvm-svn: 42312

This fixes PR714.

llvm-svn: 42309

both results with a single div or idiv instruction. This uses new X86ISD
nodes for DIV and IDIV which are introduced during the legalize phase
so that the SelectionDAG's CSE can automatically eliminate redundant
computations.

llvm-svn: 42308

llvm-svn: 42306

llvm-svn: 42303

llvm-svn: 42302

doh.. 

llvm-svn: 42300

for (i=A; i<N; i++) {
  if (i < X && i > Y)
    do_something();
}

is transformed into

U=min(N,X); L=max(A,Y);
for (i=L;i<U;i++)
  do_somethihg();                            

llvm-svn: 42299

of zero, infinity, and NaNs.

llvm-svn: 42298

the check to see if the assembler supports .loc from X86TargetLowering
into the superclass TargetLowering.

llvm-svn: 42297

llvm-svn: 42296

llvm-svn: 42294

llvm-svn: 42286

Added support for new condition code modeling scheme (i.e. physical register dependency). These are a bunch of instructions that are duplicated so the x86 backend can support both the old and new schemes at the same time. They will be deleted after
all the kinks are worked out.

llvm-svn: 42285

Added major new capabilities to scheduler (only BURR for now) to support physical register dependency. The BURR scheduler can now backtrace and duplicate instructions in order to avoid "expensive / impossible to copy" values (e.g. status flag EFLAGS for x86) from being clobbered.

llvm-svn: 42284

llvm-svn: 42283

llvm-svn: 42282

have situations where an SSE instruction turns into
multiple blocks, with the live range of an x87
register crossing them.  To do this correctly make
sure we examine all blocks when inserting
FP_REG_KILL.  PR 1697.  (This was exposed by my
fix for PR 1681, but the same thing could happen
mixing x87 long double with SSE.)

llvm-svn: 42281

llvm-svn: 42280

llvm-svn: 42279