A virtual register can be used before it is defined in the same MBB if the MBB
is part of a loop. Teach the implicit-def pass about this case.

llvm-svn: 96279

test, but the problem seems to have gone away today.  Add a check to make sure
it doesn't come back.

llvm-svn: 96277

Module (we were called with verifyFunction and an unowned Function) we can't
rely on Mod->getContext().

llvm-svn: 96275

fixes a crash using FPM on a Function that isn't owned by a Module.

llvm-svn: 96273

functions not embedded within modules.

llvm-svn: 96272

llvm-svn: 96271

llvm-svn: 96269

llvm-svn: 96266

and the testcase needs improvement.

llvm-svn: 96265

llvm-svn: 96264

called by jump threading.

llvm-svn: 96263

IsLegalToFold and IsProfitableToFold. The generic version of the later simply checks whether the folding candidate has a single use.

This allows the target isel routines more flexibility in deciding whether folding makes sense. The specific case we are interested in is folding constant pool loads with multiple uses.

llvm-svn: 96255

llvm-svn: 96248

Add support for emitting non-temporal stores for DAGs marked
non-temporal.

llvm-svn: 96241

Add non-temporal flags and remove an assumption of default arguments.

llvm-svn: 96240

Remove an assumption of default arguments.  This is in anticipation of a
change to SelectionDAG build APIs.

llvm-svn: 96239

change to SelectionDAG build APIs.

llvm-svn: 96238

change to SelectionDAG build APIs.

llvm-svn: 96237

change to SelectionDAG build APIs.

llvm-svn: 96236

change to SelectionDAG build APIs.

llvm-svn: 96235

change to SelectionDAG build APIs.

llvm-svn: 96234

change to SelectionDAG build APIs.

llvm-svn: 96233

change to SelectionDAG build APIs.

llvm-svn: 96232

change to SelectionDAG build APIs.

llvm-svn: 96231

change to SelectionDAG build APIs.

llvm-svn: 96230

change to SelectionDAG build APIs.

llvm-svn: 96229

Remove an assumption of default arguments.  This is in anticipation of a
change to SelectionDAG build APIs.

llvm-svn: 96228

Remove an assumption of default arguments.  This is in anticipation of a
change to SelectionDAG build APIs.

llvm-svn: 96227

Add non-temporal flags to MachineMemOperand.

llvm-svn: 96226

isInteger, we now have isFloatTy and isIntegerTy.  Requested by Chris!

llvm-svn: 96223

llvm-svn: 96221

llvm-svn: 96220

name, test whether the SCEV itself is that temporary symbolic name,
in addition to checking whether the symbolic name appears as a
possibly-indirect operand.

llvm-svn: 96216

produce a table based matcher instead of gobs of C++ Code.

Though it's not done yet, the shrinkage seems promising,
the table for the X86 ISel is 75K and still has a lot of 
optimization to come (compare to the ~1.5M of .o generated
the old way, much of which will go away).

The code is currently disabled by default (the #if 0 in
DAGISelEmitter.cpp).  When enabled it generates a dead
SelectCode2 function in the DAGISel Header which will
eventually replace SelectCode.

There is still a lot of stuff left to do, which are
documented with a trail of FIXMEs.

llvm-svn: 96215

many other natural things.

llvm-svn: 96214

packing somewhat densely is better than not.

llvm-svn: 96213

llvm-svn: 96212

This behaviour must be configurable.

llvm-svn: 96210

which may call write_impl on things that are not the usual buffer.

llvm-svn: 96209

 OS.PadToColumn(42) << "foo";

llvm-svn: 96208