for evaluating complex patterns.  Some cleanup has to happen before
this can be used though.

llvm-svn: 96419

llvm-svn: 96416

record all their results.

llvm-svn: 96412

does the same thing as getComplexPatternInfo.

llvm-svn: 96411

llvm-svn: 96409

into a roundss intrinsic, producing a cyclic dag.  The root cause
of this is badness handling ComplexPattern nodes in the old dagisel
that I noticed through inspection.  Eliminate a copy of the of the
code that handled ComplexPatterns by making EmitChildMatchCode call
into EmitMatchCode.

llvm-svn: 96408

need to scan the entire subtree of the pattern anymore.

llvm-svn: 96369

use and only call IsProfitableToFold/IsLegalToFold on the load
being folded, like the old dagiselemitter does.  This 
substantially simplifies the code and improves opportunities for
sharing.

llvm-svn: 96368

with chains.  On interior nodes that lead up to them, we just directly
check that there is a single use.  This generates slightly more
efficient code.

llvm-svn: 96366

llvm-svn: 96337

build if enabled, it will fail with constness issues. I'll resolve 
these next.

llvm-svn: 96336

llvm-svn: 96334

llvm-svn: 96333

llvm-svn: 96332

(isprofitable|islegal)tofold checks.

llvm-svn: 96331

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

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

This behaviour must be configurable.

llvm-svn: 96210

llvm-svn: 96199

on TreePatternNode to be methods on TreePatternNode.

llvm-svn: 96197

that predated -fast-isel which attempted to speed up the dag pattern
matchers at -O0.  Since fast-isel is around, this is basically 
obsolete and removing it shrinks the generated dag isels.

llvm-svn: 96188

llvm-svn: 96187

llvm-svn: 96186

Some tools do not like the '-option parameter' form. Should this be
configurable?

llvm-svn: 96130

class out of line.

llvm-svn: 96113

tables.

llvm-svn: 96073

llvm-svn: 96065

fix swapgs to be spelled right.

llvm-svn: 96058

encoder and decoder by using new MRM_ forms.

llvm-svn: 96048

whose opcodes extend into the ModR/M field using the
Form field of the instruction rather than by special
casing each instruction.  Commented out the special
casing of VMCALL, which is the first instruction to use
this special form.  While I was in the neighborhood,
added a few comments for people modifying the Intel
disassembler. 

llvm-svn: 96043

This will work better for the disassembler for modeling things
like lfence/monitor/vmcall etc.

llvm-svn: 95960

matcher is now free of implicit operands!
 - Still need to clean up the code now that we don't to worry about implicit
   operands, and to make it a hard error if an instruction fails to specify all
   of its operands for some reason.

llvm-svn: 95956

	testb	%al, %al                ## <MCInst #2412 TEST8rr
                                        ##   <MCOperand Reg:2>
                                        ##   <MCOperand Reg:2>>
	jne	LBB1_7                  ## <MCInst #938 JNE_1
                                        ##   <MCOperand Expr:(LBB1_7)>>

llvm-svn: 95935

llvm-svn: 95808

llvm-svn: 95802

 - Pretty messy, but we need to rework how we handle tied operands in MCInst
   anyway.

llvm-svn: 95774

backend to not use exceptions at all except in cases
of actual error.

llvm-svn: 95762

Disassembler to take advantage of the refactored
AsmWriterInst.h.  Note removed parser code.

llvm-svn: 95760

operand into the CodeGenInstruction's list of operands,
which is useful for EDEmitter.  (Still working on PR6219)

llvm-svn: 95759

for representing constraint info semantically instead of
as a c expression that will be blatted out to the .inc
file.  Fix X86RecognizableInstr to use this instead of
parsing C code :).

llvm-svn: 95753