the vtlist for emitnode.

llvm-svn: 97429

warnings in release-assert builds if there were no cases.

llvm-svn: 97428

immediate sizes into the opcode.

llvm-svn: 97423

specifies whether there is an output flag or not.  Use this
instead of redundantly encoding the chain/flag results in the
output vtlist.

llvm-svn: 97419

is just a silly wrapper around MorphNodeTo.

llvm-svn: 97416

even some the old isel didn't.  There are several parts of
this that make me feel dirty, but it's no worse than the
old isel.  I'll clean up the parts I can do without ripping
out the old one next.

llvm-svn: 97415

it will populate.

llvm-svn: 97363

because I have to go on another detour first.

llvm-svn: 97362

node is always guaranteed to have a particular type 
instead of hacking in ISD::STORE explicitly.  This allows
us to use implied types for a broad range of nodes, even
target specific ones.

llvm-svn: 97355

llvm-svn: 97348

the opcode name.  This gives the optimizer more semantic info.

llvm-svn: 97346

dissatisfying hack.  TODO: Improve it. :)

llvm-svn: 97317

llvm-svn: 97315

with getType() == MVT::i32 etc.  Teach it that two different
integer constants are contradictory.  This cuts 1K off the X86
table, down to 98k

llvm-svn: 97314

predicates.  For example if we have:

Scope:
  CheckType i32
    ABC
  CheckType f32
    DEF
  CheckType i32
    GHI

Then we know that we can transform this into:
Scope:
  CheckType i32
    Scope
      ABC
      GHI
  CheckType f32
    DEF

This reorders the check for the 'GHI' predicate above
the check for the 'DEF' predidate.  However it is safe to do this
in this situation because we know that a node cannot have both an
i32 and f32 type.

We're now doing more factoring that the old isel did.

llvm-svn: 97312

respects -debug-only=something-else.

llvm-svn: 97307

as deeply into the pattern as we can get away with.  In pratice, this 
means "all the way to to the emitter code, but not across 
ComplexPatterns".  This substantially increases the amount of factoring
we get.

llvm-svn: 97305

llvm-svn: 97219

gross little neighbor merging implementation.  This one has
the benefit of not violating the ordering of patterns, so it
generates code that passes tests again.

llvm-svn: 97218

llvm-svn: 97217

llvm-svn: 97216

current design.  This generates a matcher that successfully
runs, but it turns out that the factoring we're doing violates
the ordering of patterns, so we end up matching (e.g.) movups
where we want movaps.  This won't due, but I'll address this in
a follow on patch.  It's nice to not be on by default yet! :)

llvm-svn: 97215

that we never return a tombstone value, which (thankfully) triggers an
assert in densemap.

llvm-svn: 97214

instead of to have a chained series of scope nodes.  This makes
the generated table smaller, improves the efficiency of the
interpreter, and make the factoring optimization much more 
reasonable to implement.

llvm-svn: 97160

splitting all the patterns under scope nodes into equality sets
based on their first node.  The second step is to rewrite the
graph info a form that exposes the sharing.  Before I do this, 
I want to redesign the Scope node.

llvm-svn: 97130

llvm-svn: 97125

llvm-svn: 97123

llvm-svn: 97097

llvm-svn: 97096

llvm-svn: 97094

reflect what it does.  Switch the sense of the Next and the Check
arms to be more logical.  No functionality change.

llvm-svn: 97093

llvm-svn: 97081

x86 table by 1200 bytes.

llvm-svn: 97053

movechild/record -> recordchild/movechild and 
movechild/moveparent -> noop xforms.  This slightly shrinks the tables
(x86 to 117454) and enables adding future improvements.

llvm-svn: 97051

llvm-svn: 97047

llvm-svn: 97034

the old one around for comparative purposes: have the
ENABLE_NEW_ISEL #define (which is not enabled on mainline) stop
emitting the old isel at all, yay for build time win.

llvm-svn: 97033

the new isel: fold movechild+record+moveparent into a
single recordchild N node.  This shrinks the X86 table
from 125443 to 117502 bytes.

llvm-svn: 97031

Also add an easy macro at the top of DAGISelEmitter.cpp to enable
it.  Lets see if I can avoid accidentally turning it on :)

llvm-svn: 97029

internal nodes with flag results.  Record these with a new 
OPC_MarkFlagResults opcode and use this to update the interior
nodes' flag results properly.  This fixes CodeGen/X86/i256-add.ll
with the new isel.

llvm-svn: 97021