Commit Graph

64 Commits

Author SHA1 Message Date
Chris Lattner
8dc4f2bb60 properly record chain inputs to complex patterns,
resolving a fixme.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96457 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 06:08:25 +00:00
Chris Lattner
785d16fe75 Prep work to handle input chains of matched patterns and checking for
'ischaincompatible' when a pattern has more than one input chain.  Need
to do some commenting and cleanup now that I understand how this works.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96443 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 02:16:19 +00:00
Chris Lattner
2f7ecdeb1d record input chains.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96437 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 01:34:15 +00:00
Chris Lattner
c642b84fb8 prefix captured value names with $ so they look like
variables.  Use the fancy OpNo variable instead of i,
which has the right index including chains.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96436 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 01:27:29 +00:00
Chris Lattner
c96087b343 improve comments on OPC_Record to say what we're recording a node.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96433 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 01:03:09 +00:00
Chris Lattner
e609a513f3 make the new isel generator plop out a CheckComplexPattern function
for evaluating complex patterns.  Some cleanup has to happen before
this can be used though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96419 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 00:31:50 +00:00
Chris Lattner
c2676b2909 fix inverted condition.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96416 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 00:11:30 +00:00
Chris Lattner
53a2f60062 complex patterns don't get 'record' nodes, they implicitly
record all their results.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96412 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 23:16:25 +00:00
Chris Lattner
92d3ada814 fix rdar://7653908, a crash on a case where we would fold a load
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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96408 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 22:35:06 +00:00
Chris Lattner
6bc1b51377 simplify this code. In the new world order there is no
need to scan the entire subtree of the pattern anymore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96369 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 19:19:58 +00:00
Chris Lattner
21390d7984 convert the new matcher to check intermediate nodes for a single
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96368 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 19:15:55 +00:00
Chris Lattner
e2de49d9a1 remove now dead code and fixme.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96333 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 06:15:00 +00:00
Chris Lattner
e39650a805 add support for the new isel matcher to generate
(isprofitable|islegal)tofold checks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96331 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16 06:10:58 +00:00
Chris Lattner
da272d1a70 Check in the first big step of rewriting DAGISelEmitter to
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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96215 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-15 08:04:42 +00:00