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7 Commits

Author SHA1 Message Date
Nate Begeman
f89d78d7c7 Implement a common missing fold, (add (add x, c1), c2) -> (add x, c1+c2). 
This restores all of stanford to being identical with and without the dag
combiner with the add folding turned off in sd.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23258 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 16:09:19 +00:00
Nate Begeman
2300f55046 Add an option to the DAG Combiner to enable it for beta runs, and turn on 
that option for PowerPC's beta.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23253 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 00:15:36 +00:00
Nate Begeman
83e75ecd27 Next round of DAGCombiner changes. This version now passes all the tests 
I have run so far when run before Legalize.  It still needs to pick up the
SetCC folds, and nodes that use SetCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23243 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 04:43:02 +00:00
Nate Begeman
646d7e2727 Next round of DAG Combiner changes. Just need to support multiple return 
values, and then we should be able to hook it up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23231 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 21:18:40 +00:00
Nate Begeman
4ebd805c6a Implement first round of feedback from chris (there's still a couple things 
left to do).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23195 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:24:04 +00:00
Nate Begeman
4942a9687d Add the rest of the currently implemented visit routines to the switch 
statement in visit().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23185 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:33:32 +00:00
Nate Begeman
1d4d414111 First pass at the DAG Combiner. It isn't used anywhere yet, but it should 
be mostly functional.  It currently has all folds from SelectionDAG.cpp
that do not involve a condition code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23184 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:19:25 +00:00