[LLVMdev] ISel Pattern Preferences

David Greene dag at cray.com
Mon Apr 6 11:47:58 PDT 2009

On Monday 06 April 2009 13:31, David Greene wrote:
> What's a reliable way to prefer one patterns over another?  I have two
> patterns with different predicates.  Pattern A has a very general predicate
> to catch a wide variety of store instructions.  Pattern B has a narrower
> predicate meant to catch very specific store instructions that would also
> satisfy the predicate for Pattern A.
> We used to match Pattern B just fine but after changing .td files a bit the
> selector is always picking Pattern A.
> Setting AddedComplexity doesn't seem to help.

Urk.  I set AddedComplexity on the wrong thing.  Seems to work now.


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