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2015-07-10 16:53 GMT+02:00 escha <escha@apple.com>:

If you write a target-specific combine that conflicts with a canonicalization, it’ll infinite loop because it’ll oscillate between the two forms.

I saw that ;-)

However, I used DAGCombinerInfo::CombineTo(oldNode, newNode, false) to prevent DAGCombiner to add the returned SDValue to worklist and recombine it back to the canical form.

Did I miss the purpose of CombineTo ?

fred