[LLVMdev] difference between pattern and dag2dag isels

Alkis Evlogimenos evlogimenos at gmail.com
Fri Aug 19 02:49:47 PDT 2005

What's the difference between the pattern and the dag2dag instruction 
 It seems that the pattern selector does not preserve the original dag but 
the dag2dag one does. Is this done so that scheduling/other opts can be 
performed more easily in the generated machine code?


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