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55 Commits

Author SHA1 Message Date
Jacques Pienaar 47e7cd333e Use FuncBuilder instead of MLFuncBuilder in pattern matcher. 
Use the general function buil wrapper instead of the CFG/ML specific one.

PiperOrigin-RevId: 217335607
 2019-03-29 13:31:59 -07:00
Chris Lattner 80e884a9f8 Add constant folding and binary operator reassociation to the canonicalize 
pass, build up the worklist infra in anticipation of improving the pattern
matcher to match more than one node.

PiperOrigin-RevId: 217330579
 2019-03-29 13:31:44 -07:00
Feng Liu 0faf563383 Move Pattern and related classes to a different file 
So we can use it as a library.

PiperOrigin-RevId: 217267049
 2019-03-29 13:31:03 -07:00
Chris Lattner 7e7157fd1d Various improvements to pattern matching and other infra: 
- Make it so OpPointer implicitly converts to SSAValue* when the underlying op
   has a single value.  This eliminates a lot more ->getResult() calls and makes
   the behavior more LLVM-like
 - Fill out PatternBenefit to be typed instead of just a typedef for int with
   magic numbers.
 - Simplify various code due to these changes.

PiperOrigin-RevId: 217020717
 2019-03-29 13:29:49 -07:00
Chris Lattner 9e3b928e32 Implement a super sketched out pattern match/rewrite framework and a sketched 
out canonicalization pass to drive it, and a simple (x-x) === 0 pattern match
as a test case.

There is a tremendous number of improvements that need to land, and the
matcher/rewriter and patterns will be split out of this file, but this is a
starting point.

PiperOrigin-RevId: 216788604
 2019-03-29 13:29:07 -07:00