Andrew Trick 9aa2523393 Add a CanonicalizeInstruction utility. ...

CanonicalizeInstruction will be a superset of
simplifyInstruction (once all the transforms are fixed for ownership
SIL). Additionally, it will also include simple SSA-based
canonicalization that requires new instruction creation. It may not
perform any optimization that interferes with diagnostics or increases
compile time.

Canonicalization replaces simplifyInstruction in SILCombine so we can
easily factor some existing SILCombine transforms into canonicalization.

2019-05-06 09:36:07 -07:00

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