Easwaran Raman 617f63640b Refactor instruction simplification code in visitors. NFC. ...

Several visitors check if operands to the instruction are constants,
either as it is or after looking up SimplifiedValues, check if the
result is a constant and update the SimplifiedValues map. This
refactoring splits it into a common function that does the checking of
whether the operands are constants and updating of the SimplifiedValues
table, and an instruction specific part that is implemented by each
instruction visitor as a lambda and passed to the common function.

Differential revision: https://reviews.llvm.org/D30104

llvm-svn: 295552

2017-02-18 17:22:52 +00:00

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