Sanjay Patel 0236c57181 [InstCombine] try to fold one-demanded-bit-of-multiply
This is a generalization of the icmp fold in D118061 (and that can be abandoned).
We're looking for a disguised form of "odd * odd must be odd".
Some Alive2 proofs to show correctness:
https://alive2.llvm.org/ce/z/60Y8hz
https://alive2.llvm.org/ce/z/HfAP6R

Differential Revision: https://reviews.llvm.org/D118539
2022-02-04 11:40:54 -05:00
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This directory contains test cases for the instcombine transformation.  The
dated tests are actual bug tests, whereas the named tests are used to test
for features that the this pass should be capable of performing.