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Author SHA1 Message Date
Bjorn Pettersson 529c8e8dc6 [InstSimplify] Simplify smul.fix and smul.fix.sat 
Add simplification of smul.fix and smul.fix.sat according to
  X * 0 -> 0
  X * undef -> 0
  X * (1 << scale) -> X

This includes the commuted patterns and splatted vectors.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D98299
 2021-03-12 09:09:58 +01:00