Alexandros Lamprineas ced90d1ff6 [FuncSpec] Improve the accuracy of the cost model. ...

Instead of blindly traversing the use-def chain of constant arguments,
compute known constants along the way. Stop as soon as a user cannot
be replaced by a constant. Keep it light-weight by handling some basic
instruction types.

Differential Revision: https://reviews.llvm.org/D150464

2023-05-24 11:40:12 +01:00

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