Minor regressions from removal of non-linear behavior from simplifier

#13379 (closed) exposed non-linear behavior simplifying certain nested function applications. Simon PJ fixed that in a1b753e8, and then made an adjustment in 29d88ee1. Gipeda revealed a couple of small regressions from this combination (I'm not sure which did what, but IIRC the second patch mostly fixed regressions in the first).

nofib/time/cryptarithm1   time increases 4.87% from 0.513s to 0.538s
nofib/size/scs            code size increases  5.28% from 1224890 bytes to 1289570 bytes

Note that there are a few comments on #13397 (closed) relating to these regressions.

Trac metadata

Trac field	Value
Version	8.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	Compiler
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