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Re: GCSE store motion


<  If the optimization makes the compiler go slower when compiling itself,
  it ain't worth having.
>

I think that's much too harsh. For example a thorough job of software loop
pipelining using the rotating registers of the ia64 may require *quite*
a bit of compilation time, and since this optimization is unlikely to help
GCC itself much that seems unfortunate.

Perhaps a more appropriate rule is that this is the criterion for putting
an optimization in -O1.


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