Re: floating-point abuse in 2.1.113

Andi Kleen (ak@muc.de)
Thu, 6 Aug 1998 16:00:00 +0200


On Thu, Aug 06, 1998 at 03:23:01PM +0200, Richard B. Johnson wrote:
> It seems that gcc does not treat a short procedure like a large one.
> This may have something to do with resources available during a kernel
> compile???

If it is all contained in a single expression that is very unlikely.
fold-const operates on "tree"s build by the frontend for single expressions,
and it does not depend much on context.

For constant propagation it could make a difference, because the gcc backend
works with the RTL abstraction then and depends on context (e.g. various
optimizations are not done when the function contains gotos etc.)

-Andi

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