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Re: "-fno-unswitch-loops" option have no effect?

On 08/17/2009 02:32 PM, ami_stuff wrote:
Hi,

Works fine for me.  gcc.dg/tree-ssa/loop-6.c is unswitched with -O3
but not with -O3 -fno-unswitch-loops.

This one works for me too.

Could you try to compile "deflate.c" from libz?

Here are my results:

-m68060 -O3 -fno-unswitch-loops                                                            - 12,9kb
-m68060 -O3                                                                                - 12,9kb
-m68060 -O2 -finline-functions -fgcse-after-reload -ftree-vectorize -fpredictive-commoning - 12,4kb

And why do you think that loop unswitching has anything to do with the size growth?

BTW, -O3 is not guaranteed to give better performance than -O2.

Paolo

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