[Bug c++/46096] Code produces two different outputs when optimized respectively with -O2 and without it.

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46096

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-10-20 
14:27:18 UTC ---
The field is not volatile, so in the loop nothing forces ->number field to be
loaded from memory again.
So it is perfectly fine to optize the whole loop into:
if (alpha1->number!=4)
  for (;;); /* Endless loop.  */