http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35561
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-06-23
13:31:01 UTC ---
Well, we could still optimize it e.g. in leaf functions or in functions that
only call leaf functions (__attribute__((leaf))). But we do this
transformation during gimplification, so either we'd need to add an
optimization that would turn an automatic aggregate into static aggregate if
possible and useful later on (in particular, if it is determined to be never
written into and its value doesn't escape current function or current function
is leaf or only calls leaf functions and doesn't tail recurse), or we'd need to
do some analysis right before gimplification starts to find out if a function
must be leaf or only call leaf functions.
