[Bug middle-end/55219] [4.7/4.8 regression] attempting to compile a pre-processed unit eats up memory until OOM kills the cc1 process

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55219



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



           What    |Removed                     |Added

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                 CC|                            |ebotcazou at gcc dot

                   |                            |gnu.org, jakub at gcc dot

                   |                            |gnu.org



--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-07 
14:12:57 UTC ---

I believe this has been introduced by

http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158274

aka

http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00627.html

change, particularly fold_binary_op_with_conditional_arg part of the patch.

arg is not constant, doesn't have TREE_SIDE_EFFECTS, but is a huge expression

with lots of COND_EXPRs in it, nested.