[Bug other/59920] [4.9 Regression] build doesn't terminate (at least after an hour)

ebotcazou at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Jan 24 18:55:00 GMT 2014


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59920

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

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

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> -g isn't needed to reproduce this.  Started with r198096, the huge function
> with ~ 5000 or how many basic blocks has over 200 setjmp calls in it, so
> starting with the r198096 commit we create probably about 1000 or so more
> basic blocks, hundreds of thousands abnormal edges (but still *.cfg dump is
> emitted quickly), I think all the memory is eaten by huge PHI argument lists.

It's precisely for this kind of situation that the "weirdo" (your word IIRC :-)
lowering of __builtin_setjmp was added.  Maybe something similar could be done.



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