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

[markus at trippelsdorf dot de]

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



Markus Trippelsdorf <markus at trippelsdorf dot de> changed:



           What    |Removed                     |Added

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                 CC|                            |markus at trippelsdorf dot

                   |                            |de



--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 
2012-11-06 15:31:43 UTC ---

Here is a reduced testcase that still uses over 2GB of RAM in all

supported gcc versions:



markus@x4 tmp % cat test.i

typedef enum

{ b }

zn_type;

int x, a1_1_2, a1_1_8, a1_1_4, a1_1_3, a1_0, a1_0_0, a1_1_5;

double a2_0_1;

const int a2_1_4;

const zn_type a2_0;

void

fn1 ()

{

    a1_0_0 =

        (a1_0 ? a1_1_2 : a1_0 ? a1_1_3 : a1_0 ? a1_1_4 : a1_0 ? a1_1_5 :

         a1_0 ? a1_1_3 : a1_0 ? a1_1_4 : a1_0 ? a1_1_8 : x) +

        (a2_0 ? : a2_0 ? : a2_0 ? : a2_0 ? : a2_0 ? : a2_0 ? : a2_0 ? : a2_0 ?

:

         a2_0 ? : a2_0 ? : a2_0 ? a2_0_1 : a2_0 ? : 0 ? : a2_0 ? : a2_0 ? :

         a2_0 ?  : a2_0 ? : a2_0 ? : a2_0 ? a2_1_4 : a2_0 ? : x);

}



markus@x4 tmp % ulimit -v 2000000

markus@x4 tmp % gcc -c test.i

virtual memory exhausted: Cannot allocate memory