http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54157
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-08-01 16:25:15 UTC --- [hjl@gnu-32 gcc]$ cat /tmp/x.i struct s2{ int n[24 -1][24 -1][24 -1]; }; struct test2{ struct s2 e; }; struct test2 tmp2[4]; void main1 () { int i,j; for (i = 0; i < 24 -4; i++) for (j = 0; j < 24 -4; j++) tmp2[2].e.n[1][i][j] = 8; } [hjl@gnu-32 gcc]$ ./xgcc -B./ -O2 -mx32 -maddress-mode=long -S /tmp/x.i -ftree-vectorize /tmp/x.i: In function ‘main1’: /tmp/x.i:18:1: internal compiler error: in plus_constant, at explow.c:88 } ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. [hjl@gnu-32 gcc]$