[Bug c/49551] common variables and -fdata-sections cause ICE in C front-end.

[dougkwan at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49551

--- Comment #1 from Doug Kwan <dougkwan at google dot com> 2011-06-27 20:47:59 UTC ---
The variable x in the test case is should not be a common variable but the
DECL_COMMON is set after merging the first and the second declarations.  That
ultimately leads to an ICE.