[Bug target/47540] ARM THUMB crash with complex numbers

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47540

--- Comment #6 from Mikael Pettersson <mikpe at it dot uu.se> 2011-02-01 10:11:52 UTC ---
The bug started to occur at r140501:

Author: pinskia
Date: Fri Sep 19 22:24:06 2008
New Revision: 140501

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140501
Log:
2008-09-19  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        PR tree-opt/30930
        * tree-ssa.c (execute_update_addresses_taken): Also update
        DECL_GIMPLE_REG_P for vector and complex types.

But given Ian's observation and proposed patch I suspect r140501 is innocent
and merely triggers a bug in the ARM backend.