[Bug bootstrap/46856] [4.6 regression] internal compiler error in final_scan_insn breaks m68k-linux bootstrap

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46856

--- Comment #3 from Mikael Pettersson <mikpe at it dot uu.se> 2010-12-09 23:48:36 UTC ---
A bisection identified r166371 as the trigger for this bug:

Author: jakub
Date: Fri Nov  5 19:00:27 2010
New Revision: 166371

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166371
Log:
    PR target/45670
    * expr.c (expand_expr_real_1) <case MEM_REF>: Use EXPAND_SUM
    instead of EXPAND_NORMAL for base expansion.

    * gcc.target/i386/pr45670.c: New test.

Reverting that change from gcc-4.6-20101204 prevents the ICE.