Found it.  It only occurs with -mcpu=cortex-a8:
  
~/linaro/toolchains/gcc-4.7~svn182617-armv7l-natty-cbuild220-tcpanda05-cortexa9r1/bin/g++
 -O2 -c -g -mfpu=vfpv3-d16 -mcpu=cortex-a8 lp910791.ii

The fault occurs in r178025, 178624, 182152, 182780 but not in 177688 so
it was introduced somewhere between 177688 and 178025.

Assuming the bug is in config/arm then it could be 177689 (rsandifo),
177705 (ramana), 177759 (ramana), 177852 (ramana), 177855 (rsandifo),
177891 (jye2), or 177902 (ams).  I'm suspicious of 177759.

Matthias, could you log this upsteam?

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https://bugs.launchpad.net/bugs/910791

Title:
  [armhf] trunk 20111223, ICE in output_move_double, at config/arm/arm.c

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