[PATCH] Fix PPC combine ICE

[David Edelsohn]

>>>>> Alexandre Oliva writes:

>> I think the original RTL generation creating the CONST_INT
>> should have performed that.

Alexandre> Agreed.

	So where should this be done?

	Maybe we should add this sanity check to force_reg() as well.
That seems to be part of the problem.  We hand force_reg() a CONST_INT and
a mode.  It blindly places the CONST_INT into a REG and sets a REG_EQUAL
note, but never checks that the CONST_INT is valid for the mode.

David