re PR target/48250 (ICE in reload_cse_simplify_operands, at postreload.c:403)

re PR target/48250 (ICE in reload_cse_simplify_operands, at postreload.c:403)

2011-04-11  Chung-Lin Tang  <cltang@codesourcery.com>
	    Richard Earnshaw  <rearnsha@arm.com>

	PR target/48250
	* config/arm/arm.c (arm_legitimize_reload_address): Update cases
	to use sign-magnitude offsets. Reject unsupported unaligned
	cases. Add detailed description in comments.
	* config/arm/arm.md (reload_outdf): Disable for ARM mode; change
	condition from TARGET_32BIT to TARGET_ARM.

Co-Authored-By: Richard Earnshaw <rearnsha@arm.com>
From-SVN: r172297