reload1.c (choose_reload_regs): Use mode sizes to check whether an old reload register completely defines the...

gcc/
	* reload1.c (choose_reload_regs): Use mode sizes to check whether
	an old reload register completely defines the required value.

gcc/testsuite/
	* gcc.target/arm/neon-modes-3.c: New test.

From-SVN: r175980