r149778 - in /trunk/gcc: ChangeLog combine.c te...

[nemet@gcc.gnu.org]

Author: nemet
Date: Sat Jul 18 21:46:01 2009
New Revision: 149778

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149778
Log:
	* combine.c (simplify_shift_const_1): Split code to determine
	shift_mode into ...
	(try_widen_shift_mode): ... here.  Allow widening for ASHIFTRT if the
	new bits shifted in are identical to the old sign bit.

testsuite/
	* gcc.target/mips/octeon-exts-7.c: New test.
	* gcc.target/mips/octeon-exts-2.c: Revert previous change.
	* gcc.target/mips/octeon-exts-5.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/mips/octeon-exts-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/mips/octeon-exts-2.c
    trunk/gcc/testsuite/gcc.target/mips/octeon-exts-5.c