r155134 - in /trunk/gcc: ChangeLog regrename.c

[bernds@gcc.gnu.org]

Author: bernds
Date: Thu Dec 10 18:03:05 2009
New Revision: 155134

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155134
Log:
	PR rtl-opt/42216
	* regrename.c: Error out if MAX_RECOG_OPERANDS is larger than
	HOST_BITS_PER_WIDE_INT.
	(verify_reg_in_set): New function, broken out of verify_reg_tracked.
	(verify_reg_tracked): Use it.
	(scan_rtx_reg): When seeing a use involving a superset of the
	registers in an existing chain, enlarge that chain.  Otherwise,
	allow subsets and set fail_current_block for all other kinds of
	overlap.
	(hide_operands): New argument UNTRACKED_OPERANDS; callers changed.
	Do not modify operands when the bit with the corresponding number
	is set in that bitmap.
	(build_def_use): When we see matching operands with different
	modes, don't set fail_current_block, but keep track of such
	operands in a bitmap if their registers aren't already tracked
	in an open chain.  Pass this bitmap to all hide_operands calls.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regrename.c