r191995 - in /trunk/gcc: ChangeLog ira-build.c ...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Tue Oct  2 19:34:38 2012
New Revision: 191995

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191995
Log:
gcc/
	* ira.h (target_ira): Add x_ira_class_singleton.
	(ira_class_singleton): New macro.
	* ira.c (setup_prohibited_class_mode_regs): Set up ira_class_singleton.
	* ira-build.c (update_conflict_hard_reg_costs): Use
	ira_class_singleton to check for classes with a single
	allocatable register.
	* ira-lives.c (ira_implicitly_set_insn_hard_regs): Likewise.
	(single_reg_class): Likewise.  When more than one class is specified,
	check whether they have the same singleton register.
	(process_single_reg_class_operands): Require single_reg_class
	to return NO_REGS or a class with a single allocatable register.
	Obtain that register from ira_class_singleton.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-build.c
    trunk/gcc/ira-lives.c
    trunk/gcc/ira.c
    trunk/gcc/ira.h