gcc/

gcc/
2011-09-11  Bernd Schmidt  <bernds@codesourcery.com>
	    Richard Sandiford  <rdsandiford@googlemail.com>

	* config/mips/mips.c (mips_epilogue): New structure.
	(mips16e_save_restore_reg): Queue REG_CFA_RESTORE notes when
	restoring registers.
	(mips_epilogue_emit_cfa_restores): New function.
	(mips_epilogue_set_cfa): Likewise.
	(mips_restore_reg): Queue REG_CFA_RESTORE notes.  When restoring
	the current CFA register from the stack, redefine the CFA in terms
	of the stack pointer.
	(mips_expand_epilogue): Set up mips_epilogue.  Attach CFA information
	to the epilogue instructions.

gcc/testsuite/
	* gcc.target/mips/mips.exp (mips_option_groups): Add debug options.
	* gcc.target/mips/interrupt_handler-2.c: New test.
	* gcc.target/mips/interrupt_handler-3.c: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178794 138bc75d-0d04-0410-961f-82ee72b054a4