RA: Clear reg equiv caller_save_p flag when clearing defined_p flag

IRA can invalidate initially setup equivalence in setup_reg_equiv.
Flag caller_saved was not cleared during invalidation although
init_insns were cleared.  It resulted in segmentation fault in
get_equiv.  Clearing the flag solves the problem.  For more
precaution I added clearing the flag in other places too although it
might be not necessary.

        PR rtl-optimization/108774

gcc/ChangeLog:

	* ira.cc (ira_update_equiv_info_by_shuffle_insn): Clear equiv
	caller_save_p flag when clearing defined_p flag.
	(setup_reg_equiv): Ditto.
	* lra-constraints.cc (lra_constraints): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr108774.c: New.

0 files changed, 0 insertions, 0 deletions