local-alloc.c (function_invariant_p): New function.

	* local-alloc.c (function_invariant_p): New function.
	(update_equiv_regs): Use function_invariant_p instead of CONSTANT_P
	to decide if an equivalence should be recorded.
	* reload1.c (num_eliminable_invariants): New static variable.
	(reload): Set it.  Use function_invariant_p instead of CONSTANT_P
	to decide if an equivalence should be recorded.
	Unshare PLUS.
	(calculate_needs_all_insns): Skip insns that only set an equivalence.
	Take num_eliminable_invariants into account when deciding
	if register elimination should be done.
	(reload_as_needed): Take num_eliminable_invariants into account
	when deciding if register elimination should be done.
	(eliminate_regs): Handle non-constant reg_equiv_constant.
	* rtl.h (function_invariant_p): Declare.

From-SVN: r24026

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index bf9a603..93e7842 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1440,6 +1440,7 @@ extern void init_optabs			PROTO ((void));
 extern void dump_local_alloc		PROTO ((FILE *));
 #endif
 extern void local_alloc			PROTO ((void));
+extern int function_invariant_p		PROTO ((rtx));
 
 /* In reload1.c */
 extern void reload_cse_regs		PROTO ((rtx));