alias.c (static_reg_base_value): New to hold RTL for items allocated once per function for the aliasing code.

	* alias.c (static_reg_base_value): New to hold RTL for
	items allocated once per function for the aliasing code.
	(init_alias_once_per_function): Initialize static_reg_base_value.
	(init_alias_analysis): Avoid throw-away allocations of RTL by
	using pre-computed values in static_reg_base_value.
	* function.c (prepare_function_start): Call
	init_alias_once_per_function appropriately.
	* rtl.h (init_alias_once_per_function): Declare.
	* caller-save (init_caller_save): Restructure slightly to
	avoid lots of silly RTL generation.
	* expr.c (init_expr_once): Likewise.
	* reload1.c (reload_cse_regs_1): Allocate throw-away register
	RTL object here.  Pass it into children.
	(reload_cse_simplify_operands): Use passed-in register RTL
	object.
	(reload_cse_simplify): Pass through throw-away register
	RTL object.

From-SVN: r54442

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/function.c b/gcc/function.c
index d1f4e89..96c2563 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -6208,6 +6208,9 @@ prepare_function_start ()
   /* Initialize the RTL mechanism.  */
   init_emit ();
 
+  /* Do per-function initialization of the alias analyzer.  */
+  init_alias_once_per_function ();
+
   /* Initialize the queue of pending postincrement and postdecrements,
      and some other info in expr.c.  */
   init_expr ();