cfgrtl.c (emit_insn_at_entry): New function.

	* cfgrtl.c (emit_insn_at_entry): New function.
	* rtl.h (emit_insn_at_entry): Declare it.
	* integrate.c (emit_initial_value_sets): Use it.

From-SVN: r116968

gcc/ChangeLog

@@ -5,6 +5,10 @@
 	expanding the number of iterations.
 	* config/bfin/bfin.c (bfin_rtx_costs): Handle UDIV, UMOD.
 
+	* cfgrtl.c (emit_insn_at_entry): New function.
+	* rtl.h (emit_insn_at_entry): Declare it.
+	* integrate.c (emit_initial_value_sets): Use it.
+
 2006-09-15  Kazu Hirata  <kazu@codesourcery.com>
 
 	* doc/tm.texi (TARGET_FUNCTION_VALUE): Put @deftypefn all in

gcc/cfgrtl.c

@@ -453,6 +453,20 @@ entry_of_function (void)
 	  BB_HEAD (ENTRY_BLOCK_PTR->next_bb) : get_insns ());
 }
 
+/* Emit INSN at the entry point of the function, ensuring that it is only
+   executed once per function.  */
+void
+emit_insn_at_entry (rtx insn)
+{
+  edge_iterator ei = ei_start (ENTRY_BLOCK_PTR->succs);
+  edge e = ei_safe_edge (ei);
+  if (!(e->flags & EDGE_FALLTHRU))
+    abort ();
+
+  insert_insn_on_edge (insn, e);
+  commit_edge_insertions ();
+}
+
 /* Update insns block within BB.  */
 
 void

gcc/integrate.c

@@ -294,7 +294,7 @@ emit_initial_value_sets (void)
   seq = get_insns ();
   end_sequence ();
 
-  emit_insn_after (seq, entry_of_function ());
+  emit_insn_at_entry (seq);
   return 0;
 }
 

gcc/rtl.h

@@ -2074,6 +2074,7 @@ extern rtx emit (rtx);
 extern void renumber_insns (void);
 extern rtx delete_insn (rtx);
 extern rtx entry_of_function (void);
+extern void emit_insn_at_entry (rtx);
 extern void delete_insn_chain (rtx, rtx);
 extern rtx unlink_insn_chain (rtx, rtx);
 extern rtx delete_insn_and_edges (rtx);