emit-rtl.c (last_call_insn, [...]): New functions.

	* emit-rtl.c (last_call_insn, add_function_usage_to): New functions.
	* rtl.h (last_call_insn, add_function_usage_to): New prototypes.
	* builtins.c (expand_builtin_apply): Use the new emit-rtl functions.
	* calls.c (emit_call_1): Likewise.
	(expand_call): For calls initializing constant memory, replace
	emission of standalone mem /u clobber with function usage entry.
	* expr.c (emit_block_move_via_libcall): Likewise.
	* cse.c (count_reg_usage, case EXPR_LIST): New case.
	* flow.c (propagate_one_insn): Pass entire operand of
	CALL_INSN_FUNCTION_USAGE to mark_used_regs.
	* integrate.c (try_constants): For CALL_INSNs, substitute constants
	within the FUNCTION_USAGE also.
	* loop.c (prescan_loop): Note clobbers of const mem mentioned in
	FUNCTION_USAGE lists.
	* reload1.c (replace_pseudos_in): Renamed.
	(reload): Use it for clobbers surviving until the end of the reload.

From-SVN: r66429

1 files changed, 41 insertions, 0 deletions

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 7048aee..a000551 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -3191,6 +3191,22 @@ prev_real_insn (insn)
   return insn;
 }
 
+/* Return the last CALL_INSN in the current list, or 0 if there is none.
+   This routine does not look inside SEQUENCEs.  */
+
+rtx
+last_call_insn ()
+{
+  rtx insn;
+
+  for (insn = get_last_insn ();
+       insn && GET_CODE (insn) != CALL_INSN;
+       insn = PREV_INSN (insn))
+    ;
+
+  return insn;
+}
+
 /* Find the next insn after INSN that really does something.  This routine
    does not look inside SEQUENCEs.  Until reload has completed, this is the
    same as next_real_insn.  */
@@ -3850,6 +3866,31 @@ remove_insn (insn)
     }
 }
 
+/* Append CALL_FUSAGE to the CALL_INSN_FUNCTION_USAGE for CALL_INSN.  */
+
+void
+add_function_usage_to (call_insn, call_fusage)
+     rtx call_insn, call_fusage;
+{
+  if (! call_insn || GET_CODE (call_insn) != CALL_INSN)
+    abort ();
+
+  /* Put the register usage information on the CALL.  If there is already
+     some usage information, put ours at the end.  */
+  if (CALL_INSN_FUNCTION_USAGE (call_insn))
+    {
+      rtx link;
+
+      for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0;
+	   link = XEXP (link, 1))
+	;
+
+      XEXP (link, 1) = call_fusage;
+    }
+  else
+    CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage;
+}
+
 /* Delete all insns made since FROM.
    FROM becomes the new last instruction.  */