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RFA: RL78: Add -fstack-usage support


Hi DJ,

  Please could I apply the patch below to the RL78 port ?  It adds
  support for generating stack use info with the -fstack-usage option.

  Also - may I apply this patch to the 4.7 branch as well please ?

Cheers
  Nick

gcc/ChangeLog
2012-04-04  Nick Clifton  <nickc@redhat.com>

	* config/rl78/rl78.c (rl78_expand_prologue): Set stack use
	information, if requested.

Index: gcc/config/rl78/rl78.c
===================================================================
--- gcc/config/rl78/rl78.c	(revision 186130)
+++ gcc/config/rl78/rl78.c	(working copy)
@@ -827,6 +827,9 @@
   if (!cfun->machine->computed)
     rl78_compute_frame_info ();
 
+  if (flag_stack_usage)
+    current_function_static_stack_size = cfun->machine->framesize;
+
   for (i = 0; i < 16; i++)
     if (cfun->machine->need_to_push [i])
       {


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