plugin event for C frontend trees

[Brian Hackett]

Hi, this adds a plugin event PLUGIN_C_PRE_GENERICIZE for accessing the
C frontend trees, analogous to the existing
PLUGIN_CXX_CP_PRE_GENERICIZE for the C++ frontend trees.  There didn't
seem to be any way previously to access the C trees from a plugin.  (I
don't have a copyright assignment with the FSF, is that necessary for
this patch?).  Thanks,

Brian Hackett


2009-12-18  Brian Hackett  <bhackett1024@gmail.com>

	* plugin.def: Add plugin event for C frontend pre-genericize.
	* plugin.c (register_callback, invoke_plugin_callbacks): Same.
	* c-decl.c (finish_function): Invoke callbacks on above event.


Index: gcc/plugin.def
===================================================================
--- gcc/plugin.def	(revision 155348)
+++ gcc/plugin.def	(working copy)
@@ -30,6 +30,9 @@ DEFEVENT (PLUGIN_FINISH_UNIT)
 /* Allows to see low level AST in C++ FE.  */
 DEFEVENT (PLUGIN_CXX_CP_PRE_GENERICIZE)

+/* Allows to see low level AST in C FE. */
+DEFEVENT (PLUGIN_C_PRE_GENERICIZE)
+
 /* Called before GCC exits.  */
 DEFEVENT (PLUGIN_FINISH)

Index: gcc/c-decl.c
===================================================================
--- gcc/c-decl.c	(revision 155348)
+++ gcc/c-decl.c	(working copy)
@@ -8052,6 +8052,7 @@ finish_function (void)
     {
       if (!decl_function_context (fndecl))
 	{
+	  invoke_plugin_callbacks (PLUGIN_C_PRE_GENERICIZE, fndecl);
 	  c_genericize (fndecl);

 	  /* ??? Objc emits functions after finalizing the compilation unit.
Index: gcc/plugin.c
===================================================================
--- gcc/plugin.c	(revision 155348)
+++ gcc/plugin.c	(working copy)
@@ -403,6 +403,7 @@ register_callback (const char *plugin_na
       case PLUGIN_START_UNIT:
       case PLUGIN_FINISH_UNIT:
       case PLUGIN_CXX_CP_PRE_GENERICIZE:
+      case PLUGIN_C_PRE_GENERICIZE:
       case PLUGIN_GGC_START:
       case PLUGIN_GGC_MARKING:
       case PLUGIN_GGC_END:
@@ -484,6 +485,7 @@ invoke_plugin_callbacks (int event, void
       case PLUGIN_START_UNIT:
       case PLUGIN_FINISH_UNIT:
       case PLUGIN_CXX_CP_PRE_GENERICIZE:
+      case PLUGIN_C_PRE_GENERICIZE:
       case PLUGIN_ATTRIBUTES:
       case PLUGIN_PRAGMAS:
       case PLUGIN_FINISH: