[IEPM] Introduce debug hook for inline entry point markers

The inline_entry hook will be given a definition in a later patch.

for  gcc/ChangeLog

	* debug.h (gcc_debug_hooks): Add inline_entry.
	* dbxout.c (dbx_debug_hooks, xcoff_debug_hooks): Likewise.
	* debug.c (do_nothing_debug_hooks): Likewise.
	* vmsdbgout.c (vmsdbg_debug_hooks): Likewise.
	* dwarf2out.c (dwarf2_debug_hooks): Likewise.
	(dwarf2_lineno_debug_hooks): Likewise.

From-SVN: r255570

gcc/ChangeLog

 2017-12-12  Alexandre Oliva <aoliva@redhat.com>
 
+	* debug.h (gcc_debug_hooks): Add inline_entry.
+	* dbxout.c (dbx_debug_hooks, xcoff_debug_hooks): Likewise.
+	* debug.c (do_nothing_debug_hooks): Likewise.
+	* vmsdbgout.c (vmsdbg_debug_hooks): Likewise.
+	* dwarf2out.c (dwarf2_debug_hooks): Likewise.
+	(dwarf2_lineno_debug_hooks): Likewise.
+
 	* common.opt (gstatement-frontiers): New, setting
 	debug_nonbind_markers_p.
 	* rtl.h (MAY_HAVE_DEBUG_MARKER_INSNS): Activate.

gcc/dbxout.c

@@ -384,6 +384,7 @@ const struct gcc_debug_hooks dbx_debug_hooks =
   debug_nothing_rtx_code_label,	         /* label */
   dbxout_handle_pch,		         /* handle_pch */
   debug_nothing_rtx_insn,	         /* var_location */
+  debug_nothing_tree,	         	 /* inline_entry */
   debug_nothing_tree,			 /* size_function */
   dbxout_switch_text_section,            /* switch_text_section */
   debug_nothing_tree_tree,		 /* set_name */
@@ -426,6 +427,7 @@ const struct gcc_debug_hooks xcoff_debug_hooks =
   debug_nothing_rtx_code_label,	         /* label */
   dbxout_handle_pch,		         /* handle_pch */
   debug_nothing_rtx_insn,	         /* var_location */
+  debug_nothing_tree,	         	 /* inline_entry */
   debug_nothing_tree,			 /* size_function */
   debug_nothing_void,                    /* switch_text_section */
   debug_nothing_tree_tree,	         /* set_name */

gcc/debug.c

@@ -55,6 +55,7 @@ const struct gcc_debug_hooks do_nothing_debug_hooks =
   debug_nothing_rtx_code_label,	         /* label */
   debug_nothing_int,		         /* handle_pch */
   debug_nothing_rtx_insn,	         /* var_location */
+  debug_nothing_tree,	         	 /* inline_entry */
   debug_nothing_tree,			 /* size_function */
   debug_nothing_void,                    /* switch_text_section */
   debug_nothing_tree_tree,		 /* set_name */

gcc/debug.h

@@ -176,6 +176,9 @@ struct gcc_debug_hooks
   /* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note.  */
   void (* var_location) (rtx_insn *);
 
+  /* Called from final_scan_insn for any NOTE_INSN_INLINE_ENTRY note.  */
+  void (* inline_entry) (tree block);
+
   /* Called from finalize_size_functions for size functions so that their body
      can be encoded in the debug info to describe the layout of variable-length
      structures.  */

gcc/dwarf2out.c

@@ -2753,6 +2753,7 @@ const struct gcc_debug_hooks dwarf2_debug_hooks =
   debug_nothing_rtx_code_label,	/* label */
   debug_nothing_int,		/* handle_pch */
   dwarf2out_var_location,
+  debug_nothing_tree,		/* inline_entry */
   dwarf2out_size_function,	/* size_function */
   dwarf2out_switch_text_section,
   dwarf2out_set_name,
@@ -2793,6 +2794,7 @@ const struct gcc_debug_hooks dwarf2_lineno_debug_hooks =
   debug_nothing_rtx_code_label,	         /* label */
   debug_nothing_int,		         /* handle_pch */
   debug_nothing_rtx_insn,	         /* var_location */
+  debug_nothing_tree,	         	 /* inline_entry */
   debug_nothing_tree,			 /* size_function */
   debug_nothing_void,                    /* switch_text_section */
   debug_nothing_tree_tree,		 /* set_name */

gcc/vmsdbgout.c

@@ -206,6 +206,7 @@ const struct gcc_debug_hooks vmsdbg_debug_hooks
    debug_nothing_rtx_code_label,  /* label */
    debug_nothing_int,		  /* handle_pch */
    debug_nothing_rtx_insn,	  /* var_location */
+   debug_nothing_tree,	          /* inline_entry */
    debug_nothing_tree,		  /* size_function */
    debug_nothing_void,            /* switch_text_section */
    debug_nothing_tree_tree,	  /* set_name */