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RFA (print-tree): PATCH for printing VEC(tree) in gdb


This patch adds a 'pvt' command to GDB for printing VEC(tree,...)* so that I don't have to keep writing $.base.vec[0].

It also adds a 'pdd' command for dwarf2out DIE nodes which I've had locally for a while.

Finally, it changes handling of TREE_VEC to print fully (depending on indentation level) elements of the vector; I find the current behavior inconvenient, as the brief representation is almost never enough information.

OK for trunk?
commit 03c534b28302c1f13d9626404ebb173e86d10a8b
Author: Jason Merrill <jason@redhat.com>
Date:   Mon May 24 11:51:07 2010 -0400

    	* print-tree.c (debug_vec_tree): New fn.
    	(print_vec_tree): New fn.
    	* tree.h: Declare them.
    	* gdbinit.in (ptv): New command.
    
    	* print-tree.c (print_node) [TREE_VEC]: Print elements normally.
    
    	* gdbinit.in (pdd): New command.

diff --git a/gcc/gdbinit.in b/gcc/gdbinit.in
index 22c99a7..e2375b2 100644
--- a/gcc/gdbinit.in
+++ b/gcc/gdbinit.in
@@ -122,6 +122,22 @@ document ptn
 Print the name of the type-node that is $.
 end
 
+define pvt
+set debug_vec_tree ($)
+end
+
+document pvt
+Print the VEC(tree) that is in $.
+end
+
+define pdd
+set debug_dwarf_die ($)
+end
+
+document pdd
+Print the dw_die_ref that is in $.
+end
+
 define prc
 output (enum rtx_code) $.code
 echo \ (
diff --git a/gcc/print-tree.c b/gcc/print-tree.c
index f1a2455..0c23188 100644
--- a/gcc/print-tree.c
+++ b/gcc/print-tree.c
@@ -60,6 +60,20 @@ debug_tree (tree node)
   putc ('\n', stderr);
 }
 
+/* Print the vector of trees VEC on standard error, for debugging.
+   Most nodes referred to by this one are printed recursively
+   down to a depth of six.  */
+
+void
+debug_vec_tree (VEC(tree,gc) *vec)
+{
+  table = XCNEWVEC (struct bucket *, HASH_SIZE);
+  print_vec_tree (stderr, "", vec, 0);
+  free (table);
+  table = 0;
+  putc ('\n', stderr);
+}
+
 /* Print PREFIX and ADDR to FILE.  */
 void
 dump_addr (FILE *file, const char *prefix, const void *addr)
@@ -860,8 +874,7 @@ print_node (FILE *file, const char *prefix, tree node, int indent)
 	      {
 		char temp[10];
 		sprintf (temp, "elt %d", i);
-		indent_to (file, indent + 4);
-		print_node_brief (file, temp, TREE_VEC_ELT (node, i), 0);
+		print_node (file, temp, TREE_VEC_ELT (node, i), indent + 4);
 	      }
 	  break;
 
@@ -979,3 +992,27 @@ print_node (FILE *file, const char *prefix, tree node, int indent)
 
   fprintf (file, ">");
 }
+
+/* Print the tree vector VEC in full on file FILE, preceded by PREFIX,
+   starting in column INDENT.  */
+
+void
+print_vec_tree (FILE *file, const char *prefix, VEC(tree,gc) *vec, int indent)
+{
+  tree elt;
+  unsigned ix;
+
+  /* Indent to the specified column, since this is the long form.  */
+  indent_to (file, indent);
+
+  /* Print the slot this node is in, and its code, and address.  */
+  fprintf (file, "%s <VEC", prefix);
+  dump_addr (file, " ", vec);
+
+  for (ix = 0; VEC_iterate (tree, vec, ix, elt); ++ix)
+    {
+      char temp[10];
+      sprintf (temp, "elt %d", ix);
+      print_node (file, temp, elt, indent + 4);
+    }
+}
diff --git a/gcc/tree.h b/gcc/tree.h
index 5f0098c..5acadb4 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -5120,9 +5120,11 @@ extern void print_rtl (FILE *, const_rtx);
 
 /* In print-tree.c */
 extern void debug_tree (tree);
+extern void debug_vec_tree (VEC(tree,gc) *);
 #ifdef BUFSIZ
 extern void dump_addr (FILE*, const char *, const void *);
 extern void print_node (FILE *, const char *, tree, int);
+extern void print_vec_tree (FILE *, const char *, VEC(tree,gc) *, int);
 extern void print_node_brief (FILE *, const char *, const_tree, int);
 extern void indent_to (FILE *, int);
 #endif

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