[Bug middle-end/51770] New: dump gimple lineno when dumping bb

["nash11228 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51770

             Bug #: 51770
           Summary: dump gimple lineno when dumping bb
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: nash11228@gmail.com


Hi all,

  I know gcc can dump lineno information before each gimple statement.
[filename : line:col] gimple statement.
 But it's not convenient to look, too much lineno's and no alignment again.

how about dump lineno at bb level just before gimple statement when lineno
changes ?

# line 11
gs1
gs2
...
# line 12
...

just like dwarf debugging information format.

here is example code


--- gimple-pretty-print.c    (revision 182877)
+++ gimple-pretty-print.c    (working copy)
@@ -2284,6 +2284,7 @@
   gimple_stmt_iterator gsi;
   gimple stmt;
   int label_indent = indent - 2;
+  int lineno = 0;

   if (label_indent < 0)
     label_indent = 0;
@@ -2299,6 +2300,15 @@

       curr_indent = gimple_code (stmt) == GIMPLE_LABEL ? label_indent :
indent;

+      if (gimple_lineno (stmt) != lineno)
+        {
+          lineno = gimple_lineno (stmt);
+
+          INDENT (curr_indent);
+          pp_printf (buffer, "# line %d", lineno);
+          pp_newline (buffer);
+        }
+      
       INDENT (curr_indent);
       dump_gimple_stmt (buffer, stmt, curr_indent, flags);
       pp_newline (buffer);