[gcc r12-5049] Cleanup path solver dumps.

[Aldy Hernandez <aldyh@gcc.gnu.org>]

https://gcc.gnu.org/g:2fc9b4d7b0cbc88e9986486329abe899a07729de

commit r12-5049-g2fc9b4d7b0cbc88e9986486329abe899a07729de
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Tue Nov 9 10:43:25 2021 +0100

    Cleanup path solver dumps.
    
    This patch makes the path solver dumps a bit more consistent.
    
    Tested on x86-64 Linux.
    
    gcc/ChangeLog:
    
            * gimple-range-path.cc (path_range_query::dump): Clean up.
            (path_range_query::compute_ranges): Same.
            * value-relation.cc (path_oracle::dump): Same.

Diff:
---
 gcc/gimple-range-path.cc | 11 ++++-------
 gcc/value-relation.cc    |  6 +++++-
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/gcc/gimple-range-path.cc b/gcc/gimple-range-path.cc
index 52de10369f3..99ac947581b 100644
--- a/gcc/gimple-range-path.cc
+++ b/gcc/gimple-range-path.cc
@@ -98,7 +98,6 @@ path_range_query::dump (FILE *dump_file)
   unsigned i;
   bitmap_iterator bi;
 
-  fprintf (dump_file, "\nPath is (length=%d):\n", m_path->length ());
   dump_ranger (dump_file, *m_path);
 
   fprintf (dump_file, "Imports:\n");
@@ -505,7 +504,7 @@ path_range_query::compute_ranges (const vec<basic_block> &path,
 				  const bitmap_head *imports)
 {
   if (DEBUG_SOLVER)
-    fprintf (dump_file, "\n*********** path_range_query ******************\n");
+    fprintf (dump_file, "\n==============================================\n");
 
   set_path (path);
   bitmap_copy (m_imports, imports);
@@ -519,13 +518,13 @@ path_range_query::compute_ranges (const vec<basic_block> &path,
 
   if (DEBUG_SOLVER)
     {
-      fprintf (dump_file, "\npath_range_query: compute_ranges for path: ");
+      fprintf (dump_file, "path_range_query: compute_ranges for path: ");
       for (unsigned i = path.length (); i > 0; --i)
 	{
 	  basic_block bb = path[i - 1];
-	  fprintf (dump_file, "BB %d", bb->index);
+	  fprintf (dump_file, "%d", bb->index);
 	  if (i > 1)
-	    fprintf (dump_file, ", ");
+	    fprintf (dump_file, "->");
 	}
       fprintf (dump_file, "\n");
     }
@@ -557,9 +556,7 @@ path_range_query::compute_ranges (const vec<basic_block> &path,
 
   if (DEBUG_SOLVER)
     {
-      fprintf (dump_file, "\npath_oracle:\n");
       get_path_oracle ()->dump (dump_file);
-      fprintf (dump_file, "\n");
       dump (dump_file);
     }
 }
diff --git a/gcc/value-relation.cc b/gcc/value-relation.cc
index a0105481466..9c3ecd94b13 100644
--- a/gcc/value-relation.cc
+++ b/gcc/value-relation.cc
@@ -1448,10 +1448,14 @@ void
 path_oracle::dump (FILE *f) const
 {
   equiv_chain *ptr = m_equiv.m_next;
+  relation_chain *ptr2 = m_relations.m_head;
+
+  if (ptr || ptr2)
+    fprintf (f, "\npath_oracle:\n");
+
   for (; ptr; ptr = ptr->m_next)
     ptr->dump (f);
 
-  relation_chain *ptr2 = m_relations.m_head;
   for (; ptr2; ptr2 = ptr2->m_next)
     {
       fprintf (f, "Relational : ");