re PR middle-end/82123 (spurious -Wformat-overflow warning for converted vars)

	PR middle-end/82123
	PR tree-optimization/81592
	PR middle-end/79257
	* gimple-ssa-evrp-analyze.c (evrp_range_analyzer::enter): Do nothing
	if not optimizing.
	(evrp_range_analyzer::record_ranges_from_stmt): Likewise.
	(evrp_range_analyzer::pop_to_marker): Likewise.

From-SVN: r257851

gcc/ChangeLog

+2018-02-20  Jeff Law  <law@redhat.com>
+
+	PR middle-end/82123
+	PR tree-optimization/81592
+	PR middle-end/79257
+	* gimple-ssa-evrp-analyze.c (evrp_range_analyzer::enter): Do nothing
+	if not optimizing.
+	(evrp_range_analyzer::record_ranges_from_stmt): Likewise.
+	(evrp_range_analyzer::pop_to_marker): Likewise.
+
 2018-02-20  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	PR tree-optimization/84419

gcc/gimple-ssa-evrp-analyze.c

@@ -69,6 +69,8 @@ evrp_range_analyzer::push_marker ()
 void
 evrp_range_analyzer::enter (basic_block bb)
 {
+  if (!optimize)
+    return;
   push_marker ();
   record_ranges_from_incoming_edge (bb);
   record_ranges_from_phis (bb);
@@ -279,6 +281,9 @@ evrp_range_analyzer::record_ranges_from_stmt (gimple *stmt, bool temporary)
 {
   tree output = NULL_TREE;
 
+  if (!optimize)
+    return;
+
   if (dyn_cast <gcond *> (stmt))
     ;
   else if (stmt_interesting_for_vrp (stmt))
@@ -390,6 +395,8 @@ evrp_range_analyzer::pop_to_marker (void)
 void
 evrp_range_analyzer::leave (basic_block bb ATTRIBUTE_UNUSED)
 {
+  if (!optimize)
+    return;
   pop_to_marker ();
 }