Remove dead code in switch conv pass.

2019-11-14  Martin Liska  <mliska@suse.cz>

	* tree-switch-conversion.c (switch_conversion::switch_conversion):
	Do not initialize m_other_count.
	(switch_conversion::collect): Do not count m_default_count and
	m_other_count as we use frequencies for edges.
	* tree-switch-conversion.h: Remove m_default_count and m_other_count.

From-SVN: r278217

gcc/ChangeLog

 2019-11-14  Martin Liska  <mliska@suse.cz>
 
+	* tree-switch-conversion.c (switch_conversion::switch_conversion):
+	Do not initialize m_other_count.
+	(switch_conversion::collect): Do not count m_default_count and
+	m_other_count as we use frequencies for edges.
+	* tree-switch-conversion.h: Remove m_default_count and m_other_count.
+
+2019-11-14  Martin Liska  <mliska@suse.cz>
+
 	PR other/92329
 	* doc/invoke.texi: Document -fallocation-dce.
 

gcc/tree-switch-conversion.c

@@ -61,7 +61,7 @@ using namespace tree_switch_conversion;
 
 /* Constructor.  */
 
-switch_conversion::switch_conversion (): m_final_bb (NULL), m_other_count (),
+switch_conversion::switch_conversion (): m_final_bb (NULL),
   m_constructors (NULL), m_default_values (NULL),
   m_arr_ref_first (NULL), m_arr_ref_last (NULL),
   m_reason (NULL), m_default_case_nonstandard (false), m_cfg_altered (false)
@@ -89,10 +89,6 @@ switch_conversion::collect (gswitch *swtch)
   e_default = gimple_switch_default_edge (cfun, swtch);
   m_default_bb = e_default->dest;
   m_default_prob = e_default->probability;
-  m_default_count = e_default->count ();
-  FOR_EACH_EDGE (e, ei, m_switch_bb->succs)
-    if (e != e_default)
-      m_other_count += e->count ();
 
   /* Get upper and lower bounds of case values, and the covered range.  */
   min_case = gimple_switch_label (swtch, 1);

gcc/tree-switch-conversion.h

@@ -819,12 +819,6 @@ public:
   /* The probability of the default edge in the replaced switch.  */
   profile_probability m_default_prob;
 
-  /* The count of the default edge in the replaced switch.  */
-  profile_count m_default_count;
-
-  /* Combined count of all other (non-default) edges in the replaced switch.  */
-  profile_count m_other_count;
-
   /* Number of phi nodes in the final bb (that we'll be replacing).  */
   int m_phi_count;