ipa-cp: New debug counters for IPA-CP

[Martin Jambor]

Hi,

Martin Liška has been asking me to add debug counters to the IPA-CP pass so
that testcase reductions are easier.  The pass already has one for the bit
value propagation, so this patch adds one for value_range propagation
and one for the actual constant propagation.

Passed bootstrap and testing on x86_64-linux.  OK for trunk?

Thanks,

Martin


gcc/ChangeLog:

2020-10-30  Martin Jambor  <mjam...@suse.cz>

        * dbgcnt.def (ipa_cp_values): New counter.
        (ipa_cp_vr): Likewise.
        * ipa-cp.c (decide_about_value): Check and bump ipa_cp_values debug
        counter.
        (decide_whether_version_node): Likewise.
        (ipcp_store_vr_results):Check and bump ipa_cp_vr debug counter.
---
 gcc/dbgcnt.def |  2 ++
 gcc/ipa-cp.c   | 12 +++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def
index 07946a85ecc..a5b6bb66a6c 100644
--- a/gcc/dbgcnt.def
+++ b/gcc/dbgcnt.def
@@ -171,6 +171,8 @@ DEBUG_COUNTER (if_after_reload)
 DEBUG_COUNTER (if_conversion)
 DEBUG_COUNTER (if_conversion_tree)
 DEBUG_COUNTER (ipa_cp_bits)
+DEBUG_COUNTER (ipa_cp_values)
+DEBUG_COUNTER (ipa_cp_vr)
 DEBUG_COUNTER (ipa_mod_ref)
 DEBUG_COUNTER (ipa_sra_params)
 DEBUG_COUNTER (ipa_sra_retvalues)
diff --git a/gcc/ipa-cp.c b/gcc/ipa-cp.c
index f981366a345..9895548fc35 100644
--- a/gcc/ipa-cp.c
+++ b/gcc/ipa-cp.c
@@ -5462,6 +5462,9 @@ decide_about_value (struct cgraph_node *node, int index, 
HOST_WIDE_INT offset,
                                            &caller_count))
     return false;
 
+  if (!dbg_cnt (ipa_cp_values))
+    return false;
+
   if (dump_file && (dump_flags & TDF_DETAILS))
     {
       fprintf (dump_file, " - considering value ");
@@ -5577,6 +5580,12 @@ decide_whether_version_node (struct cgraph_node *node)
 
   if (info->do_clone_for_all_contexts)
     {
+      if (!dbg_cnt (ipa_cp_values))
+       {
+         info->do_clone_for_all_contexts = false;
+         return ret;
+       }
+
       struct cgraph_node *clone;
       vec<cgraph_edge *> callers = node->collect_callers ();
 
@@ -5864,7 +5873,8 @@ ipcp_store_vr_results (void)
          ipa_vr vr;
 
          if (!plats->m_value_range.bottom_p ()
-             && !plats->m_value_range.top_p ())
+             && !plats->m_value_range.top_p ()
+             && dbg_cnt (ipa_cp_vr))
            {
              vr.known = true;
              vr.type = plats->m_value_range.m_vr.kind ();
-- 
2.28.0