[PATCH] IPA MOD REF: add debug counter.

["Martin Liška" <mliska@suse.cz>]

I'm going to install the following tested patch.

Thanks,
Martin

gcc/ChangeLog:

	* dbgcnt.def (DEBUG_COUNTER): Add ipa_mod_ref debug counter.
	* tree-ssa-alias.c (modref_may_conflict): Handle the counter.
---
  gcc/dbgcnt.def       | 1 +
  gcc/tree-ssa-alias.c | 4 ++++
  2 files changed, 5 insertions(+)

diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def
index cf8775b2b66..07946a85ecc 100644
--- a/gcc/dbgcnt.def
+++ b/gcc/dbgcnt.def
@@ -171,6 +171,7 @@ DEBUG_COUNTER (if_after_reload)
  DEBUG_COUNTER (if_conversion)
  DEBUG_COUNTER (if_conversion_tree)
  DEBUG_COUNTER (ipa_cp_bits)
+DEBUG_COUNTER (ipa_mod_ref)
  DEBUG_COUNTER (ipa_sra_params)
  DEBUG_COUNTER (ipa_sra_retvalues)
  DEBUG_COUNTER (ira_move)
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index 97dc4ac8814..d85f378a8ae 100644
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -42,6 +42,7 @@ along with GCC; see the file COPYING3.  If not see
  #include "ipa-modref.h"
  #include "attr-fnspec.h"
  #include "errors.h"
+#include "dbgcnt.h"
  
  /* Broad overview of how alias analysis on gimple works:
  
@@ -2470,6 +2471,9 @@ modref_may_conflict (const gimple *stmt,
    if (tt->every_base)
      return true;
  
+  if (!dbg_cnt (ipa_mod_ref))
+    return true;
+
    base_set = ao_ref_base_alias_set (ref);
  
    ref_set = ao_ref_alias_set (ref);
-- 
2.28.0