re PR sanitizer/80110 (error: statement marked for throw, but doesn’t w/ -fsanitize=thread)

	PR sanitizer/80110
	* tsan.c: Include tree-eh.h.
	(instrument_builtin_call): Call maybe_clean_eh_stmt or
	maybe_clean_or_replace_eh_stmt where needed.
	(instrument_memory_accesses): Add cfg_changed argument.
	Call gimple_purge_dead_eh_edges on each block and set *cfg_changed
	if it returned true.
	(tsan_pass): Adjust caller.  Return TODO_cleanup_cfg if cfg_changed.

	* g++.dg/tsan/pr80110.C: New test.

From-SVN: r246399

gcc/ChangeLog

 2017-03-22  Jakub Jelinek  <jakub@redhat.com>
 
+	PR sanitizer/80110
+	* tsan.c: Include tree-eh.h.
+	(instrument_builtin_call): Call maybe_clean_eh_stmt or
+	maybe_clean_or_replace_eh_stmt where needed.
+	(instrument_memory_accesses): Add cfg_changed argument.
+	Call gimple_purge_dead_eh_edges on each block and set *cfg_changed
+	if it returned true.
+	(tsan_pass): Adjust caller.  Return TODO_cleanup_cfg if cfg_changed.
+
 	PR rtl-optimization/63191
 	* config/i386/i386.c (ix86_delegitimize_address): Turn into small
 	wrapper function, moved the whole old content into ...

gcc/testsuite/ChangeLog

+2017-03-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/80110
+	* g++.dg/tsan/pr80110.C: New test.
+
 2017-03-22  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/80142

gcc/testsuite/g++.dg/tsan/pr80110.C

+// PR sanitizer/80110
+// { dg-do compile }
+// { dg-options "-fnon-call-exceptions -fsanitize=thread" }
+
+struct A
+{
+  int b ();
+  void c () { static int d = b (); }
+};
+
+void
+foo ()
+{
+  A e;
+  e.c ();
+}

gcc/tsan.c

@@ -38,6 +38,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-iterator.h"
 #include "tree-ssa-propagate.h"
 #include "tree-ssa-loop-ivopts.h"
+#include "tree-eh.h"
 #include "tsan.h"
 #include "asan.h"
 #include "builtins.h"
@@ -504,6 +505,7 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 	      return;
 	    gimple_call_set_fndecl (stmt, decl);
 	    update_stmt (stmt);
+	    maybe_clean_eh_stmt (stmt);
 	    if (tsan_atomic_table[i].action == fetch_op)
 	      {
 		args[1] = gimple_call_arg (stmt, 1);
@@ -524,6 +526,7 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 				       ? MEMMODEL_SEQ_CST
 				       : MEMMODEL_ACQUIRE);
 	    update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
+	    maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 	    stmt = gsi_stmt (*gsi);
 	    if (tsan_atomic_table[i].action == fetch_op_seq_cst)
 	      {
@@ -572,6 +575,7 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 	      return;
 	    update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
 				args[4], args[5]);
+	    maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 	    return;
 	  case bool_cas:
 	  case val_cas:
@@ -599,6 +603,7 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 					       MEMMODEL_SEQ_CST),
 				build_int_cst (NULL_TREE,
 					       MEMMODEL_SEQ_CST));
+	    maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 	    if (tsan_atomic_table[i].action == val_cas && lhs)
 	      {
 		tree cond;
@@ -623,6 +628,7 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 				build_int_cst (t, 0),
 				build_int_cst (NULL_TREE,
 					       MEMMODEL_RELEASE));
+	    maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 	    return;
 	  case bool_clear:
 	  case bool_test_and_set:
@@ -651,11 +657,13 @@ instrument_builtin_call (gimple_stmt_iterator *gsi)
 	      {
 		update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
 				    build_int_cst (t, 0), last_arg);
+		maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 		return;
 	      }
 	    t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
 	    update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
 				t, last_arg);
+	    maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
 	    stmt = gsi_stmt (*gsi);
 	    lhs = gimple_call_lhs (stmt);
 	    if (lhs == NULL_TREE)
@@ -766,7 +774,7 @@ instrument_func_exit (void)
    Return true if func entry/exit should be instrumented.  */
 
 static bool
-instrument_memory_accesses (void)
+instrument_memory_accesses (bool *cfg_changed)
 {
   basic_block bb;
   gimple_stmt_iterator gsi;
@@ -775,20 +783,24 @@ instrument_memory_accesses (void)
   auto_vec<gimple *> tsan_func_exits;
 
   FOR_EACH_BB_FN (bb, cfun)
-    for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-      {
-	gimple *stmt = gsi_stmt (gsi);
-	if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
-	  {
-	    if (fentry_exit_instrument)
-	      replace_func_exit (stmt);
-	    else
-	      tsan_func_exits.safe_push (stmt);
-	    func_exit_seen = true;
-	  }
-	else
-	  fentry_exit_instrument |= instrument_gimple (&gsi);
-      }
+    {
+      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+	{
+	  gimple *stmt = gsi_stmt (gsi);
+	  if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
+	    {
+	      if (fentry_exit_instrument)
+		replace_func_exit (stmt);
+	      else
+		tsan_func_exits.safe_push (stmt);
+	      func_exit_seen = true;
+	    }
+	  else
+	    fentry_exit_instrument |= instrument_gimple (&gsi);
+	}
+      if (gimple_purge_dead_eh_edges (bb))
+	*cfg_changed = true;
+    }
   unsigned int i;
   gimple *stmt;
   FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
@@ -835,9 +847,10 @@ static unsigned
 tsan_pass (void)
 {
   initialize_sanitizer_builtins ();
-  if (instrument_memory_accesses ())
+  bool cfg_changed = false;
+  if (instrument_memory_accesses (&cfg_changed))
     instrument_func_entry ();
-  return 0;
+  return cfg_changed ? TODO_cleanup_cfg : 0;
 }
 
 /* Inserts __tsan_init () into the list of CTORs.  */