Remove gimple_call_types_likely_match_p (PR 70929)

2019-11-07  Martin Jambor  <mjambor@suse.cz>

	PR lto/70929
	* cif-code.def (MISMATCHED_ARGUMENTS): Removed.
	* cgraph.h (gimple_check_call_matching_types): Remove
	* cgraph.c (gimple_check_call_args): Likewise.
	(gimple_check_call_matching_types): Likewise.
	(symbol_table::create_edge): Do not call
	gimple_check_call_matching_types.
	(cgraph_edge::make_direct): Likewise.
	(cgraph_edge::redirect_call_stmt_to_callee): Likewise.
	* value-prof.h (check_ic_target): Remove.
	* value-prof.c (check_ic_target): Remove.
	(gimple_ic_transform): Do nat call check_ic_target.
	* auto-profile.c (function_instance::find_icall_target_map): Likewise.
	(afdo_indirect_call): Likewise.
	* ipa-prop.c (update_indirect_edges_after_inlining): Do not call
	gimple_check_call_matching_types.
	* ipa-inline.c (early_inliner): Likewise.

	testsuite/
	* g++.dg/lto/pr70929_[01].C: New test.
	* gcc.dg/winline-10.c: Adjust for the fact that inlining happens.

From-SVN: r277920

gcc/ChangeLog

@@ -1,3 +1,23 @@
+2019-11-07  Martin Jambor  <mjambor@suse.cz>
+
+	PR lto/70929
+	* cif-code.def (MISMATCHED_ARGUMENTS): Removed.
+	* cgraph.h (gimple_check_call_matching_types): Remove
+	* cgraph.c (gimple_check_call_args): Likewise.
+	(gimple_check_call_matching_types): Likewise.
+	(symbol_table::create_edge): Do not call
+	gimple_check_call_matching_types.
+	(cgraph_edge::make_direct): Likewise.
+	(cgraph_edge::redirect_call_stmt_to_callee): Likewise.
+	* value-prof.h (check_ic_target): Remove.
+	* value-prof.c (check_ic_target): Remove.
+	(gimple_ic_transform): Do nat call check_ic_target.
+	* auto-profile.c (function_instance::find_icall_target_map): Likewise.
+	(afdo_indirect_call): Likewise.
+	* ipa-prop.c (update_indirect_edges_after_inlining): Do not call
+	gimple_check_call_matching_types.
+	* ipa-inline.c (early_inliner): Likewise.
+
 2019-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/arm/arm.md (arm_<simd32_op>): New define_expand.

gcc/auto-profile.c

@@ -606,8 +606,6 @@ function_instance::find_icall_target_map (gcall *stmt,
           get_identifier (afdo_string_table->get_name (callee)));
       if (node == NULL)
         continue;
-      if (!check_ic_target (stmt, node))
-        continue;
       (*map)[callee] = iter->second->total_count ();
       ret += iter->second->total_count ();
     }
@@ -1034,7 +1032,7 @@ afdo_indirect_call (gimple_stmt_iterator *gsi, const icall_target_map &map,
       print_generic_expr (dump_file, direct_call->decl, TDF_SLIM);
     }
 
-  if (direct_call == NULL || !check_ic_target (stmt, direct_call))
+  if (direct_call == NULL)
     {
       if (dump_file)
         fprintf (dump_file, " not transforming\n");

gcc/cgraph.c

@@ -881,19 +881,8 @@ symbol_table::create_edge (cgraph_node *caller, cgraph_node *callee,
   edge->can_throw_external
     = call_stmt ? stmt_can_throw_external (DECL_STRUCT_FUNCTION (caller->decl),
 					   call_stmt) : false;
-  if (call_stmt
-      && callee && callee->decl
-      && !gimple_check_call_matching_types (call_stmt, callee->decl,
-					    false))
-    {
-      edge->inline_failed = CIF_MISMATCHED_ARGUMENTS;
-      edge->call_stmt_cannot_inline_p = true;
-    }
-  else
-    {
-      edge->inline_failed = CIF_FUNCTION_NOT_CONSIDERED;
-      edge->call_stmt_cannot_inline_p = false;
-    }
+  edge->inline_failed = CIF_FUNCTION_NOT_CONSIDERED;
+  edge->call_stmt_cannot_inline_p = false;
 
   if (opt_for_fn (edge->caller->decl, flag_devirtualize)
       && call_stmt && DECL_STRUCT_FUNCTION (caller->decl))
@@ -1255,13 +1244,6 @@ cgraph_edge::make_direct (cgraph_node *callee)
   /* Insert to callers list of the new callee.  */
   edge->set_callee (callee);
 
-  if (call_stmt
-      && !gimple_check_call_matching_types (call_stmt, callee->decl, false))
-    {
-      call_stmt_cannot_inline_p = true;
-      inline_failed = CIF_MISMATCHED_ARGUMENTS;
-    }
-
   /* We need to re-determine the inlining status of the edge.  */
   initialize_inline_failed (edge);
   return edge;
@@ -1290,28 +1272,9 @@ cgraph_edge::redirect_call_stmt_to_callee (void)
 	 substitution), forget about speculating.  */
       if (decl)
 	e = e->resolve_speculation (decl);
-      /* If types do not match, speculation was likely wrong. 
-         The direct edge was possibly redirected to the clone with a different
-	 signature.  We did not update the call statement yet, so compare it 
-	 with the reference that still points to the proper type.  */
-      else if (!gimple_check_call_matching_types (e->call_stmt,
-						  ref->referred->decl,
-						  true))
-	{
-	  if (dump_file)
-	    fprintf (dump_file, "Not expanding speculative call of %s -> %s\n"
-		     "Type mismatch.\n",
-		     e->caller->dump_name (),
-		     e->callee->dump_name ());
-	  e = e->resolve_speculation ();
-	  /* We are producing the final function body and will throw away the
-	     callgraph edges really soon.  Reset the counts/frequencies to
-	     keep verifier happy in the case of roundoff errors.  */
-	  e->count = gimple_bb (e->call_stmt)->count;
-	}
-      /* Expand speculation into GIMPLE code.  */
       else
 	{
+	  /* Expand speculation into GIMPLE code.  */
 	  if (dump_file)
 	    {
 	      fprintf (dump_file,
@@ -3638,102 +3601,6 @@ cgraph_node::get_fun () const
   return fun;
 }
 
-/* Verify if the type of the argument matches that of the function
-   declaration.  If we cannot verify this or there is a mismatch,
-   return false.  */
-
-static bool
-gimple_check_call_args (gimple *stmt, tree fndecl, bool args_count_match)
-{
-  tree parms, p;
-  unsigned int i, nargs;
-
-  /* Calls to internal functions always match their signature.  */
-  if (gimple_call_internal_p (stmt))
-    return true;
-
-  nargs = gimple_call_num_args (stmt);
-
-  /* Get argument types for verification.  */
-  if (fndecl)
-    parms = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
-  else
-    parms = TYPE_ARG_TYPES (gimple_call_fntype (stmt));
-
-  /* Verify if the type of the argument matches that of the function
-     declaration.  If we cannot verify this or there is a mismatch,
-     return false.  */
-  if (fndecl && DECL_ARGUMENTS (fndecl))
-    {
-      for (i = 0, p = DECL_ARGUMENTS (fndecl);
-	   i < nargs;
-	   i++, p = DECL_CHAIN (p))
-	{
-	  tree arg;
-	  /* We cannot distinguish a varargs function from the case
-	     of excess parameters, still deferring the inlining decision
-	     to the callee is possible.  */
-	  if (!p)
-	    break;
-	  arg = gimple_call_arg (stmt, i);
-	  if (p == error_mark_node
-	      || DECL_ARG_TYPE (p) == error_mark_node
-	      || arg == error_mark_node
-	      || (!types_compatible_p (DECL_ARG_TYPE (p), TREE_TYPE (arg))
-		  && !fold_convertible_p (DECL_ARG_TYPE (p), arg)))
-            return false;
-	}
-      if (args_count_match && p)
-	return false;
-    }
-  else if (parms)
-    {
-      for (i = 0, p = parms; i < nargs; i++, p = TREE_CHAIN (p))
-	{
-	  tree arg;
-	  /* If this is a varargs function defer inlining decision
-	     to callee.  */
-	  if (!p)
-	    break;
-	  arg = gimple_call_arg (stmt, i);
-	  if (TREE_VALUE (p) == error_mark_node
-	      || arg == error_mark_node
-	      || TREE_CODE (TREE_VALUE (p)) == VOID_TYPE
-	      || (!types_compatible_p (TREE_VALUE (p), TREE_TYPE (arg))
-		  && !fold_convertible_p (TREE_VALUE (p), arg)))
-            return false;
-	}
-    }
-  else
-    {
-      if (nargs != 0)
-        return false;
-    }
-  return true;
-}
-
-/* Verify if the type of the argument and lhs of CALL_STMT matches
-   that of the function declaration CALLEE. If ARGS_COUNT_MATCH is
-   true, the arg count needs to be the same.
-   If we cannot verify this or there is a mismatch, return false.  */
-
-bool
-gimple_check_call_matching_types (gimple *call_stmt, tree callee,
-				  bool args_count_match)
-{
-  tree lhs;
-
-  if ((DECL_RESULT (callee)
-       && !DECL_BY_REFERENCE (DECL_RESULT (callee))
-       && (lhs = gimple_call_lhs (call_stmt)) != NULL_TREE
-       && !useless_type_conversion_p (TREE_TYPE (DECL_RESULT (callee)),
-                                      TREE_TYPE (lhs))
-       && !fold_convertible_p (TREE_TYPE (DECL_RESULT (callee)), lhs))
-      || !gimple_check_call_args (call_stmt, callee, args_count_match))
-    return false;
-  return true;
-}
-
 /* Reset all state within cgraph.c so that we can rerun the compiler
    within the same process.  For use by toplev::finalize.  */
 

gcc/cgraph.h

@@ -2445,8 +2445,6 @@ bool cgraph_function_possibly_inlined_p (tree);
 const char* cgraph_inline_failed_string (cgraph_inline_failed_t);
 cgraph_inline_failed_type_t cgraph_inline_failed_type (cgraph_inline_failed_t);
 
-extern bool gimple_check_call_matching_types (gimple *, tree, bool);
-
 /* In cgraphunit.c  */
 void cgraphunit_c_finalize (void);
 

gcc/cif-code.def

@@ -95,10 +95,6 @@ DEFCIFCODE(NEVER_CALL, CIF_FINAL_NORMAL,
 DEFCIFCODE(NOT_DECLARED_INLINED, CIF_FINAL_NORMAL,
 	   N_("function not declared inline and code size would grow"))
 
-/* Caller and callee disagree on the arguments.  */
-DEFCIFCODE(MISMATCHED_ARGUMENTS, CIF_FINAL_ERROR,
-	   N_("mismatched arguments"))
-
 /* Caller and callee disagree on the arguments.  */
 DEFCIFCODE(LTO_MISMATCHED_DECLARATIONS, CIF_FINAL_ERROR,
 	   N_("mismatched declarations during linktime optimization"))

gcc/ipa-inline.c

@@ -2913,14 +2913,6 @@ early_inliner (function *fun)
 		= estimate_num_insns (edge->call_stmt, &eni_size_weights);
 	      es->call_stmt_time
 		= estimate_num_insns (edge->call_stmt, &eni_time_weights);
-
-	      if (edge->callee->decl
-		  && !gimple_check_call_matching_types (
-		      edge->call_stmt, edge->callee->decl, false))
-		{
- 		  edge->inline_failed = CIF_MISMATCHED_ARGUMENTS;
-		  edge->call_stmt_cannot_inline_p = true;
-		}
 	    }
 	  if (iterations < PARAM_VALUE (PARAM_EARLY_INLINER_MAX_ITERATIONS) - 1)
 	    ipa_update_overall_fn_summary (node);

gcc/ipa-prop.c

@@ -3492,11 +3492,6 @@ update_indirect_edges_after_inlining (struct cgraph_edge *cs,
       else if (new_direct_edge)
 	{
 	  new_direct_edge->indirect_inlining_edge = 1;
-	  if (new_direct_edge->call_stmt)
-	    new_direct_edge->call_stmt_cannot_inline_p
-	      = !gimple_check_call_matching_types (
-		  new_direct_edge->call_stmt,
-		  new_direct_edge->callee->decl, false);
 	  if (new_edges)
 	    {
 	      new_edges->safe_push (new_direct_edge);

gcc/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2019-11-07  Martin Jambor  <mjambor@suse.cz>
+
+	PR lto/70929
+	* g++.dg/lto/pr70929_[01].C: New test.
+	* gcc.dg/winline-10.c: Adjust for the fact that inlining happens.
+
 2019-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* gcc.target/arm/acle/simd32.c: Update test.

gcc/testsuite/g++.dg/lto/pr70929_0.C

@@ -0,0 +1,18 @@
+// { dg-lto-do run }
+// { dg-lto-options { "-O3 -flto" } }
+
+struct s
+{
+  int a;
+  s() {a=1;}
+  ~s() {}
+};
+int t(struct s s);
+int main()
+{
+  s s;
+  int v=t(s);
+  if (!__builtin_constant_p (v))
+    __builtin_abort ();
+  return 0;
+}

gcc/testsuite/g++.dg/lto/pr70929_1.C

@@ -0,0 +1,10 @@
+struct s
+{
+  int a;
+  s() {a=1;}
+  ~s() {}
+};
+int t(struct s s)
+{
+  return s.a;
+}

gcc/testsuite/gcc.dg/winline-10.c

@@ -1,9 +1,9 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -Winline" } */
+/* { dg-options "-O2 -Winline -fopt-info-optimized-inline=stderr" } */
 
 struct s { int a; };
 
-inline void f (x)	/* { dg-warning "inlining .* mismatched arg" } */
+inline void f (x)
      int x;
 {
   asm ("");
@@ -11,7 +11,7 @@ inline void f (x)	/* { dg-warning "inlining .* mismatched arg" } */
 
 void g (struct s x)
 {
-  f (x); 		/* { dg-message "called from here" } */
+  f (x); 		/* { dg-optimized "Inlining f.* into g" } */
 }
 
 void f (int x);		/* { dg-warning "follows non-prototype definition" } */

gcc/value-prof.c

@@ -1245,25 +1245,6 @@ find_func_by_profile_id (int profile_id)
     return NULL;
 }
 
-/* Perform sanity check on the indirect call target. Due to race conditions,
-   false function target may be attributed to an indirect call site. If the
-   call expression type mismatches with the target function's type, expand_call
-   may ICE. Here we only do very minimal sanity check just to make compiler happy.
-   Returns true if TARGET is considered ok for call CALL_STMT.  */
-
-bool
-check_ic_target (gcall *call_stmt, struct cgraph_node *target)
-{
-   if (gimple_check_call_matching_types (call_stmt, target->decl, true))
-     return true;
-
-   if (dump_enabled_p ())
-     dump_printf_loc (MSG_MISSED_OPTIMIZATION, call_stmt,
-                      "Skipping target %s with mismatching types for icall\n",
-                      target->name ());
-   return false;
-}
-
 /* Do transformation
 
   if (actual_callee_address == address_of_most_common_function/method)
@@ -1456,17 +1437,6 @@ gimple_ic_transform (gimple_stmt_iterator *gsi)
       return false;
     }
 
-  if (!check_ic_target (stmt, direct_call))
-    {
-      if (dump_enabled_p ())
-	dump_printf_loc (MSG_MISSED_OPTIMIZATION, stmt,
-			 "Indirect call -> direct call %T => %T "
-			 "transformation skipped because of type mismatch: %G",
-			 gimple_call_fn (stmt), direct_call->decl, stmt);
-      gimple_remove_histogram_value (cfun, stmt, histogram);
-      return false;
-    }
-
   if (dump_enabled_p ())
     {
       dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, stmt,