[PR 77333] Fixup fntypes of gimple calls of clones

2017-03-30  Martin Jambor  <mjambor@suse.cz>

	PR ipa/77333
	* cgraph.h (cgraph_build_function_type_skip_args): Declare.
	* cgraph.c (redirect_call_stmt_to_callee): Set gimple fntype so that
	it reflects the signature changes performed at the callee side.
	* cgraphclones.c (build_function_type_skip_args): Make public, renamed
	to cgraph_build_function_type_skip_args.
	(build_function_decl_skip_args): Adjust call to the above function.

testsuite/
	* g++.dg/ipa/pr77333.C: New test.

From-SVN: r246589

gcc/ChangeLog

+2017-03-30  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/77333
+	* cgraph.h (cgraph_build_function_type_skip_args): Declare.
+	* cgraph.c (redirect_call_stmt_to_callee): Set gimple fntype so that
+	it reflects the signature changes performed at the callee side.
+	* cgraphclones.c (build_function_type_skip_args): Make public, renamed
+	to cgraph_build_function_type_skip_args.
+	(build_function_decl_skip_args): Adjust call to the above function.
+
 2017-03-30  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/80206

gcc/cgraph.c

@@ -1424,8 +1424,23 @@ cgraph_edge::redirect_call_stmt_to_callee (void)
       if (skip_bounds)
 	new_stmt = chkp_copy_call_skip_bounds (new_stmt);
 
+      tree old_fntype = gimple_call_fntype (e->call_stmt);
       gimple_call_set_fndecl (new_stmt, e->callee->decl);
-      gimple_call_set_fntype (new_stmt, gimple_call_fntype (e->call_stmt));
+      cgraph_node *origin = e->callee;
+      while (origin->clone_of)
+	origin = origin->clone_of;
+
+      if ((origin->former_clone_of
+	   && old_fntype == TREE_TYPE (origin->former_clone_of))
+	  || old_fntype == TREE_TYPE (origin->decl))
+	gimple_call_set_fntype (new_stmt, TREE_TYPE (e->callee->decl));
+      else
+	{
+	  bitmap skip = e->callee->clone.combined_args_to_skip;
+	  tree t = cgraph_build_function_type_skip_args (old_fntype, skip,
+							 false);
+	  gimple_call_set_fntype (new_stmt, t);
+	}
 
       if (gimple_vdef (new_stmt)
 	  && TREE_CODE (gimple_vdef (new_stmt)) == SSA_NAME)

gcc/cgraph.h

@@ -2326,6 +2326,8 @@ void tree_function_versioning (tree, tree, vec<ipa_replace_map *, va_gc> *,
 void dump_callgraph_transformation (const cgraph_node *original,
 				    const cgraph_node *clone,
 				    const char *suffix);
+tree cgraph_build_function_type_skip_args (tree orig_type, bitmap args_to_skip,
+					   bool skip_return);
 
 /* In cgraphbuild.c  */
 int compute_call_stmt_bb_frequency (tree, basic_block bb);

gcc/cgraphclones.c

@@ -152,9 +152,9 @@ cgraph_edge::clone (cgraph_node *n, gcall *call_stmt, unsigned stmt_uid,
 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP and the
    return value if SKIP_RETURN is true.  */
 
-static tree
-build_function_type_skip_args (tree orig_type, bitmap args_to_skip,
-			       bool skip_return)
+tree
+cgraph_build_function_type_skip_args (tree orig_type, bitmap args_to_skip,
+				      bool skip_return)
 {
   tree new_type = NULL;
   tree args, new_args = NULL;
@@ -219,7 +219,8 @@ build_function_decl_skip_args (tree orig_decl, bitmap args_to_skip,
   if (prototype_p (new_type)
       || (skip_return && !VOID_TYPE_P (TREE_TYPE (new_type))))
     new_type
-      = build_function_type_skip_args (new_type, args_to_skip, skip_return);
+      = cgraph_build_function_type_skip_args (new_type, args_to_skip,
+					      skip_return);
   TREE_TYPE (new_decl) = new_type;
 
   /* For declarations setting DECL_VINDEX (i.e. methods)

gcc/testsuite/ChangeLog

+2017-03-30  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/77333
+	* g++.dg/ipa/pr77333.C: New test.
+
 2017-03-30  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/80206

gcc/testsuite/g++.dg/ipa/pr77333.C

+// { dg-do run }
+// { dg-options "-O2 -fno-ipa-sra" }
+
+volatile int global;
+int __attribute__((noinline, noclone))
+get_data (int i)
+{
+  global = i;
+  return i;
+}
+
+typedef int array[32];
+
+namespace {
+
+char buf[512];
+
+class A
+{
+public:
+  int field;
+  char *s;
+
+  A() : field(223344)
+  {
+    s = buf;
+  }
+
+  int __attribute__((noinline))
+  foo (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j,
+       int k, int l, int m, int n, int o, int p, int q, int r, int s, int t)
+  {
+    global = a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t;
+    return global;
+  }
+
+  int __attribute__((noinline))
+  bar()
+  {
+    int r = foo (get_data (1), get_data (1), get_data (1), get_data (1),
+		 get_data (1), get_data (1), get_data (1), get_data (1),
+		 get_data (1), get_data (1), get_data (1), get_data (1),
+		 get_data (1), get_data (1), get_data (1), get_data (1),
+		 get_data (1), get_data (1), get_data (1), get_data (1));
+
+    if (field != 223344)
+      __builtin_abort ();
+    return 0;
+  }
+};
+
+}
+
+int main (int argc, char **argv)
+{
+  A a;
+  int r = a.bar();
+  r = a.bar ();
+  if (a.field != 223344)
+      __builtin_abort ();
+  if (global != 20)
+    __builtin_abort ();
+
+  return r;
+}