Fix calls.c for a _complex type (PR ipa/80104).

2017-03-28  Martin Liska  <mliska@suse.cz>

	PR ipa/80104
	* cgraphunit.c (cgraph_node::expand_thunk): Mark argument of a
	thunk call as DECL_GIMPLE_REG_P when vector or complex type.
2017-03-28  Martin Liska  <mliska@suse.cz>

	PR ipa/80104
	* gcc.dg/ipa/pr80104.c: New test.

From-SVN: r246525

gcc/ChangeLog

+2017-03-28  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/80104
+	* cgraphunit.c (cgraph_node::expand_thunk): Mark argument of a
+	thunk call as DECL_GIMPLE_REG_P when vector or complex type.
+
 2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>
 	    Thomas Petazzoni  <thomas.petazzoni@free-electrons.com>
 

gcc/cgraphunit.c

@@ -1806,6 +1806,10 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool force_gimple_thunk)
 	for (; i < nargs; i++, arg = DECL_CHAIN (arg))
 	  {
 	    tree tmp = arg;
+	    if (VECTOR_TYPE_P (TREE_TYPE (arg))
+		|| TREE_CODE (TREE_TYPE (arg)) == COMPLEX_TYPE)
+	      DECL_GIMPLE_REG_P (arg) = 1;
+
 	    if (!is_gimple_val (arg))
 	      {
 		tmp = create_tmp_reg (TYPE_MAIN_VARIANT

gcc/testsuite/ChangeLog

+2017-03-28  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/80104
+	* gcc.dg/ipa/pr80104.c: New test.
+
 2017-03-28  Marek Polacek  <polacek@redhat.com>
 
 	PR sanitizer/80067

gcc/testsuite/gcc.dg/ipa/pr80104.c

+/* PR ipa/80104 */
+/* { dg-do compile } */
+/* { dg-options "-fipa-icf" } */
+
+float
+a (_Complex float b)
+{
+  return *&b;
+}
+
+float
+c (_Complex float b)
+{
+  return (&b)[0];
+}