re PR go/61204 (gccgo: ICE in in fold_convert_loc [GoSmith])

	PR go/61204
	* go-gcc.cc (Gcc_backend::temporary_variable): Don't initialize
	zero-sized variable.

From-SVN: r219316

gcc/go/ChangeLog

+2015-01-07  Chris Manghane  <cmang@google.com>
+
+	PR go/61204
+	* go-gcc.cc (Gcc_backend::temporary_variable): Don't initialize
+	zero-sized variable.
+
 2015-01-06  Chris Manghane  <cmang@google.com>
 
-	* go-gcc.cc (constructor_expression): Don't initialize zero-sized
-	fields, just evaluate the values for side effects.
+	* go-gcc.cc (Gcc_backend::constructor_expression): Don't
+	initialize zero-sized fields, just evaluate the values for side
+	effects.
 
 2015-01-05  Jakub Jelinek  <jakub@redhat.com>
 
@@ -11,8 +18,8 @@
 
 2014-12-19  Chris Manghane  <cmang@google.com>
 
-	* go-gcc.cc (array_constructor_expression): Don't construct arrays
-	of zero-sized values.
+	* go-gcc.cc (Gcc_backend::array_constructor_expression): Don't
+	construct arrays of zero-sized values.
 
 2014-10-29  Richard Sandiford  <richard.sandiford@arm.com>
 

gcc/go/go-gcc.cc

@@ -2536,7 +2536,7 @@ Gcc_backend::temporary_variable(Bfunction* function, Bblock* bblock,
       BIND_EXPR_VARS(bind_tree) = BLOCK_VARS(block_tree);
     }
 
-  if (init_tree != NULL_TREE)
+  if (this->type_size(btype) != 0 && init_tree != NULL_TREE)
     DECL_INITIAL(var) = fold_convert_loc(location.gcc_location(), type_tree,
                                          init_tree);
 
@@ -2546,6 +2546,13 @@ Gcc_backend::temporary_variable(Bfunction* function, Bblock* bblock,
   *pstatement = this->make_statement(build1_loc(location.gcc_location(),
                                                 DECL_EXPR,
 						void_type_node, var));
+
+  // Don't initialize VAR with BINIT, but still evaluate BINIT for
+  // its side effects.
+  if (this->type_size(btype) == 0 && init_tree != NULL_TREE)
+    *pstatement = this->compound_statement(this->expression_statement(binit),
+					   *pstatement);
+
   return new Bvariable(var);
 }