re PR go/61316 (gccgo: spurious "incompatible types in assignment" error [GoSmith])

	PR go/61316
compiler: Don't lower multi-valued arguments into temporaries.

From-SVN: r218606

1 files changed, 14 insertions, 1 deletions

diff --git a/gcc/go/gofrontend/expressions.h b/gcc/go/gofrontend/expressions.h
index d96df28..398709e 100644
--- a/gcc/go/gofrontend/expressions.h
+++ b/gcc/go/gofrontend/expressions.h
@@ -1632,7 +1632,7 @@ class Call_expression : public Expression
       fn_(fn), args_(args), type_(NULL), results_(NULL), call_(NULL),
       call_temp_(NULL), expected_result_count_(0), is_varargs_(is_varargs),
       varargs_are_lowered_(false), types_are_determined_(false),
-      is_deferred_(false), issued_error_(false)
+      is_deferred_(false), issued_error_(false), is_multi_value_arg_(false)
   { }
 
   // The function to call.
@@ -1703,6 +1703,17 @@ class Call_expression : public Expression
   bool
   issue_error();
 
+  // Whether this call returns multiple results that are used as an
+  // multi-valued argument.
+  bool
+  is_multi_value_arg() const
+  { return this->is_multi_value_arg_; }
+
+  // Note this call is used as a multi-valued argument.
+  void
+  set_is_multi_value_arg()
+  { this->is_multi_value_arg_ = true; }
+
  protected:
   int
   do_traverse(Traverse*);
@@ -1806,6 +1817,8 @@ class Call_expression : public Expression
   // results and uses.  This is to avoid producing multiple errors
   // when there are multiple Call_result_expressions.
   bool issued_error_;
+  // True if this call is used as an argument that returns multiple results.
+  bool is_multi_value_arg_;
 };
 
 // An expression which represents a pointer to a function.