Go patch committed: Use the type context to determine type of a complex constant

[Ian Lance Taylor]

This patch by Chris Manghane fixes the Go frontend to use the type
context to determine the type of a complex constant.  This fixes
https://golang.org/issue/11572 .  Bootstrapped and ran Go testsuite on
x86_64-unknown-linux-gnu.  Committed to mainline.

Ian

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE     (revision 226543)
+++ gcc/go/gofrontend/MERGE     (working copy)
@@ -1,4 +1,4 @@
-bdd98c601f2c8dbd0bf821548ba09c038f7645c4
+df080adb06f0e423820f3f6b9604b0c1093ff20a
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/expressions.cc
===================================================================
--- gcc/go/gofrontend/expressions.cc    (revision 226510)
+++ gcc/go/gofrontend/expressions.cc    (working copy)
@@ -2396,7 +2396,7 @@ class Complex_expression : public Expres
 
   void
   do_dump_expression(Ast_dump_context*) const;
-  
+
  private:
   // The complex value.
   mpc_t val_;
@@ -2423,8 +2423,7 @@ Complex_expression::do_determine_type(co
 {
   if (this->type_ != NULL && !this->type_->is_abstract())
     ;
-  else if (context->type != NULL
-          && context->type->complex_type() != NULL)
+  else if (context->type != NULL && context->type->is_numeric_type())
     this->type_ = context->type;
   else if (!context->may_be_abstract)
     this->type_ = Type::lookup_complex_type("complex128");