compiler: initial support for exporting function bodies

    
    Create a framework for putting function bodies in export data.  At
    present only empty functions will be put there, and they will be
    ignored on import.  Later patches will get this to the point of
    supporting inlining of (some) functions defined in other packages.
    
    Reviewed-on: https://go-review.googlesource.com/c/150061

From-SVN: r266490

1 files changed, 22 insertions, 0 deletions

diff --git a/gcc/go/gofrontend/statements.cc b/gcc/go/gofrontend/statements.cc
index c35002d..718139c 100644
--- a/gcc/go/gofrontend/statements.cc
+++ b/gcc/go/gofrontend/statements.cc
@@ -11,6 +11,7 @@
 #include "types.h"
 #include "expressions.h"
 #include "gogo.h"
+#include "export.h"
 #include "runtime.h"
 #include "backend.h"
 #include "statements.h"
@@ -1781,6 +1782,27 @@ Statement::make_statement(Expression* expr, bool is_ignored)
   return new Expression_statement(expr, is_ignored);
 }
 
+// Export data for a block.
+
+void
+Block_statement::do_export_statement(Export_function_body* efb)
+{
+  // We are already indented to the right position.
+  char buf[50];
+  snprintf(buf, sizeof buf, "{ //%d\n",
+	   Linemap::location_to_line(this->block_->start_location()));
+  efb->write_c_string(buf);
+
+  this->block_->export_block(efb);
+  // The indentation is correct for the statements in the block, so
+  // subtract one for the closing curly brace.
+  efb->decrement_indent();
+  efb->indent();
+  efb->write_c_string("}");
+  // Increment back to the value the caller thinks it has.
+  efb->increment_indent();
+}
+
 // Convert a block to the backend representation of a statement.
 
 Bstatement*