Always emit call to LIBCALL_BEGIN_CATCH at the start of the catch

Author: ibuclaw

gcc/d/ChangeLog

@@ -1,3 +1,8 @@
+2015-08-22  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* toir.cc(IRVisitor::visit(TryCatchStatement)): Always emit call to
+	LIBCALL_BEGIN_CATCH at the start of the catch.
+
 2015-08-20  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	* toir.cc(IRVisitor::visit): Set input location in all visitors that

gcc/d/toir.cc

@@ -785,13 +785,14 @@ class IRVisitor : public Visitor
 	    this->start_scope(level_catch);
 
 	    tree catchtype = build_ctype(vcatch->type);
+
+	    // Get D's internal exception Object, different from the generic
+	    // exception pointer returned from gcc runtime.
+	    tree ehptr = d_build_call_nary(builtin_decl_explicit(BUILT_IN_EH_POINTER),
+					   1, integer_zero_node);
+	    tree object = build_libcall(LIBCALL_BEGIN_CATCH, 1, &ehptr);
 	    if (vcatch->var)
 	      {
-		// Get D's internal exception Object, different
-		// from the generic exception pointer.
-		tree ehptr = d_build_call_nary(builtin_decl_explicit(BUILT_IN_EH_POINTER),
-					       1, integer_zero_node);
-		tree object = build_libcall(LIBCALL_BEGIN_CATCH, 1, &ehptr);
 		object = build1(NOP_EXPR, build_ctype(build_object_type()), object);
 		object = convert_expr(object, build_object_type(), vcatch->type);
 
@@ -801,6 +802,12 @@ class IRVisitor : public Visitor
 		build_local_var(vcatch->var);
 		add_stmt(init);
 	      }
+	    else
+	      {
+		// Still need to emit a call to __gdc_begin_catch() to remove
+		// the object from the uncaught exceptions list.
+		add_stmt(object);
+	      }
 
 	    if (vcatch->handler)
 	      vcatch->handler->accept(this);