[PATCH 5/5] Add opt-problem.cc

[David Malcolm <dmalcolm at redhat dot com>]

gcc/ChangeLog:
	* Makefile.in (OBJS): Add opt-problem.o.
	* opt-problem.cc: New file.
---
 gcc/Makefile.in    |  1 +
 gcc/opt-problem.cc | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 gcc/opt-problem.cc

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index c5c3d3c..fb262da 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1425,6 +1425,7 @@ OBJS = \
 	omp-grid.o \
 	omp-low.o \
 	omp-simd-clone.o \
+	opt-problem.o \
 	optabs.o \
 	optabs-libfuncs.o \
 	optabs-query.o \
diff --git a/gcc/opt-problem.cc b/gcc/opt-problem.cc
new file mode 100644
index 0000000..f518b16
--- /dev/null
+++ b/gcc/opt-problem.cc
@@ -0,0 +1,96 @@
+/* Rich information on why an optimization wasn't possible.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   Contributed by David Malcolm <dmalcolm@redhat.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "backend.h"
+#include "diagnostic.h"
+#include "tree.h"
+#include "gimple.h"
+#include "pretty-print.h"
+#include "gimple-pretty-print.h"
+#include "opt-problem.h"
+
+/* Emit a remark about an optimization.  */
+
+bool
+opt_report::remark (dump_location_t loc, const char *gmsgid, ...)
+{
+  if (!flag_remarks)
+    return false;
+
+  va_list ap;
+  va_start (ap, gmsgid);
+  bool ret = emit_diagnostic_valist (DK_REMARK, loc.get_location_t (), -1,
+				     gmsgid, &ap);
+  va_end (ap);
+
+  // FIXME: how should this interact with optinfo? (we don't want a duplicate remark)
+  return ret;
+}
+
+/* Emit a note about an optimization.  */
+
+bool
+opt_report::note (dump_location_t loc, const char *gmsgid, ...)
+{
+  va_list ap;
+  va_start (ap, gmsgid);
+  bool ret = emit_diagnostic_valist (DK_NOTE, loc.get_location_t (), -1,
+				     gmsgid, &ap);
+  va_end (ap);
+
+  // FIXME: how should this interact with optinfo? (we don't want a duplicate note)
+  return ret;
+}
+
+opt_problem *opt_problem::s_the_problem;
+
+// FIXME: some refactoring is needed, based on exactly where remarks land,
+// and how this interacts with the optinfo stuff.  For now, this decl:
+
+extern void
+print_impl_location (pretty_printer *pp, const dump_impl_location_t &impl_loc);
+
+/* Emit a diagnostic note describing why an optimization wasn't possible.  */
+
+void
+opt_problem::report_reason (opt_report &report)
+{
+  bool show_color = pp_show_color (global_dc->printer);
+
+  pretty_printer pp;
+  pp_show_color (&pp) = pp_show_color (global_dc->printer);
+  pp_string (&pp, m_text);
+  if (m_stmt)
+    {
+      pp_string (&pp, ": ");
+      pp_begin_quote (&pp, show_color);
+      pp_gimple_stmt_1 (&pp, m_stmt, 0, TDF_SLIM);
+      pp_end_quote (&pp, show_color);
+    }
+
+  print_impl_location (&pp, m_location.get_impl_location ());
+
+  const char *msg = pp_formatted_text (&pp);
+
+  report.note (m_location, "%s", msg);
+}
-- 
1.8.5.3