[PATCH 01/02] PR jit/64166: Add methods to gcc::dump_manager needed by JIT testing

[David Malcolm <dmalcolm at redhat dot com>]

This is the non-JIT part of the patch for PR jit/64166.

Provide a way for the JIT to lookup a dump_file_info * by switch name,
and to get from there to the filename.

OK for trunk?

gcc/ChangeLog:
	PR jit/64166
	* dumpfile.c (gcc::dump_manager::get_dump_file_info_by_switch):
	New function.
	(gcc::dump_manager::get_dump_file_name): Split out bulk of
	implementation into a new overloaded variant taking a
	dump_file_info *.
	* dumpfile.h (gcc::dump_manager::get_dump_file_info_by_switch):
	New function.
	(gcc::dump_manager::get_dump_file_name): New overloaded variant of
	this function, taking a dump_file_info *.
---
 gcc/dumpfile.c | 35 ++++++++++++++++++++++++++++++++++-
 gcc/dumpfile.h |  6 ++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/gcc/dumpfile.c b/gcc/dumpfile.c
index c2cd89b..eb178fe 100644
--- a/gcc/dumpfile.c
+++ b/gcc/dumpfile.c
@@ -217,21 +217,54 @@ get_dump_file_info (int phase) const
     return m_extra_dump_files + (phase - TDI_end);
 }
 
+/* Locate the dump_file_info with swtch equal to SWTCH,
+   or return NULL if no such dump_file_info exists.  */
+
+struct dump_file_info *
+gcc::dump_manager::
+get_dump_file_info_by_switch (const char *swtch) const
+{
+  for (unsigned i = 0; i < m_extra_dump_files_in_use; i++)
+    if (0 == strcmp (m_extra_dump_files[i].swtch, swtch))
+      return &m_extra_dump_files[i];
+
+  /* Not found.  */
+  return NULL;
+}
+
 
 /* Return the name of the dump file for the given phase.
+   The caller is responsible for calling free on the returned
+   buffer.
    If the dump is not enabled, returns NULL.  */
 
 char *
 gcc::dump_manager::
 get_dump_file_name (int phase) const
 {
-  char dump_id[10];
   struct dump_file_info *dfi;
 
   if (phase == TDI_none)
     return NULL;
 
   dfi = get_dump_file_info (phase);
+
+  return get_dump_file_name (dfi);
+}
+
+/* Return the name of the dump file for the given dump_file_info.
+   The caller is responsible for calling free on the returned
+   buffer.
+   If the dump is not enabled, returns NULL.  */
+
+char *
+gcc::dump_manager::
+get_dump_file_name (struct dump_file_info *dfi) const
+{
+  char dump_id[10];
+
+  gcc_assert (dfi);
+
   if (dfi->pstate == 0)
     return NULL;
 
diff --git a/gcc/dumpfile.h b/gcc/dumpfile.h
index d650174..93aea67 100644
--- a/gcc/dumpfile.h
+++ b/gcc/dumpfile.h
@@ -182,11 +182,17 @@ public:
   struct dump_file_info *
   get_dump_file_info (int phase) const;
 
+  struct dump_file_info *
+  get_dump_file_info_by_switch (const char *swtch) const;
+
   /* Return the name of the dump file for the given phase.
      If the dump is not enabled, returns NULL.  */
   char *
   get_dump_file_name (int phase) const;
 
+  char *
+  get_dump_file_name (struct dump_file_info *dfi) const;
+
   int
   dump_switch_p (const char *arg);
 
-- 
1.8.5.3