[PATCH 06/16] gcc: driver: add timevars for as, collect2, ld

[David Malcolm <dmalcolm@redhat.com>]

gcc/ChangeLog:
	* gcc.c (execute): Identify certain commands, and account their
	time to specific timevars.
	* gcc.h (driver::get_timer): New accessor.
	* timevar.def (TV_DRIVER_EXECUTE_AS): New.
	(TV_DRIVER_EXECUTE_COLLECT2): New.
	(TV_DRIVER_EXECUTE_LD): New.
	(TV_DRIVER_EXECUTE_OTHER): New.
---
 gcc/gcc.c       | 19 +++++++++++++++++++
 gcc/gcc.h       |  2 ++
 gcc/timevar.def |  4 ++++
 3 files changed, 25 insertions(+)

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 46e750d..93f41ec 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -2845,6 +2845,25 @@ execute (void)
     if (strcmp (arg, "|") == 0)
       n_commands++;
 
+  /* If we're timing things, and we have a single command in the
+     pipeline, bill the time to that command.  Given that we
+     need a timevar for each one, we only split out a few important
+     commands. */
+  timevar_id_t tv_id;
+  tv_id = TV_DRIVER_EXECUTE_OTHER;
+  gcc_assert (g_driver);
+  timer *driver_timer = g_driver->get_timer ();
+  if (driver_timer && n_commands == 1)
+    {
+      if (0 == strcmp (argbuf[0], "as"))
+	tv_id = TV_DRIVER_EXECUTE_AS;
+      else if (0 == strcmp (argbuf[0], "collect2"))
+	tv_id = TV_DRIVER_EXECUTE_COLLECT2;
+      else if (0 == strcmp (argbuf[0], "ld"))
+	tv_id = TV_DRIVER_EXECUTE_LD;
+    }
+  auto_timevar tv (driver_timer, tv_id);
+
   /* Get storage for each command.  */
   commands = (struct command *) alloca (n_commands * sizeof (struct command));
 
diff --git a/gcc/gcc.h b/gcc/gcc.h
index cfff8ef..15bc11d 100644
--- a/gcc/gcc.h
+++ b/gcc/gcc.h
@@ -37,6 +37,8 @@ class driver
   int main (int argc, char **argv);
   void finalize ();
 
+  timer *get_timer () const { return m_timer; }
+
  private:
   void set_progname (const char *argv0) const;
   void expand_at_files (int *argc, char ***argv) const;
diff --git a/gcc/timevar.def b/gcc/timevar.def
index d04a729..ce9236d 100644
--- a/gcc/timevar.def
+++ b/gcc/timevar.def
@@ -291,6 +291,10 @@ DEFTIMEVAR (TV_ASSEMBLE	     , "assemble JIT code")
 DEFTIMEVAR (TV_DRIVER_SETUP          , "driver: setup")
 DEFTIMEVAR (TV_DRIVER_SPEC	     , "driver: do spec on infiles")
 DEFTIMEVAR (TV_DRIVER_LINK	     , "driver: run linker")
+DEFTIMEVAR (TV_DRIVER_EXECUTE_AS     , "driver: executing \"as\"")
+DEFTIMEVAR (TV_DRIVER_EXECUTE_COLLECT2, "driver: executing \"collect2\"")
+DEFTIMEVAR (TV_DRIVER_EXECUTE_LD     , "driver: executing \"ld\"")
+DEFTIMEVAR (TV_DRIVER_EXECUTE_OTHER  , "driver: executing subprocess")
 DEFTIMEVAR (TV_LINK		     , "link JIT code")
 DEFTIMEVAR (TV_LOAD		     , "load JIT result")
 DEFTIMEVAR (TV_JIT_ACQUIRING_MUTEX   , "acquiring JIT mutex")
-- 
1.8.5.3