Function entry/exit profiling instrumentation:

* expr.h (profile_function_entry_libfunc, profile_function_exit_libfunc):
Declare new variables.
* optabs.c: Define them here.
(init_optabs): Initialize them.
* tree.h (struct tree_decl): New flag no_instrument_function_entry_exit.
(DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT): New accessor macro.
* c-decl.c (duplicate_decls): Merge it.
* c-common.c (enum attrs): New value A_NO_INSTRUMENT_FUNCTION.
(init_attributes): Use it for "no_instrument_function".
(decl_attributes): Handle it, for functions that have not yet been compiled.
Set decl flag.
* flags.h (flag_instrument_function_entry_exit): Declare new variable.
* toplev.c (flag_instrument_function_entry_exit): Define it here.
(f_options): New option "instrument-functions".
* function.h (struct function): New field instrument_entry_exit.
* function.c (current_function_instrument_entry_exit): New variable.
(push_function_context_to, pop_function_context_from): Save and restore.
(expand_function_start): Set current_ variable, maybe emit return label and
entry profile call.
(expand_function_end): Maybe emit exit profile call.
Testsuite:
* gcc.c-torture/special/eeprof-1.c: New test, for -finstrument-functions.
* gcc.c-torture/special/special.exp: Run it.

From-SVN: r21495

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index a53a036..9e43741 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -532,6 +532,10 @@ extern rtx chkr_set_right_libfunc;
 extern rtx chkr_copy_bitmap_libfunc;
 extern rtx chkr_check_exec_libfunc;
 extern rtx chkr_check_str_libfunc;
+
+/* For instrument-functions.  */
+extern rtx profile_function_entry_libfunc;
+extern rtx profile_function_exit_libfunc;
 
 typedef rtx (*rtxfun) PROTO ((rtx));