/* Definitions for the branch prediction routines in the GNU compiler.
- Copyright (C) 2001-2014 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 Free Software Foundation, Inc.
This file is part of GCC.
DEF_PREDICTOR (PRED_LOOP_ITERATIONS, "loop iterations", PROB_ALWAYS,
PRED_FLAG_FIRST_MATCH)
+/* Assume that any given atomic operation has low contention,
+ and thus the compare-and-swap operation succeeds. */
+DEF_PREDICTOR (PRED_COMPARE_AND_SWAP, "compare and swap", PROB_VERY_LIKELY,
+ PRED_FLAG_FIRST_MATCH)
+
/* Hints dropped by user via __builtin_expect feature. Note: the
probability of PROB_VERY_LIKELY is now overwritten by param
builtin_expect_probability with a default value of HITRATE(90).
/* Branches to cold labels are extremely unlikely. */
DEF_PREDICTOR (PRED_COLD_LABEL, "cold label", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
+
+
+/* The following predictors are used in Fortran. */
+
+/* Branch leading to an integer overflow are extremely unlikely. */
+DEF_PREDICTOR (PRED_FORTRAN_OVERFLOW, "overflow", PROB_ALWAYS,
+ PRED_FLAG_FIRST_MATCH)
+
+/* Branch leading to a failure status are unlikely. This can occur for out
+ of memory or when trying to allocate an already allocated allocated or
+ deallocating an already deallocated allocatable. This predictor only
+ occurs when the user explicitly asked for a return status. By default,
+ the code aborts, which is handled via PRED_NORETURN. */
+DEF_PREDICTOR (PRED_FORTRAN_FAIL_ALLOC, "fail alloc", PROB_VERY_LIKELY, 0)
+
+/* Branch leading to an I/O failure status are unlikely. This predictor is
+ used for I/O failures such as for invalid unit numbers. This predictor
+ only occurs when the user explicitly asked for a return status. By default,
+ the code aborts, which is handled via PRED_NORETURN. */
+DEF_PREDICTOR (PRED_FORTRAN_FAIL_IO, "fail alloc", HITRATE(85), 0)
+
+/* Branch leading to a run-time warning message which is printed only once
+ are unlikely. The print-warning branch itself can be likely or unlikely. */
+DEF_PREDICTOR (PRED_FORTRAN_WARN_ONCE, "warn once", HITRATE (75), 0)
+
+/* Branch belonging to a zero-sized array. */
+DEF_PREDICTOR (PRED_FORTRAN_SIZE_ZERO, "zero-sized array", HITRATE(70), 0)
+
+/* Branch belonging to an invalid bound index, in a context where it is
+ standard conform and well defined but rather pointless and, hence, rather
+ unlikely to occur. */
+DEF_PREDICTOR (PRED_FORTRAN_INVALID_BOUND, "zero-sized array", HITRATE(90), 0)
+
+/* Branch belonging to the handling of absent optional arguments. This
+ predictor is used when an optional dummy argument, associated with an
+ absent argument, is passed on as actual argument to another procedure,
+ which in turn has an optional argument. */
+DEF_PREDICTOR (PRED_FORTRAN_ABSENT_DUMMY, "absent dummy", HITRATE(60), 0)