IA MCU psABI support: changes to libraries

[gcc.git] / gcc / predict.def

diff --git a/gcc/predict.def b/gcc/predict.def
index 62ae9d9f8d3dee4dc1ae14d442f9baaf1059327e..a355ed34774acc7f6fed2b65e577ec8cdd9f31a5 100644 (file)
--- a/gcc/predict.def
+++ b/gcc/predict.def
@@ -1,5 +1,5 @@
 /* Definitions for the branch prediction routines in the GNU compiler.
-   Copyright (C) 2001, 2003, 2004, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2001-2015 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -32,7 +32,7 @@ along with GCC; see the file COPYING3.  If not see
    HITRATE is the probability that edge predicted by predictor as taken
    will be really taken (so it should be always above
    REG_BR_PROB_BASE / 2).  */
-   
+
 
 /* A value used as final outcome of all heuristics.  */
 DEF_PREDICTOR (PRED_COMBINED, "combined", PROB_ALWAYS, 0)
@@ -57,7 +57,15 @@ DEF_PREDICTOR (PRED_UNCONDITIONAL, "unconditional jump", PROB_ALWAYS,
 DEF_PREDICTOR (PRED_LOOP_ITERATIONS, "loop iterations", PROB_ALWAYS,
               PRED_FLAG_FIRST_MATCH)
 
-/* Hints dropped by user via __builtin_expect feature.  */
+/* 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).
+   Refer to param.def for details.  */
 DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY,
               PRED_FLAG_FIRST_MATCH)
 
@@ -69,11 +77,11 @@ DEF_PREDICTOR (PRED_LOOP_ITERATIONS_GUESSED, "guessed loop iterations",
 DEF_PREDICTOR (PRED_CONTINUE, "continue", HITRATE (50), 0)
 
 /* Branch to basic block containing call marked by noreturn attribute.  */
-DEF_PREDICTOR (PRED_NORETURN, "noreturn call", HITRATE (99),
+DEF_PREDICTOR (PRED_NORETURN, "noreturn call", PROB_VERY_LIKELY,
               PRED_FLAG_FIRST_MATCH)
 
 /* Branch to basic block containing call marked by cold function attribute.  */
-DEF_PREDICTOR (PRED_COLD_FUNCTION, "cold function call", HITRATE (99),
+DEF_PREDICTOR (PRED_COLD_FUNCTION, "cold function call", PROB_VERY_LIKELY,
               PRED_FLAG_FIRST_MATCH)
 
 /* Loopback edge is taken.  */
@@ -114,5 +122,57 @@ DEF_PREDICTOR (PRED_NEGATIVE_RETURN, "negative return", HITRATE (96), 0)
 /* Branch ending with return; is probably not taken */
 DEF_PREDICTOR (PRED_NULL_RETURN, "null return", HITRATE (90), 0)
 
-/* Branches to a mudflap bounds check are extremely unlikely.  */
-DEF_PREDICTOR (PRED_MUDFLAP, "mudflap check", PROB_VERY_LIKELY, 0)
+/* Branches to compare induction variable to a loop bound is
+   extremely likely.  */
+DEF_PREDICTOR (PRED_LOOP_IV_COMPARE_GUESS, "guess loop iv compare",
+              PROB_VERY_LIKELY, 0)
+
+/* Use number of loop iterations determined by # of iterations analysis
+   to set probability of branches that compares IV to loop bound variable.  */
+DEF_PREDICTOR (PRED_LOOP_IV_COMPARE, "loop iv compare", PROB_VERY_LIKELY,
+              PRED_FLAG_FIRST_MATCH)
+
+/* Branches to hot labels are likely.  */
+DEF_PREDICTOR (PRED_HOT_LABEL, "hot label", HITRATE (85), 0)
+
+/* 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)