diff options
| author | Jan Hubicka <jh@suse.cz> | 2008-08-30 16:19:01 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2008-08-30 14:19:01 +0000 |
| commit | 3a4fd356e0e9cda6a66a3a0af9ecb6600669265c (patch) | |
| tree | 4339e3edb706d886f8df2cbbc9a8fe530f969a60 /gcc/predict.c | |
| parent | b1bdaf4061096a0e4d4259acbf27cf97542ea9de (diff) | |
| download | gcc-3a4fd356e0e9cda6a66a3a0af9ecb6600669265c.zip gcc-3a4fd356e0e9cda6a66a3a0af9ecb6600669265c.tar.gz gcc-3a4fd356e0e9cda6a66a3a0af9ecb6600669265c.tar.bz2 | |
optabs.c (expand_abs_nojump): Update BRANCH_COST call.
* optabs.c (expand_abs_nojump): Update BRANCH_COST call.
* fold-cost.c (LOGICAL_OP_NON_SHORT_CIRCUIT, fold_truthop): Likewise.
* dojump.c (do_jump): Likewise.
* ifcvt.c (MAX_CONDITIONAL_EXECUTE): Likewise.
(note-if_info): Add BRANCH_COST.
(noce_try_store_flag_constants, noce_try_addcc, noce_try_store_flag_mask,
noce_try_cmove_arith, noce_try_cmove_arith, noce_try_cmove_arith,
noce_find_if_block, find_if_case_1, find_if_case_2): Use compuated
branch cost.
* expr.h (BRANCH_COST): Update default.
* predict.c (predictable_edge_p): New function.
* expmed.c (expand_smod_pow2, expand_sdiv_pow2, emit_store_flag):
Update BRANCH_COST call.
* basic-block.h (predictable_edge_p): Declare.
* config/alpha/alpha.h (BRANCH_COST): Update.
* config/frv/frv.h (BRANCH_COST): Update.
* config/s390/s390.h (BRANCH_COST): Update.
* config/spu/spu.h (BRANCH_COST): Update.
* config/sparc/sparc.h (BRANCH_COST): Update.
* config/m32r/m32r.h (BRANCH_COST): Update.
* config/i386/i386.h (BRANCH_COST): Update.
* config/i386/i386.c (ix86_expand_int_movcc): Update use of BRANCH_COST.
* config/sh/sh.h (BRANCH_COST): Update.
* config/pdp11/pdp11.h (BRANCH_COST): Update.
* config/avr/avr.h (BRANCH_COST): Update.
* config/crx/crx.h (BRANCH_COST): Update.
* config/xtensa/xtensa.h (BRANCH_COST): Update.
* config/stormy16/stormy16.h (BRANCH_COST): Update.
* config/m68hc11/m68hc11.h (BRANCH_COST): Update.
* config/iq2000/iq2000.h (BRANCH_COST): Update.
* config/ia64/ia64.h (BRANCH_COST): Update.
* config/rs6000/rs6000.h (BRANCH_COST): Update.
* config/arc/arc.h (BRANCH_COST): Update.
* config/score/score.h (BRANCH_COST): Update.
* config/arm/arm.h (BRANCH_COST): Update.
* config/pa/pa.h (BRANCH_COST): Update.
* config/mips/mips.h (BRANCH_COST): Update.
* config/vax/vax.h (BRANCH_COST): Update.
* config/h8300/h8300.h (BRANCH_COST): Update.
* params.def (PARAM_PREDICTABLE_BRANCH_OUTCOME): New.
* doc/invoke.texi (predictable-branch-cost-outcome): Document.
* doc/tm.texi (BRANCH_COST): Update.
From-SVN: r139804
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index d5de938..6ca1a0c 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -318,6 +318,23 @@ optimize_loop_nest_for_size_p (struct loop *loop) return !optimize_loop_nest_for_speed_p (loop); } +/* Return true when edge E is likely to be well predictable by branch + predictor. */ + +bool +predictable_edge_p (edge e) +{ + if (profile_status == PROFILE_ABSENT) + return false; + if ((e->probability + <= PARAM_VALUE (PARAM_PREDICTABLE_BRANCH_OUTCOME) * REG_BR_PROB_BASE / 100) + || (REG_BR_PROB_BASE - e->probability + <= PARAM_VALUE (PARAM_PREDICTABLE_BRANCH_OUTCOME) * REG_BR_PROB_BASE / 100)) + return true; + return false; +} + + /* Set RTL expansion for BB profile. */ void |