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| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-06-18 15:35:47 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-06-18 15:35:47 +0000 |
| commit | f6664feec514b2e3b3f36fb59c9b1b14dc5a52fc (patch) | |
| tree | 0803743d2349ea46ce205c05df7cae76a3374b1f /gcc/unroll.c | |
| parent | 55af5e57a6fa3e4016d3723e03c3a1926ea9e9ee (diff) | |
| download | gcc-f6664feec514b2e3b3f36fb59c9b1b14dc5a52fc.tar.gz | |
* unroll.c: Include predict.h.
(unroll_loop): Drop prediction notes on preconditioning.
* predict.def (PRED_LOOP_PRECONDITIONG, PRED_LOOP_CONDITION):
New; add comments on the others.
* Makefile.in: (unroll.o): Add dependancy on predict.h.
* loop.c (strength_reduce): Fix branch prediction.
* stmt.c (emit_case_nodes): Optimize test whether index is in given
interval.
* predict.c (estimate_probability): Do not bail out early
when note is present.
(combine_predictions_for_insn): Fix note removal code.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@43441 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 94c58cd925c..9a09f5d3d3e 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -167,6 +167,7 @@ enum unroll_types #include "toplev.h" #include "hard-reg-set.h" #include "basic-block.h" +#include "predict.h" /* This controls which loops are unrolled, and by how much we unroll them. */ @@ -962,6 +963,7 @@ unroll_loop (loop, insn_count, strength_reduce_p) emit_cmp_and_jump_insns (initial_value, final_value, neg_inc ? LE : GE, NULL_RTX, mode, 0, 0, labels[1]); + predict_insn_def (get_last_insn (), PRED_LOOP_CONDITION, NOT_TAKEN); JUMP_LABEL (get_last_insn ()) = labels[1]; LABEL_NUSES (labels[1])++; } @@ -1007,6 +1009,8 @@ unroll_loop (loop, insn_count, strength_reduce_p) labels[i]); JUMP_LABEL (get_last_insn ()) = labels[i]; LABEL_NUSES (labels[i])++; + predict_insn (get_last_insn (), PRED_LOOP_PRECONDITIONING, + REG_BR_PROB_BASE / (unroll_number - i)); } /* If the increment is greater than one, then we need another branch, |