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| author | Magnus Lång <[email protected]> | 2016-09-24 09:37:46 +0200 |
|---|---|---|
| committer | Magnus Lång <[email protected]> | 2017-03-16 20:49:42 +0100 |
| commit | cc115ebc67a465233c7740efb42e0bc9584ad352 (patch) | |
| tree | 766d1f10b40e4a4c145bad262d2bbd372eb3f636 /lib/hipe/regalloc/hipe_x86_specific.erl | |
| parent | e99f1d41bc8a7e035e35fd5aef6f3ea023d7f12e (diff) | |
| download | otp-cc115ebc67a465233c7740efb42e0bc9584ad352.tar.gz otp-cc115ebc67a465233c7740efb42e0bc9584ad352.tar.bz2 otp-cc115ebc67a465233c7740efb42e0bc9584ad352.zip | |
hipe: Add branch prediction accessor ra callbacks
Adds a new register allocator callback
Target:branch_preds(Instr, Context) which, for a control flow
instruction Instr, returns a list of tuples {Target, Probability} for
each label name Target that Instr may branch to. Probability is a float
between 0.0 and 1.0 and corresponds to the predicted probability that
control flow branches to the corresponding target. The probabilities may
sum to at most 1.0 (rounding errors aside). Note that a sum less than
1.0 is valid.
Diffstat (limited to 'lib/hipe/regalloc/hipe_x86_specific.erl')
| -rw-r--r-- | lib/hipe/regalloc/hipe_x86_specific.erl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/hipe/regalloc/hipe_x86_specific.erl b/lib/hipe/regalloc/hipe_x86_specific.erl index 0d9d7b751e..f21384d377 100644 --- a/lib/hipe/regalloc/hipe_x86_specific.erl +++ b/lib/hipe/regalloc/hipe_x86_specific.erl @@ -73,6 +73,9 @@ update_bb/4, subst_temps/3]). +%% callbacks for hipe_bb_weights +-export([branch_preds/2]). + check_and_rewrite(CFG, Coloring, _) -> ?HIPE_X86_RA_POSTCONDITIONS:check_and_rewrite(CFG, Coloring, 'normal'). @@ -160,6 +163,9 @@ bb(CFG,L,_) -> update_bb(CFG,L,BB,_) -> hipe_x86_cfg:bb_add(CFG,L,BB). +branch_preds(Instr,_) -> + hipe_x86_cfg:branch_preds(Instr). + %% X86 stuff def_use(Instruction,_) -> |