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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_amd64_specific_sse2.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_amd64_specific_sse2.erl')
| -rw-r--r-- | lib/hipe/regalloc/hipe_amd64_specific_sse2.erl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/hipe/regalloc/hipe_amd64_specific_sse2.erl b/lib/hipe/regalloc/hipe_amd64_specific_sse2.erl index 341233e851..8914e7cac3 100644 --- a/lib/hipe/regalloc/hipe_amd64_specific_sse2.erl +++ b/lib/hipe/regalloc/hipe_amd64_specific_sse2.erl @@ -60,6 +60,9 @@ update_bb/4, subst_temps/3]). +%% callbacks for hipe_bb_weights +-export([branch_preds/2]). + %%---------------------------------------------------------------------------- -include("../flow/cfg.hrl"). @@ -156,6 +159,9 @@ 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). + %% AMD64 stuff def_use(Instruction, _) -> |