diff options
Diffstat (limited to 'lib/hipe/ppc/hipe_ppc_cfg.erl')
| -rw-r--r-- | lib/hipe/ppc/hipe_ppc_cfg.erl | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/lib/hipe/ppc/hipe_ppc_cfg.erl b/lib/hipe/ppc/hipe_ppc_cfg.erl index f17c0ac503..d44d38f38d 100644 --- a/lib/hipe/ppc/hipe_ppc_cfg.erl +++ b/lib/hipe/ppc/hipe_ppc_cfg.erl @@ -21,8 +21,8 @@ bb/2, bb_add/3]). -export([postorder/1]). -export([linearise/1, params/1, reverse_postorder/1]). --export([arity/1]). -%%%-export([redirect_jmp/3, arity/1]). +-export([redirect_jmp/3, arity/1]). +-export([branch_preds/1]). %%% these tell cfg.inc what to define (ugly as hell) -define(BREADTH_ORDER,true). @@ -75,11 +75,30 @@ branch_successors(Branch) -> #pseudo_tailcall{} -> [] end. +branch_preds(Branch) -> + case Branch of + #bctr{labels=Labels} -> + Prob = 1.0/length(Labels), + [{L, Prob} || L <- Labels]; + #pseudo_bc{true_label=TrueLab,false_label=FalseLab,pred=Pred} -> + [{FalseLab, 1.0-Pred}, {TrueLab, Pred}]; + #pseudo_call{contlab=ContLab, sdesc=#ppc_sdesc{exnlab=[]}} -> + %% A function can still cause an exception, even if we won't catch it + [{ContLab, 1.0-hipe_bb_weights:call_exn_pred()}]; + #pseudo_call{contlab=ContLab, sdesc=#ppc_sdesc{exnlab=ExnLab}} -> + CallExnPred = hipe_bb_weights:call_exn_pred(), + [{ContLab, 1.0-CallExnPred}, {ExnLab, CallExnPred}]; + _ -> + case branch_successors(Branch) of + [] -> []; + [Single] -> [{Single, 1.0}] + end + end. + -ifdef(REMOVE_TRIVIAL_BBS_NEEDED). fails_to(_Instr) -> []. -endif. --ifdef(notdef). redirect_jmp(I, Old, New) -> case I of #b_label{label=Label} -> @@ -93,10 +112,16 @@ redirect_jmp(I, Old, New) -> if Old =:= FalseLab -> I1#pseudo_bc{false_label=New}; true -> I1 end; - %% handle pseudo_call too? - _ -> I + #pseudo_call{sdesc=SDesc0, contlab=ContLab0} -> + SDesc = case SDesc0 of + #ppc_sdesc{exnlab=Old} -> SDesc0#ppc_sdesc{exnlab=New}; + #ppc_sdesc{exnlab=_} -> SDesc0 + end, + ContLab = if Old =:= ContLab0 -> New; + true -> ContLab0 + end, + I#pseudo_call{sdesc=SDesc, contlab=ContLab} end. --endif. mk_goto(Label) -> hipe_ppc:mk_b_label(Label). |