X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fcmm%2FPprCmmZ.hs;fp=compiler%2Fcmm%2FPprCmmZ.hs;h=18302d89e2cd2b994fcad878ee9c369eef5c9d74;hb=b822c1e46cd64d1dba23fbab0f775b731bf0f12b;hp=e2fd960f0c9a258c353743cea1070a1e6103dd7c;hpb=d068f78b3ae99da8976e0836739cde6213c40041;p=ghc-hetmet.git diff --git a/compiler/cmm/PprCmmZ.hs b/compiler/cmm/PprCmmZ.hs index e2fd960..18302d8 100644 --- a/compiler/cmm/PprCmmZ.hs +++ b/compiler/cmm/PprCmmZ.hs @@ -8,25 +8,35 @@ where import Cmm import CmmExpr -import PprCmm() +import ForeignCall +import PprCmm import Outputable import qualified ZipCfgCmmRep as G import qualified ZipCfg as Z import CmmZipUtil +import Maybe import UniqSet import FastString ---------------------------------------------------------------- +-- | The purpose of this function is to print a Cmm zipper graph "as if it were" +-- a Cmm program. The objective is dodgy, so it's unsurprising parts of the +-- code are dodgy as well. + pprCmmGraphLikeCmm :: G.CmmGraph -> SDoc pprCmmGraphLikeCmm g = vcat (swallow blocks) where blocks = Z.postorder_dfs g swallow :: [G.CmmBlock] -> [SDoc] swallow [] = [] - swallow (Z.Block id t : rest) = tail id [] t rest - tail id prev' (Z.ZTail m t) rest = tail id (mid m : prev') t rest - tail id prev' (Z.ZLast Z.LastExit) rest = exit id prev' rest - tail id prev' (Z.ZLast (Z.LastOther l))rest = last id prev' l rest + swallow (Z.Block id t : rest) = tail id [] Nothing t rest + tail id prev' out (Z.ZTail (G.CopyOut conv args) t) rest = + if isJust out then panic "multiple CopyOut nodes in one basic block" + else + tail id (prev') (Just (conv, args)) t rest + tail id prev' out (Z.ZTail m t) rest = tail id (mid m : prev') out t rest + tail id prev' out (Z.ZLast Z.LastExit) rest = exit id prev' out rest + tail id prev' out (Z.ZLast (Z.LastOther l)) rest = last id prev' out l rest mid (G.CopyIn _ [] _) = text "// proc point (no parameters)" mid m@(G.CopyIn {}) = ppr m <+> text "(proc point)" mid m = ppr m @@ -34,59 +44,57 @@ pprCmmGraphLikeCmm g = vcat (swallow blocks) | id == Z.lg_entry g, entry_has_no_pred = vcat (text "" : reverse prev') | otherwise = hang (ppr id <> colon) 4 (vcat (reverse prev')) - last id prev' l n = + last id prev' out l n = let endblock stmt = block' id (stmt : prev') : swallow n in case l of G.LastBranch tgt [] -> case n of Z.Block id' t : bs | tgt == id', unique_pred id' - -> tail id prev' t bs -- optimize out redundant labels + -> tail id prev' out t bs -- optimize out redundant labels _ -> endblock (ppr $ CmmBranch tgt) - l@(G.LastBranch {}) -> endblock (ppr l) + l@(G.LastBranch {}) -> endblock $ with_out out l l@(G.LastCondBranch expr tid fid) -> let ft id = text "// fall through to " <> ppr id in case n of Z.Block id' t : bs - | id' == fid, False -> - tail id (ft fid : ppr (CmmCondBranch expr tid) : prev') t bs - | id' == tid, Just e' <- maybeInvertCmmExpr expr, False -> - tail id (ft tid : ppr (CmmCondBranch e' fid) : prev') t bs - _ -> endblock (ppr l) - l@(G.LastJump {}) -> endblock $ ppr l - l@(G.LastReturn {}) -> endblock $ ppr l - l@(G.LastSwitch {}) -> endblock $ ppr l - l@(G.LastCall _ _ Nothing) -> endblock $ ppr l - l@(G.LastCall tgt args (Just k)) + | id' == fid, isNothing out -> + tail id (ft fid : ppr (CmmCondBranch expr tid) : prev') Nothing t bs + | id' == tid, Just e' <- maybeInvertCmmExpr expr, isNothing out-> + tail id (ft tid : ppr (CmmCondBranch e' fid) : prev') Nothing t bs + _ -> endblock $ with_out out l + l@(G.LastJump {}) -> endblock $ with_out out l + l@(G.LastReturn {}) -> endblock $ with_out out l + l@(G.LastSwitch {}) -> endblock $ with_out out l + l@(G.LastCall _ Nothing) -> endblock $ with_out out l + l@(G.LastCall tgt (Just k)) | Z.Block id' (Z.ZTail (G.CopyIn _ ress srt) t) : bs <- n, + Just (conv, args) <- out, id' == k -> - let call = CmmCall tgt ress args (CmmSafe srt) CmmMayReturn + let call = CmmCall tgt' ress args (CmmSafe srt) CmmMayReturn + tgt' = CmmCallee tgt (cconv_of_conv conv) ppcall = ppr call <+> parens (text "ret to" <+> ppr k) in if unique_pred k then - tail id (ppcall : prev') t bs + tail id (ppcall : prev') Nothing t bs else endblock (ppcall) | Z.Block id' t : bs <- n, id' == k, unique_pred k, + Just (conv, args) <- out, Just (ress, srt) <- findCopyIn t -> - let call = CmmCall tgt ress args (CmmSafe srt) CmmMayReturn + let call = CmmCall tgt' ress args (CmmSafe srt) CmmMayReturn + tgt' = CmmCallee tgt (cconv_of_conv conv) delayed = ptext SLIT("// delayed CopyIn follows previous call") - in tail id (delayed : ppr call : prev') t bs - | otherwise -> endblock $ ppr l + in tail id (delayed : ppr call : prev') Nothing t bs + | otherwise -> endblock $ with_out out l findCopyIn (Z.ZTail (G.CopyIn _ ress srt) _) = Just (ress, srt) findCopyIn (Z.ZTail _ t) = findCopyIn t findCopyIn (Z.ZLast _) = Nothing - exit id prev' n = -- highly irregular (assertion violation?) + exit id prev' out n = -- highly irregular (assertion violation?) let endblock stmt = block' id (stmt : prev') : swallow n in - endblock (text "// ") -{- - case n of [] -> [text ""] - Z.Block id' t : bs -> - if unique_pred id' then - tail id (ptext SLIT("went thru exit") : prev') t bs - else - endblock (ppr $ CmmBranch id') --} + case out of Nothing -> endblock (text "// ") + Just (conv, args) -> endblock (ppr (G.CopyOut conv args) $$ + text "// ") preds = zipPreds g entry_has_no_pred = case Z.lookupBlockEnv preds (Z.lg_entry g) of Nothing -> True @@ -101,5 +109,21 @@ pprCmmGraphLikeCmm g = vcat (swallow blocks) else single in Z.fold_blocks add Z.emptyBlockSet g unique_pred id = Z.elemBlockSet id single_preds + cconv_of_conv (G.ConventionStandard conv _) = conv + cconv_of_conv (G.ConventionPrivate {}) = CmmCallConv -- XXX totally bogus - +with_out :: Maybe (G.Convention, CmmActuals) -> G.Last -> SDoc +with_out Nothing l = ptext SLIT("??no-arguments??") <+> ppr l +with_out (Just (conv, args)) l = last l + where last (G.LastCall e k) = + hcat [ptext SLIT("... = foreign "), + doubleQuotes(ppr conv), space, + ppr_target e, parens ( commafy $ map ppr args ), + ptext SLIT(" \"safe\""), + case k of Nothing -> ptext SLIT(" never returns") + Just _ -> empty, + semi ] + last l = ppr (G.CopyOut conv args) $$ ppr l + ppr_target (CmmLit lit) = pprLit lit + ppr_target fn' = parens (ppr fn') + commafy xs = hsep $ punctuate comma xs