-----------------------------------------------------------------------------
{
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
module CmmParse ( parseCmmFile ) where
import CgMonad
'if' { L _ (CmmT_if) }
'jump' { L _ (CmmT_jump) }
'foreign' { L _ (CmmT_foreign) }
+ 'never' { L _ (CmmT_never) }
'prim' { L _ (CmmT_prim) }
'return' { L _ (CmmT_return) }
+ 'returns' { L _ (CmmT_returns) }
'import' { L _ (CmmT_import) }
'switch' { L _ (CmmT_switch) }
'case' { L _ (CmmT_case) }
cmmproc :: { ExtCode }
-- TODO: add real SRT/info tables to parsed Cmm
- : info maybe_formals maybe_frame maybe_gc_block '{' body '}'
- { do ((entry_ret_label, info, live, formals, frame, gc_block), stmts) <-
+ : info maybe_formals maybe_gc_block maybe_frame '{' body '}'
+ { do ((entry_ret_label, info, live, formals, gc_block, frame), stmts) <-
getCgStmtsEC' $ loopDecls $ do {
(entry_ret_label, info, live) <- $1;
formals <- sequence $2;
- frame <- $3;
- gc_block <- $4;
+ gc_block <- $3;
+ frame <- $4;
$6;
- return (entry_ret_label, info, live, formals, frame, gc_block) }
+ return (entry_ret_label, info, live, formals, gc_block, frame) }
blks <- code (cgStmtsToBlocks stmts)
code (emitInfoTableAndCode entry_ret_label (CmmInfo gc_block frame info) formals blks) }
formals <- sequence $2;
code (emitInfoTableAndCode entry_ret_label (CmmInfo Nothing Nothing info) formals []) }
- | NAME maybe_formals maybe_frame maybe_gc_block '{' body '}'
- { do ((formals, frame, gc_block), stmts) <-
+ | NAME maybe_formals maybe_gc_block maybe_frame '{' body '}'
+ { do ((formals, gc_block, frame), stmts) <-
getCgStmtsEC' $ loopDecls $ do {
formals <- sequence $2;
- frame <- $3;
- gc_block <- $4;
+ gc_block <- $3;
+ frame <- $4;
$6;
- return (formals, frame, gc_block) }
+ return (formals, gc_block, frame) }
blks <- code (cgStmtsToBlocks stmts)
code (emitProc (CmmInfo gc_block frame CmmNonInfoTable) (mkRtsCodeLabelFS $1) formals blks) }
[]) }
-- we leave most of the fields zero here. This is only used
-- to generate the BCO info table in the RTS at the moment.
+
+ -- A variant with a non-zero arity (needed to write Main_main in Cmm)
+ | 'INFO_TABLE_FUN' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ',' INT ',' INT ')'
+ -- ptrs, nptrs, closure type, description, type, fun type, arity
+ { do prof <- profilingInfo $11 $13
+ return (mkRtsEntryLabelFS $3,
+ CmmInfoTable prof (fromIntegral $9)
+ (FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT (fromIntegral $15) (fromIntegral $17)
+ (ArgSpec 0)
+ zeroCLit),
+ []) }
+ -- we leave most of the fields zero here. This is only used
+ -- to generate the BCO info table in the RTS at the moment.
| 'INFO_TABLE_CONSTR' '(' NAME ',' INT ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, tag, closure type, description, type
-- we tweak the syntax to avoid the conflict. The later
-- option is taken here because the other way would require
-- multiple levels of expanding and get unwieldy.
- | maybe_results 'foreign' STRING expr '(' hint_exprs0 ')' safety vols ';'
- {% foreignCall $3 $1 $4 $6 $9 $8 }
+ | maybe_results 'foreign' STRING expr '(' hint_exprs0 ')' safety vols opt_never_returns ';'
+ {% foreignCall $3 $1 $4 $6 $9 $8 $10 }
| maybe_results 'prim' '%' NAME '(' hint_exprs0 ')' safety vols ';'
{% primCall $1 $4 $6 $9 $8 }
-- stmt-level macros, stealing syntax from ordinary C-- function calls.
| 'if' bool_expr '{' body '}' else
{ ifThenElse $2 $4 $6 }
+opt_never_returns :: { CmmReturnInfo }
+ : { CmmMayReturn }
+ | 'never' 'returns' { CmmNeverReturns }
+
bool_expr :: { ExtFCode BoolExpr }
: bool_op { $1 }
| expr { do e <- $1; return (BoolTest e) }
-> [ExtFCode (CmmExpr,MachHint)]
-> Maybe [GlobalReg]
-> CmmSafety
+ -> CmmReturnInfo
-> P ExtCode
-foreignCall conv_string results_code expr_code args_code vols safety
+foreignCall conv_string results_code expr_code args_code vols safety ret
= do convention <- case conv_string of
"C" -> return CCallConv
+ "stdcall" -> return StdCallConv
"C--" -> return CmmCallConv
_ -> fail ("unknown calling convention: " ++ conv_string)
return $ do
--code (stmtC (CmmCall (CmmCallee expr convention) results args safety))
case convention of
-- Temporary hack so at least some functions are CmmSafe
- CmmCallConv -> code (stmtC (CmmCall (CmmCallee expr convention) results args safety))
+ CmmCallConv -> code (stmtC (CmmCall (CmmCallee expr convention) results args safety ret))
_ -> case safety of
CmmUnsafe ->
code (emitForeignCall' PlayRisky results
- (CmmCallee expr convention) args vols NoC_SRT)
+ (CmmCallee expr convention) args vols NoC_SRT ret)
CmmSafe srt ->
code (emitForeignCall' (PlaySafe unused) results
- (CmmCallee expr convention) args vols NoC_SRT) where
+ (CmmCallee expr convention) args vols NoC_SRT ret) where
unused = panic "not used by emitForeignCall'"
primCall
case safety of
CmmUnsafe ->
code (emitForeignCall' PlayRisky results
- (CmmPrim p) args vols NoC_SRT)
+ (CmmPrim p) args vols NoC_SRT CmmMayReturn)
CmmSafe srt ->
code (emitForeignCall' (PlaySafe unused) results
- (CmmPrim p) args vols NoC_SRT) where
+ (CmmPrim p) args vols NoC_SRT CmmMayReturn) where
unused = panic "not used by emitForeignCall'"
doStore :: MachRep -> ExtFCode CmmExpr -> ExtFCode CmmExpr -> ExtCode
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