X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FDynFlags.hs;h=e5153ea33a9d54a27b9b1b0fc18d6c22edcae6c6;hb=ff91258cdc66148172e8533ebd115a836aa67b1b;hp=70229643366010f477654b08a77685293bbbdf5e;hpb=b3a0711bf88db2894261e3666b689b40371ddc48;p=ghc-hetmet.git

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index 7022964..e5153ea 100644
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -17,7 +17,7 @@ module DynFlags (
 	-- Dynamic flags
 	DynFlag(..),
 	DynFlags(..),
-	HscTarget(..), isObjectTarget,
+	HscTarget(..), isObjectTarget, defaultObjectTarget,
 	GhcMode(..), isOneShot,
 	GhcLink(..), isNoLink,
 	PackageFlag(..),
@@ -192,6 +192,7 @@ data DynFlag
    | Opt_CaseMerge
    | Opt_UnboxStrictFields
    | Opt_DictsCheap
+   | Opt_RewriteRules
 
    -- misc opts
    | Opt_Cpp
@@ -365,7 +366,11 @@ data PackageFlag
   | IgnorePackage  String
   deriving Eq
 
-defaultHscTarget
+defaultHscTarget = defaultObjectTarget
+
+-- | the 'HscTarget' value corresponding to the default way to create
+-- object files on the current platform.
+defaultObjectTarget
   | cGhcWithNativeCodeGen == "YES" 	=  HscAsm
   | otherwise				=  HscC
 
@@ -560,12 +565,16 @@ optLevelFlags :: [([Int], DynFlag)]
 optLevelFlags
   = [ ([0],	Opt_IgnoreInterfacePragmas)
     , ([0],     Opt_OmitInterfacePragmas)
+
     , ([1,2],	Opt_IgnoreAsserts)
+    , ([1,2],	Opt_RewriteRules)	-- Off for -O0; see Note [Scoping for Builtin rules]
+					-- 		in PrelRules
     , ([1,2],	Opt_DoEtaReduction)
     , ([1,2],	Opt_CaseMerge)
     , ([1,2],	Opt_Strictness)
     , ([1,2],	Opt_CSE)
     , ([1,2],	Opt_FullLaziness)
+
     , ([2],	Opt_LiberateCase)
     , ([2],	Opt_SpecConstr)
 
@@ -1067,7 +1076,8 @@ fFlags = [
   ( "asm-mangling",			Opt_DoAsmMangling ),
   ( "print-bind-result",		Opt_PrintBindResult ),
   ( "force-recomp",			Opt_ForceRecomp ),
-  ( "hpc-no-auto",			Opt_Hpc_No_Auto )
+  ( "hpc-no-auto",			Opt_Hpc_No_Auto ),
+  ( "rewrite-rules",			Opt_RewriteRules )
   ]