Remove some dead code

Not needed now that we don't support registerised via-C compilation.

diff --git a/compiler/cmm/PprC.hs b/compiler/cmm/PprC.hs
index 10f4e8b..aa7d914 100644 (file)
--- a/compiler/cmm/PprC.hs
+++ b/compiler/cmm/PprC.hs
@@ -64,10 +64,6 @@ import Data.Word
 import Data.Array.ST
 import Control.Monad.ST
 
-#if x86_64_TARGET_ARCH
-import StaticFlags     ( opt_Unregisterised )
-#endif
-
 #if defined(alpha_TARGET_ARCH) || defined(mips_TARGET_ARCH) || defined(mipsel_TARGET_ARCH) || defined(arm_TARGET_ARCH)
 #define BEWARE_LOAD_STORE_ALIGNMENT
 #endif
@@ -820,17 +816,6 @@ pprCall ppr_fn cconv results args _
 
   | otherwise
   =
-#if x86_64_TARGET_ARCH
-       -- HACK around gcc optimisations.
-       -- x86_64 needs a __DISCARD__() here, to create a barrier between
-       -- putting the arguments into temporaries and passing the arguments
-       -- to the callee, because the argument expressions may refer to
-       -- machine registers that are also used for passing arguments in the
-       -- C calling convention.
-    (if (not opt_Unregisterised) 
-       then ptext (sLit "__DISCARD__();") 
-       else empty) $$
-#endif
     ppr_assign results (ppr_fn <> parens (commafy (map pprArg args))) <> semi
   where 
      ppr_assign []           rhs = rhs