Add Int8# and Word8#

This is the first step of implementing:
https://github.com/ghc-proposals/ghc-proposals/pull/74

The main highlights/changes:

    primops.txt.pp gets two new sections for two new primitive types for
    signed and unsigned 8-bit integers (Int8# and Word8 respectively) along
    with basic arithmetic and comparison operations. PrimRep/RuntimeRep get
    two new constructors for them. All of the primops translate into the
    existing MachOPs.

    For CmmCalls the codegen will now zero-extend the values at call
    site (so that they can be moved to the right register) and then truncate
    them back their original width.

    x86 native codegen needed some updates, since it wasn't able to deal
    with the new widths, but all the changes are quite localized. LLVM
    backend seems to just work.

This is the second attempt at merging this, after the first attempt in
D4475 had to be backed out due to regressions on i386.

Bumps binary submodule.

Signed-off-by: Michal Terepeta <michal.terepeta@gmail.com>

Test Plan: ./validate (on both x86-{32,64})

Reviewers: bgamari, hvr, goldfire, simonmar

Subscribers: rwbarton, carter

Differential Revision: https://phabricator.haskell.org/D5258

1 files changed, 23 insertions, 3 deletions

diff --git a/compiler/prelude/TysPrim.hs b/compiler/prelude/TysPrim.hs
index 339913b683..7d04788d51 100644
--- a/compiler/prelude/TysPrim.hs
+++ b/compiler/prelude/TysPrim.hs
@@ -66,6 +66,9 @@ module TysPrim(
         weakPrimTyCon,                  mkWeakPrimTy,
         threadIdPrimTyCon,              threadIdPrimTy,
 
+        int8PrimTyCon,          int8PrimTy,
+        word8PrimTyCon,         word8PrimTy,
+
         int32PrimTyCon,         int32PrimTy,
         word32PrimTyCon,        word32PrimTy,
 
@@ -87,8 +90,9 @@ import GhcPrelude
 import {-# SOURCE #-} TysWiredIn
   ( runtimeRepTy, unboxedTupleKind, liftedTypeKind
   , vecRepDataConTyCon, tupleRepDataConTyCon
-  , liftedRepDataConTy, unliftedRepDataConTy, intRepDataConTy
-  , wordRepDataConTy, int64RepDataConTy, word64RepDataConTy, addrRepDataConTy
+  , liftedRepDataConTy, unliftedRepDataConTy, intRepDataConTy, int8RepDataConTy
+  , wordRepDataConTy, int64RepDataConTy, word8RepDataConTy, word64RepDataConTy
+  , addrRepDataConTy
   , floatRepDataConTy, doubleRepDataConTy
   , vec2DataConTy, vec4DataConTy, vec8DataConTy, vec16DataConTy, vec32DataConTy
   , vec64DataConTy
@@ -145,6 +149,7 @@ exposedPrimTyCons
     , doublePrimTyCon
     , floatPrimTyCon
     , intPrimTyCon
+    , int8PrimTyCon
     , int32PrimTyCon
     , int64PrimTyCon
     , bcoPrimTyCon
@@ -165,6 +170,7 @@ exposedPrimTyCons
     , proxyPrimTyCon
     , threadIdPrimTyCon
     , wordPrimTyCon
+    , word8PrimTyCon
     , word32PrimTyCon
     , word64PrimTyCon
 
@@ -188,12 +194,14 @@ mkBuiltInPrimTc fs unique tycon
                   BuiltInSyntax
 
 
-charPrimTyConName, intPrimTyConName, int32PrimTyConName, int64PrimTyConName, wordPrimTyConName, word32PrimTyConName, word64PrimTyConName, addrPrimTyConName, floatPrimTyConName, doublePrimTyConName, statePrimTyConName, proxyPrimTyConName, realWorldTyConName, arrayPrimTyConName, arrayArrayPrimTyConName, smallArrayPrimTyConName, byteArrayPrimTyConName, mutableArrayPrimTyConName, mutableByteArrayPrimTyConName, mutableArrayArrayPrimTyConName, smallMutableArrayPrimTyConName, mutVarPrimTyConName, mVarPrimTyConName, tVarPrimTyConName, stablePtrPrimTyConName, stableNamePrimTyConName, compactPrimTyConName, bcoPrimTyConName, weakPrimTyConName, threadIdPrimTyConName, eqPrimTyConName, eqReprPrimTyConName, eqPhantPrimTyConName, voidPrimTyConName :: Name
+charPrimTyConName, intPrimTyConName, int8PrimTyConName, int32PrimTyConName, int64PrimTyConName, wordPrimTyConName, word32PrimTyConName, word8PrimTyConName, word64PrimTyConName, addrPrimTyConName, floatPrimTyConName, doublePrimTyConName, statePrimTyConName, proxyPrimTyConName, realWorldTyConName, arrayPrimTyConName, arrayArrayPrimTyConName, smallArrayPrimTyConName, byteArrayPrimTyConName, mutableArrayPrimTyConName, mutableByteArrayPrimTyConName, mutableArrayArrayPrimTyConName, smallMutableArrayPrimTyConName, mutVarPrimTyConName, mVarPrimTyConName, tVarPrimTyConName, stablePtrPrimTyConName, stableNamePrimTyConName, compactPrimTyConName, bcoPrimTyConName, weakPrimTyConName, threadIdPrimTyConName, eqPrimTyConName, eqReprPrimTyConName, eqPhantPrimTyConName, voidPrimTyConName :: Name
 charPrimTyConName             = mkPrimTc (fsLit "Char#") charPrimTyConKey charPrimTyCon
 intPrimTyConName              = mkPrimTc (fsLit "Int#") intPrimTyConKey  intPrimTyCon
+int8PrimTyConName             = mkPrimTc (fsLit "Int8#") int8PrimTyConKey int8PrimTyCon
 int32PrimTyConName            = mkPrimTc (fsLit "Int32#") int32PrimTyConKey int32PrimTyCon
 int64PrimTyConName            = mkPrimTc (fsLit "Int64#") int64PrimTyConKey int64PrimTyCon
 wordPrimTyConName             = mkPrimTc (fsLit "Word#") wordPrimTyConKey wordPrimTyCon
+word8PrimTyConName            = mkPrimTc (fsLit "Word8#") word8PrimTyConKey word8PrimTyCon
 word32PrimTyConName           = mkPrimTc (fsLit "Word32#") word32PrimTyConKey word32PrimTyCon
 word64PrimTyConName           = mkPrimTc (fsLit "Word64#") word64PrimTyConKey word64PrimTyCon
 addrPrimTyConName             = mkPrimTc (fsLit "Addr#") addrPrimTyConKey addrPrimTyCon
@@ -513,8 +521,10 @@ primRepToRuntimeRep rep = case rep of
   LiftedRep     -> liftedRepDataConTy
   UnliftedRep   -> unliftedRepDataConTy
   IntRep        -> intRepDataConTy
+  Int8Rep       -> int8RepDataConTy
   WordRep       -> wordRepDataConTy
   Int64Rep      -> int64RepDataConTy
+  Word8Rep      -> word8RepDataConTy
   Word64Rep     -> word64RepDataConTy
   AddrRep       -> addrRepDataConTy
   FloatRep      -> floatRepDataConTy
@@ -556,6 +566,11 @@ intPrimTy       = mkTyConTy intPrimTyCon
 intPrimTyCon :: TyCon
 intPrimTyCon    = pcPrimTyCon0 intPrimTyConName IntRep
 
+int8PrimTy :: Type
+int8PrimTy     = mkTyConTy int8PrimTyCon
+int8PrimTyCon :: TyCon
+int8PrimTyCon  = pcPrimTyCon0 int8PrimTyConName Int8Rep
+
 int32PrimTy :: Type
 int32PrimTy     = mkTyConTy int32PrimTyCon
 int32PrimTyCon :: TyCon
@@ -571,6 +586,11 @@ wordPrimTy      = mkTyConTy wordPrimTyCon
 wordPrimTyCon :: TyCon
 wordPrimTyCon   = pcPrimTyCon0 wordPrimTyConName WordRep
 
+word8PrimTy :: Type
+word8PrimTy     = mkTyConTy word8PrimTyCon
+word8PrimTyCon :: TyCon
+word8PrimTyCon  = pcPrimTyCon0 word8PrimTyConName Word8Rep
+
 word32PrimTy :: Type
 word32PrimTy    = mkTyConTy word32PrimTyCon
 word32PrimTyCon :: TyCon