Delete compiler/MachDeps.h

This was accidentally added back in
28334b47 after it is was no longer
needed by the compiler proper in
20956e57.

compiler/MachDeps.h

-/* -----------------------------------------------------------------------------
- *
- * (c) The University of Glasgow 2002
- *
- * Definitions that characterise machine specific properties of basic
- * types (C & Haskell) of a target platform.
- *
- * NB: Keep in sync with HsFFI.h and StgTypes.h.
- * NB: THIS FILE IS INCLUDED IN HASKELL SOURCE!
- *
- * To understand the structure of the RTS headers, see the wiki:
- *   https://gitlab.haskell.org/ghc/ghc/wikis/commentary/source-tree/includes
- *
- * ---------------------------------------------------------------------------*/
-
-#pragma once
-
-/* Don't allow stage1 (cross-)compiler embed assumptions about target
- * platform. When ghc-stage1 is being built by ghc-stage0 is should not
- * refer to target defines. A few past examples:
- *  - https://gitlab.haskell.org/ghc/ghc/issues/13491
- *  - https://phabricator.haskell.org/D3122
- *  - https://phabricator.haskell.org/D3405
- *
- * In those cases code change assumed target defines like SIZEOF_HSINT
- * are applied to host platform, not target platform.
- *
- * So what should be used instead in GHC_STAGE=1?
- *
- * To get host's equivalent of SIZEOF_HSINT you can use Bits instances:
- *    Data.Bits.finiteBitSize (0 :: Int)
- *
- * To get target's values it is preferred to use runtime target
- * configuration from 'targetPlatform :: DynFlags -> Platform'
- * record.
- *
- * Hence we hide these macros from GHC_STAGE=1
- */
-
-/* Sizes of C types come from here... */
-#include "ghcautoconf.h"
-
-/* Sizes of Haskell types follow.  These sizes correspond to:
- *   - the number of bytes in the primitive type (eg. Int#)
- *   - the number of bytes in the external representation (eg. HsInt)
- *   - the scale offset used by writeFooOffAddr#
- *
- * In the heap, the type may take up more space: eg. SIZEOF_INT8 == 1,
- * but it takes up SIZEOF_HSWORD (4 or 8) bytes in the heap.
- */
-
-#define SIZEOF_HSCHAR           SIZEOF_WORD32
-#define ALIGNMENT_HSCHAR        ALIGNMENT_WORD32
-
-#define SIZEOF_HSINT            SIZEOF_VOID_P
-#define ALIGNMENT_HSINT         ALIGNMENT_VOID_P
-
-#define SIZEOF_HSWORD           SIZEOF_VOID_P
-#define ALIGNMENT_HSWORD        ALIGNMENT_VOID_P
-
-#define SIZEOF_HSDOUBLE         SIZEOF_DOUBLE
-#define ALIGNMENT_HSDOUBLE      ALIGNMENT_DOUBLE
-
-#define SIZEOF_HSFLOAT          SIZEOF_FLOAT
-#define ALIGNMENT_HSFLOAT       ALIGNMENT_FLOAT
-
-#define SIZEOF_HSPTR            SIZEOF_VOID_P
-#define ALIGNMENT_HSPTR         ALIGNMENT_VOID_P
-
-#define SIZEOF_HSFUNPTR         SIZEOF_VOID_P
-#define ALIGNMENT_HSFUNPTR      ALIGNMENT_VOID_P
-
-#define SIZEOF_HSSTABLEPTR      SIZEOF_VOID_P
-#define ALIGNMENT_HSSTABLEPTR   ALIGNMENT_VOID_P
-
-#define SIZEOF_INT8             SIZEOF_INT8_T
-#define ALIGNMENT_INT8          ALIGNMENT_INT8_T
-
-#define SIZEOF_WORD8            SIZEOF_UINT8_T
-#define ALIGNMENT_WORD8         ALIGNMENT_UINT8_T
-
-#define SIZEOF_INT16            SIZEOF_INT16_T
-#define ALIGNMENT_INT16         ALIGNMENT_INT16_T
-
-#define SIZEOF_WORD16           SIZEOF_UINT16_T
-#define ALIGNMENT_WORD16        ALIGNMENT_UINT16_T
-
-#define SIZEOF_INT32            SIZEOF_INT32_T
-#define ALIGNMENT_INT32         ALIGNMENT_INT32_T
-
-#define SIZEOF_WORD32           SIZEOF_UINT32_T
-#define ALIGNMENT_WORD32        ALIGNMENT_UINT32_T
-
-#define SIZEOF_INT64            SIZEOF_INT64_T
-#define ALIGNMENT_INT64         ALIGNMENT_INT64_T
-
-#define SIZEOF_WORD64           SIZEOF_UINT64_T
-#define ALIGNMENT_WORD64        ALIGNMENT_UINT64_T
-
-#if !defined(WORD_SIZE_IN_BITS)
-#if SIZEOF_HSWORD == 4
-#define WORD_SIZE_IN_BITS       32
-#define WORD_SIZE_IN_BITS_FLOAT 32.0
-#else
-#define WORD_SIZE_IN_BITS       64
-#define WORD_SIZE_IN_BITS_FLOAT 64.0
-#endif
-#endif
-
-#if !defined(TAG_BITS)
-#if SIZEOF_HSWORD == 4
-#define TAG_BITS                2
-#else
-#define TAG_BITS                3
-#endif
-#endif
-
-#define TAG_MASK ((1 << TAG_BITS) - 1)
-