Merge #578

578: Remove unused code r=philberty a=philberty

Remove unused code

Co-authored-by: Philip Herron <philip.herron@embecosm.com>

1 files changed, 0 insertions, 195 deletions

diff --git a/gcc/rust/rust-backend.c b/gcc/rust/rust-backend.c
deleted file mode 100644
index 427fbe0..0000000
--- a/gcc/rust/rust-backend.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/* rust-backend.c -- Rust frontend interface to gcc backend.
-   Copyright (C) 2010-2020 Free Software Foundation, Inc.
-
-   This file is part of GCC.
-
-   GCC is free software; you can redistribute it and/or modify it under
-   the terms of the GNU General Public License as published by the Free
-   Software Foundation; either version 3, or (at your option) any later
-   version.
-
-   GCC is distributed in the hope that it will be useful, but WITHOUT ANY
-   WARRANTY; without even the implied warranty of MERCHANTABILITY or
-   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-   for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING3.  If not see
-   <http://www.gnu.org/licenses/>.  */
-
-#include "config.h"
-#include "system.h"
-#include "coretypes.h"
-#include "target.h"
-#include "tree.h"
-#include "memmodel.h"
-#include "tm_p.h"
-#include "diagnostic.h"
-#include "simple-object.h"
-#include "stor-layout.h"
-#include "intl.h"
-#include "output.h" /* for assemble_string */
-#include "common/common-target.h"
-//#include "rust-c.h" // import no longer exists, so hopefully not broken
-
-// satisfy intellisense
-#include "options.h"
-
-/* The segment name we pass to simple_object_start_read to find Rust
-   export data.  */
-
-#ifndef RUST_EXPORT_SEGMENT_NAME
-#define RUST_EXPORT_SEGMENT_NAME "__GNU_RUST"
-#endif
-
-/* The section name we use when reading and writing export data.  */
-
-#ifndef RUST_EXPORT_SECTION_NAME
-#define RUST_EXPORT_SECTION_NAME ".rust_export"
-#endif
-
-#ifndef TARGET_AIX
-#define TARGET_AIX 0
-#endif
-
-/* This file holds all the cases where the Rust frontend needs
-   information from gcc's backend.  */
-
-/* Return whether or not GCC has reported any errors.  */
-
-bool
-saw_errors (void)
-{
-  return errorcount != 0 || sorrycount != 0;
-}
-
-/* Return the alignment in bytes of a struct field of type T.  */
-
-unsigned int
-rust_field_alignment (tree t)
-{
-  unsigned int v;
-
-  v = TYPE_ALIGN (t);
-
-#ifdef BIGGEST_FIELD_ALIGNMENT
-  if (v > BIGGEST_FIELD_ALIGNMENT)
-    v = BIGGEST_FIELD_ALIGNMENT;
-#endif
-
-#ifdef ADJUST_FIELD_ALIGN
-  v = ADJUST_FIELD_ALIGN (NULL_TREE, t, v);
-#endif
-
-  return v / BITS_PER_UNIT;
-}
-
-/* This is called by the Rust frontend proper if the unsafe package was
-   imported.  When that happens we cannot do type-based alias
-   analysis.  */
-// TODO: this should be removed, as it only pertains to Go, not Rust
-void
-rust_imported_unsafe (void)
-{
-  flag_strict_aliasing = false;
-  TREE_OPTIMIZATION (optimization_default_node)->x_flag_strict_aliasing = false;
-
-  /* Let the backend know that the options have changed.  */
-  targetm.override_options_after_change ();
-}
-
-/* This is called by the Rust frontend proper to add data to the
-   section containing Rust export data.  */
-
-void
-rust_write_export_data (const char *bytes, unsigned int size)
-{
-  static section *sec;
-
-  if (sec == NULL)
-    {
-      gcc_assert (targetm_common.have_named_sections);
-      sec = get_section (RUST_EXPORT_SECTION_NAME,
-			 TARGET_AIX ? SECTION_EXCLUDE : SECTION_DEBUG, NULL);
-    }
-
-  switch_to_section (sec);
-  assemble_string (bytes, size);
-}
-
-/* The rust_read_export_data function is called by the Rust frontend
-   proper to read Rust export data from an object file.  FD is a file
-   descriptor open for reading.  OFFSET is the offset within the file
-   where the object file starts; this will be 0 except when reading an
-   archive.  On success this returns NULL and sets *PBUF to a buffer
-   allocated using malloc, of size *PLEN, holding the export data.  If
-   the data is not found, this returns NULL and sets *PBUF to NULL and
-   *PLEN to 0.  If some error occurs, this returns an error message
-   and sets *PERR to an errno value or 0 if there is no relevant
-   errno.  */
-
-const char *
-rust_read_export_data (int fd, off_t offset, char **pbuf, size_t *plen,
-		       int *perr)
-{
-  simple_object_read *sobj;
-  const char *errmsg;
-  off_t sec_offset;
-  off_t sec_length;
-  int found;
-  char *buf;
-  ssize_t c;
-
-  *pbuf = NULL;
-  *plen = 0;
-
-  sobj = simple_object_start_read (fd, offset, RUST_EXPORT_SEGMENT_NAME,
-				   &errmsg, perr);
-  if (sobj == NULL)
-    {
-      /* If we get an error here, just pretend that we didn't find any
-	 export data.  This is the right thing to do if the error is
-	 that the file was not recognized as an object file.  This
-	 will ignore file I/O errors, but it's not too big a deal
-	 because we will wind up giving some other error later.  */
-      return NULL;
-    }
-
-  found = simple_object_find_section (sobj, RUST_EXPORT_SECTION_NAME,
-				      &sec_offset, &sec_length, &errmsg, perr);
-  simple_object_release_read (sobj);
-  if (!found)
-    return errmsg;
-
-  if (lseek (fd, offset + sec_offset, SEEK_SET) < 0)
-    {
-      *perr = errno;
-      return _ ("lseek failed while reading export data");
-    }
-
-  buf = XNEWVEC (char, sec_length);
-  if (buf == NULL)
-    {
-      *perr = errno;
-      return _ ("memory allocation failed while reading export data");
-    }
-
-  c = read (fd, buf, sec_length);
-  if (c < 0)
-    {
-      *perr = errno;
-      free (buf);
-      return _ ("read failed while reading export data");
-    }
-
-  if (c < sec_length)
-    {
-      free (buf);
-      return _ ("short read while reading export data");
-    }
-
-  *pbuf = buf;
-  *plen = sec_length;
-
-  return NULL;
-}