Auto merge of #69088 - JohnTitor:rollup-x7bk7h7, r=JohnTitor

Rollup of 11 pull requests

Successful merges:

 - #67695 (Added dyn and true keyword docs)
 - #68487 ([experiment] Support linking from a .rlink file)
 - #68554 (Split lang_items to crates `rustc_hir` and `rustc_passes`.)
 - #68937 (Test failure of unchecked arithmetic intrinsics in const eval)
 - #68947 (Python script PEP8 style guide space formatting and minor Python source cleanup)
 - #68999 (remove dependency on itertools)
 - #69026 (Remove common usage pattern from `AllocRef`)
 - #69027 (Add missing `_zeroed` varants to `AllocRef`)
 - #69058 (Preparation for allocator aware `Box`)
 - #69070 (Add self to .mailmap)
 - #69077 (Fix outdated doc comment.)

Failed merges:

r? @ghost

.mailmap

@@ -114,6 +114,7 @@ James Deng <cnjamesdeng@gmail.com> <cnJamesDeng@gmail.com>
 James Miller <bladeon@gmail.com> <james@aatch.net>
 James Perry <james.austin.perry@gmail.com>
 Jason Fager <jfager@gmail.com>
+Jason Liquorish <jason@liquori.sh> <Bassetts@users.noreply.github.com>
 Jason Orendorff <jorendorff@mozilla.com> <jason.orendorff@gmail.com>
 Jason Orendorff <jorendorff@mozilla.com> <jason@mozmac-2.local>
 Jason Toffaletti <toffaletti@gmail.com> Jason Toffaletti <jason@topsy.com>

Cargo.lock

@@ -3552,6 +3552,7 @@ dependencies = [
  "log",
  "rustc",
  "rustc_ast_pretty",
+ "rustc_codegen_ssa",
  "rustc_codegen_utils",
  "rustc_data_structures",
  "rustc_error_codes",
@@ -3629,6 +3630,7 @@ version = "0.0.0"
 name = "rustc_hir"
 version = "0.0.0"
 dependencies = [
+ "lazy_static 1.4.0",
  "rustc_ast_pretty",
  "rustc_data_structures",
  "rustc_errors",
@@ -3748,7 +3750,6 @@ dependencies = [
 name = "rustc_macros"
 version = "0.1.0"
 dependencies = [
- "itertools 0.8.0",
  "proc-macro2 1.0.3",
  "quote 1.0.2",
  "syn 1.0.11",
@@ -3812,7 +3813,6 @@ name = "rustc_mir_build"
 version = "0.0.0"
 dependencies = [
  "arena",
- "itertools 0.8.0",
  "log",
  "rustc",
  "rustc_apfloat",

src/bootstrap/bootstrap.py

@@ -80,7 +80,7 @@ def _download(path, url, probably_big, verbose, exception):
  option = "-s"
  run(["curl", option,
  "-y", "30", "-Y", "10", # timeout if speed is < 10 bytes/sec for > 30 seconds
- "--connect-timeout", "30", # timeout if cannot connect within 30 seconds
+ "--connect-timeout", "30",  # timeout if cannot connect within 30 seconds
  "--retry", "3", "-Sf", "-o", path, url],
  verbose=verbose,
  exception=exception)
@@ -332,7 +332,6 @@ def __init__(self):
  self.use_vendored_sources = ''
  self.verbose = False
 
-
  def download_stage0(self):
  """Fetch the build system for Rust, written in Rust
 
@@ -351,7 +350,7 @@ def support_xz():
  try:
  with tempfile.NamedTemporaryFile(delete=False) as temp_file:
  temp_path = temp_file.name
- with tarfile.open(temp_path, "w:xz") as tar:
+ with tarfile.open(temp_path, "w:xz"):
  pass
  return True
  except tarfile.CompressionError:
@@ -825,7 +824,7 @@ def check_vendored_status(self):
  if not os.path.exists(vendor_dir):
  print('error: vendoring required, but vendor directory does not exist.')
  print(' Run `cargo vendor` without sudo to initialize the '
- 'vendor directory.')
+  'vendor directory.')
  raise Exception("{} not found".format(vendor_dir))
 
  if self.use_vendored_sources:
@@ -839,7 +838,7 @@ def check_vendored_status(self):
  "\n"
  "[source.vendored-sources]\n"
  "directory = '{}/vendor'\n"
- .format(self.rust_root))
+  .format(self.rust_root))
  else:
  if os.path.exists('.cargo'):
  shutil.rmtree('.cargo')

src/bootstrap/configure.py

@@ -393,11 +393,12 @@ def set(key, value):
 
 
 def is_number(value):
- try:
- float(value)
- return True
- except ValueError:
- return False
+ try:
+ float(value)
+ return True
+ except ValueError:
+ return False
+
 
 # Here we walk through the constructed configuration we have from the parsed
 # command line arguments. We then apply each piece of configuration by

src/ci/cpu-usage-over-time.py

@@ -148,11 +148,11 @@ def idle_since(self, prev):
  print('unknown platform', sys.platform)
  sys.exit(1)
 
-cur_state = State();
+cur_state = State()
 print("Time,Idle")
 while True:
- time.sleep(1);
- next_state = State();
+ time.sleep(1)
+ next_state = State()
  now = datetime.datetime.utcnow().isoformat()
  idle = next_state.idle_since(cur_state)
  print("%s,%s" % (now, idle))

src/etc/debugger_pretty_printers_common.py

@@ -212,7 +212,6 @@ def __classify_struct(self):
  # REGULAR STRUCT
  return TYPE_KIND_REGULAR_STRUCT
 
-
  def __classify_union(self):
  assert self.get_dwarf_type_kind() == DWARF_TYPE_CODE_UNION
 
@@ -233,7 +232,6 @@ def __classify_union(self):
  else:
  return TYPE_KIND_REGULAR_UNION
 
-
  def __conforms_to_field_layout(self, expected_fields):
  actual_fields = self.get_fields()
  actual_field_count = len(actual_fields)
@@ -363,6 +361,7 @@ def extract_tail_head_ptr_and_cap_from_std_vecdeque(vec_val):
  assert data_ptr.type.get_dwarf_type_kind() == DWARF_TYPE_CODE_PTR
  return (tail, head, data_ptr, capacity)
 
+
 def extract_length_and_ptr_from_slice(slice_val):
  assert (slice_val.type.get_type_kind() == TYPE_KIND_SLICE or
  slice_val.type.get_type_kind() == TYPE_KIND_STR_SLICE)
@@ -376,8 +375,10 @@ def extract_length_and_ptr_from_slice(slice_val):
  assert data_ptr.type.get_dwarf_type_kind() == DWARF_TYPE_CODE_PTR
  return (length, data_ptr)
 
+
 UNQUALIFIED_TYPE_MARKERS = frozenset(["(", "[", "&", "*"])
 
+
 def extract_type_name(qualified_type_name):
  """Extracts the type name from a fully qualified path"""
  if qualified_type_name[0] in UNQUALIFIED_TYPE_MARKERS:
@@ -393,6 +394,7 @@ def extract_type_name(qualified_type_name):
  else:
  return qualified_type_name[index + 2:]
 
+
 try:
  compat_str = unicode # Python 2
 except NameError:

src/etc/dec2flt_table.py

@@ -14,7 +14,6 @@
 even larger, and it's already uncomfortably large (6 KiB).
 """
 from __future__ import print_function
-import sys
 from math import ceil, log
 from fractions import Fraction
 from collections import namedtuple
@@ -82,6 +81,7 @@ def error(f, e, z):
  ulp_err = abs_err / Fraction(2) ** z.exp
  return float(ulp_err)
 
+
 HEADER = """
 //! Tables of approximations of powers of ten.
 //! DO NOT MODIFY: Generated by `src/etc/dec2flt_table.py`

src/etc/gdb_rust_pretty_printing.py

@@ -9,7 +9,7 @@
 if sys.version_info[0] >= 3:
  xrange = range
 
-rust_enabled = 'set language rust' in gdb.execute('complete set language ru', to_string = True)
+rust_enabled = 'set language rust' in gdb.execute('complete set language ru', to_string=True)
 
 # The btree pretty-printers fail in a confusing way unless
 # https://sourceware.org/bugzilla/show_bug.cgi?id=21763 is fixed.
@@ -21,9 +21,10 @@
  if int(_match.group(1)) > 8 or (int(_match.group(1)) == 8 and int(_match.group(2)) >= 1):
  gdb_81 = True
 
-#===============================================================================
+# ===============================================================================
 # GDB Pretty Printing Module for Rust
-#===============================================================================
+# ===============================================================================
+
 
 class GdbType(rustpp.Type):
 
@@ -133,39 +134,39 @@ def rust_pretty_printer_lookup_function(gdb_val):
 
  if type_kind == rustpp.TYPE_KIND_REGULAR_STRUCT:
  return RustStructPrinter(val,
- omit_first_field = False,
- omit_type_name = False,
- is_tuple_like = False)
+ omit_first_field=False,
+ omit_type_name=False,
+ is_tuple_like=False)
 
  if type_kind == rustpp.TYPE_KIND_STRUCT_VARIANT:
  return RustStructPrinter(val,
- omit_first_field = True,
- omit_type_name = False,
- is_tuple_like = False)
+ omit_first_field=True,
+ omit_type_name=False,
+ is_tuple_like=False)
 
  if type_kind == rustpp.TYPE_KIND_STR_SLICE:
  return RustStringSlicePrinter(val)
 
  if type_kind == rustpp.TYPE_KIND_TUPLE:
  return RustStructPrinter(val,
- omit_first_field = False,
- omit_type_name = True,
- is_tuple_like = True)
+ omit_first_field=False,
+ omit_type_name=True,
+ is_tuple_like=True)
 
  if type_kind == rustpp.TYPE_KIND_TUPLE_STRUCT:
  return RustStructPrinter(val,
- omit_first_field = False,
- omit_type_name = False,
- is_tuple_like = True)
+ omit_first_field=False,
+ omit_type_name=False,
+ is_tuple_like=True)
 
  if type_kind == rustpp.TYPE_KIND_CSTYLE_VARIANT:
  return RustCStyleVariantPrinter(val.get_child_at_index(0))
 
  if type_kind == rustpp.TYPE_KIND_TUPLE_VARIANT:
  return RustStructPrinter(val,
- omit_first_field = True,
- omit_type_name = False,
- is_tuple_like = True)
+ omit_first_field=True,
+ omit_type_name=False,
+ is_tuple_like=True)
 
  if type_kind == rustpp.TYPE_KIND_SINGLETON_ENUM:
  variant = get_field_at_index(gdb_val, 0)
@@ -189,9 +190,9 @@ def rust_pretty_printer_lookup_function(gdb_val):
  return None
 
 
-#=------------------------------------------------------------------------------
+# =------------------------------------------------------------------------------
 # Pretty Printer Classes
-#=------------------------------------------------------------------------------
+# =------------------------------------------------------------------------------
 class RustEmptyPrinter(object):
  def __init__(self, val):
  self.__val = val
@@ -355,6 +356,7 @@ def children_of_node(boxed_node, height, want_values):
  else:
  yield keys[i]['value']['value']
 
+
 class RustStdBTreeSetPrinter(object):
  def __init__(self, val):
  self.__val = val
@@ -429,6 +431,7 @@ def to_string(self):
  def display_hint(self):
  return "string"
 
+
 class RustCStyleVariantPrinter(object):
  def __init__(self, val):
  assert val.type.get_dwarf_type_kind() == rustpp.DWARF_TYPE_CODE_ENUM

src/etc/generate-deriving-span-tests.py

@@ -8,7 +8,8 @@
 sample usage: src/etc/generate-deriving-span-tests.py
 """
 
-import os, stat
+import os
+import stat
 
 TEST_DIR = os.path.abspath(
  os.path.join(os.path.dirname(__file__), '../test/ui/derives/'))
@@ -56,15 +57,17 @@
 
 ENUM_TUPLE, ENUM_STRUCT, STRUCT_FIELDS, STRUCT_TUPLE = range(4)
 
+
 def create_test_case(type, trait, super_traits, error_count):
  string = [ENUM_STRING, ENUM_STRUCT_VARIANT_STRING, STRUCT_STRING, STRUCT_TUPLE_STRING][type]
  all_traits = ','.join([trait] + super_traits)
  super_traits = ','.join(super_traits)
  error_deriving = '#[derive(%s)]' % super_traits if super_traits else ''
 
  errors = '\n'.join('//~%s ERROR' % ('^' * n) for n in range(error_count))
- code = string.format(traits = all_traits, errors = errors)
- return TEMPLATE.format(error_deriving=error_deriving, code = code)
+ code = string.format(traits=all_traits, errors=errors)
+ return TEMPLATE.format(error_deriving=error_deriving, code=code)
+
 
 def write_file(name, string):
  test_file = os.path.join(TEST_DIR, 'derives-span-%s.rs' % name)
@@ -86,10 +89,10 @@ def write_file(name, string):
 
 traits = {
  'Default': (STRUCT, [], 1),
- 'FromPrimitive': (0, [], 0), # only works for C-like enums
+ 'FromPrimitive': (0, [], 0),  # only works for C-like enums
 
- 'Decodable': (0, [], 0), # FIXME: quoting gives horrible spans
- 'Encodable': (0, [], 0), # FIXME: quoting gives horrible spans
+ 'Decodable': (0, [], 0),  # FIXME: quoting gives horrible spans
+ 'Encodable': (0, [], 0),  # FIXME: quoting gives horrible spans
 }
 
 for (trait, supers, errs) in [('Clone', [], 1),

src/etc/generate-keyword-tests.py

@@ -11,7 +11,6 @@
 
 import sys
 import os
-import datetime
 import stat