diff --git a/tensorflow/workspace.bzl b/tensorflow/workspace.bzl
index 06e16cdb044c0238d317cf210a2c860e4d792f5d..0afa5d53469f29ad9558f836d2e2335362b5270c 100644
--- a/tensorflow/workspace.bzl
+++ b/tensorflow/workspace.bzl
@@ -193,6 +193,16 @@ def tf_workspace(path_prefix = "", tf_repo_name = ""):
     build_file = str(Label("//:linenoise.BUILD")),
   )
 
+  # TODO(phawkins): currently, this rule uses an unofficial LLVM mirror.
+  # Switch to an official source of snapshots if/when possible.
+  native.new_http_archive(
+    name = "llvm",
+    url = "http://github.com/llvm-mirror/llvm/archive/ad27fdae895df1b9ad11a93102de6622f63e1220.tar.gz",
+    sha256 = "ce7abf076586f2ef13dcd1c4e7ba13604a0826a0f44fe0a6faceeb9bdffc8544",
+    strip_prefix = "llvm-ad27fdae895df1b9ad11a93102de6622f63e1220",
+    build_file = str(Label("//third_party/llvm:llvm.BUILD")),
+  )
+
   native.new_http_archive(
     name = "jsoncpp_git",
     url = "http://github.com/open-source-parsers/jsoncpp/archive/11086dd6a7eba04289944367ca82cea71299ed70.tar.gz",
diff --git a/third_party/llvm/BUILD b/third_party/llvm/BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..5b9ec0f8fd57338c5def8ee86af3c5ab2e64dcc1
--- /dev/null
+++ b/third_party/llvm/BUILD
@@ -0,0 +1,7 @@
+licenses(["notice"])
+
+py_binary(
+    name = "expand_cmake_vars",
+    srcs = ["expand_cmake_vars.py"],
+    visibility = ["@llvm//:__subpackages__"],
+)
diff --git "a/third_party/llvm/expand_cmake_vars.py\"" "b/third_party/llvm/expand_cmake_vars.py\""
new file mode 100644
index 0000000000000000000000000000000000000000..51e668428f6646a64b2417e5695eb364fca190ff
--- /dev/null
+++ "b/third_party/llvm/expand_cmake_vars.py\""
@@ -0,0 +1,88 @@
+# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+"""Expands CMake variables in a text file."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import re
+import sys
+
+_CMAKE_DEFINE_REGEX = re.compile(r"\s*#cmakedefine\s+([A-Za-z_0-9]*)(\s.*)?$")
+_CMAKE_DEFINE01_REGEX = re.compile(r"\s*#cmakedefine01\s+([A-Za-z_0-9]*)")
+_CMAKE_VAR_REGEX = re.compile(r"\${([A-Za-z_0-9]*)}")
+
+
+def _parse_args(argv):
+  """Parses arguments with the form KEY=VALUE into a dictionary."""
+  result = {}
+  for arg in argv:
+    k, v = arg.split("=")
+    result[k] = v
+  return result
+
+
+def _expand_variables(input_str, cmake_vars):
+  """Expands ${VARIABLE}s in 'input_str', using dictionary 'cmake_vars'.
+
+  Args:
+    input_str: the string containing ${VARIABLE} expressions to expand.
+    cmake_vars: a dictionary mapping variable names to their values.
+
+  Returns:
+    The expanded string.
+  """
+  def replace(match):
+    if cmake_vars.has_key(match.group(1)):
+      return cmake_vars[match.group(1)]
+    return ""
+  return _CMAKE_VAR_REGEX.sub(replace, input_str)
+
+
+def _expand_cmakedefines(line, cmake_vars):
+  """Expands #cmakedefine declarations, using a dictionary 'cmake_vars'."""
+
+  # Handles #cmakedefine lines
+  match = _CMAKE_DEFINE_REGEX.match(line)
+  if match:
+    name = match.group(1)
+    suffix = match.group(2) or ""
+    if name in cmake_vars:
+      return "#define {}{}\n".format(name,
+                                     _expand_variables(suffix, cmake_vars))
+    else:
+      return "/* #undef {} */\n".format(name)
+
+  # Handles #cmakedefine01 lines
+  match = _CMAKE_DEFINE01_REGEX.match(line)
+  if match:
+    name = match.group(1)
+    value = cmake_vars.get(name, "0")
+    return "#define {} {}\n".format(name, value)
+
+  # Otherwise return the line unchanged.
+  return _expand_variables(line, cmake_vars)
+
+
+def main():
+  cmake_vars = _parse_args(sys.argv[1:])
+  for line in sys.stdin:
+    sys.stdout.write(_expand_cmakedefines(line, cmake_vars))
+
+
+if __name__ == "__main__":
+  main()
diff --git a/third_party/llvm/llvm.BUILD b/third_party/llvm/llvm.BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..6238430cc90e353b5fdbbb5ae0558fcf77dad290
--- /dev/null
+++ b/third_party/llvm/llvm.BUILD
@@ -0,0 +1,1908 @@
+# Bazel BUILD file for LLVM.
+#
+# This BUILD file is auto-generated; do not edit!
+
+licenses(["notice"])
+
+load(
+    "@//third_party/llvm:llvm.bzl",
+    "gentbl",
+    "expand_cmake_vars",
+    "expand_header_template",
+    "llvm_target_cmake_vars",
+    "cmake_var_string",
+)
+
+llvm_host_triple = "x86_64-unknown-linux_gnu"
+
+llvm_targets = [
+    "AArch64",
+    "ARM",
+    "NVPTX",
+    "PowerPC",
+    "X86",
+]
+
+llvm_target_asm_parsers = [
+    "AArch64",
+    "ARM",
+    "PowerPC",
+    "X86",
+]
+
+llvm_target_asm_printers = llvm_target_asm_parsers
+
+llvm_target_disassemblers = llvm_target_asm_parsers
+
+# TODO(phawkins): the set of CMake variables was hardcoded for expediency.
+# However, we should really detect many of these via configure-time tests.
+
+# The set of CMake variables common to all targets.
+cmake_vars = {
+    # Headers
+    "HAVE_DIRENT_H": 1,
+    "HAVE_DLFCN_H": 1,
+    "HAVE_ERRNO_H": 1,
+    "HAVE_EXECINFO_H": 1,
+    "HAVE_FCNTL_H": 1,
+    "HAVE_INTTYPES_H": 1,
+    "HAVE_PTHREAD_H": 1,
+    "HAVE_SIGNAL_H": 1,
+    "HAVE_STDINT_H": 1,
+    "HAVE_SYS_IOCTL_H": 1,
+    "HAVE_SYS_MMAN_H": 1,
+    "HAVE_SYS_PARAM_H": 1,
+    "HAVE_SYS_RESOURCE_H": 1,
+    "HAVE_SYS_STAT_H": 1,
+    "HAVE_SYS_TIME_H": 1,
+    "HAVE_SYS_TYPES_H": 1,
+    "HAVE_TERMIOS_H": 1,
+    "HAVE_UNISTD_H": 1,
+    "HAVE_ZLIB_H": 1,
+
+    # Features
+    "HAVE_BACKTRACE": 1,
+    "HAVE_DLOPEN": 1,
+    "HAVE_FUTIMES": 1,
+    "HAVE_GETCWD": 1,
+    "HAVE_GETPAGESIZE": 1,
+    "HAVE_GETRLIMIT": 1,
+    "HAVE_GETRUSAGE": 1,
+    "HAVE_GETTIMEOFDAY": 1,
+    "HAVE_INT64_T": 1,
+    "HAVE_ISATTY": 1,
+    "HAVE_LIBEDIT": 1,
+    "HAVE_LIBPTHREAD": 1,
+    "HAVE_LIBZ": 1,
+    "HAVE_MKDTEMP": 1,
+    "HAVE_MKSTEMP": 1,
+    "HAVE_MKTEMP": 1,
+    "HAVE_PREAD": 1,
+    "HAVE_PTHREAD_GETSPECIFIC": 1,
+    "HAVE_PTHREAD_MUTEX_LOCK": 1,
+    "HAVE_PTHREAD_RWLOCK_INIT": 1,
+    "HAVE_REALPATH": 1,
+    "HAVE_SBRK": 1,
+    "HAVE_SETENV": 1,
+    "HAVE_SETRLIMIT": 1,
+    "HAVE_SIGALTSTACK": 1,
+    "HAVE_STRERROR": 1,
+    "HAVE_STRERROR_R": 1,
+    "HAVE_STRTOLL": 1,
+    "HAVE_SYSCONF": 1,
+    "HAVE_UINT64_T": 1,
+    "HAVE__UNWIND_BACKTRACE": 1,
+
+    # LLVM features
+    "ENABLE_BACKTRACES": 1,
+    "LLVM_BINDIR": "/dev/null",
+    "LLVM_ENABLE_THREADS": 1,
+    "LLVM_ENABLE_ZLIB": 1,
+    "LLVM_HAS_ATOMICS": 1,
+    "LLVM_INCLUDEDIR": "/dev/null",
+    "LLVM_INFODIR": "/dev/null",
+    "LLVM_MANDIR": "/dev/null",
+    "LLVM_NATIVE_TARGET": 1,
+    "LLVM_NATIVE_TARGETINFO": 1,
+    "LLVM_NATIVE_TARGETMC": 1,
+    "LLVM_NATIVE_ASMPRINTER": 1,
+    "LLVM_NATIVE_ASMPARSER": 1,
+    "LLVM_NATIVE_DISASSEMBLER": 1,
+    "LLVM_ON_UNIX": 1,
+    "LLVM_PREFIX": "/dev/null",
+    "LLVM_VERSION_MAJOR": 0,
+    "LLVM_VERSION_MINOR": 0,
+    "LLVM_VERSION_PATCH": 0,
+    "LTDL_SHLIB_EXT": ".so",
+    "PACKAGE_NAME": "llvm",
+    "PACKAGE_STRING": "llvm tensorflow-trunk",
+    "PACKAGE_VERSION": "tensorflow-trunk",
+    "RETSIGTYPE": "void",
+}
+
+# CMake variables specific to the Linux platform
+linux_cmake_vars = {
+    "HAVE_MALLOC_H": 1,
+    "HAVE_LINK_H": 1,
+    "HAVE_MALLINFO": 1,
+    "HAVE_FUTIMENS": 1,
+}
+
+# CMake variables specific to the Darwin (Mac OS X) platform.
+darwin_cmake_vars = {
+    "HAVE_MALLOC_MALLOC_H": 1,
+}
+
+# Select a set of CMake variables based on the platform.
+# TODO(phawkins): use a better method to select the right host triple, rather
+# than hardcoding x86_64.
+all_cmake_vars = select({
+    "@//tensorflow:darwin": cmake_var_string(
+        cmake_vars + llvm_target_cmake_vars("X86", "x86_64-apple-darwin") +
+        darwin_cmake_vars,
+    ),
+    "//conditions:default": cmake_var_string(
+        cmake_vars +
+        llvm_target_cmake_vars("X86", "x86_64-unknown-linux_gnu") +
+        linux_cmake_vars,
+    ),
+})
+
+# Performs CMake variable substitutions on configuration header files.
+expand_cmake_vars(
+    name = "datatypes_gen",
+    src = "include/llvm/Support/DataTypes.h.cmake",
+    cmake_vars = all_cmake_vars,
+    dst = "include/llvm/Support/DataTypes.h",
+)
+
+expand_cmake_vars(
+    name = "config_gen",
+    src = "include/llvm/Config/config.h.cmake",
+    cmake_vars = all_cmake_vars,
+    dst = "include/llvm/Config/config.h",
+)
+
+expand_cmake_vars(
+    name = "llvm_config_gen",
+    src = "include/llvm/Config/llvm-config.h.cmake",
+    cmake_vars = all_cmake_vars,
+    dst = "include/llvm/Config/llvm-config.h",
+)
+
+# Performs macro expansions on .def.in files
+expand_header_template(
+    name = "targets_def_gen",
+    out = "include/llvm/Config/Targets.def",
+    substitutions = {
+        "@LLVM_ENUM_TARGETS@": "\n".join(
+            ["LLVM_TARGET({})".format(t) for t in llvm_targets],
+        ),
+    },
+    template = "include/llvm/Config/Targets.def.in",
+)
+
+expand_header_template(
+    name = "asm_parsers_def_gen",
+    out = "include/llvm/Config/AsmParsers.def",
+    substitutions = {
+        "@LLVM_ENUM_ASM_PARSERS@": "\n".join(
+            ["LLVM_ASM_PARSER({})".format(t) for t in llvm_target_asm_parsers],
+        ),
+    },
+    template = "include/llvm/Config/AsmParsers.def.in",
+)
+
+expand_header_template(
+    name = "asm_printers_def_gen",
+    out = "include/llvm/Config/AsmPrinters.def",
+    substitutions = {
+        "@LLVM_ENUM_ASM_PRINTERS@": "\n".join(
+            ["LLVM_ASM_PRINTER({})".format(t) for t in llvm_target_asm_printers],
+        ),
+    },
+    template = "include/llvm/Config/AsmPrinters.def.in",
+)
+
+expand_header_template(
+    name = "disassemblers_def_gen",
+    out = "include/llvm/Config/Disassemblers.def",
+    substitutions = {
+        "@LLVM_ENUM_DISASSEMBLERS@": "\n".join(
+            ["LLVM_DISASSEMBLER({})".format(t) for t in llvm_target_disassemblers],
+        ),
+    },
+    template = "include/llvm/Config/Disassemblers.def.in",
+)
+
+# A common library that all LLVM targets depend on.
+cc_library(
+    name = "config",
+    hdrs = [
+        "include/llvm/Config/AsmParsers.def",
+        "include/llvm/Config/AsmPrinters.def",
+        "include/llvm/Config/Disassemblers.def",
+        "include/llvm/Config/Targets.def",
+        "include/llvm/Config/config.h",
+        "include/llvm/Config/llvm-config.h",
+    ],
+    defines = [
+        "LLVM_ENABLE_STATS",
+        "__STDC_LIMIT_MACROS",
+        "__STDC_CONSTANT_MACROS",
+        "_DEBUG",
+        "LLVM_BUILD_GLOBAL_ISEL",
+    ],
+    includes = ["include"],
+)
+
+# Rules that apply the LLVM tblgen tool.
+gentbl(
+    name = "intrinsics_gen",
+    tbl_outs = [("-gen-intrinsic", "include/llvm/IR/Intrinsics.gen")],
+    tblgen = ":llvm-tblgen",
+    td_file = "include/llvm/IR/Intrinsics.td",
+    td_srcs = glob([
+        "include/llvm/CodeGen/*.td",
+        "include/llvm/IR/Intrinsics*.td",
+    ]),
+)
+
+gentbl(
+    name = "attributes_gen",
+    tbl_outs = [("-gen-attrs", "include/llvm/IR/Attributes.gen")],
+    tblgen = ":llvm-tblgen",
+    td_file = "include/llvm/IR/Attributes.td",
+    td_srcs = ["include/llvm/IR/Attributes.td"],
+)
+
+gentbl(
+    name = "attributes_compat_gen",
+    tbl_outs = [("-gen-attrs", "lib/IR/AttributesCompatFunc.inc")],
+    tblgen = ":llvm-tblgen",
+    td_file = "lib/IR/AttributesCompatFunc.td",
+    td_srcs = [
+        "lib/IR/AttributesCompatFunc.td",
+        "include/llvm/IR/Attributes.td",
+    ],
+)
+
+# Binary targets used by Tensorflow.
+cc_binary(
+    name = "llvm-tblgen",
+    srcs = glob([
+        "utils/TableGen/*.cpp",
+        "utils/TableGen/*.h",
+    ]) + [
+        "lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h",
+    ],
+    linkopts = [
+        "-ldl",
+        "-lpthread",
+    ],
+    stamp = 0,
+    deps = [
+        ":config",
+        ":support",
+        ":table_gen",
+    ],
+)
+
+cc_binary(
+    name = "FileCheck",
+    testonly = 1,
+    srcs = glob([
+        "utils/FileCheck/*.cpp",
+        "utils/FileCheck/*.h",
+    ]),
+    linkopts = [
+        "-ldl",
+        "-lpthread",
+    ],
+    stamp = 0,
+    deps = [":support"],
+)
+
+llvm_target_list = [
+    {
+        "name": "AArch64",
+        "lower_name": "aarch64",
+        "short_name": "AArch64",
+        "tbl_outs": [
+            ("-gen-register-info", "lib/Target/AArch64/AArch64GenRegisterInfo.inc"),
+            ("-gen-instr-info", "lib/Target/AArch64/AArch64GenInstrInfo.inc"),
+            ("-gen-emitter", "lib/Target/AArch64/AArch64GenMCCodeEmitter.inc"),
+            ("-gen-pseudo-lowering", "lib/Target/AArch64/AArch64GenMCPseudoLowering.inc"),
+            ("-gen-asm-writer", "lib/Target/AArch64/AArch64GenAsmWriter.inc"),
+            ("-gen-asm-writer -asmwriternum=1", "lib/Target/AArch64/AArch64GenAsmWriter1.inc"),
+            ("-gen-asm-matcher", "lib/Target/AArch64/AArch64GenAsmMatcher.inc"),
+            ("-gen-dag-isel", "lib/Target/AArch64/AArch64GenDAGISel.inc"),
+            ("-gen-fast-isel", "lib/Target/AArch64/AArch64GenFastISel.inc"),
+            ("-gen-callingconv", "lib/Target/AArch64/AArch64GenCallingConv.inc"),
+            ("-gen-subtarget", "lib/Target/AArch64/AArch64GenSubtargetInfo.inc"),
+            ("-gen-disassembler", "lib/Target/AArch64/AArch64GenDisassemblerTables.inc"),
+            ("-gen-searchable-tables", "lib/Target/AArch64/AArch64GenSystemOperands.inc"),
+        ],
+    },
+    {
+        "name": "ARM",
+        "lower_name": "arm",
+        "short_name": "ARM",
+        "tbl_outs": [
+            ("-gen-register-info", "lib/Target/ARM/ARMGenRegisterInfo.inc"),
+            ("-gen-instr-info", "lib/Target/ARM/ARMGenInstrInfo.inc"),
+            ("-gen-emitter", "lib/Target/ARM/ARMGenMCCodeEmitter.inc"),
+            ("-gen-pseudo-lowering", "lib/Target/ARM/ARMGenMCPseudoLowering.inc"),
+            ("-gen-asm-writer", "lib/Target/ARM/ARMGenAsmWriter.inc"),
+            ("-gen-asm-matcher", "lib/Target/ARM/ARMGenAsmMatcher.inc"),
+            ("-gen-dag-isel", "lib/Target/ARM/ARMGenDAGISel.inc"),
+            ("-gen-fast-isel", "lib/Target/ARM/ARMGenFastISel.inc"),
+            ("-gen-callingconv", "lib/Target/ARM/ARMGenCallingConv.inc"),
+            ("-gen-subtarget", "lib/Target/ARM/ARMGenSubtargetInfo.inc"),
+            ("-gen-disassembler", "lib/Target/ARM/ARMGenDisassemblerTables.inc"),
+        ],
+    },
+    {
+        "name": "NVPTX",
+        "lower_name": "nvptx",
+        "short_name": "NVPTX",
+        "tbl_outs": [
+            ("-gen-register-info", "lib/Target/NVPTX/NVPTXGenRegisterInfo.inc"),
+            ("-gen-instr-info", "lib/Target/NVPTX/NVPTXGenInstrInfo.inc"),
+            ("-gen-asm-writer", "lib/Target/NVPTX/NVPTXGenAsmWriter.inc"),
+            ("-gen-dag-isel", "lib/Target/NVPTX/NVPTXGenDAGISel.inc"),
+            ("-gen-subtarget", "lib/Target/NVPTX/NVPTXGenSubtargetInfo.inc"),
+        ],
+    },
+    {
+        "name": "PowerPC",
+        "lower_name": "powerpc",
+        "short_name": "PPC",
+        "tbl_outs": [
+            ("-gen-asm-writer", "lib/Target/PowerPC/PPCGenAsmWriter.inc"),
+            ("-gen-asm-matcher", "lib/Target/PowerPC/PPCGenAsmMatcher.inc"),
+            ("-gen-emitter", "lib/Target/PowerPC/PPCGenMCCodeEmitter.inc"),
+            ("-gen-register-info", "lib/Target/PowerPC/PPCGenRegisterInfo.inc"),
+            ("-gen-instr-info", "lib/Target/PowerPC/PPCGenInstrInfo.inc"),
+            ("-gen-dag-isel", "lib/Target/PowerPC/PPCGenDAGISel.inc"),
+            ("-gen-fast-isel", "lib/Target/PowerPC/PPCGenFastISel.inc"),
+            ("-gen-callingconv", "lib/Target/PowerPC/PPCGenCallingConv.inc"),
+            ("-gen-subtarget", "lib/Target/PowerPC/PPCGenSubtargetInfo.inc"),
+            ("-gen-disassembler", "lib/Target/PowerPC/PPCGenDisassemblerTables.inc"),
+        ],
+    },
+    {
+        "name": "X86",
+        "lower_name": "x86",
+        "short_name": "X86",
+        "tbl_outs": [
+            ("-gen-register-info", "lib/Target/X86/X86GenRegisterInfo.inc"),
+            ("-gen-disassembler", "lib/Target/X86/X86GenDisassemblerTables.inc"),
+            ("-gen-instr-info", "lib/Target/X86/X86GenInstrInfo.inc"),
+            ("-gen-asm-writer", "lib/Target/X86/X86GenAsmWriter.inc"),
+            ("-gen-asm-writer -asmwriternum=1", "lib/Target/X86/X86GenAsmWriter1.inc"),
+            ("-gen-asm-matcher", "lib/Target/X86/X86GenAsmMatcher.inc"),
+            ("-gen-dag-isel", "lib/Target/X86/X86GenDAGISel.inc"),
+            ("-gen-fast-isel", "lib/Target/X86/X86GenFastISel.inc"),
+            ("-gen-callingconv", "lib/Target/X86/X86GenCallingConv.inc"),
+            ("-gen-subtarget", "lib/Target/X86/X86GenSubtargetInfo.inc"),
+        ],
+    },
+]
+
+[
+    gentbl(
+        name = target["lower_name"] + "_target_gen",
+        tbl_outs = target["tbl_outs"],
+        tblgen = ":llvm-tblgen",
+        td_file = ("lib/Target/" + target["name"] + "/" + target["short_name"] +
+                   ".td"),
+        td_srcs = glob([
+            "lib/Target/" + target["name"] + "/*.td",
+            "include/llvm/CodeGen/*.td",
+            "include/llvm/IR/Intrinsics*.td",
+            "include/llvm/TableGen/*.td",
+            "include/llvm/Target/*.td",
+        ]),
+    )
+    for target in llvm_target_list
+]
+
+cc_library(
+    name = "aarch64_asm_parser",
+    srcs = glob([
+        "lib/Target/AArch64/AsmParser/*.c",
+        "lib/Target/AArch64/AsmParser/*.cpp",
+        "lib/Target/AArch64/AsmParser/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/AsmParser/*.h",
+        "include/llvm/Target/AArch64/AsmParser/*.def",
+        "include/llvm/Target/AArch64/AsmParser/*.inc",
+        "lib/Target/AArch64/AsmParser/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_desc",
+        ":aarch64_info",
+        ":aarch64_utils",
+        ":config",
+        ":mc",
+        ":mc_parser",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "aarch64_asm_printer",
+    srcs = glob([
+        "lib/Target/AArch64/InstPrinter/*.c",
+        "lib/Target/AArch64/InstPrinter/*.cpp",
+        "lib/Target/AArch64/InstPrinter/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/InstPrinter/*.h",
+        "include/llvm/Target/AArch64/InstPrinter/*.def",
+        "include/llvm/Target/AArch64/InstPrinter/*.inc",
+        "lib/Target/AArch64/InstPrinter/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_target_gen",
+        ":aarch64_utils",
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "aarch64_code_gen",
+    srcs = glob([
+        "lib/Target/AArch64/*.c",
+        "lib/Target/AArch64/*.cpp",
+        "lib/Target/AArch64/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/*.h",
+        "include/llvm/Target/AArch64/*.def",
+        "include/llvm/Target/AArch64/*.inc",
+        "lib/Target/AArch64/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_asm_printer",
+        ":aarch64_desc",
+        ":aarch64_info",
+        ":aarch64_utils",
+        ":analysis",
+        ":asm_printer",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":global_i_sel",
+        ":mc",
+        ":scalar",
+        ":selection_dag",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "aarch64_desc",
+    srcs = glob([
+        "lib/Target/AArch64/MCTargetDesc/*.c",
+        "lib/Target/AArch64/MCTargetDesc/*.cpp",
+        "lib/Target/AArch64/MCTargetDesc/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/MCTargetDesc/*.h",
+        "include/llvm/Target/AArch64/MCTargetDesc/*.def",
+        "include/llvm/Target/AArch64/MCTargetDesc/*.inc",
+        "lib/Target/AArch64/MCTargetDesc/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_asm_printer",
+        ":aarch64_info",
+        ":aarch64_target_gen",
+        ":attributes_gen",
+        ":config",
+        ":intrinsics_gen",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "aarch64_disassembler",
+    srcs = glob([
+        "lib/Target/AArch64/Disassembler/*.c",
+        "lib/Target/AArch64/Disassembler/*.cpp",
+        "lib/Target/AArch64/Disassembler/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/Disassembler/*.h",
+        "include/llvm/Target/AArch64/Disassembler/*.def",
+        "include/llvm/Target/AArch64/Disassembler/*.inc",
+        "lib/Target/AArch64/Disassembler/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_desc",
+        ":aarch64_info",
+        ":aarch64_utils",
+        ":config",
+        ":mc",
+        ":mc_disassembler",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "aarch64_info",
+    srcs = glob([
+        "lib/Target/AArch64/TargetInfo/*.c",
+        "lib/Target/AArch64/TargetInfo/*.cpp",
+        "lib/Target/AArch64/TargetInfo/*.inc",
+        "lib/Target/AArch64/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/TargetInfo/*.h",
+        "include/llvm/Target/AArch64/TargetInfo/*.def",
+        "include/llvm/Target/AArch64/TargetInfo/*.inc",
+        "lib/Target/AArch64/*.def",
+        "lib/Target/AArch64/AArch64*.h",
+        "lib/Target/AArch64/TargetInfo/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":code_gen",
+        ":config",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "aarch64_utils",
+    srcs = glob([
+        "lib/Target/AArch64/Utils/*.c",
+        "lib/Target/AArch64/Utils/*.cpp",
+        "lib/Target/AArch64/Utils/*.inc",
+        "lib/Target/AArch64/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/AArch64/Utils/*.h",
+        "include/llvm/Target/AArch64/Utils/*.def",
+        "include/llvm/Target/AArch64/Utils/*.inc",
+        "lib/Target/AArch64/Utils/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/AArch64"],
+    deps = [
+        ":aarch64_target_gen",
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "analysis",
+    srcs = glob([
+        "lib/Analysis/*.c",
+        "lib/Analysis/*.cpp",
+        "lib/Analysis/*.inc",
+        "include/llvm/Transforms/Utils/Local.h",
+        "lib/Analysis/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Analysis/*.h",
+        "include/llvm/Analysis/*.def",
+        "include/llvm/Analysis/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":object",
+        ":profile_data",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "arm_asm_parser",
+    srcs = glob([
+        "lib/Target/ARM/AsmParser/*.c",
+        "lib/Target/ARM/AsmParser/*.cpp",
+        "lib/Target/ARM/AsmParser/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/AsmParser/*.h",
+        "include/llvm/Target/ARM/AsmParser/*.def",
+        "include/llvm/Target/ARM/AsmParser/*.inc",
+        "lib/Target/ARM/AsmParser/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":arm_desc",
+        ":arm_info",
+        ":config",
+        ":mc",
+        ":mc_parser",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "arm_asm_printer",
+    srcs = glob([
+        "lib/Target/ARM/InstPrinter/*.c",
+        "lib/Target/ARM/InstPrinter/*.cpp",
+        "lib/Target/ARM/InstPrinter/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/InstPrinter/*.h",
+        "include/llvm/Target/ARM/InstPrinter/*.def",
+        "include/llvm/Target/ARM/InstPrinter/*.inc",
+        "lib/Target/ARM/InstPrinter/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":arm_info",
+        ":arm_target_gen",
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "arm_code_gen",
+    srcs = glob([
+        "lib/Target/ARM/*.c",
+        "lib/Target/ARM/*.cpp",
+        "lib/Target/ARM/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/*.h",
+        "include/llvm/Target/ARM/*.def",
+        "include/llvm/Target/ARM/*.inc",
+        "lib/Target/ARM/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":analysis",
+        ":arm_asm_printer",
+        ":arm_desc",
+        ":arm_info",
+        ":asm_printer",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":global_i_sel",
+        ":mc",
+        ":scalar",
+        ":selection_dag",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "arm_desc",
+    srcs = glob([
+        "lib/Target/ARM/MCTargetDesc/*.c",
+        "lib/Target/ARM/MCTargetDesc/*.cpp",
+        "lib/Target/ARM/MCTargetDesc/*.inc",
+        "lib/Target/ARM/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/MCTargetDesc/*.h",
+        "include/llvm/Target/ARM/MCTargetDesc/*.def",
+        "include/llvm/Target/ARM/MCTargetDesc/*.inc",
+        "lib/Target/ARM/MCTargetDesc/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":arm_asm_printer",
+        ":arm_info",
+        ":arm_target_gen",
+        ":attributes_gen",
+        ":config",
+        ":intrinsics_gen",
+        ":mc",
+        ":mc_disassembler",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "arm_disassembler",
+    srcs = glob([
+        "lib/Target/ARM/Disassembler/*.c",
+        "lib/Target/ARM/Disassembler/*.cpp",
+        "lib/Target/ARM/Disassembler/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/Disassembler/*.h",
+        "include/llvm/Target/ARM/Disassembler/*.def",
+        "include/llvm/Target/ARM/Disassembler/*.inc",
+        "lib/Target/ARM/Disassembler/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":arm_desc",
+        ":arm_info",
+        ":config",
+        ":mc_disassembler",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "arm_info",
+    srcs = glob([
+        "lib/Target/ARM/TargetInfo/*.c",
+        "lib/Target/ARM/TargetInfo/*.cpp",
+        "lib/Target/ARM/TargetInfo/*.inc",
+        "lib/Target/ARM/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/ARM/TargetInfo/*.h",
+        "include/llvm/Target/ARM/TargetInfo/*.def",
+        "include/llvm/Target/ARM/TargetInfo/*.inc",
+        "lib/Target/ARM/TargetInfo/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/ARM"],
+    deps = [
+        ":arm_target_gen",
+        ":config",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "asm_parser",
+    srcs = glob([
+        "lib/AsmParser/*.c",
+        "lib/AsmParser/*.cpp",
+        "lib/AsmParser/*.inc",
+        "lib/AsmParser/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/AsmParser/*.h",
+        "include/llvm/AsmParser/*.def",
+        "include/llvm/AsmParser/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "asm_printer",
+    srcs = glob([
+        "lib/CodeGen/AsmPrinter/*.c",
+        "lib/CodeGen/AsmPrinter/*.cpp",
+        "lib/CodeGen/AsmPrinter/*.inc",
+        "lib/CodeGen/AsmPrinter/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/CodeGen/AsmPrinter/*.h",
+        "include/llvm/CodeGen/AsmPrinter/*.def",
+        "include/llvm/CodeGen/AsmPrinter/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":debug_info_code_view",
+        ":debug_info_msf",
+        ":mc",
+        ":mc_parser",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "bit_reader",
+    srcs = glob([
+        "lib/Bitcode/Reader/*.c",
+        "lib/Bitcode/Reader/*.cpp",
+        "lib/Bitcode/Reader/*.inc",
+        "lib/Bitcode/Reader/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Bitcode/Reader/*.h",
+        "include/llvm/Bitcode/Reader/*.def",
+        "include/llvm/Bitcode/Reader/*.inc",
+        "include/llvm/Bitcode/BitstreamReader.h",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "bit_writer",
+    srcs = glob([
+        "lib/Bitcode/Writer/*.c",
+        "lib/Bitcode/Writer/*.cpp",
+        "lib/Bitcode/Writer/*.inc",
+        "lib/Bitcode/Writer/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Bitcode/Writer/*.h",
+        "include/llvm/Bitcode/Writer/*.def",
+        "include/llvm/Bitcode/Writer/*.inc",
+        "include/llvm/Bitcode/BitcodeWriter.h",
+        "include/llvm/Bitcode/BitcodeWriterPass.h",
+        "include/llvm/Bitcode/BitstreamWriter.h",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "code_gen",
+    srcs = glob([
+        "lib/CodeGen/*.c",
+        "lib/CodeGen/*.cpp",
+        "lib/CodeGen/*.inc",
+        "lib/CodeGen/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/CodeGen/*.h",
+        "include/llvm/CodeGen/*.def",
+        "include/llvm/CodeGen/*.inc",
+        "include/llvm/CodeGen/**/*.h",
+    ]),
+    deps = [
+        ":analysis",
+        ":bit_reader",
+        ":bit_writer",
+        ":config",
+        ":core",
+        ":instrumentation",
+        ":mc",
+        ":profile_data",
+        ":scalar",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "core",
+    srcs = glob([
+        "lib/IR/*.c",
+        "lib/IR/*.cpp",
+        "lib/IR/*.inc",
+        "include/llvm/Analysis/*.h",
+        "include/llvm/Bitcode/BitcodeReader.h",
+        "include/llvm/Bitcode/BitCodes.h",
+        "include/llvm/Bitcode/LLVMBitCodes.h",
+        "include/llvm/CodeGen/MachineValueType.h",
+        "include/llvm/CodeGen/ValueTypes.h",
+        "lib/IR/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/IR/*.h",
+        "include/llvm/IR/*.def",
+        "include/llvm/IR/*.inc",
+        "include/llvm/*.h",
+    ]),
+    deps = [
+        ":attributes_compat_gen",
+        ":attributes_gen",
+        ":config",
+        ":intrinsics_gen",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "debug_info_code_view",
+    srcs = glob([
+        "lib/DebugInfo/CodeView/*.c",
+        "lib/DebugInfo/CodeView/*.cpp",
+        "lib/DebugInfo/CodeView/*.inc",
+        "lib/DebugInfo/CodeView/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/DebugInfo/CodeView/*.h",
+        "include/llvm/DebugInfo/CodeView/*.def",
+        "include/llvm/DebugInfo/CodeView/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":debug_info_msf",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "debug_info_msf",
+    srcs = glob([
+        "lib/DebugInfo/MSF/*.c",
+        "lib/DebugInfo/MSF/*.cpp",
+        "lib/DebugInfo/MSF/*.inc",
+        "lib/DebugInfo/MSF/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/DebugInfo/MSF/*.h",
+        "include/llvm/DebugInfo/MSF/*.def",
+        "include/llvm/DebugInfo/MSF/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "demangle",
+    srcs = glob([
+        "lib/Demangle/*.c",
+        "lib/Demangle/*.cpp",
+        "lib/Demangle/*.inc",
+        "lib/Demangle/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Demangle/*.h",
+        "include/llvm/Demangle/*.def",
+        "include/llvm/Demangle/*.inc",
+    ]),
+    deps = [":config"],
+)
+
+cc_library(
+    name = "execution_engine",
+    srcs = glob([
+        "lib/ExecutionEngine/*.c",
+        "lib/ExecutionEngine/*.cpp",
+        "lib/ExecutionEngine/*.inc",
+        "lib/ExecutionEngine/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/ExecutionEngine/*.h",
+        "include/llvm/ExecutionEngine/*.def",
+        "include/llvm/ExecutionEngine/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":mc",
+        ":object",
+        ":runtime_dyld",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "global_i_sel",
+    srcs = glob([
+        "lib/CodeGen/GlobalISel/*.c",
+        "lib/CodeGen/GlobalISel/*.cpp",
+        "lib/CodeGen/GlobalISel/*.inc",
+        "lib/CodeGen/GlobalISel/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/CodeGen/GlobalISel/*.h",
+        "include/llvm/CodeGen/GlobalISel/*.def",
+        "include/llvm/CodeGen/GlobalISel/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":mc",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "instrumentation",
+    srcs = glob([
+        "lib/Transforms/Instrumentation/*.c",
+        "lib/Transforms/Instrumentation/*.cpp",
+        "lib/Transforms/Instrumentation/*.inc",
+        "lib/Transforms/Instrumentation/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/Instrumentation/*.h",
+        "include/llvm/Transforms/Instrumentation/*.def",
+        "include/llvm/Transforms/Instrumentation/*.inc",
+        "include/llvm/Transforms/GCovProfiler.h",
+        "include/llvm/Transforms/Instrumentation.h",
+        "include/llvm/Transforms/InstrProfiling.h",
+        "include/llvm/Transforms/PGOInstrumentation.h",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":mc",
+        ":profile_data",
+        ":support",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "inst_combine",
+    srcs = glob([
+        "lib/Transforms/InstCombine/*.c",
+        "lib/Transforms/InstCombine/*.cpp",
+        "lib/Transforms/InstCombine/*.inc",
+        "lib/Transforms/InstCombine/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/InstCombine/*.h",
+        "include/llvm/Transforms/InstCombine/*.def",
+        "include/llvm/Transforms/InstCombine/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":support",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "ipo",
+    srcs = glob([
+        "lib/Transforms/IPO/*.c",
+        "lib/Transforms/IPO/*.cpp",
+        "lib/Transforms/IPO/*.inc",
+        "lib/Transforms/IPO/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/IPO/*.h",
+        "include/llvm/Transforms/IPO/*.def",
+        "include/llvm/Transforms/IPO/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":inst_combine",
+        ":instrumentation",
+        ":ir_reader",
+        ":linker",
+        ":object",
+        ":profile_data",
+        ":scalar",
+        ":support",
+        ":transform_utils",
+        ":vectorize",
+    ],
+)
+
+cc_library(
+    name = "ir_reader",
+    srcs = glob([
+        "lib/IRReader/*.c",
+        "lib/IRReader/*.cpp",
+        "lib/IRReader/*.inc",
+        "lib/IRReader/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/IRReader/*.h",
+        "include/llvm/IRReader/*.def",
+        "include/llvm/IRReader/*.inc",
+    ]),
+    deps = [
+        ":asm_parser",
+        ":bit_reader",
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "linker",
+    srcs = glob([
+        "lib/Linker/*.c",
+        "lib/Linker/*.cpp",
+        "lib/Linker/*.inc",
+        "lib/Linker/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Linker/*.h",
+        "include/llvm/Linker/*.def",
+        "include/llvm/Linker/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":support",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "mc",
+    srcs = glob([
+        "lib/MC/*.c",
+        "lib/MC/*.cpp",
+        "lib/MC/*.inc",
+        "lib/MC/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/MC/*.h",
+        "include/llvm/MC/*.def",
+        "include/llvm/MC/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":debug_info_code_view",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "mc_disassembler",
+    srcs = glob([
+        "lib/MC/MCDisassembler/*.c",
+        "lib/MC/MCDisassembler/*.cpp",
+        "lib/MC/MCDisassembler/*.inc",
+        "lib/MC/MCDisassembler/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/MC/MCDisassembler/*.h",
+        "include/llvm/MC/MCDisassembler/*.def",
+        "include/llvm/MC/MCDisassembler/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "mc_parser",
+    srcs = glob([
+        "lib/MC/MCParser/*.c",
+        "lib/MC/MCParser/*.cpp",
+        "lib/MC/MCParser/*.inc",
+        "lib/MC/MCParser/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/MC/MCParser/*.h",
+        "include/llvm/MC/MCParser/*.def",
+        "include/llvm/MC/MCParser/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "nvptx_asm_printer",
+    srcs = glob([
+        "lib/Target/NVPTX/InstPrinter/*.c",
+        "lib/Target/NVPTX/InstPrinter/*.cpp",
+        "lib/Target/NVPTX/InstPrinter/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/NVPTX/InstPrinter/*.h",
+        "include/llvm/Target/NVPTX/InstPrinter/*.def",
+        "include/llvm/Target/NVPTX/InstPrinter/*.inc",
+        "lib/Target/NVPTX/InstPrinter/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/NVPTX"],
+    deps = [
+        "nvptx_target_gen",
+        ":attributes_gen",
+        ":config",
+        ":mc",
+        ":nvptx_info",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "nvptx_code_gen",
+    srcs = glob([
+        "lib/Target/NVPTX/*.c",
+        "lib/Target/NVPTX/*.cpp",
+        "lib/Target/NVPTX/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/NVPTX/*.h",
+        "include/llvm/Target/NVPTX/*.def",
+        "include/llvm/Target/NVPTX/*.inc",
+        "lib/Target/NVPTX/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/NVPTX"],
+    deps = [
+        ":analysis",
+        ":asm_printer",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":mc",
+        ":nvptx_asm_printer",
+        ":nvptx_desc",
+        ":nvptx_info",
+        ":scalar",
+        ":selection_dag",
+        ":support",
+        ":target",
+        ":transform_utils",
+        ":vectorize",
+    ],
+)
+
+cc_library(
+    name = "nvptx_desc",
+    srcs = glob([
+        "lib/Target/NVPTX/MCTargetDesc/*.c",
+        "lib/Target/NVPTX/MCTargetDesc/*.cpp",
+        "lib/Target/NVPTX/MCTargetDesc/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/NVPTX/MCTargetDesc/*.h",
+        "include/llvm/Target/NVPTX/MCTargetDesc/*.def",
+        "include/llvm/Target/NVPTX/MCTargetDesc/*.inc",
+        "lib/Target/NVPTX/MCTargetDesc/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/NVPTX"],
+    deps = [
+        "nvptx_target_gen",
+        ":config",
+        ":mc",
+        ":nvptx_asm_printer",
+        ":nvptx_info",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "nvptx_info",
+    srcs = glob([
+        "lib/Target/NVPTX/TargetInfo/*.c",
+        "lib/Target/NVPTX/TargetInfo/*.cpp",
+        "lib/Target/NVPTX/TargetInfo/*.inc",
+        "lib/Target/NVPTX/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/NVPTX/TargetInfo/*.h",
+        "include/llvm/Target/NVPTX/TargetInfo/*.def",
+        "include/llvm/Target/NVPTX/TargetInfo/*.inc",
+        "lib/Target/NVPTX/NVPTX.h",
+        "lib/Target/NVPTX/TargetInfo/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/NVPTX"],
+    deps = [
+        "nvptx_target_gen",
+        ":attributes_gen",
+        ":config",
+        ":core",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "object",
+    srcs = glob([
+        "lib/Object/*.c",
+        "lib/Object/*.cpp",
+        "lib/Object/*.inc",
+        "lib/Object/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Object/*.h",
+        "include/llvm/Object/*.def",
+        "include/llvm/Object/*.inc",
+    ]),
+    deps = [
+        ":bit_reader",
+        ":config",
+        ":core",
+        ":mc",
+        ":mc_parser",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "orc_jit",
+    srcs = glob([
+        "lib/ExecutionEngine/Orc/*.c",
+        "lib/ExecutionEngine/Orc/*.cpp",
+        "lib/ExecutionEngine/Orc/*.inc",
+        "lib/ExecutionEngine/Orc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/ExecutionEngine/Orc/*.h",
+        "include/llvm/ExecutionEngine/Orc/*.def",
+        "include/llvm/ExecutionEngine/Orc/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":execution_engine",
+        ":object",
+        ":runtime_dyld",
+        ":support",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "powerpc_asm_parser",
+    srcs = glob([
+        "lib/Target/PowerPC/AsmParser/*.c",
+        "lib/Target/PowerPC/AsmParser/*.cpp",
+        "lib/Target/PowerPC/AsmParser/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/AsmParser/*.h",
+        "include/llvm/Target/PowerPC/AsmParser/*.def",
+        "include/llvm/Target/PowerPC/AsmParser/*.inc",
+        "lib/Target/PowerPC/AsmParser/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":config",
+        ":mc",
+        ":mc_parser",
+        ":powerpc_desc",
+        ":powerpc_info",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "powerpc_asm_printer",
+    srcs = glob([
+        "lib/Target/PowerPC/InstPrinter/*.c",
+        "lib/Target/PowerPC/InstPrinter/*.cpp",
+        "lib/Target/PowerPC/InstPrinter/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/InstPrinter/*.h",
+        "include/llvm/Target/PowerPC/InstPrinter/*.def",
+        "include/llvm/Target/PowerPC/InstPrinter/*.inc",
+        "lib/Target/PowerPC/InstPrinter/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":attributes_gen",
+        ":config",
+        ":intrinsics_gen",
+        ":mc",
+        ":powerpc_info",
+        ":powerpc_target_gen",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "powerpc_code_gen",
+    srcs = glob([
+        "lib/Target/PowerPC/*.c",
+        "lib/Target/PowerPC/*.cpp",
+        "lib/Target/PowerPC/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/*.h",
+        "include/llvm/Target/PowerPC/*.def",
+        "include/llvm/Target/PowerPC/*.inc",
+        "lib/Target/PowerPC/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":analysis",
+        ":asm_printer",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":mc",
+        ":powerpc_asm_printer",
+        ":powerpc_desc",
+        ":powerpc_info",
+        ":scalar",
+        ":selection_dag",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "powerpc_desc",
+    srcs = glob([
+        "lib/Target/PowerPC/MCTargetDesc/*.c",
+        "lib/Target/PowerPC/MCTargetDesc/*.cpp",
+        "lib/Target/PowerPC/MCTargetDesc/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/MCTargetDesc/*.h",
+        "include/llvm/Target/PowerPC/MCTargetDesc/*.def",
+        "include/llvm/Target/PowerPC/MCTargetDesc/*.inc",
+        "lib/Target/PowerPC/MCTargetDesc/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":attributes_gen",
+        ":config",
+        ":intrinsics_gen",
+        ":mc",
+        ":powerpc_asm_printer",
+        ":powerpc_info",
+        ":powerpc_target_gen",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "powerpc_disassembler",
+    srcs = glob([
+        "lib/Target/PowerPC/Disassembler/*.c",
+        "lib/Target/PowerPC/Disassembler/*.cpp",
+        "lib/Target/PowerPC/Disassembler/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/Disassembler/*.h",
+        "include/llvm/Target/PowerPC/Disassembler/*.def",
+        "include/llvm/Target/PowerPC/Disassembler/*.inc",
+        "lib/Target/PowerPC/Disassembler/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":config",
+        ":mc_disassembler",
+        ":powerpc_info",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "powerpc_info",
+    srcs = glob([
+        "lib/Target/PowerPC/TargetInfo/*.c",
+        "lib/Target/PowerPC/TargetInfo/*.cpp",
+        "lib/Target/PowerPC/TargetInfo/*.inc",
+        "lib/Target/PowerPC/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/PowerPC/TargetInfo/*.h",
+        "include/llvm/Target/PowerPC/TargetInfo/*.def",
+        "include/llvm/Target/PowerPC/TargetInfo/*.inc",
+        "lib/Target/PowerPC/PPC*.h",
+        "lib/Target/PowerPC/TargetInfo/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/PowerPC"],
+    deps = [
+        ":attributes_gen",
+        ":config",
+        ":core",
+        ":intrinsics_gen",
+        ":powerpc_target_gen",
+        ":support",
+        ":target",
+    ],
+)
+
+cc_library(
+    name = "profile_data",
+    srcs = glob([
+        "lib/ProfileData/*.c",
+        "lib/ProfileData/*.cpp",
+        "lib/ProfileData/*.inc",
+        "lib/ProfileData/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/ProfileData/*.h",
+        "include/llvm/ProfileData/*.def",
+        "include/llvm/ProfileData/*.inc",
+    ]),
+    deps = [
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "runtime_dyld",
+    srcs = glob([
+        "lib/ExecutionEngine/RuntimeDyld/*.c",
+        "lib/ExecutionEngine/RuntimeDyld/*.cpp",
+        "lib/ExecutionEngine/RuntimeDyld/*.inc",
+        "include/llvm/ExecutionEngine/JITSymbol.h",
+        "include/llvm/ExecutionEngine/RTDyldMemoryManager.h",
+        "lib/ExecutionEngine/RuntimeDyld/*.h",
+        "lib/ExecutionEngine/RuntimeDyld/Targets/*.h",
+        "lib/ExecutionEngine/RuntimeDyld/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/ExecutionEngine/RuntimeDyld/*.h",
+        "include/llvm/ExecutionEngine/RuntimeDyld/*.def",
+        "include/llvm/ExecutionEngine/RuntimeDyld/*.inc",
+        "include/llvm/DebugInfo/DIContext.h",
+        "include/llvm/ExecutionEngine/RTDyldMemoryManager.h",
+        "include/llvm/ExecutionEngine/RuntimeDyld*.h",
+    ]),
+    deps = [
+        ":config",
+        ":mc",
+        ":mc_disassembler",
+        ":object",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "scalar",
+    srcs = glob([
+        "lib/Transforms/Scalar/*.c",
+        "lib/Transforms/Scalar/*.cpp",
+        "lib/Transforms/Scalar/*.inc",
+        "include/llvm-c/Transforms/Scalar.h",
+        "include/llvm/Transforms/Scalar.h",
+        "include/llvm/Target/TargetMachine.h",
+        "lib/Transforms/Scalar/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/Scalar/*.h",
+        "include/llvm/Transforms/Scalar/*.def",
+        "include/llvm/Transforms/Scalar/*.inc",
+        "include/llvm/Transforms/IPO.h",
+        "include/llvm/Transforms/IPO/SCCP.h",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":inst_combine",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "selection_dag",
+    srcs = glob([
+        "lib/CodeGen/SelectionDAG/*.c",
+        "lib/CodeGen/SelectionDAG/*.cpp",
+        "lib/CodeGen/SelectionDAG/*.inc",
+        "lib/CodeGen/SelectionDAG/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/CodeGen/SelectionDAG/*.h",
+        "include/llvm/CodeGen/SelectionDAG/*.def",
+        "include/llvm/CodeGen/SelectionDAG/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":mc",
+        ":support",
+        ":target",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "support",
+    srcs = glob([
+        "lib/Support/*.c",
+        "lib/Support/*.cpp",
+        "lib/Support/*.inc",
+        "lib/Support/Unix/*.inc",
+        "lib/Support/Unix/*.h",
+        "include/llvm-c/*.h",
+        "lib/Support/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Support/*.h",
+        "include/llvm/Support/*.def",
+        "include/llvm/Support/*.inc",
+        "include/llvm/ADT/*.h",
+        "include/llvm/Support/ELFRelocs/*.def",
+    ]) + ["include/llvm/Support/DataTypes.h"],
+    deps = [
+        ":config",
+        ":demangle",
+    ],
+)
+
+cc_library(
+    name = "table_gen",
+    srcs = glob([
+        "lib/TableGen/*.c",
+        "lib/TableGen/*.cpp",
+        "lib/TableGen/*.inc",
+        "include/llvm/CodeGen/*.h",
+        "lib/TableGen/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/TableGen/*.h",
+        "include/llvm/TableGen/*.def",
+        "include/llvm/TableGen/*.inc",
+        "include/llvm/Target/*.def",
+    ]),
+    deps = [
+        ":config",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "target",
+    srcs = glob([
+        "lib/Target/*.c",
+        "lib/Target/*.cpp",
+        "lib/Target/*.inc",
+        "include/llvm/CodeGen/*.h",
+        "include/llvm-c/Initialization.h",
+        "include/llvm-c/Target.h",
+        "lib/Target/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/*.h",
+        "include/llvm/Target/*.def",
+        "include/llvm/Target/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":mc",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "transform_utils",
+    srcs = glob([
+        "lib/Transforms/Utils/*.c",
+        "lib/Transforms/Utils/*.cpp",
+        "lib/Transforms/Utils/*.inc",
+        "include/llvm/Transforms/IPO.h",
+        "include/llvm/Transforms/Scalar.h",
+        "lib/Transforms/Utils/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/Utils/*.h",
+        "include/llvm/Transforms/Utils/*.def",
+        "include/llvm/Transforms/Utils/*.inc",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
+cc_library(
+    name = "vectorize",
+    srcs = glob([
+        "lib/Transforms/Vectorize/*.c",
+        "lib/Transforms/Vectorize/*.cpp",
+        "lib/Transforms/Vectorize/*.inc",
+        "include/llvm-c/Transforms/Vectorize.h",
+        "lib/Transforms/Vectorize/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Transforms/Vectorize/*.h",
+        "include/llvm/Transforms/Vectorize/*.def",
+        "include/llvm/Transforms/Vectorize/*.inc",
+        "include/llvm/Transforms/Vectorize.h",
+    ]),
+    deps = [
+        ":analysis",
+        ":config",
+        ":core",
+        ":support",
+        ":transform_utils",
+    ],
+)
+
+cc_library(
+    name = "x86_asm_parser",
+    srcs = glob([
+        "lib/Target/X86/AsmParser/*.c",
+        "lib/Target/X86/AsmParser/*.cpp",
+        "lib/Target/X86/AsmParser/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/AsmParser/*.h",
+        "include/llvm/Target/X86/AsmParser/*.def",
+        "include/llvm/Target/X86/AsmParser/*.inc",
+        "lib/Target/X86/AsmParser/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":config",
+        ":mc",
+        ":mc_parser",
+        ":support",
+        ":x86_desc",
+        ":x86_info",
+    ],
+)
+
+cc_library(
+    name = "x86_asm_printer",
+    srcs = glob([
+        "lib/Target/X86/InstPrinter/*.c",
+        "lib/Target/X86/InstPrinter/*.cpp",
+        "lib/Target/X86/InstPrinter/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/InstPrinter/*.h",
+        "include/llvm/Target/X86/InstPrinter/*.def",
+        "include/llvm/Target/X86/InstPrinter/*.inc",
+        "lib/Target/X86/InstPrinter/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":config",
+        ":mc",
+        ":support",
+        ":x86_info",
+        ":x86_target_gen",
+        ":x86_utils",
+    ],
+)
+
+cc_library(
+    name = "x86_code_gen",
+    srcs = glob([
+        "lib/Target/X86/*.c",
+        "lib/Target/X86/*.cpp",
+        "lib/Target/X86/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/*.h",
+        "include/llvm/Target/X86/*.def",
+        "include/llvm/Target/X86/*.inc",
+        "lib/Target/X86/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":analysis",
+        ":asm_printer",
+        ":code_gen",
+        ":config",
+        ":core",
+        ":global_i_sel",
+        ":mc",
+        ":selection_dag",
+        ":support",
+        ":target",
+        ":x86_asm_printer",
+        ":x86_desc",
+        ":x86_info",
+        ":x86_utils",
+    ],
+)
+
+cc_library(
+    name = "x86_desc",
+    srcs = glob([
+        "lib/Target/X86/MCTargetDesc/*.c",
+        "lib/Target/X86/MCTargetDesc/*.cpp",
+        "lib/Target/X86/MCTargetDesc/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/MCTargetDesc/*.h",
+        "include/llvm/Target/X86/MCTargetDesc/*.def",
+        "include/llvm/Target/X86/MCTargetDesc/*.inc",
+        "lib/Target/X86/MCTargetDesc/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":config",
+        ":mc",
+        ":mc_disassembler",
+        ":object",
+        ":support",
+        ":x86_asm_printer",
+        ":x86_info",
+    ],
+)
+
+cc_library(
+    name = "x86_disassembler",
+    srcs = glob([
+        "lib/Target/X86/Disassembler/*.c",
+        "lib/Target/X86/Disassembler/*.cpp",
+        "lib/Target/X86/Disassembler/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/Disassembler/*.h",
+        "include/llvm/Target/X86/Disassembler/*.def",
+        "include/llvm/Target/X86/Disassembler/*.inc",
+        "lib/Target/X86/Disassembler/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":config",
+        ":mc_disassembler",
+        ":support",
+        ":x86_info",
+    ],
+)
+
+cc_library(
+    name = "x86_info",
+    srcs = glob([
+        "lib/Target/X86/TargetInfo/*.c",
+        "lib/Target/X86/TargetInfo/*.cpp",
+        "lib/Target/X86/TargetInfo/*.inc",
+        "lib/Target/X86/MCTargetDesc/*.h",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/TargetInfo/*.h",
+        "include/llvm/Target/X86/TargetInfo/*.def",
+        "include/llvm/Target/X86/TargetInfo/*.inc",
+        "lib/Target/X86/TargetInfo/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":config",
+        ":mc",
+        ":support",
+        ":x86_target_gen",
+    ],
+)
+
+cc_library(
+    name = "x86_utils",
+    srcs = glob([
+        "lib/Target/X86/Utils/*.c",
+        "lib/Target/X86/Utils/*.cpp",
+        "lib/Target/X86/Utils/*.inc",
+    ]),
+    hdrs = glob([
+        "include/llvm/Target/X86/Utils/*.h",
+        "include/llvm/Target/X86/Utils/*.def",
+        "include/llvm/Target/X86/Utils/*.inc",
+        "lib/Target/X86/Utils/*.h",
+    ]),
+    copts = ["-Iexternal/llvm/lib/Target/X86"],
+    deps = [
+        ":code_gen",
+        ":config",
+        ":core",
+        ":support",
+    ],
+)
+
diff --git a/third_party/llvm/llvm.bzl b/third_party/llvm/llvm.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..1d6bf1c7065a7c4734c9723b9c9e8b1c1439a737
--- /dev/null
+++ b/third_party/llvm/llvm.bzl
@@ -0,0 +1,149 @@
+"""This file contains BUILD extensions for generating source code from LLVM's table definition files using the TableGen tool.
+
+See http://llvm.org/cmds/tblgen.html for more information on the TableGen
+tool.
+TODO(chandlerc): Currently this expresses include-based dependencies as
+"sources", and has no transitive understanding due to these files not being
+correctly understood by the build system.
+"""
+
+def gentbl(name, tblgen, td_file, td_srcs, tbl_outs, library = True, **kwargs):
+  """gentbl() generates tabular code from a table definition file.
+
+  Args:
+    name: The name of the build rule for use in dependencies.
+    tblgen: The binary used to produce the output.
+    td_file: The primary table definitions file.
+    td_srcs: A list of table definition files included transitively.
+    tbl_outs: A list of tuples (opts, out), where each opts is a string of
+      options passed to tblgen, and the out is the corresponding output file
+      produced.
+    library: Whether to bundle the generated files into a library.
+    **kwargs: Keyword arguments to pass to subsidiary cc_library() rule.
+  """
+  if td_file not in td_srcs:
+    td_srcs += [td_file]
+  includes = []
+  for (opts, out) in tbl_outs:
+    outdir = out[:out.rindex("/")]
+    if outdir not in includes:
+      includes.append(outdir)
+    rule_suffix = "_".join(opts.replace("-", "_").replace("=", "_").split(" "))
+    native.genrule(
+        name="%s_%s_genrule" % (name, rule_suffix),
+        srcs=td_srcs,
+        outs=[out],
+        tools=[tblgen],
+        message="Generating code from table: %s" % td_file,
+        cmd=(("$(location %s) " + "-I external/llvm/include " +
+              "-I external/llvm/tools/clang/include " +
+              "-I $$(dirname $(location %s)) " + "%s $(location %s) -o $@") % (
+                  tblgen, td_file, opts, td_file)))
+  # For now, all generated files can be assumed to comprise public interfaces.
+  # If this is not true, you should specify library = False
+  # and list the generated '.inc' files in "srcs".
+  if library:
+    native.cc_library(name=name, textual_hdrs=[f for (_, f) in tbl_outs],
+                      includes=includes,  **kwargs)
+
+
+# Rule for simple expansion of template files. This performs a simple
+# search over the template file for the keys in substitutions,
+# and replaces them with the corresponding values.
+#
+# Typical usage:
+#   load("/tools/build_rules/expand_header_template", "expand_header_template")
+#   expand_header_template(
+#       name = "ExpandMyTemplate",
+#       template = "my.template",
+#       out = "my.txt",
+#       substitutions = {
+#         "$VAR1": "foo",
+#         "$VAR2": "bar",
+#       }
+#   )
+#
+# Args:
+#   name: The name of the rule.
+#   template: The template file to expand
+#   out: The destination of the expanded file
+#   substitutions: A dictionary mapping strings to their substitutions
+
+def expand_header_template_impl(ctx):
+  ctx.template_action(
+      template = ctx.file.template,
+      output = ctx.outputs.out,
+      substitutions = ctx.attr.substitutions,
+  )
+
+expand_header_template = rule(
+    implementation = expand_header_template_impl,
+    attrs = {
+        "template": attr.label(mandatory=True, allow_files=True, single_file=True),
+        "substitutions": attr.string_dict(mandatory=True),
+        "out": attr.output(mandatory=True),
+    },
+    # output_to_genfiles is required for header files.
+    output_to_genfiles = True,
+)
+
+
+def llvm_target_cmake_vars(native_arch, target_triple):
+  return {
+      "LLVM_HOST_TRIPLE": target_triple,
+      "LLVM_DEFAULT_TARGET_TRIPLE": target_triple,
+      "LLVM_NATIVE_ARCH": native_arch,
+  }
+
+def _quote(s):
+  """Quotes the given string for use in a shell command.
+
+  This function double-quotes the given string (in case it contains spaces or
+  other special characters) and escapes any special characters (dollar signs,
+  double-quotes, and backslashes) that may be present.
+
+  Args:
+    s: The string to quote.
+  Returns:
+    An escaped and quoted version of the string that can be passed to a shell
+    command.
+  """
+  return ('"' +
+          s.replace("\\", "\\\\").replace("$", "\\$").replace('"', '\\"') +
+          '"')
+
+def cmake_var_string(cmake_vars):
+  """Converts a dictionary to an input suitable for expand_cmake_vars.
+
+  Ideally we would jist stringify in the expand_cmake_vars() rule, but select()
+  interacts badly with genrules.
+
+  TODO(phawkins): replace the genrule() with native rule and delete this rule.
+
+  Args:
+    cmake_vars: a dictionary with string keys and values that are convertable to
+      strings.
+  """
+  return " ".join([_quote("{}={}".format(k, str(v)))
+                   for (k, v) in cmake_vars.items()])
+
+def expand_cmake_vars(name, src, dst, cmake_vars):
+  """Expands #cmakedefine, #cmakedefine01, and CMake variables in a text file.
+
+  Args:
+    name: the name of the rule
+    src: the input of the rule
+    dst: the output of the rule
+    cmake_vars: a string containing the CMake variables, as generated by
+      cmake_var_string.
+  """
+  expand_cmake_vars_tool = "@//third_party/llvm:expand_cmake_vars"
+  native.genrule(
+      name = name,
+      srcs = [src],
+      tools = [expand_cmake_vars_tool],
+      outs = [dst],
+      cmd = ("$(location {}) ".format(expand_cmake_vars_tool) + cmake_vars +
+             "< $< > $@")
+  )
+