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"""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 $@") % (
tblgen, td_file, opts, td_file)))
# For now, all generated files can be assumed to comprise public interfaces.
# If this is not true, you should specify library = False
# and list the generated '.inc' files in "srcs".
if library:
native.cc_library(name=name, textual_hdrs=[f for (_, f) in tbl_outs],
includes=includes, **kwargs)
def llvm_target_cmake_vars(native_arch, target_triple):
return {
"LLVM_HOST_TRIPLE": target_triple,
"LLVM_DEFAULT_TARGET_TRIPLE": target_triple,
"LLVM_NATIVE_ARCH": native_arch,
}
def _quote(s):
"""Quotes the given string for use in a shell command.
This function double-quotes the given string (in case it contains spaces or
other special characters) and escapes any special characters (dollar signs,
double-quotes, and backslashes) that may be present.
Args:
s: The string to quote.
Returns:
An escaped and quoted version of the string that can be passed to a shell
command.
"""
return ('"' +
s.replace("\\", "\\\\").replace("$", "\\$").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 = Label("@org_tensorflow//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 +
"< $< > $@")
)
# 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,
"BACKTRACE_HEADER": "execinfo.h",
"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_DISABLE_ABI_BREAKING_CHECKS_ENFORCING": 0,
"LLVM_ENABLE_ABI_BREAKING_CHECKS": 0,
"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.
llvm_all_cmake_vars = select({
"@org_tensorflow//tensorflow:darwin": cmake_var_string(
cmake_vars + llvm_target_cmake_vars("X86", "x86_64-apple-darwin") +
darwin_cmake_vars),
"@org_tensorflow//tensorflow:linux_ppc64le": cmake_var_string(
cmake_vars +
llvm_target_cmake_vars("PowerPC", "powerpc64le-unknown-linux_gnu") +
linux_cmake_vars,
),
"//conditions:default": cmake_var_string(
cmake_vars +
llvm_target_cmake_vars("X86", "x86_64-unknown-linux_gnu") +
linux_cmake_vars),
})
llvm_linkopts = ["-ldl", "-lm", "-lpthread"]
llvm_defines = [
"LLVM_ENABLE_STATS",
"__STDC_LIMIT_MACROS",
"__STDC_CONSTANT_MACROS",
"__STDC_FORMAT_MACROS",
"_DEBUG",
"LLVM_BUILD_GLOBAL_ISEL",
]
llvm_copts = []
# Platform specific sources for libSupport.
llvm_support_platform_specific_srcs_glob = [
"lib/Support/Unix/*.inc",
"lib/Support/Unix/*.h",
]
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