Currently, the Bazel build uses static, checked in [llvm-]config.h files
in combination with global macro definitions to mimic CMake's generated
headers. This change reuses the write_cmake_config.py script from the GN
build to generate the headers from source in the same way. The purpose
is to ensure that the Bazel build stays up to date with any changes to
the CMake config files. The write_cmake_config.py script has good error
checking to ensure that unneeded, stale variables are not passed, and
that any missing variables are reported as errors.
I tried to closely follow the logic in the GN build here:
llvm/utils/gn/secondary/llvm/include/Config/BUILD.gn
The duplication between this file and config.bzl is significant, and we
could consider going further, but I'd like to hold off on it for now.
The GN build changes are to move the write_cmake_config.py script up to
//llvm/utils/write_cmake_config.py, and update the paths accordingly.
The next logical change is to generate Clang's config.h header.
Differential Revision: https://reviews.llvm.org/D126581
While executing the test suite for Tensorflow(v2.8.0), we encountered multiple TC failures with the below error
```
'z14' is not a recognized processor for this target
```
This patch adds the s390x target to the build target list. It fixes TC failures in multiple modules of Tensorflow on s390x arch. It is also tested to have no effect on x86 machines.
Reviewed By: GMNGeoffrey
Differential Revision: https://reviews.llvm.org/D125096
This reverts 3816c53f04 and removes follow-up
fixups.
The original intention was to show error earlier (posix_fallocate time) than
later for ld.lld but it appears to cause some problems which make it not free.
* FreeBSD ZFS: EINVAL, not too bad.
* FreeBSD UFS: according to khng "devastatingly slow on freebsd because UFS on freebsd does not have preallocation support like illumos. It zero-fills."
* NetBSD: maybe EOPNOTSUPP
* Linux tmpfs: unless tmpfs is set up to use huge pages (requires CONFIG_TRANSPARENT_HUGE_PAGECACHE=y), I can consistently demonstrate ~300ms delay for a 1.4GiB output.
* Linux ext4: I don't measure any benefit, either backed by a hard disk or by a file in tmpfs.
* The current code organization of `defined(HAVE_POSIX_FALLOCATE)` costs us a macro dispatch for AIX.
I think we should just remove it. I think if posix_fallocate ever finds demonstrable benefit,
it is likely Linux specific and will not need HAVE_POSIX_FALLOCATE, and possibly opt-in by some specific programs.
In a filesystem with CoW and compression, the ENOSPC benefit may be lost as well.
Reviewed By: khng300
Differential Revision: https://reviews.llvm.org/D115957
This cmake configure option was added in
df0ba47c36, and was ported to
Bazel in 7d323dc773.
However, the setting chosen in Bazel seems accidental, not necessarily
intentional.
LLVM_WINDOWS_PREFER_FORWARD_SLASH has no effect on Unix, and on
Windows, setting it to 0 is the default, which gets the same behaviour
as before. Setting it to 1 enables new experimental behaviours
(which is enabled by default on MinGW targets only).
As I don't see any explicit intent to opt in to the new experimental
behaviour, I believe the current configuration in bazel was a
mistake.
Differential Revision: https://reviews.llvm.org/D114065
This required substantially more invasive changes.
We need to handle some of the LLVM `config.h` changes differently from
the old pattern. These aren't always safe on the commandline, and the
Windows ones specifically break Clang. Instead, use conditional defines
in the header itself. This more closely matches how CMake builds see the
definitions. I think this is also just cleaner and we should maybe move
more of the macros out of Bazel.
The config defines for Windows that I've kept in Bazel are the ones that
LLVM's CMake does at the commandline as well. I've also added numerous
ones that CMake uses and we didn't replicate in Bazel.
I also needed a different approach to get `libclang` working well. This,
IMO, improves things on all platforms. Now we build the plugin and
actually wrap it back up with `cc_import`. We have to use a collection
of manually tagged `cc_binary` rules to get the naming to work out the
right way, but this isn't too different from the prior approach. By
directly having a `cc_binary` rule for each platform spelling of
`libclang`, we can actually extract the interface library from it and
correctly depend on it with `cc_import`. I think the result now is much
closer to the intent and to the CMake build for libclang.
Sadly, some tests also needed disabling. This is actually narrower than
what CMake does. The issue isn't indicative of anything serious -- the
test just assumes Unix-style paths.
I also have cleaned up the Windows flags in `.bazelrc` to much more
closely match what CMake does.
Differential Revision: https://reviews.llvm.org/D112399
Adds basic `--config=clang-cl` to set up the basic options needed, and
then fix a number of issues that surface in Windows builds for me.
With these fixes, `//llvm/...` builds cleanly. One unittest still fails,
but its just due to running out of stack space due to creating a large
number of short-lived stack variables. The test should probably be
decomposed into a set of tests (`LegalizerInfoTest::RuleSets`), but that
seemed like too invasive of a change here and with everything building
cleanly this isn't disrupting me experimenting with Windows builds.
Some parts of `//clang/...` builds, but that will require more work.
In attempting to build JAX on Apple Silicon, we discovered an issue with
the bazel configuration in llvm-project-overlay. This patch fixes the
logic, at least when building JAX. More context is included on the
following GitHub issue: https://github.com/google/jax/issues/5501
Differential Revision: https://reviews.llvm.org/D109839
Presently, definitions default to those for Linux which are not defined for FreeBSD (HAVE_LSEEK64, HAVE_MALLINFO, etc.). Patch sets os_defines to posix definitions under FreeBSD.
Reviewed By: GMNGeoffrey
Differential Revision: https://reviews.llvm.org/D109913
There's a lot of unnecessary backslashes here that we can avoid to
reduce confusion.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D108495
These are unconditionally included in the CMake build as well and
necessary for some odd platforms (even though the C++11 standard says
they shouldn't be).
Reviewed By: chandlerc
Differential Revision: https://reviews.llvm.org/D107123
This adds Bazel configuration for the TargetMCA targets, which currently
only includes AMDGPU.
Reviewed By: rnk
Differential Revision: https://reviews.llvm.org/D106996
Reid Kleckner