Commit Graph

89 Commits

Author SHA1 Message Date
Mehdi Amini 772f7b87f8 Disable the MLIR ExecutionEngine library when the native target is not configured
The execution engine would not be functional anyway, we're already
disabling the tests, this also disable the rest of the code.

Anecdotally this reduces the number of static library built when the
builtin target is disabled goes from 236 to 218.

Here is the complete list of LLVM targets built when running
`ninja check-mlir`:

libLLVMAggressiveInstCombine.a
libLLVMAnalysis.a
libLLVMAsmParser.a
libLLVMBinaryFormat.a
libLLVMBitReader.a
libLLVMBitstreamReader.a
libLLVMBitWriter.a
libLLVMCore.a
libLLVMDebugInfoCodeView.a
libLLVMDebugInfoDWARF.a
libLLVMDemangle.a
libLLVMFileCheck.a
libLLVMFrontendOpenMP.a
libLLVMInstCombine.a
libLLVMIRReader.a
libLLVMMC.a
libLLVMMCParser.a
libLLVMObject.a
libLLVMProfileData.a
libLLVMRemarks.a
libLLVMScalarOpts.a
libLLVMSupport.a
libLLVMTableGen.a
libLLVMTableGenGlobalISel.a
libLLVMTextAPI.a
libLLVMTransformUtils.a

Differential Revision: https://reviews.llvm.org/D117287
2022-01-15 19:36:27 +00:00
Mehdi Amini 8d20d83dd7 Fix a comment in CMake (NFC) 2022-01-14 07:33:06 +00:00
Mehdi Amini 46b1e83716 Do not build llc and mlir-cpu-runner to run MLIR tests with the native target isn't configured (NFC)
The relevant tests are already disabled in this case.
2022-01-14 07:30:34 +00:00
Mehdi Amini 5a68a85d85 Mark some MLIR tests as requiring the native target to be configured
This makes `ninja check-mlir` work without the host targets configured.
2022-01-14 07:23:14 +00:00
Denys Shabalin a8a2ee6331 [mlir] Introduce C API for PDL dialect types
This change introduces C API helper functions to work with PDL types.
Modification closely follow the format of the https://reviews.llvm.org/D116546.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D117221
2022-01-13 15:29:01 +01:00
Mehdi Amini 9dc4dea110 Add llc to the list of build dependencies to test MLIR (Fix buildbot) 2022-01-12 20:55:52 +00:00
Mehdi Amini 453a056df6 Add split-file to the MLIR test dependencies (Fix bot) 2022-01-12 20:33:52 +00:00
Alex Zinenko 9bcf13bf3e [mlir] Introduce C API for the Quantization dialect types
Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D116546
2022-01-05 16:20:29 +01:00
River Riddle 11d26bd143 [mlir][PDLL] Add an initial frontend for PDLL
This is a new pattern rewrite frontend designed from the ground
up to support MLIR constructs, and to target PDL. This frontend
language was proposed in https://llvm.discourse.group/t/rfc-pdll-a-new-declarative-rewrite-frontend-for-mlir/4798

This commit starts sketching out the base structure of the
frontend, and is intended to be a minimal starting point for
building up the language. It essentially contains support for
defining a pattern, variables, and erasing an operation. The
features mentioned in the proposal RFC (including IDE support)
will be added incrementally in followup commits.

I intend to upstream the documentation for the language in a
followup when a bit more of the pieces have been landed.

Differential Revision: https://reviews.llvm.org/D115093
2021-12-16 02:08:12 +00:00
Bixia Zheng 02710413a3 Accept symmetric sparse matrix in Matrix Market Exchange Format.
Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D114402
2021-11-23 19:53:17 -08:00
Stella Laurenzo d86688fb1f [mlir][python] Segment MLIR Python test dialect to avoid testonly dependency.
With https://reviews.llvm.org/rG14c9207063bb00823a5126131e50c93f6e288bd3, the build is broken with -DMLIR_INCLUDE_TESTS=OFF. This patch fixes the build and we may want to do a better fix to the layering in a followup.

Differential Revision: https://reviews.llvm.org/D112560
2021-10-26 18:47:36 +00:00
Alex Zinenko 14c9207063 [mlir] support interfaces in Python bindings
Introduce the initial support for operation interfaces in C API and Python
bindings. Interfaces are a key component of MLIR's extensibility and should be
available in bindings to make use of full potential of MLIR.

This initial implementation exposes InferTypeOpInterface all the way to the
Python bindings since it can be later used to simplify the operation
construction methods by inferring their return types instead of requiring the
user to do so. The general infrastructure for binding interfaces is defined and
InferTypeOpInterface can be used as an example for binding other interfaces.

Reviewed By: gysit

Differential Revision: https://reviews.llvm.org/D111656
2021-10-25 12:50:42 +02:00
Vladislav Vinogradov 505afd1e64 [mlir] Clean up boolean flags usage in LIT tests
* Call `llvm_canonicalize_cmake_booleans` for all CMake options,
  which are propagated to `lit.local.cfg` files.
* Use Python native boolean values instead of strings for such options.

This fixes the cases, when CMake variables have values other than `ON` (like `TRUE`).
This might happen due to IDE integration or due to CMake preset usage.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D110073
2021-10-12 11:44:48 +03:00
Mehdi Amini a1d1c31746 Add a `check-mlir-build-only` build target that only builds the dependencies of the `check-mlir` test target (NFC) 2021-10-02 04:06:17 +00:00
Stella Laurenzo 267bb194f3 [mlir] Remove old "tc" linalg ods generator.
* This could have been removed some time ago as it only had one op left in it, which is redundant with the new approach.
* `matmul_i8_i8_i32` (the remaining op) can be trivially replaced by `matmul`, which natively supports mixed precision.

Differential Revision: https://reviews.llvm.org/D110792
2021-09-30 16:30:06 +00:00
Stella Laurenzo 310c9496d8 Re-engineer MLIR python build support.
* Implements all of the discussed features:
  - Links against common CAPI libraries that are self contained.
  - Stops using the 'python/' directory at the root for everything, opening the namespace up for multiple projects to embed the MLIR python API.
  - Separates declaration of sources (py and C++) needed to build the extension from building, allowing external projects to build custom assemblies from core parts of the API.
  - Makes the core python API relocatable (i.e. it could be embedded as something like 'npcomp.ir', 'npcomp.dialects', etc). Still a bit more to do to make it truly isolated but the main structural reset is done.
  - When building statically, installed python packages are completely self contained, suitable for direct setup and upload to PyPi, et al.
  - Lets external projects assemble their own CAPI common runtime library that all extensions use. No more possibilities for TypeID issues.
  - Begins modularizing the API so that external projects that just include a piece pay only for what they use.
* I also rolled in a re-organization of the native libraries that matches how I was packaging these out of tree and is a better layering (i.e. all libraries go into a nested _mlir_libs package). There is some further cleanup that I resisted since it would have required source changes that I'd rather do in a followup once everything stabilizes.
* Note that I made a somewhat odd choice in choosing to recompile all extensions for each project they are included into (as opposed to compiling once and just linking). While not leveraged yet, this will let us set definitions controlling the namespacing of the extensions so that they can be made to not conflict across projects (with preprocessor definitions).
* This will be a relatively substantial breaking change for downstreams. I will handle the npcomp migration and will coordinate with the circt folks before landing. We should stage this and make sure it isn't causing problems before landing.
* Fixed a couple of absolute imports that were causing issues.

Differential Revision: https://reviews.llvm.org/D106520
2021-07-27 15:54:58 +00:00
Mehdi Amini 68ec4aa63b Add `lli` as dependency of MLIR integration tests
This fixes running `ninja check-mlir` from a clean build when
the integration tests are enabled.
2021-07-16 21:10:28 +00:00
Adam Paszke 35d4593e6b Add C API files for the LLVM dialect
For now only expose a builder for the LLVM pointer type.

Reviewed By: jpienaar, ftynse

Differential Revision: https://reviews.llvm.org/D105346
2021-07-02 11:55:44 -07:00
Alex Zinenko 355216380b [mlir] Remove SDBM
This data structure and algorithm collection is no longer in use.

Reviewed By: bondhugula

Differential Revision: https://reviews.llvm.org/D105102
2021-06-29 14:46:26 +02:00
Gus Smith 22911585bb [mlir][sparse] Add Matricized Tensor Times Khatri-Rao Product (MTTKRP) integration test
See this documentation from taco:
http://tensor-compiler.org/docs/data_analytics/index.html

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D104417
2021-06-17 16:53:12 +00:00
Aart Bik ec8910c4ad [mlir][sparse] integration test for all-dense annotated "sparse" output
Reviewed By: gussmith23

Differential Revision: https://reviews.llvm.org/D104277
2021-06-15 15:44:11 -07:00
Krzysztof Drewniak b532455ac7 [MLIR] Fix Standalone dialect test to work in out-of-tree builds
When LLVM and MLIR are built as subprojects (via add_subdirectory),
the CMake configuration that indicates where the MLIR libraries are is
not necessarily in the same cmake/ directory as LLVM's configuration.
This patch removes that assumption about where MLIRConfig.cmake is
located.

(As an additional none, the %llvm_lib_dir substitution was never
defined, and so find_package(MLIR) in the build was succeeding for
other reasons.)

Reviewed By: stephenneuendorffer

Differential Revision: https://reviews.llvm.org/D103276
2021-06-02 17:24:46 +00:00
Uday Bondhugula 9c21ddb70a [MLIR] Make MLIR cmake variable names consistent
Fix inconsistent MLIR CMake variable names. Consistently name them as
MLIR_ENABLE_<feature>.

Eg: MLIR_CUDA_RUNNER_ENABLED -> MLIR_ENABLE_CUDA_RUNNER

MLIR follows (or has mostly followed) the convention of naming
cmake enabling variables in the from MLIR_ENABLE_... etc. Using a
convention here is easy and also important for convenience. A counter
pattern was started with variables named MLIR_..._ENABLED. This led to a
sequence of related counter patterns: MLIR_CUDA_RUNNER_ENABLED,
MLIR_ROCM_RUNNER_ENABLED, etc.. From a naming standpoint, the imperative
form is more meaningful. Additional discussion at:
https://llvm.discourse.group/t/mlir-cmake-enable-variable-naming-convention/3520

Switch all inconsistent ones to the ENABLE form. Keep the couple of old
mappings needed until buildbot config is migrated.

Differential Revision: https://reviews.llvm.org/D102976
2021-05-24 08:43:10 +05:30
Navdeep Kumar e552fa28da [MLIR][GPU] Add CUDA Tensor core WMMA test
Add a test case to test the complete execution of WMMA ops on a Nvidia
GPU with tensor cores. These tests are enabled under
MLIR_RUN_CUDA_TENSOR_CORE_TESTS.

Reviewed By: bondhugula

Differential Revision: https://reviews.llvm.org/D95334
2021-05-22 16:19:36 +05:30
Tobias Gysi 9a2769db80 [mir][Python][linalg] Support OpDSL extensions in C++.
The patch extends the yaml code generation to support the following new OpDSL constructs:
- captures
- constants
- iteration index accesses
- predefined types
These changes have been introduced by revision
https://reviews.llvm.org/D101364.

Differential Revision: https://reviews.llvm.org/D102075
2021-05-19 13:36:56 +00:00
Nicolas Vasilache 6825bfe23e [mlir][Vector] NFC - Drop vector EDSC usage
Drop the vector dialect EDSC subdirectory and update all uses.
2021-05-19 12:44:38 +00:00
Stella Laurenzo bcfa7baec8 [mlir][CAPI] Add CAPI bindings for the sparse_tensor dialect.
* Adds dialect registration, hand coded 'encoding' attribute and test.
* An MLIR CAPI tablegen backend for attributes does not exist, and this is a relatively complicated case. I opted to hand code it in a canonical way for now, which will provide a reasonable blueprint for building out the tablegen version in the future.
* Also added a (local) CMake function for declaring new CAPI tests, since it was getting repetitive/buggy.

Differential Revision: https://reviews.llvm.org/D102141
2021-05-10 16:54:56 +00:00
Stella Laurenzo 9f3f6d7bd8 Move MLIR python sources to mlir/python.
* NFC but has some fixes for CMake glitches discovered along the way (things not cleaning properly, co-mingled depends).
* Includes previously unsubmitted fix in D98681 and a TODO to fix it more appropriately in a smaller followup.

Differential Revision: https://reviews.llvm.org/D101493
2021-05-03 18:36:48 +00:00
River Riddle 751c14fc42 [mlir][mlir-lsp] Add a new C++ LSP server for MLIR named mlir-lsp-server
This commits adds a basic LSP server for MLIR that supports resolving references and definitions. Several components of the setup are simplified to keep the size of this commit down, and will be built out in later commits. A followup commit will add a vscode language client that communicates with this server, paving the way for better IDE experience when interfacing with MLIR files.

The structure of this tool is similar to mlir-opt and mlir-translate, i.e. the implementation is structured as a library that users can call into to implement entry points that contain the dialects/passes that they are interested in.

Note: This commit contains several files, namely those in `mlir-lsp-server/lsp`, that have been copied from the LSP code in clangd and adapted for use in MLIR. This copying was decided as the best initial path forward (discussed offline by several stake holders in MLIR and clangd) given the different needs of our MLIR server, and the one for clangd. If a strong desire/need for unification arises in the future, the existence of these files in mlir-lsp-server can be reconsidered.

Differential Revision: https://reviews.llvm.org/D100439
2021-04-21 14:44:37 -07:00
Emilio Cota 8508a63b88 [mlir] Rename AVX512 dialect to X86Vector
We will soon be adding non-AVX512 operations to MLIR, such as AVX's rsqrt. In https://reviews.llvm.org/D99818 several possibilities were discussed, namely to (1) add non-AVX512 ops to the AVX512 dialect, (2) add more dialects (e.g. AVX dialect for AVX rsqrt), and (3) expand the scope of the AVX512 to include these SIMD x86 ops, thereby renaming the dialect to something more accurate such as X86Vector.

Consensus was reached on option (3), which this patch implements.

Reviewed By: aartbik, ftynse, nicolasvasilache

Differential Revision: https://reviews.llvm.org/D100119
2021-04-12 19:20:04 +02:00
Aart Bik a0c5b7e3b5 [mlir][sparse] support for very narrow index and pointer types
Rationale:
Small indices and values, when allowed by the required range of the
input tensors, can reduce the memory footprint of sparse tensors
even more. Note, however, that we must be careful zero extending
the values (since sparse tensors never use negatives for indexing),
but LLVM treats the index type as signed in most memory operations
(like the scatter and gather). This CL dots all the i's in this regard.

Reviewed By: bixia

Differential Revision: https://reviews.llvm.org/D99777
2021-04-01 18:21:27 -07:00
Christian Sigg a825fb2c07 [mlir] Remove mlir-rocm-runner
This change combines for ROCm what was done for CUDA in D97463, D98203, D98360, and D98396.

I did not try to compile SerializeToHsaco.cpp or test mlir/test/Integration/GPU/ROCM because I don't have an AMD card. I fixed the things that had obvious bit-rot though.

Reviewed By: whchung

Differential Revision: https://reviews.llvm.org/D98447
2021-03-19 00:24:10 -07:00
Aart Bik 6ad7b97e20 [mlir][amx] Add Intel AMX dialect (architectural-specific vector dialect)
The Intel Advanced Matrix Extensions (AMX) provides a tile matrix
multiply unit (TMUL), a tile control register (TILECFG), and eight
tile registers TMM0 through TMM7 (TILEDATA). This new MLIR dialect
provides a bridge between MLIR concepts like vectors and memrefs
and the lower level LLVM IR details of AMX.

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D98470
2021-03-15 17:59:05 -07:00
Christian Sigg 1ef544d4a9 [mlir] Remove mlir-cuda-runner
Change CUDA integration tests to use mlir-opt + mlir-cpu-runner instead.

Depends On D98203

Reviewed By: herhut

Differential Revision: https://reviews.llvm.org/D98396
2021-03-12 14:06:43 +01:00
Mehdi Amini 13cb431719 Add basic JIT Python Bindings
This offers the ability to create a JIT and invoke a function by passing
ctypes pointers to the argument and the result.

Differential Revision: https://reviews.llvm.org/D97523
2021-03-03 18:19:40 +00:00
Mehdi Amini 86c8a7857d Add C bindings for mlir::ExecutionEngine
This adds minimalistic bindings for the execution engine, allowing to
invoke the JIT from the C API. This is still quite early and
experimental and shouldn't be considered stable in any way.

Differential Revision: https://reviews.llvm.org/D96651
2021-03-03 18:19:40 +00:00
Christian Sigg 9d7be77bf9 [mlir] Move cuda tests
Move test inputs to test/Integration directory.
Move runtime wrappers to ExecutionEngine.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D97463
2021-03-03 13:16:51 +01:00
Mehdi Amini 99b0032ce0 Move the MLIR integration tests as a subdirectory of test (NFC)
This does not change the behavior directly: the tests only run when
`-DMLIR_INCLUDE_INTEGRATION_TESTS=ON` is configured. However running
`ninja check-mlir` will not run all the tests within a single
lit invocation. The previous behavior would wait for all the integration
tests to complete before starting to run the first regular test. The
test results were also reported separately. This change is unifying all
of this and allow concurrent execution of the integration tests with
regular non-regression and unit-tests.

Differential Revision: https://reviews.llvm.org/D97241
2021-02-23 05:55:47 +00:00
Mehdi Amini 09cfec6243 Fix CMake configuration for MLIR unittests
The CMake changes in 2aa1af9b1d to make it possible to build MLIR as a
standalone project unfortunately disabled all unit-tests from the
regular in-tree build.
2021-02-11 01:17:49 +00:00
Michał Górny 2aa1af9b1d [MLIR] [CMake] Support building MLIR standalone
Add the necessary bits to CMakeLists to make it possible to configure
MLIR against installed LLVM, and build it with minimal need for LLVM
source tree.  The latter is only necessary to run unittests, and if it
is missing then unittests are skipped with a warning.

This change includes the necessary changes to tests, in particular
adding some missing substitutions and defining missing variables
for lit.site.cfg.py substitution.

Reviewed By: stephenneuendorffer

Differential Revision: https://reviews.llvm.org/D85464

Co-authored-by: Isuru Fernando <isuruf@gmail.com>
2021-02-02 13:10:21 -06:00
Nicolas Vasilache d0c9fb1b8e [mlir][Linalg] Improve codegen strategy
This revision improves the usage of the codegen strategy by adding a few flags that
make it easier to control for the CLI.
Usage of ModuleOp is replaced by FuncOp as this created issues in multi-threaded mode.

A simple benchmarking capability is added for linalg.matmul as well as linalg.matmul_column_major.
This latter op is also added to linalg.

Now obsolete linalg integration tests that also take too long are deleted.

Correctness checks are still missing at this point.

Differential revision: https://reviews.llvm.org/D95531
2021-01-28 10:59:16 +00:00
Vladislav Vinogradov 9667d15e74 [mlir] Fix for LIT tests
Add `MLIR_SPIRV_CPU_RUNNER_ENABLED` to `llvm_canonicalize_cmake_booleans`.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D94407
2021-01-12 17:07:23 +01:00
Alex Zinenko 029e199dbf [mlir] Make attributes mutable in Python bindings
Attributes represent additional data about an operation and are intended to be
modifiable during the lifetime of the operation. In the dialect-specific Python
bindings, attributes are exposed as properties on the operation class. Allow
for assigning values to these properties. Also support creating new and
deleting existing attributes through the generic "attributes" property of an
operation. Any validity checking must be performed by the op verifier after the
mutation, similarly to C++. Operations are not invalidated in the process: no
dangling pointers can be created as all attributes are owned by the context and
will remain live even if they are not used in any operation.

Introduce a Python Test dialect by analogy with the Test dialect and to avoid
polluting the latter with Python-specific constructs. Use this dialect to
implement a test for the attribute access and mutation API.

Reviewed By: stellaraccident, mehdi_amini

Differential Revision: https://reviews.llvm.org/D91652
2020-11-24 09:16:25 +01:00
Mehdi Amini dc43f78565 Add basic Python bindings for the PassManager and bind libTransforms
This only exposes the ability to round-trip a textual pipeline at the
moment.
To exercise it, we also bind the libTransforms in a new Python extension. This
does not include any interesting bindings, but it includes all the
mechanism to add separate native extensions and load them dynamically.
As such passes in libTransforms are only registered after `import
mlir.transforms`.
To support this global registration, the TableGen backend is also
extended to bind to the C API the group registration for passes.

Reviewed By: stellaraccident

Differential Revision: https://reviews.llvm.org/D90819
2020-11-10 19:55:21 +00:00
Mehdi Amini f61d1028fa Add a basic C API for the MLIR PassManager as well as a basic TableGen backend for creating passes
This is exposing the basic functionalities (create, nest, addPass, run) of
the PassManager through the C API in the new header: `include/mlir-c/Pass.h`.

In order to exercise it in the unit-test, a basic TableGen backend is
also provided to generate a simple C wrapper around the pass
constructor. It is used to expose the libTransforms passes to the C API.

Reviewed By: stellaraccident, ftynse

Differential Revision: https://reviews.llvm.org/D90667
2020-11-04 06:36:31 +00:00
George Mitenkov 89808ce734 [MLIR][mlir-spirv-cpu-runner] A SPIR-V cpu runner prototype
This patch introduces a SPIR-V runner. The aim is to run a gpu
kernel on a CPU via GPU -> SPIRV -> LLVM conversions. This is a first
prototype, so more features will be added in due time.

- Overview
The runner follows similar flow as the other runners in-tree. However,
having converted the kernel to SPIR-V, we encode the bind attributes of
global variables that represent kernel arguments. Then SPIR-V module is
converted to LLVM. On the host side, we emulate passing the data to device
by creating in main module globals with the same symbolic name as in kernel
module. These global variables are later linked with ones from the nested
module. We copy data from kernel arguments to globals, call the kernel
function from nested module and then copy the data back.

- Current state
At the moment, the runner is capable of running 2 modules, nested one in
another. The kernel module must contain exactly one kernel function. Also,
the runner supports rank 1 integer memref types as arguments (to be scaled).

- Enhancement of JitRunner and ExecutionEngine
To translate nested modules to LLVM IR, JitRunner and ExecutionEngine were
altered to take an optional (default to `nullptr`) function reference that
is a custom LLVM IR module builder. This allows to customize LLVM IR module
creation from MLIR modules.

Reviewed By: ftynse, mravishankar

Differential Revision: https://reviews.llvm.org/D86108
2020-10-26 09:09:29 -04:00
Lei Zhang 36ce915ac5 Revert "Revert "[mlir] Convert from Async dialect to LLVM coroutines""
This reverts commit 4986d5eaff with
proper patches to CMakeLists.txt:

- Add MLIRAsync as a dependency to MLIRAsyncToLLVM
- Add Coroutines as a dependency to MLIRExecutionEngine
2020-10-22 15:23:11 -04:00
Mehdi Amini 4986d5eaff Revert "[mlir] Convert from Async dialect to LLVM coroutines"
This reverts commit a8b0ae3bdd
and commit f8fcff5a9d.

The build with SHARED_LIBRARY=ON is broken.
2020-10-22 19:12:19 +00:00
Eugene Zhulenev f8fcff5a9d [mlir] Convert from Async dialect to LLVM coroutines
Lower from Async dialect to LLVM by converting async regions attached to `async.execute` operations into LLVM coroutines (https://llvm.org/docs/Coroutines.html):
1. Outline all async regions to functions
2. Add LLVM coro intrinsics to mark coroutine begin/end
3. Use MLIR conversion framework to convert all remaining async types and ops to LLVM + Async runtime function calls

All `async.await` operations inside async regions converted to coroutine suspension points. Await operation outside of a coroutine converted to the blocking wait operations.

Implement simple runtime to support concurrent execution of coroutines.

Reviewed By: herhut

Differential Revision: https://reviews.llvm.org/D89292
2020-10-22 06:30:46 -07:00
Alex Zinenko 75f239e975 [mlir] Initial version of C APIs
Introduce an initial version of C API for MLIR core IR components: Value, Type,
    Attribute, Operation, Region, Block, Location. These APIs allow for both
    inspection and creation of the IR in the generic form and intended for wrapping
    in high-level library- and language-specific constructs. At this point, there
    is no stability guarantee provided for the API.

Reviewed By: stellaraccident, lattner

Differential Revision: https://reviews.llvm.org/D83310
2020-08-05 15:04:08 +02:00