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David Sherwood c46fc6adbe [SVE] Fall back on DAG ISel at -O0 when encountering scalable types 
At the moment we use Global ISel by default at -O0, however it is
currently not capable of dealing with scalable vectors for two
reasons:

1. The register banks know nothing about SVE registers.
2. The LLT (Low Level Type) class knows nothing about scalable
   vectors.

For now, the easiest way to avoid users hitting issues when using
the SVE ACLE is to fall back on normal DAG ISel when encountering
instructions that operate on scalable vector types.

I've added a couple of RUN lines to existing SVE tests to ensure
we can compile at -O0. I've also added some new tests to

  CodeGen/AArch64/GlobalISel/arm64-fallback.ll

that demonstrate we correctly fallback to DAG ISel at -O0 when
lowering formal arguments or translating instructions that involve
scalable vector types.

Differential Revision: https://reviews.llvm.org/D81557
2020-06-19 10:57:00 +01:00
benchmarks
bindings Fix go bindings after FixedVectorType -> VectorType change. 2020-05-15 16:37:57 -07:00
cmake Revert "[llvm] Added support for stand-alone cmake object libraries." 2020-06-15 12:15:39 -07:00
docs AMDGPU: Update private null pointer value in documentation 2020-06-18 17:27:19 -04:00
examples StoreInst should store Align, not MaybeAlign 2020-05-15 12:26:58 -07:00
include [SVE] Fall back on DAG ISel at -O0 when encountering scalable types 2020-06-19 10:57:00 +01:00
lib [SVE] Fall back on DAG ISel at -O0 when encountering scalable types 2020-06-19 10:57:00 +01:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [CMake][runtimes] Skip adding 2nd set of the same variables for a generic target 2020-06-15 09:59:27 +02:00
test [SVE] Fall back on DAG ISel at -O0 when encountering scalable types 2020-06-19 10:57:00 +01:00
tools [MC] Pass the symbol rather than its name to onSymbolStart() 2020-06-19 09:30:12 +05:30
unittests [LiveIntervals] Fix early-clobber handling in handleMoveUp 2020-06-19 10:17:04 +01:00
utils [gn build] Port 9ca50e887db 2020-06-19 01:17:54 +00:00
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt Automatically configure MLIR when flang is enabled 2020-05-27 07:31:49 +00:00
CODE_OWNERS.TXT Make myself code owner of InferAddressSpaces 2020-06-08 21:26:01 -04:00
configure
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +00:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.