If the inrange keyword is present before any index, loading from or
storing to any pointer derived from the getelementptr has undefined
behavior if the load or store would access memory outside of the bounds of
the element selected by the index marked as inrange.
This can be used, e.g. for alias analysis or to split globals at element
boundaries where beneficial.
As previously proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-July/102472.html
Differential Revision: https://reviews.llvm.org/D22793
llvm-svn: 286514
Summary:
This is the initial version of the documentation for how to use XRay as
it stands in LLVM, Clang, and compiler-rt. We leave some room for later
expansion mentioining what is work in progress and what could be
expected moving forward.
We also give a high level overview of future work that's both ongoing
and planned.
Reviewers: echristo, dblaikie, chandlerc
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D26386
llvm-svn: 286319
programmer's manual.
ExitOnError is often a better alternative to handleErrors for tool code. This
patch makes it easier to find the ExitOnError discussion when reading the
handleErrors section.
Thanks to Peter Collingbourne for the suggestion.
llvm-svn: 286167
Summary:
This allows to have clang and llvm and the other subprojects
side-by-side instead of nested. This can be used with the monorepo or
multiple repos.
It will help having a single set of sources checked out but allows to
have a build directory with llvm and another one with llvm+clang.
Basically it abstracts LLVM_EXTERNAL_xxxx_SOURCE_DIR making it more
convenient by adopting a convention.
Reviewers: bogner, beanz, jlebar
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D26365
llvm-svn: 286162
Summary:
Some changes are made to cmake, especially the addition of a new
LLVM_ENABLE_PROJECTS option that makes the build system aware of
the monorepo directory structure.
Also a new script is added in llvm/utils/git-svn/. When present in
the $PATH, it enables a `git llvm` command. It is providing at this
point only the ability to push from the git monorepo: `git llvm push`.
It is intended to evolves with more features, for instance I plan on
features like `git llvm show r284955` to help working with sequential
revision numbers.
The push feature is taken from Justin Lebar's script available here:
https://github.com/jlebar/llvm-repo-tools/
Reviewers: jlebar
Subscribers: mgorny, modocache, llvm-commits
Differential Revision: https://reviews.llvm.org/D26334
llvm-svn: 286123
Summary:
This kill various depreacated API related to attribute :
- The deprecated C API attribute based on LLVMAttribute enum.
- The Raw attribute set format (planned to be removed in 4.0).
Reviewers: bkramer, echristo, mehdi_amini, void
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D23039
llvm-svn: 286062
This reflects the current state of Global ISel. As progress is
made, we'll document our design decisions in it.
Comments very welcome!
llvm-svn: 286002
This contains just enough for lib/Target/RISCV to compile. Notably a basic
RISCVTargetMachine and RISCVTargetInfo. At this point you can attempt llc
-march=riscv32 myinput.ll and will find it fails due to the lack of
MCAsmInfo.
See http://lists.llvm.org/pipermail/llvm-dev/2016-August/103748.html for
further discussion
Differential Revision: https://reviews.llvm.org/D23560
llvm-svn: 285712
DW_TAG_atomic_type was already included in Dwarf.defs and emitted correctly,
however Verifier didn't recognize it as valid.
Thus we introduce the following changes:
* Make DW_TAG_atomic_type valid tag for IR and DWARF (enabled only with -gdwarf-5)
* Add it to related docs
* Add DebugInfo tests
Differential Revision: https://reviews.llvm.org/D26144
llvm-svn: 285624
* Assume that clang passes non-zero alignment value to DIBuilder
only in case when it was forced by C++11 'alignas', C11 '_Alignas'
or compiler attribute '__attribute__((aligned (N)))'.
* Emit DW_AT_alignment if alignment is specified for type/object.
Differential Revision: https://reviews.llvm.org/D24425
llvm-svn: 285189
* Assume that clang passes non-zero alignment value to DIBuilder
only in case when it was forced by C++11 'alignas', C11 '_Alignas'
or compiler attribute '__attribute__((aligned (N)))'.
* Emit DW_AT_alignment if alignment is specified for type/object.
Differential Revision: https://reviews.llvm.org/D24425
llvm-svn: 285181
This patch updates some of the existing Error examples, expands on the
documentation for handleErrors, and includes new sections that cover
a number of helpful utilities and common error usage idioms.
llvm-svn: 285122
Summary:
The RFC proposal sent to increase the minimum required GCC version
to 4.8 received a lot of support. See the following thread:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105955.html,
This patch implements that by updating the docs. I believe the
references to libstdc++ 4.7 issues can be removed as well, please
let me know if that is not the case or if they should be updated
a different way.
Reviewers: rengolin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D25683
llvm-svn: 284497
Uses of this have all been updated to use LLVM_NODISCARD, which
matches the C++17 [[nodiscard]] semantics rather than those of GCC's
__attribute__((warn_unused_result)).
llvm-svn: 284367
Summary:
* Describe new (3.3) parameter attribute group encoding, leaving old encoding there with a note about legacy
* Bring TYPE_BLOCK docs up to date
* Remove docs about obsolete (pre 3.0) TYPE_SYMTAB_BLOCK, TST_CODE_ENTRY
* Fix a couple of incorrect comments and remove one unused enum definition along the way
This addresses https://llvm.org/bugs/show_bug.cgi?id=28941.
Patch by: Ismail Badawi <ibadawi@cisco.com>
Differential Revision: https://reviews.llvm.org/D25623
llvm-svn: 284246
Added relocation names:
- R_AMDGPU_GOTPCREL32_LO
- R_AMDGPU_GOTPCREL32_HI
- R_AMDGPU_REL32_LO
- R_AMDGPU_REL32_HI
AMDGPU isa only supports 32-bit immediates. In order to access 64-bit address we need to generate 32-bit lo/hi relocations, and do the right math (separate patch). Currently we only generate one 32 bit relocation for lower bits for each access, losing higher bits. Hence we need relocations listed above.
Differential Revision: https://reviews.llvm.org/D25546
llvm-svn: 284191
