Combine the EarlyOut and IsContiguous range check.
Also avoid "comparison is always false" warnings in emitted code when
the lower-bound check is against 0.
- Add class `CodeGenIntrinsicMap` for on-demand creation of
`CodeGenIntrinsic`.
- Add class `CodeGenIntrinsicContext` to capture global information
required to build `CodeGenIntrinsic` objects.
- Adopt GlobalISel PatternParser and SearchableTableEmitter to use it.
CodeGenIntrinsic changes:
- Use `const` Record pointers, and `StringRef` when possible.
- Default initialize several fields with their definition instead of in
the constructor.
- Simplify various string checks in the constructor using StringRef
starts_with()/ends_with() functions.
- Eliminate first argument to `setDefaultProperties` and use `TheDef`
class member instead.
IntrinsicEmitter changes:
- Emit `namespace llvm::Intrinsic` instead of nested namespaces.
- End generated comments with a .
- Use range based for loops, and early continue within loops.
- Emit `static constexpr` instead of `static const` for arrays.
- Change `compareFnAttributes` to use std::tie() to compare intrinsic
attributes and return a default value when all attributes are equal.
STLExtras:
- Add std::replace wrapper which takes a range.
In the RISC-V architecture, multiple vendor-specific Control and Status
Registers (CSRs) share the same encoding. However, the existing lookup
function, which currently returns only a single result, falls short.
During disassembly, it consistently returns the first CSR encountered,
which may not be the correct CSR for the subtarget.
To address this issue, we modify the function definition to return a
range of results. These results can then be iterated upon to identify
the CSR that best fits the subtarget’s feature requirements. The
behavior of this new definition is controlled by a variable named
`ReturnRange`, which defaults to `false`.
Specifically, this patch introduces support for emitting a new lookup
function for the primary key. This function returns a pair of iterators
pointing to the first and last values, providing a comprehensive range
of values that satisfy the query
Refactor of the llvm-tblgen source into:
- a "Basic" library, which contains the bare minimum utilities to build
`llvm-min-tablegen`
- a "Common" library which contains all of the helpers for TableGen
backends. Such helpers can be shared by more than one backend, and even
unit tested (e.g. CodeExpander is, maybe we can add more over time)
Fixes#80647
Fields GenericField::IsInstruction and GenericField::Enum can be
simultaneously active for a given field. Methods compareBy and
primaryRepresentation both order the checking of IsInstruction before
GenericField::Enum. Do the same in getNumericKey for consistency.
Currently, for some tables involving a single primary key field which is
integral and densely numbered, a direct lookup is generated rather than
a binary search. This patch extends the direct lookup function
generation to instructions, where the integral value corresponds to the
instruction's enum value.
While this isn't as common as for other tables, it does occur in at
least one downstream backend and one in-tree backend.
Added a unit test and minimally updated the documentation.
We used to return `int` in `getAsInt`, while `IntInit::getValue`
returns `int64_t` and `utohexstr` needs `uint64_t`. The casting
causes the wrong hex value when printing bits value.
A field `FilterClassField` is added to `GenericTable` class, which
is an optional bit field of `FilterClass`. If specified, only those
records with this field being true will have corresponding entries
in the table.
Use deduction guides instead of helper functions.
The only non-automatic changes have been:
1. ArrayRef(some_uint8_pointer, 0) needs to be changed into ArrayRef(some_uint8_pointer, (size_t)0) to avoid an ambiguous call with ArrayRef((uint8_t*), (uint8_t*))
2. CVSymbol sym(makeArrayRef(symStorage)); needed to be rewritten as CVSymbol sym{ArrayRef(symStorage)}; otherwise the compiler is confused and thinks we have a (bad) function prototype. There was a few similar situation across the codebase.
3. ADL doesn't seem to work the same for deduction-guides and functions, so at some point the llvm namespace must be explicitly stated.
4. The "reference mode" of makeArrayRef(ArrayRef<T> &) that acts as no-op is not supported (a constructor cannot achieve that).
Per reviewers' comment, some useless makeArrayRef have been removed in the process.
This is a follow-up to https://reviews.llvm.org/D140896 that introduced
the deduction guides.
Differential Revision: https://reviews.llvm.org/D140955
llvm::sort is beneficial even when we use the iterator-based overload,
since it can optionally shuffle the elements (to detect
non-determinism). However llvm::sort is not usable everywhere, for
example, in compiler-rt.
Reviewed By: nhaehnle
Differential Revision: https://reviews.llvm.org/D130406
This commits removes TableGens reliance on managed static global record state
by moving the RecordContext into the RecordKeeper. The RecordKeeper is now
treated similarly to a (LLVM|MLIR|etc)Context object and is passed to static
construction functions. This is an important step forward in removing TableGens
reliance on global state, and in a followup will allow for users that parse tablegen
to parse multiple tablegen files without worrying about Record lifetime.
Differential Revision: https://reviews.llvm.org/D125276
Based on the output of include-what-you-use.
It's an utility directory, so no much impact on other code areas.
clang++ -E -Iinclude -I../llvm/include ../llvm/utils/TableGen/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l
before: 4327274
after: 4316190
Related discourse thread: https://llvm.discourse.group/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D118466
This is often used for anonymous definitions, so we were sorting by
"anonymous_1234" record names, which while less bad than pointers can be easily
perturbed by adding code even in completely unrelated systems. That causes test
failures on AArch64 when sysregs with multiple valid names suddenly start
printing a different one.
Some of these were found by running clang-format over the generated
code, although that complains about far more issues than I have fixed
here.
Differential Revision: https://reviews.llvm.org/D90937
Intrinsic properties can now be set to default and applied to all
intrinsics. If the attributes are not needed, the user can opt-out by
setting the DisableDefaultAttributes flag to true.
Differential Revision: https://reviews.llvm.org/D70365
Summary:
Previously TableGen would crash trying to print the undefined value as
an integer.
Change-Id: I3900071ceaa07c26acafb33bc49966d7d7a02828
Reviewers: nhaehnle
Subscribers: llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D74210
This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.
This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.
This doesn't actually modify StringRef yet, I'll do that in a follow-up.
This requires std::intializer_list to be a literal type, which it is
starting with C++14. The downside is that std::bitset is still not
constexpr-friendly so this change contains a re-implementation of most
of it.
Shrinks clang by ~60k.
llvm-svn: 369847
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
llvm-svn: 369013
Summary:
While working on the GISel Combiner, I noticed I was producing location-less
error messages fairly often and set about fixing this. In the process, I
noticed quite a few places elsewhere in TableGen that also neglected to include
a relevant location.
This patch adds locations to errors that relate to a specific record (or a
field within it) and also have easy access to the relevant location. This is
particularly useful when multiclasses are involved as many of these errors
refer to the full name of a record and it's difficult to guess which substring
is grep-able.
Unfortunately, tablegen currently only supports Record granularity so it's not
currently possible to point at a specific Init so these sometimes point at the
record that caused the error rather than the precise origin of the error.
Reviewers: bogner, aditya_nandakumar, volkan, aemerson, paquette, nhaehnle
Reviewed By: nhaehnle
Subscribers: jdoerfert, nhaehnle, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D58077
llvm-svn: 353862
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
Summary:
As a bonus, this arguably improves the code by making it simpler.
gcc 8 on Ubuntu 18.10 reports the following:
==39667==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7fffffff8ae0 at pc 0x555555dbfc68 bp 0x7fffffff8760 sp 0x7fffffff8750
WRITE of size 8 at 0x7fffffff8ae0 thread T0
#0 0x555555dbfc67 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider::_Alloc_hider(char*, std::allocator<char>&&) /usr/include/c++/8/bits/basic_string.h:149
#1 0x555555dbfc67 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&) /usr/include/c++/8/bits/basic_string.h:542
#2 0x555555dbfc67 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&) /usr/include/c++/8/bits/basic_string.h:6009
#3 0x555555dbfc67 in searchableFieldType /home/nha/amd/build/san/llvm-src/utils/TableGen/SearchableTableEmitter.cpp:168
(...)
Address 0x7fffffff8ae0 is located in stack of thread T0 at offset 864 in frame
#0 0x555555dbef3f in searchableFieldType /home/nha/amd/build/san/llvm-src/utils/TableGen/SearchableTableEmitter.cpp:148
Reviewers: fhahn, simon_tatham, kparzysz
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D53931
llvm-svn: 345749
Summary:
This is essentially a rewrite of the backend which introduces TableGen
base classes GenericEnum, GenericTable, and SearchIndex. They allow
generating custom enums and tables with lookup functions using
separately defined records as the underlying database.
Also added as part of this change:
- Lookup functions may use indices composed of multiple fields.
- Instruction fields are supported similar to Intrinsic fields.
- When the lookup key has contiguous numeric values, the lookup
function will directly index into the table instead of using a binary
search.
The existing SearchableTable functionality is internally mapped to the
new primitives.
Change-Id: I444f3490fa1dbfb262d7286a1660a2c4308e9932
Reviewers: arsenm, tra, t.p.northover
Subscribers: wdng, llvm-commits
Differential Revision: https://reviews.llvm.org/D48013
llvm-svn: 335225
Summary:
We will use this in the AMDGPU backend in a subsequent patch
in the stack to lookup target-specific per-intrinsic information.
The generic CodeGenIntrinsic machinery is used to ensure that,
even though we don't calculate actual enum values here, we do
get the intrinsics in the right order for the binary search
index.
Change-Id: If61cd5587963a4c5a1cc53df1e59c5e4dec1f9dc
Reviewers: arsenm, rampitec, b-sumner
Subscribers: wdng, tpr, llvm-commits
Differential Revision: https://reviews.llvm.org/D44935
llvm-svn: 328937
