This rename was made as part of
https://github.com/llvm/llvm-project/pull/147835 in order to ease
rebasing the PR, and give a nice window for other patches to get rebased
as well.
It has been a while already, so lets go ahead and rename it back.
This makes the type printer not qualify constructor and destructor
names. These are represented as canonical types and the type printer is
used, but unlike canonical types which we normally print as fully
qualified, the expected behaviour for declaration names is for them to
be unqualified.
Note that this restores the behaviour pre #147835, but that is still
broken for the constructor names of class templates, since in that case
the injected class name type is used, but here the type printer is
configured to also print the implicit template arguments.
No release notes since this regression was never released.
Fixes#155537
This reintroduces `Type.h`, having earlier been renamed to `TypeBase.h`,
as a redirection to `TypeBase.h`, and redirects most users to include
the former instead.
This is a preparatory patch for being able to provide inline definitions
for `Type` methods which would otherwise cause a circular dependency
with `Decl{,CXX}.h`.
Doing these operations into their own NFC patch helps the git rename
detection logic work, preserving the history.
This patch makes clang just a little slower to build (~0.17%), just
because it makes more code indirectly include `DeclCXX.h`.
This is a preparatory patch, to be able to provide inline definitions
for `Type` functions which depend on `Decl{,CXX}.h`. As the latter also
depends on `Type.h`, this would not be possible without some
reorganizing.
Splitting this rename into its own patch allows git to track this as a
rename, and preserve all git history, and not force any code
reformatting.
A later NFC patch will reintroduce `Type.h` as redirection to
`TypeBase.h`, rewriting most places back to directly including `Type.h`
instead of `TypeBase.h`, leaving only a handful of places where this is
necessary.
Then yet a later patch will exploit this by making more stuff inline.
This is a major change on how we represent nested name qualifications in
the AST.
* The nested name specifier itself and how it's stored is changed. The
prefixes for types are handled within the type hierarchy, which makes
canonicalization for them super cheap, no memory allocation required.
Also translating a type into nested name specifier form becomes a no-op.
An identifier is stored as a DependentNameType. The nested name
specifier gains a lightweight handle class, to be used instead of
passing around pointers, which is similar to what is implemented for
TemplateName. There is still one free bit available, and this handle can
be used within a PointerUnion and PointerIntPair, which should keep
bit-packing aficionados happy.
* The ElaboratedType node is removed, all type nodes in which it could
previously apply to can now store the elaborated keyword and name
qualifier, tail allocating when present.
* TagTypes can now point to the exact declaration found when producing
these, as opposed to the previous situation of there only existing one
TagType per entity. This increases the amount of type sugar retained,
and can have several applications, for example in tracking module
ownership, and other tools which care about source file origins, such as
IWYU. These TagTypes are lazily allocated, in order to limit the
increase in AST size.
This patch offers a great performance benefit.
It greatly improves compilation time for
[stdexec](https://github.com/NVIDIA/stdexec). For one datapoint, for
`test_on2.cpp` in that project, which is the slowest compiling test,
this patch improves `-c` compilation time by about 7.2%, with the
`-fsyntax-only` improvement being at ~12%.
This has great results on compile-time-tracker as well:
This patch also further enables other optimziations in the future, and
will reduce the performance impact of template specialization resugaring
when that lands.
It has some other miscelaneous drive-by fixes.
About the review: Yes the patch is huge, sorry about that. Part of the
reason is that I started by the nested name specifier part, before the
ElaboratedType part, but that had a huge performance downside, as
ElaboratedType is a big performance hog. I didn't have the steam to go
back and change the patch after the fact.
There is also a lot of internal API changes, and it made sense to remove
ElaboratedType in one go, versus removing it from one type at a time, as
that would present much more churn to the users. Also, the nested name
specifier having a different API avoids missing changes related to how
prefixes work now, which could make existing code compile but not work.
How to review: The important changes are all in
`clang/include/clang/AST` and `clang/lib/AST`, with also important
changes in `clang/lib/Sema/TreeTransform.h`.
The rest and bulk of the changes are mostly consequences of the changes
in API.
PS: TagType::getDecl is renamed to `getOriginalDecl` in this patch, just
for easier to rebasing. I plan to rename it back after this lands.
Fixes#136624
Fixes https://github.com/llvm/llvm-project/issues/43179
Fixes https://github.com/llvm/llvm-project/issues/68670
Fixes https://github.com/llvm/llvm-project/issues/92757
string_view has a slightly weaker contract, which only specifies whether
the value is bigger or smaller than 0. Adapt users accordingly and just
forward to the standard function (that also compiles down to memcmp)
This avoids an unnecessary copy required by 'return OS.str()', allowing
instead for NRVO or implicit move. The .str() call (which flushes the
stream) is no longer required since 65b13610a5226b84889b923bae884ba395ad084d,
which made raw_string_ostream unbuffered by default.
Differential Revision: https://reviews.llvm.org/D115374
This change makes `DeclarationNameLoc` a proper class and refactors its
users to use getter methods instead of accessing the members directly.
The change also makes `DeclarationNameLoc` immutable (i.e., it cannot
be modified once constructed).
Reviewed By: aprantl
Differential Revision: https://reviews.llvm.org/D94596
This is the second part loosely extracted from D71179 and cleaned up.
This patch provides semantic analysis support for `omp begin/end declare
variant`, mostly as defined in OpenMP technical report 8 (TR8) [0].
The sema handling makes code generation obsolete as we generate "the
right" calls that can just be handled as usual. This handling also
applies to the existing, albeit problematic, `omp declare variant
support`. As a consequence a lot of unneeded code generation and
complexity is removed.
A major purpose of this patch is to provide proper `math.h`/`cmath`
support for OpenMP target offloading. See PR42061, PR42798, PR42799. The
current code was developed with this feature in mind, see [1].
The logic is as follows:
If we have seen a `#pragma omp begin declare variant match(<SELECTOR>)`
but not the corresponding `end declare variant`, and we find a function
definition we will:
1) Create a function declaration for the definition we were about to generate.
2) Create a function definition but with a mangled name (according to
`<SELECTOR>`).
3) Annotate the declaration with the `OMPDeclareVariantAttr`, the same
one used already for `omp declare variant`, using and the mangled
function definition as specialization for the context defined by
`<SELECTOR>`.
When a call is created we inspect it. If the target has an
`OMPDeclareVariantAttr` attribute we try to specialize the call. To this
end, all variants are checked, the best applicable one is picked and a
new call to the specialization is created. The new call is used instead
of the original one to the base function. To keep the AST printing and
tooling possible we utilize the PseudoObjectExpr. The original call is
the syntactic expression, the specialized call is the semantic
expression.
[0] https://www.openmp.org/wp-content/uploads/openmp-TR8.pdf
[1] https://reviews.llvm.org/D61399#change-496lQkg0mhRN
Reviewers: kiranchandramohan, ABataev, RaviNarayanaswamy, gtbercea, grokos, sdmitriev, JonChesterfield, hfinkel, fghanim, aaron.ballman
Subscribers: bollu, guansong, openmp-commits, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D75779
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
Introduce the following optimizations in DeclarationName(Table):
1. Store common kinds inline in DeclarationName instead of
DeclarationNameExtra. Currently the kind of C++ constructor, destructor,
conversion function and overloaded operator names is stored in
DeclarationNameExtra. Instead store it inline in DeclarationName.
To do this align IdentifierInfo, CXXSpecialName, DeclarationNameExtra
and CXXOperatorIdName to 8 bytes so that we can use the lower 3 bits of
DeclarationName::Ptr. This is already the case on 64 bits archs anyway.
This also allow us to remove DeclarationNameExtra from CXXSpecialName
and CXXOperatorIdName, which shave off a pointer from CXXSpecialName.
2. Synchronize the enumerations DeclarationName::NameKind,
DeclarationName::StoredNameKind and Selector::IdentifierInfoFlag.
This makes DeclarationName::getNameKind much more efficient since we can
replace the switch table by a single comparison and an addition.
3. Put the overloaded operator names inline in DeclarationNameTable to remove
an indirection. This increase the size of DeclarationNameTable a little
bit but this is not important since it is only used in ASTContext, and
never copied nor moved from. This also get rid of the last dynamic
allocation in DeclarationNameTable.
Altogether these optimizations cut the run time of parsing all of Boost by
about 0.8%. While we are at it, do the following NFC modifications:
1. Put the internal classes CXXSpecialName, CXXDeductionGuideNameExtra,
CXXOperatorIdName, CXXLiteralOperatorIdName and DeclarationNameExtra
in a namespace detail since these classes are only meant to be used by
DeclarationName and DeclarationNameTable. Make this more explicit by making
the members of these classes private and friending DeclarationName(Table).
2. Make DeclarationName::getFETokenInfo a non-template since every users are
using it to get a void *. It was supposed to be used with a type to avoid
a subsequent static_cast.
3. Change the internal functions DeclarationName::getAs* to castAs* since when
we use them we already know the correct kind. This has no external impact
since all of these are private.
Reviewed By: erichkeane, rjmccall
Differential Revision: https://reviews.llvm.org/D52267
llvm-svn: 342729
DeclarationNameTable currently hold 3 "void *" to
FoldingSet<CXXSpecialName>, FoldingSet<CXXLiteralOperatorIdName>
and FoldingSet<CXXDeductionGuideNameExtra>.
CXXSpecialName, CXXLiteralOperatorIdName and
CXXDeductionGuideNameExtra are private classes holding extra
information about a "special" declaration name and are in
AST/DeclarationName.cpp. The original intent seems to have
been to keep these classes private and only expose
DeclarationNameExtra and DeclarationName (the code dates from
2008 and has not been significantly changed since).
However this make the code less straightforward than necessary
because of the need to have "void *" in DeclarationNameTable
(with 1 of 3 comments wrong) and to manually allocate/deallocate
the FoldingSets.
Moreover removing the extra indirections reduce the run-time of
an fsyntax-only on all of Boost by 2.3% which is not totally
unexpected given how frequently this data structure is used
(especially for C++).
A concern raised by erichkeane during the review was that
including Type.h would increase the compile time unreasonably.
However test builds (both clean and incremental) showed that
this patch did not result in any compile time increase.
Reviewed By: erichkeane
Differential Revision: https://reviews.llvm.org/D50261
llvm-svn: 339030
We model deduction-guides as functions with a new kind of name that identifies
the template whose deduction they guide; the bulk of this patch is adding the
new name kind. This gives us a clean way to attach an extensible list of guides
to a class template in a way that doesn't require any special handling in AST
files etc (and we're going to need these functions we come to performing
deduction).
llvm-svn: 294266
an identifier table lookup, *and* copy the LangOptions (including various
std::vector<std::string>s). Twice. We call this function once each time we start
parsing a declaration specifier sequence, and once for each call to Sema::Diag.
This reduces the compile time for a sample .c file from the linux kernel by 20%.
llvm-svn: 270009
Enable it for USRs and names when indexing.
Forward references can have different template argument names; including them
makes USRs and names unstable, since the name depends on whether we saw a forward reference or not.
llvm-svn: 260866
the "" and the suffix; that breaks names such as 'operator""if'. For symmetry,
also remove the space between the 'operator' and the '""'.
llvm-svn: 249641
- Don't emit anything when we encounter a call to a conversion operator.
"bar(a & b)" instead of "bar(a & b.operator int())"
This preserves the semantics and is still idempotent if we print the AST multiple times.
- Properly print declarations of conversion operators.
"explicit operator bool();" instead of "bool operator _Bool();"
PR18776.
llvm-svn: 202167
language options. This is not really ideal -- we should require the right
language options to be passed in, or not require language options to format a
name -- but it fixes a number of *obviously* wrong formattings. Patch by
Olivier Goffart!
llvm-svn: 199778
ASTDumper was already trying to do this & instead got an implicit bool
conversion by surprise (thus printing out 0 or 1 instead of the name of
the declaration). To avoid that issue & simplify call sites, simply make
it the normal/expected operator<<(raw_ostream&, ...) overload & simplify
all the existing call sites. (bonus: this function doesn't need to be a
member or friend, it's just using public API in DeclarationName)
llvm-svn: 181832
that bridging between the two is free. Saves ~4k of code size,
although I don't see any measurable performance difference
(unfortunately).
llvm-svn: 156187
This seems to negatively affect compile time onsome ObjC tests
(which use a lot of partial diagnostics I assume). I have to come
up with a way to keep them inline without including Diagnostic.h
everywhere. Now adding a new diagnostic requires a full rebuild
of e.g. the static analyzer which doesn't even use those diagnostics.
This reverts commit 6496bd10dc3a6d5e3266348f08b6e35f8184bc99.
This reverts commit 7af19b817ba964ac560b50c1ed6183235f699789.
This reverts commit fdd15602a42bbe26185978ef1e17019f6d969aa7.
This reverts commit 00bd44d5677783527d7517c1ffe45e4d75a0f56f.
This reverts commit ef9b60ffed980864a8db26ad30344be429e58ff5.
llvm-svn: 150006
Fix all the files that depended on transitive includes of Diagnostic.h.
With this patch in place changing a diagnostic no longer requires a full rebuild of the StaticAnalyzer.
llvm-svn: 149781
