This is one of the darker corners of C++, make it clear that this is
about constants and rephrase it a bit.
Before: lambda capture 'i' is not required to be captured for this use
After: lambda capture of constant 'i' is not required for this use
llvm-svn: 337152
Marking a symbolic expression as live is non-recursive. In our checkers we
either use conjured symbols or conjured symbols plus/minus integers to
represent abstract position of iterators, so in this latter case we also
must mark the `SymbolData` part of these symbolic expressions as live to
prevent them from getting reaped.
Differential Revision: https://reviews.llvm.org/D48764
llvm-svn: 337151
This diff adds a fixit to suggest removing unused lambda captures
in the appropriate diagnostic.
Patch by Andrew Comminos!
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D48845
llvm-svn: 337148
This mangles entry points wmain, WinMain, wWinMain or DllMain as C
functions, to match the ABI for these functions.
We already did the same for these functions in MSVC mode, but we also
should do the same in the Itanium ABI.
This fixes PR38124.
Differential Revision: https://reviews.llvm.org/D49354
llvm-svn: 337146
When building runtimes for Linux as part of Fuchsia toolchain, use
libc++ and compiler-rt for sanitizers.
Differential Revision: https://reviews.llvm.org/D49331
llvm-svn: 337117
Summary:
Currently clang looks up the coroutine_traits ClassTemplateDecl
everytime it looks up the promise type. This is unnecessary
as coroutine_traits doesn't change between promise type lookups.
This diff caches the coroutine_traits lookup.
Patch by Tanoy Sinha!
Test Plan:
I added log statements in the new lookupCoroutineTraits function
to ensure that LookupQualifiedName was only called once even
when multiple coroutines existed in the source file.
Reviewers: modocache, GorNishanov
Reviewed By: modocache
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D48981
llvm-svn: 337103
This reflects the fact that only ASTContext should ever create an
instance of BuiltinType, and matches what we do for all the other Type
subclasses.
llvm-svn: 337048
Summary: Automatic variable initialization was generating default-aligned stores (which are deprecated) instead of using the known alignment from the alloca. Further, they didn't specify inbounds.
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D49209
llvm-svn: 337041
Summary:
Introduce built-ins to read the unsafe stack top and bottom. The unsafe
stack top is required to implement garbage collection scanning for
Oilpan. Currently there is already a built-in 'get_unsafe_stack_start'
to read the bottom of the unsafe stack, but I chose to duplicate this
API because 'start' is ambiguous (e.g. Oilpan uses WTF::GetStackStart to
read the safe stack top.)
Reviewers: pcc
Reviewed By: pcc
Subscribers: llvm-commits, kcc
Differential Revision: https://reviews.llvm.org/D49152
llvm-svn: 337037
As listed in the above PRs, vector_size doesn't allow
dependent types/values. This patch introduces a new
DependentVectorType to handle a VectorType that has a dependent
size or type.
In the future, ALL the vector-types should be able to create one
of these to handle dependent types/sizes as well. For example,
DependentSizedExtVectorType could likely be switched to just use
this instead, though that is left as an exercise for the future.
Differential Revision: https://reviews.llvm.org/D49045
llvm-svn: 337036
Summary: In the SPMD case, we need to initialize the data sharing and globalization infrastructure. This covers the case when an SPMD region calls a function in a different compilation unit.
Reviewers: ABataev, carlo.bertolli, caomhin
Reviewed By: ABataev
Subscribers: Hahnfeld, jholewinski, guansong, cfe-commits
Differential Revision: https://reviews.llvm.org/D49188
llvm-svn: 337015
It was not possible to disable alpha.unix.cstring.OutOfBounds checker's reports
since unix.Malloc checker always implicitly enabled the filter. Moreover if the
checker was disabled from command line (-analyzer-disable-checker ..) the out
of bounds warnings were nevertheless emitted under different checker names such
as unix.cstring.NullArg, or unix.Malloc.
This patch fixes the case sot that Malloc checker only enables implicitly the
underlying modeling of strcpy, memcpy etc. but not the warning messages that
would have been emmitted by alpha.unix.cstring.OutOfBounds
Patch by: Dániel Krupp
Differential Revision: https://reviews.llvm.org/D48831
llvm-svn: 337000
function parameter packs.
This makes our handling of non-trailing function parameter packs
consistent between the case of deduction at the top level in a function
call and other cases where deduction encounters a non-trailing function
parameter pack.
Instead of treating a non-trailing pack and all later parameters as
being non-deduced, we treat a non-trailing pack as exactly matching
any explicitly-specified template arguments (or being an empty pack
if there are no such arguments). This corresponds to the "never deduced"
rule in [temp.deduct.call]p1, but generalized to all deduction contexts.
Non-trailing template argument packs still result in the entire
template argument list being treated as non-deduced, as specified in
[temp.deduct.type]p9.
llvm-svn: 336962
Basically, "AttributeList" loses all list-like mechanisms, ParsedAttributes is
switched to use a TinyPtrVector (and a ParsedAttributesView is created to
have a non-allocating attributes list). DeclaratorChunk gets the later kind,
Declarator/DeclSpec keep ParsedAttributes.
Iterators are added to the ParsedAttribute types so that for-loops work.
llvm-svn: 336945
This diagnostic triggers when -fsanitize=object-size is explicitly
specified but will be a no-op (i.e, at -O0).
This diagnostic should not fail a -Werror build because it's just an
explanatory note to the user. It's not always actionable.
For example, a user may not be able to simply disable object-size,
because they want it enabled in optimized builds.
rdar://42128447
llvm-svn: 336937
As the code for the checker grew, it became increasinly difficult to see
whether a function was global or statically defined. In this patch,
anything that isn't a type declaration or definition was moved out of the
anonymous namespace and is marked as static.
llvm-svn: 336901
Summary:
Importing a function having a struct definition in the parameter list
causes a crash in the importer via infinite recursion. This patch avoids
the crash and reports such functions as not supported. Unit tests make
sure that normal struct definitions inside function bodies work normally
on the other hand and LLDB-like type imports also do.
Reviewers: a.sidorin, martong
Differential Revision: https://reviews.llvm.org/D47946
Patch by Zoltan Gera!
llvm-svn: 336898
Summary:
Generalize the creation of Decl nodes during Import. With this patch we do the
same things after and before a new AST node is created (::Create) The import
logic should be really simple, we create the node, then we mark that as
imported, then we recursively import the parts for that node and then set them
on that node. However, the AST is actually a graph, so we have to handle
circles. If we mark something as imported (`MapImported()`) then we return with
the corresponding `To` decl whenever we want to import that node again, this way
circles are handled. In order to make this algorithm work we must ensure
things, which are handled in the generic CreateDecl<> template:
* There are no `Import()` calls in between any node creation (::Create)
and the `MapImported()` call.
* Before actually creating an AST node (::Create), we must check if
the Node had been imported already, if yes then return with that one.
One very important case for this is connected to templates: we may
start an import both from the templated decl of a template and from
the template itself.
Now, the virtual `Imported` function is called in `ASTImporter::Impor(Decl *)`,
but only once, when the `Decl` is imported. One point of this refactor is to
separate responsibilities. The original `Imported()` had 3 responsibilities:
- notify subclasses when an import happened
- register the decl into `ImportedDecls`
- initialise the Decl (set attributes, etc)
Now all of these are in separate functions:
- `Imported`
- `MapImported`
- `InitializeImportedDecl`
I tried to check all the clients, I executed tests for `ExternalASTMerger.cpp`
and some unittests for lldb.
Reviewers: a.sidorin, balazske, xazax.hun, r.stahl
Subscribers: rnkovacs, dkrupp, cfe-commits
Differential Revision: https://reviews.llvm.org/D47632
llvm-svn: 336896
types.
We previously tried to use the "parameter is a reference" logic here,
but that doesn't work because it gets P and A backwards. Instead, add
a separate implementation of the "deduced A can be less qualified than
A" rule.
This also exposes that we incorrectly stripped cv-qualifiers from the
referent of A if it was a reference. However, if we don't do that, we
get the wrong results when P is a reference. In an attempt to match
what sanity dictates and what other implementations are doing, we now
remove cv-qualifiers from A and P unless both are reference types. I've
brought this up on the core reflector too, to try to get the standard
fixed.
llvm-svn: 336867
string, choose the strictest one instead of the last.
Also fix an undefined behavior. Move the pointer update to a later point to
avoid adding StringRef::npos to the pointer.
rdar://problem/40706280
llvm-svn: 336863
with another in template argument deduction.
We happened to typically get away with getting this wrong, because the
cases where we'd produce a bogus deduction were caught by the final
"deduced A is compatible with A" check.
llvm-svn: 336852
Code in `CodeGenModule::SetFunctionAttributes()` could set an empty
attribute `implicit-section-name` on a function that is affected by
`#pragma clang text="section"`. This is incorrect because the attribute
should contain a valid section name. If the function additionally also
used `__attribute__((section("section")))` then this could result in
emitting the function in a section with an empty name.
The patch fixes the issue by removing the problematic code that sets
empty `implicit-section-name` from
`CodeGenModule::SetFunctionAttributes()` because it is sufficient to set
this attribute only from a similar code in `setNonAliasAttributes()`
when the function is emitted.
Differential Revision: https://reviews.llvm.org/D48916
llvm-svn: 336842
Previously, the checker only tracked one raw pointer symbol for each
container object. But member functions returning a pointer to the
object's inner buffer may be called on the object several times. These
pointer symbols are now collected in a set inside the program state map
and thus all of them is checked for use-after-free problems.
Differential Revision: https://reviews.llvm.org/D49057
llvm-svn: 336835
This reverts commit r336807. This breaks users of
ClangTool::mapVirtualFile. Will try to investigate a fix. See also the
discussion on https://reviews.llvm.org/D48903
llvm-svn: 336831
Having `using qualified::name;` for some symbol is an important signal
for clangd code completion as the user is more likely to use such
symbol. This patch helps to uprank the relevant symbols by saving
UsingShadowDecl in the new field of CodeCompletionResult and checking
whether the corresponding UsingShadowDecl is located in the main file
later in ClangD code completion routine. While the relative importance
of such signal is a subject to change in the future, this patch simply
bumps DeclProximity score to the value of 1.0 which should be enough for
now.
The patch was tested using
`$ ninja check-clang check-clang-tools`
No unexpected failures were noticed after running the relevant testsets.
Reviewers: sammccall, ioeric
Subscribers: MaskRay, jkorous, cfe-commits
Differential Revision: https://reviews.llvm.org/D49012
llvm-svn: 336810
Summary:
InMemoryFileSystem::status behaves differently than
RealFileSystem::status. The Name contained in the Status returned by
RealFileSystem::status will be the path as requested by the caller,
whereas InMemoryFileSystem::status returns the normalized path.
For example, when requested the status for "../src/first.h",
RealFileSystem returns a Status with "../src/first.h" as the Name.
InMemoryFileSystem returns "/absolute/path/to/src/first.h".
The reason for this change is that I want to make a unit test in the
clangd testsuite (where we use an InMemoryFileSystem) to reproduce a
bug I get with the clangd program (where a RealFileSystem is used).
This difference in behavior "hides" the bug in the unit test version.
In general, I guess it's good if InMemoryFileSystem works as much as
possible like RealFileSystem.
Doing so made the FileEntry::RealPathName value (assigned in
FileManager::getFile) wrong when using the InMemoryFileSystem. That's
because it assumes that vfs::File::getName will always return the real
path. I changed to to use FileSystem::getRealPath instead.
Subscribers: ilya-biryukov, ioeric, cfe-commits
Differential Revision: https://reviews.llvm.org/D48903
llvm-svn: 336807
Benjamin Kramer