Reid Kleckner [Fri, 13 Oct 2017 00:53:02 +0000 (00:53 +0000)]
[MS] Don't bail on replacing dllimport vbase dtors with base dtors
Fix PR32990 by effectively reverting r283063 and solving it a different
way.
We want to limit the hack to not replace equivalent available_externally
dtors specifically to libc++, which uses always_inline. It seems certain
versions of libc++ do not provide all the symbols that an explicit
template instantiation is expected to provide.
If we get to the code that forms a real alias, only *then* check if this
is available_externally, and do that by asking a better question, which
is "is this a declaration for the linker?", because *that's* what means
we can't form an alias to it.
As a follow-on simplification, remove the InEveryTU parameter. Its last
use guarded this code for forming aliases, but we should never form
aliases to declarations, regardless of what we know about every TU.
The test used to fail because the loop in CheckObjCMethodOverrides would
merge attribute ns_returns_retained on methods while checking whether
the overriding methods were compatible. Since OverrideSearch::Overridden
is a SmallPtrSet and the order in which the elements of the set are
visited is non-deterministic, the test would fail when method 'clone' of
the protocol 'F18P' was visited before F18(Cat)'s method 'clone' was
visited.
Erich Keane [Thu, 12 Oct 2017 23:01:53 +0000 (23:01 +0000)]
[Sema][Crash] Correctly handle an non-dependent noexcept expr in function template
It seems that all of the other templated cases are handled correctly,
however the function template case was not correctly handled. This
patch recovers from this condition by setting the function to noexcept
after diagnosing. Previously it simply set NoexceptExpr to null,
which caused an Assert when this was evaluated during substitution.
Zachary Turner [Thu, 12 Oct 2017 21:56:05 +0000 (21:56 +0000)]
[lit] Raise the logic for enabling clang & lld substitutions to llvm.
This paves the way for other projects which might /use/ clang or
lld but not necessarily need to the full set of functionality
available to clang and lld tests to be able to have a basic set
of substitutions that allow a project to run the clang or lld
executables.
Roman Lebedev [Thu, 12 Oct 2017 21:15:26 +0000 (21:15 +0000)]
[Analysis] Un-silence -Wtautological-unsigned-zero-compare in null-deref-ps.c
Stage-2 builds failed:
error: 'warning' diagnostics expected but not seen:
File /home/buildbot/modules-slave-2/clang-x86_64-linux-selfhost-modules-2/llvm.src/tools/clang/test/Analysis/null-deref-ps.c Line 238: always true
Roman Lebedev [Thu, 12 Oct 2017 20:16:51 +0000 (20:16 +0000)]
[Sema] Diagnose tautological comparison with type's min/max values
Summary:
Currently, clang only diagnoses completely out-of-range comparisons (e.g. `char` and constant `300`),
and comparisons of unsigned and `0`. But gcc also does diagnose the comparisons with the
`std::numeric_limits<>::max()` / `std::numeric_limits<>::min()` so to speak
Finally Fixes https://bugs.llvm.org/show_bug.cgi?id=34147
Continuation of https://reviews.llvm.org/D37565
Alexey Bataev [Thu, 12 Oct 2017 13:51:32 +0000 (13:51 +0000)]
[OPENMP] Fix PR34925: Fix getting thread_id lvalue for inlined regions
in C.
If we try to get the lvalue for thread_id variables in inlined regions,
we did not use the correct version of function. Fixed this bug by adding
overrided version of the function getThreadIDVariableLValue for inlined
regions.
Ivan A. Kosarev [Thu, 12 Oct 2017 11:29:46 +0000 (11:29 +0000)]
[CodeGen] Generate TBAA info along with LValue base info
This patch enables explicit generation of TBAA information in all
cases where LValue base info is propagated or constructed in
non-trivial ways. Eventually, we will consider each of these
cases to make sure the TBAA information is correct and not too
conservative. For now, we just fall back to generating TBAA info
from the access type.
This patch should not bring in any functional changes.
This is part of D38126 reworked to be a separate patch to
simplify review.
This is failing due to some code that isn't built on MSVC
so I didn't catch. Not immediately obvious how to fix this
at first glance, so I'm reverting for now.
Zachary Turner [Wed, 11 Oct 2017 23:33:06 +0000 (23:33 +0000)]
[ADT] Make Twine's copy constructor private.
There's a lot of misuse of Twine scattered around LLVM. This
ranges in severity from benign (returning a Twine from a function
by value that is just a string literal) to pretty sketchy (storing
a Twine by value in a class). While there are some uses for
copying Twines, most of the very compelling ones are confined
to the Twine class implementation itself, and other uses are
either dubious or easily worked around.
This patch makes Twine's copy constructor private, and fixes up
all callsites.
Vedant Kumar [Wed, 11 Oct 2017 21:54:09 +0000 (21:54 +0000)]
[Driver] Export symbols needed to use profile runtime
Apple's API verification tool (tapi) checks that the symbols exported
from a program match a whitelist. When the program uses the profile
runtime, some additional symbols which are typically not part of the
regular whitelist must be exported.
If we're using symbol export directives along with the profile runtime
on Darwin, the driver needs to export the additional symbols to avoid
verification failures.
Alexey Bataev [Wed, 11 Oct 2017 15:29:40 +0000 (15:29 +0000)]
[OPENMP] Fix PR34916: Crash on mixing taskloop|tasks directives.
If both taskloop and task directives are used at the same time in one
program, we may ran into the situation when the particular type for task
directive is reused for taskloop directives. Patch fixes this problem.
Adrian Prantl [Tue, 10 Oct 2017 23:54:21 +0000 (23:54 +0000)]
Include getting generated struct offsets in CodegenABITypes
This change adds a new function, CodeGen::getFieldNumber, that
enables a user of clang's code generation to get the field number
in a generated LLVM IR struct that corresponds to a particular field
in a C struct.
It is important to expose this information in Clang's code generation
interface because there is no reasonable way for users of Clang's code
generation to get this information. In particular:
LLVM struct types do not include field names.
Clang adds a non-trivial amount of logic to the code generation of LLVM IR types for structs, in particular to handle padding and bit fields.
Richard Smith [Tue, 10 Oct 2017 22:33:17 +0000 (22:33 +0000)]
[Modules TS] Module ownership semantics for redeclarations.
When declaring an entity in the "purview" of a module, it's never a
redeclaration of an entity in the purview of a default module or in no module
("in the global module"). Don't consider those other declarations as possible
redeclaration targets if they're not visible, and reject any cases where we
pick a prior visible declaration that violates this rule.
This reinstates r315251 and r315256, reverted in r315309 and r315308
respectively, tweaked to avoid triggering a linkage calculation when declaring
implicit special members (this exposed our pre-existing issue with typedef
names for linkage changing the linkage of types whose linkage has already been
computed and cached in more cases). A testcase for that regression has been
added in r315366.
Support: Have directory_iterator::status() return FindFirstFileEx/FindNextFile results on Windows.
This allows clients to avoid an unnecessary fs::status() call on each
directory entry. Because the information returned by FindFirstFileEx
is a subset of the information returned by a regular status() call,
I needed to extract a base class from file_status that contains only
that information.
On my machine, this reduces the time required to enumerate a ThinLTO
cache directory containing 520k files from almost 4 minutes to less
than 2 seconds.
But when ppc intrinsic is called to compare vectors, the ppc intrinsic can return i32 even E->getType() is BoolTy, in this case EmitScalarConversion does nothing, an i32 type result is returned and causes crash later.
This patch detects this case and truncates the result before return.
Hans Wennborg [Tue, 10 Oct 2017 16:53:25 +0000 (16:53 +0000)]
For dllexport class templates, export specializations of member functions (PR34849) (take 2)
This is a re-commit of r315025, but making sure to only apply this to
specializations of class template member functions; i.e. not when the function
itself is a template.
Artem Dergachev [Tue, 10 Oct 2017 11:55:56 +0000 (11:55 +0000)]
[analyzer] MisusedMovedObject: Fix state-resetting a base-class sub-object.
If a method is resetting the state of an object that was moved from, it should
be safe to use this object again. However if the method was defined in a parent
class, but used in a child class, the reset didn't happen from the checker's
perspective.
Ivan A. Kosarev [Tue, 10 Oct 2017 09:39:32 +0000 (09:39 +0000)]
[CodeGen] Do not construct complete LValue base info in trivial cases
Besides obvious code simplification, avoiding explicit creation
of LValueBaseInfo objects makes it easier to make TBAA
information to be part of such objects.
This is part of D38126 reworked to be a separate patch to
simplify review.
Akira Hatanaka [Tue, 10 Oct 2017 01:24:33 +0000 (01:24 +0000)]
[Sema][ObjC] Preserve syntactic sugar when removing
ARCReclaimReturnedObject cast.
This is a follow-up to r314370.
Rather than throwing away the enclosing parentheses, this commit walks
down the expression until an ARCReclaimReturnedObject cast is found and
removes just the cast, preserving the syntactic sugar expressions
(parens and casts) that were visited up to that point.
Richard Smith [Tue, 10 Oct 2017 00:49:38 +0000 (00:49 +0000)]
[Modules TS] Avoid computing the linkage of the enclosing DeclContext for a declaration in the global module.
This works around a language issue where adding a typedef name for linkage
purposes changes the linkage of an already-defined class after it becomes
complete.
Richard Smith [Mon, 9 Oct 2017 23:42:09 +0000 (23:42 +0000)]
[Modules TS] Module ownership semantics for redeclarations.
When declaring an entity in the "purview" of a module, it's never a
redeclaration of an entity in the purview of a default module or in no module
("in the global module"). Don't consider those other declarations as possible
redeclaration targets if they're not visible, and reject any cases where we
pick a prior visible declaration that violates this rule.
Driver: hoist the `wchar_t` handling to the driver
Move the logic for determining the `wchar_t` type information into the
driver. Rather than passing the single bit of information of
`-fshort-wchar` indicate to the frontend the desired type of `wchar_t`
through a new `-cc1` option of `-fwchar-type` and indicate the
signedness through `-f{,no-}signed-wchar`. This replicates the current
logic which was spread throughout Basic into the
`RenderCharacterOptions`.
Most of the changes to the tests are to ensure that the frontend uses
the correct type. Add a new test set under `test/Driver/wchar_t.c` to
ensure that we calculate the proper types for the various cases.
projects / clang / log