Summary:
- The deduced address space needs applying to its element type as well.
Reviewers: Anastasia
Subscribers: yaxunl, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D70981
This was already the intention of DelayedDllExportClasses, but code such as
this would break it:
template<typename> struct Tmpl {};
struct Outer {
struct Inner {
__declspec(dllexport) Inner() = default;
unsigned int x = 0;
};
Tmpl<Inner> y;
};
ActOnFinishCXXNonNestedClass() would get called when the instantiation of
Templ<Inner> is finished, even though the compiler is still not finished with
Outer, causing the compile fail.
This hooks into Sema::{Push,Pop}ParsingClass() to avoid calling
ActOnFinishCXXNonNestedClass() for template instantiations while a class is
being parsed.
Differential revision: https://reviews.llvm.org/D70905
This patch reapplies commit 759948467e. Patch was reverted due to a
clang-tidy test fail on Windows. The test has been modified. There
are no additional code changes.
Patch was tested with ninja check-all on Windows and Linux.
Summary of code changes:
Clang currently crashes for switch statements inside a template when the
condition is a non-integer field member because contextual implicit
conversion is skipped when parsing the condition. This conversion is
however later checked in an assert when the case statement is handled.
The conversion is skipped when parsing the condition because
the field member is set as type-dependent based on its containing class.
This patch sets the type dependency based on the field's type instead.
This patch fixes Bug 40982.
SYCL is single source offload programming model relying on compiler to
separate device code (i.e. offloaded to an accelerator) from the code
executed on the host.
Here is code example of the SYCL program to demonstrate compiler
outlining work:
```
int foo(int x) { return ++x; }
int bar(int x) { throw std::exception("CPU code only!"); }
...
using namespace cl::sycl;
queue Q;
buffer<int, 1> a(range<1>{1024});
Q.submit([&](handler& cgh) {
auto A = a.get_access<access::mode::write>(cgh);
cgh.parallel_for<init_a>(range<1>{1024}, [=](id<1> index) {
A[index] = index[0] + foo(42);
});
}
...
```
SYCL device compiler must compile lambda expression passed to
cl::sycl::handler::parallel_for method and function foo called from this
lambda expression for an "accelerator". SYCL device compiler also must
ignore bar function as it's not required for offloaded code execution.
This patch adds the sycl_kernel attribute, which is used to mark code
passed to cl::sycl::handler::parallel_for as "accelerated code".
Attribute must be applied to function templates which parameters include
at least "kernel name" and "kernel function object". These parameters
will be used to establish an ABI between the host application and
offloaded part.
Reviewers: jlebar, keryell, Naghasan, ABataev, Anastasia, bader, aaron.ballman, rjmccall, rsmith
Reviewed By: keryell, bader
Subscribers: mgorny, OlegM, ArturGainullin, agozillon, aaron.ballman, ebevhan, Anastasia, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D60455
Signed-off-by: Alexey Bader <alexey.bader@intel.com>
Since lambdas are represented by callable objects, we add
generic addr space for implicit object parameter in call
operator.
Any lambda variable declared in __constant addr space
(which is not convertible to generic) fails to compile with
a diagnostic. To support constant addr space we need to
add a way to qualify the lambda call operators.
Tags: #clang
Differential Revision: https://reviews.llvm.org/D69938
Commit 9a8d477a0e ("[OpenCL] Add builtin function attribute
handling", 2019-11-05) stopped Clang from mangling single-overload
builtins, which is incorrect.
Clang was creating a DerivedToBase ImplicitCastExpr that was also
casting between address spaces as part of the second step in the
standard conversion sequence. Defer the address space conversion to
the third step in the sequence instead, such that we get a separate
ImplicitCastExpr for the address space conversion.
Differential Revision: https://reviews.llvm.org/D70605
Now Clang does not check that features required by built-in functions
are enabled. That causes errors in the backend reported in PR44018.
This patch fixes this bug by checking that required features
are enabled.
This should fix PR44018.
Differential Revision: https://reviews.llvm.org/D70808
References need somewhat special treatment. While copying a gsl::Pointer
will propagate the points-to set, creating an object from a reference
often behaves more like a dereference operation.
Differential Revision: https://reviews.llvm.org/D70755
According to OpenMP 5.0, if clause can be used in parallel for simd directive. If condition in the if clause if false, the non-vectorized version of the
loop must be executed.
In order to simplify implementation we are moving add space
deduction into Sema while constructing variable declaration
and on template instantiation. Pointee are deduced to generic
addr space during creation of types.
This commit also
- fixed addr space dedution for auto type;
- factors out in a separate helper function OpenCL specific
logic from type diagnostics in var decl.
Tags: #clang
Differential Revision: https://reviews.llvm.org/D65744
Need to perform the instantiation of the combiner/initializer even if
the resulting type is not dependent, if the construct is defined in
templates in some cases.
Summary:
As noted in PR, we have a poor test coverage for this warning. I think macro support was just overlooked. GCC warns in these cases.
Clang missed a real bug in the code I am working with, GCC caught it.
Reviewers: aaron.ballman
Reviewed By: aaron.ballman
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D70624
This avoids the need to include Attr.h in DeclCXX.h for a four-value
enum. Removing the include will be done separately, since it is large
and risky change.
Summary:
GCC 9 added -Wdeprecated-copy (as part of -Wextra). This diagnostic is already implemented in Clang too, just hidden under -Wdeprecated (not on by default).
This patch adds -Wdeprecated-copy and makes it compatible with GCC 9+.
This diagnostic is heavily tested in deprecated.cpp, so I added simple tests just to check we warn when new flag/-Wextra is enabled.
Reviewers: rsmith, dblaikie
Reviewed By: dblaikie
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D70342
This fixes an assertion in Sema::CreateBuiltinBinOp that fails when one
of the vector operand's element type is a typedef of __fp16.
rdar://problem/55983556
Summary:
A user may want to use freestanding mode with the standard "main" entry
point. It's not useful to warn about a missing prototype as it's not
typical to have a prototype for "main".
Reviewers: efriedma, aaron.ballman
Reviewed By: aaron.ballman
Subscribers: aaron.ballman, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D70588
Summary:
The assertion of CoroutineParameterMoves happens when build coroutine function with arguments multiple time while fails to build promise type.
Fix: use return false instead.
Test Plan: check-clang
Reviewers: modocache, GorNishanov, rjmccall
Reviewed By: modocache
Subscribers: rjmccall, EricWF, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D69022
Patch by junparser (JunMa)!
The original bug report can be found
[here](https://github.com/clangd/clangd/issues/85)
Given the following code:
```c++
void function() {
auto Lambda = [](int a, double &b) {return 1.f;};
La^
}
```
Triggering the completion at `^` would show `(lambda)` before this patch
and would show signature `(int a, double &b) const`, build a snippet etc
with this patch.
Reviewers: sammccall
Reviewed by: sammccall
Differential revision: https://reviews.llvm.org/D70445
directives.
If the default datasharing is set to none, the datasharing attributes
for variables in the condition of the if clause for the inner taskloop
directive must be verified.
According to OpenMP 5.0, if clause can be used in for simd directive. If
condition in the if clause if false, the non-vectorized version of the
loop must be executed.
Partial revert of r372681 "Support for DWARF-5 C++ language tags".
The change introduced new external linkage languages ("C++11" and
"C++14") which not supported in C++.
It also changed the definition of the existing enum to use the DWARF
constants. The problem is that "LinkageSpecDeclBits.Language" (the field
that reserves this enum) is actually defined as 3 bits length
(bitfield), which cannot contain the new DWARF constants. Defining the
enum as integer literals is more appropriate for maintaining valid
values.
Differential Revision: https://reviews.llvm.org/D69935
Clang was creating an UncheckedDerivedToBase ImplicitCastExpr that was
also casting between address spaces. Insert an ImplicitCastExpr node
for doing the address space conversion.
Differential Revision: https://reviews.llvm.org/D69810
We seem to have been gradually growing support for atomic min/max operations
(exposing longstanding IR atomicrmw instructions). But until now there have
been gaps in the expected intrinsics. This adds support for the C11-style
intrinsics (i.e. taking _Atomic, rather than individually blessed by C11
standard), and the variants that return the new value instead of the original
one.
That way, people won't be misled by trying one form and it not working, and the
front-end is more friendly to people using _Atomic types, as we recommend.
Some clients of this function want to know about any expression that is known
to produce a 0/1 value, and others care about expressions that are semantically
boolean.
This fixes a -Wswitch-bool regression I introduced in 8bfb353bb3, pointed out
by Chris Hamilton!
According to OpenMP 5.0, if clause can be used in simd directive. If
condition in the if clause if false, the non-vectorized version of the
loop must be executed.
Currently, clang emits subprograms for declared functions when the
target debugger or DWARF standard is known to support entry values
(DW_OP_entry_value & the GNU equivalent).
Treat DW_AT_tail_call the same way to allow debuggers to follow cross-TU
tail calls.
Pre-patch debug session with a cross-TU tail call:
```
* frame #0: 0x0000000100000fa4 main`target at b.c:4:3 [opt]
frame #1: 0x0000000100000f99 main`main at a.c:8:10 [opt]
```
Post-patch (note that the tail-calling frame, "helper", is visible):
```
* frame #0: 0x0000000100000fa4 main`target at b.c:4:3 [opt]
frame #1: 0x0000000100000f80 main`helper [opt] [artificial]
frame #2: 0x0000000100000f99 main`main at a.c:8:10 [opt]
```
This was reverted in 5b9a072c because it attached declaration
subprograms to inlinable builtin calls, which interacted badly with the
MergeICmps pass. The fix is to not attach declarations to builtins.
rdar://46577651
Differential Revision: https://reviews.llvm.org/D69743
It turns out that the debug info describing the Sema class is an
appreciable percentage of the total object file size of objects in Sema.
By adding a key function, clang is able to optimize the debug info size
by emitting a forward declaration in TUs that do not define the key
function.
On Windows, with clang-cl, these are the total sizes of object files in
Sema before and after this change, compiling with optimizations and
debug info:
before: 335,012 KB
after: 278,116 KB
delta: -56,896 KB
percent: -17.0%
The effect on link time was negligible, despite having ~56MB less input.
On Linux, with clang, these are the same sizes using DWARF -g and
optimizations:
before: 603,756 KB
after: 515,340 KB
delta: -88,416 KB
percent: -14.6%
I didn't use type units, DWARF-5, fission, or any other special flags.
Reviewed By: thakis
Differential Revision: https://reviews.llvm.org/D70340
__attribute__((objc_direct)) is an attribute on methods declaration, and
__attribute__((objc_direct_members)) on implementation, categories or
extensions.
A `direct` property specifier is added (@property(direct) type name)
These attributes / specifiers cause the method to have no associated
Objective-C metadata (for the property or the method itself), and the
calling convention to be a direct C function call.
The symbol for the method has enforced hidden visibility and such direct
calls are hence unreachable cross image. An explicit C function must be
made if so desired to wrap them.
The implicit `self` and `_cmd` arguments are preserved, however to
maintain compatibility with the usual `objc_msgSend` semantics,
3 fundamental precautions are taken:
1) for instance methods, `self` is nil-checked. On arm64 backends this
typically adds a single instruction (cbz x0, <closest-ret>) to the
codegen, for the vast majority of the cases when the return type is a
scalar.
2) for class methods, because the class may not be realized/initialized
yet, a call to `[self self]` is emitted. When the proper deployment
target is used, this is optimized to `objc_opt_self(self)`.
However, long term we might want to emit something better that the
optimizer can reason about. When inlining kicks in, these calls
aren't optimized away as the optimizer has no idea that a single call
is really necessary.
3) the calling convention for the `_cmd` argument is changed: the caller
leaves the second argument to the call undefined, and the selector is
loaded inside the body when it's referenced only.
As far as error reporting goes, the compiler refuses:
- making any overloads direct,
- making an overload of a direct method,
- implementations marked as direct when the declaration in the
interface isn't (the other way around is allowed, as the direct
attribute is inherited from the declaration),
- marking methods required for protocol conformance as direct,
- messaging an unqualified `id` with a direct method,
- forming any @selector() expression with only direct selectors.
As warnings:
- any inconsistency of direct-related calling convention when
@selector() or messaging is used,
- forming any @selector() expression with a possibly direct selector.
Lastly an `objc_direct_members` attribute is added that can decorate
`@implementation` blocks and causes methods only declared there (and in
no `@interface`) to be automatically direct. When decorating an
`@interface` then all methods and properties declared in this block are
marked direct.
Radar-ID: rdar://problem/2684889
Differential Revision: https://reviews.llvm.org/D69991
Reviewed-By: John McCall
Without this fix, the tests introduced here produce the following
assert fail:
```
clang: /home/jdenny/llvm/clang/include/clang/Basic/AttributeCommonInfo.h:163: unsigned int clang::AttributeCommonInfo::getAttributeSpellingListIndex() const: Assertion `(isAttributeSpellingListCalculated() || AttrName) && "Spelling cannot be found"' failed.
```
The bug was introduced by D67368, which caused `AsmLabelAttr`'s
spelling index to be set to `SpellingNotCalculated`.
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D70349
Provides support for using r6-r11 as globally scoped
register variables. This requires a -ffixed-rN flag
in order to reserve rN against general allocation.
If for a given GRV declaration the corresponding flag
is not found, or the the register in question is the
target's FP, we fail with a diagnostic.
Differential Revision: https://reviews.llvm.org/D68862
cchen