We don't yet advertise init capture packs, because I found some bugs
while testing it. We reject-valid and then crash on both of these:
template<int ...a> auto x = [...y = a] {};
template<int ...a> auto x = [y = a...] {};
This reapplies: 8ff85ed905
Original commit message:
As a follow-up to my initial mail to llvm-dev here's a first pass at the O1 described there.
This change doesn't include any change to move from selection dag to fast isel
and that will come with other numbers that should help inform that decision.
There also haven't been any real debuggability studies with this pipeline yet,
this is just the initial start done so that people could see it and we could start
tweaking after.
Test updates: Outside of the newpm tests most of the updates are coming from either
optimization passes not run anymore (and without a compelling argument at the moment)
that were largely used for canonicalization in clang.
Original post:
http://lists.llvm.org/pipermail/llvm-dev/2019-April/131494.html
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65410
This reverts commit c9ddb02659.
This change doesn't include any change to move from selection dag to fast isel
and that will come with other numbers that should help inform that decision.
There also haven't been any real debuggability studies with this pipeline yet,
this is just the initial start done so that people could see it and we could start
tweaking after.
Test updates: Outside of the newpm tests most of the updates are coming from either
optimization passes not run anymore (and without a compelling argument at the moment)
that were largely used for canonicalization in clang.
Original post:
http://lists.llvm.org/pipermail/llvm-dev/2019-April/131494.html
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65410
Add a 'leak_sanitizer' feature akin to existing '*_sanitizer' features
to let programmers switch code paths accounting for leak sanitizers
being enabled.
Differential Revision: https://reviews.llvm.org/D67719
llvm-svn: 372527
This is mostly the same as the
[[clang::require_constant_initialization]] attribute, but has a couple
of additional syntactic and semantic restrictions.
In passing, I added a warning for the attribute form being added after
we have already seen the initialization of the variable (but before we
see the definition); that case previously slipped between the cracks and
the attribute was silently ignored.
llvm-svn: 370972
It was added in r370129 with a .gitattributes file that means the file
always shows up as having a local diff in Git checkouts (at least on
Linux). Deleting it until we can figure out the right way to do this.
llvm-svn: 370175
Previously, an #error directive with quoted, multi-line content, along with CR+LF line endings wasn't handled correctly.
Differential Revision: https://reviews.llvm.org/D66556
llvm-svn: 370129
This reverts commit r369986.
This change added a dependency on the 'dos2unix' tool, which is not one
of our accepted test dependencies and may not exist on all machines that
build Clang.
llvm-svn: 370000
Previously, an #error directive with quoted, multi-line content, along with CR+LF line endings wasn't handled correctly.
Differential Revision: https://reviews.llvm.org/D66556
llvm-svn: 369986
Add "memtag" sanitizer that detects and mitigates stack memory issues
using armv8.5 Memory Tagging Extension.
It is similar in principle to HWASan, which is a software implementation
of the same idea, but there are enough differencies to warrant a new
sanitizer type IMHO. It is also expected to have very different
performance properties.
The new sanitizer does not have a runtime library (it may grow one
later, along with a "debugging" mode). Similar to SafeStack and
StackProtector, the instrumentation pass (in a follow up change) will be
inserted in all cases, but will only affect functions marked with the
new sanitize_memtag attribute.
Reviewers: pcc, hctim, vitalybuka, ostannard
Subscribers: srhines, mehdi_amini, javed.absar, kristof.beyls, hiraditya, cryptoad, steven_wu, dexonsmith, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D64169
llvm-svn: 366123
that might affect the dependency list for a compilation
This commit introduces a dependency directives source minimizer to clang
that minimizes header and source files to the minimum necessary preprocessor
directives for evaluating includes. It reduces the source down to #define, #include,
The source minimizer works by lexing the input with a custom fast lexer that recognizes
the preprocessor directives it cares about, and emitting those directives in the minimized source.
It ignores source code, comments, and normalizes whitespace. It gives up and fails if seems
any directives that it doesn't recognize as valid (e.g. #define 0).
In addition to the source minimizer this patch adds a
-print-dependency-directives-minimized-source CC1 option that allows you to invoke the minimizer
from clang directly.
Differential Revision: https://reviews.llvm.org/D55463
llvm-svn: 362459
tokens.
We now actually form an angled_string_literal token for a header name by
concatenation rather than just working out what its contents would be.
This substantially simplifies downstream processing and is necessary for
C++20 header unit imports.
llvm-svn: 356433
It hasn't seen active development in years, and it hasn't reached a
state where it was useful.
Remove the code until someone is interested in working on it again.
Differential Revision: https://reviews.llvm.org/D59133
llvm-svn: 355862
Summary:
The main effect is that clang now accepts the following conforming C11
code with MSVC headers:
#include <assert.h>
static_assert(1, "true");
This is a non-conforming extension (the keyword is outside the
implementer's namespace), so it is placed under -fms-compatibility
instead of -fms-extensions like most MSVC-specific keyword extensions.
Normally, in C11, the compiler is supposed to provide the _Static_assert
keyword, and assert.h should define static_assert to _Static_assert.
However, that is not what MSVC does, and MSVC doesn't even provide
_Static_assert.
This also has the less important side effect of enabling static_assert
in C++98 mode with -fms-compatibility. It's exceptionally difficult to
use modern MSVC headers without C++14 even, so this is relatively
unimportant.
Fixes PR26672
Patch by Andrey Bokhanko!
Reviewers: rsmith, thakis
Subscribers: cfe-commits, STL_MSFT
Differential Revision: https://reviews.llvm.org/D17444
llvm-svn: 354162
When Clang/LLVM is built with the CLANG_DEFAULT_STD_CXX CMake macro that sets
the default standard to something other than C++14, there are a number of lit
tests that fail as they rely on the C++14 default.
This patch just adds the language standard option explicitly to such test cases.
Differential revision: https://reviews.llvm.org/D57581
llvm-svn: 353163
As Discussed here:
http://lists.llvm.org/pipermail/llvm-dev/2019-January/129543.html
There are problems exposing the _Float16 type on architectures that
haven't defined the ABI/ISel for the type yet, so we're temporarily
disabling the type and making it opt-in.
Differential Revision: https://reviews.llvm.org/D57188
Change-Id: I5db7366dedf1deb9485adb8948b1deb7e612a736
llvm-svn: 352221
Summary:
P1353R0, adopted in San Diego, specified an implementation feature test macro for destroying delete (P0722R3).
The implementation of the feature (https://reviews.llvm.org/rL315662) is not guarded behind a flag, so the macro is not conditional on language version.
Reviewers: rsmith
Reviewed By: rsmith
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D55741
llvm-svn: 350934
This unfortunately results in a substantial breaking change when
switching to C++20, but it's not yet clear what / how much we should
do about that. We may want to add a compatibility conversion from
u8 string literals to const char*, similar to how C++98 provided a
compatibility conversion from string literals to non-const char*,
but that's not handled by this patch.
The feature can be disabled in C++20 mode with -fno-char8_t.
llvm-svn: 346892
This can be used to detect whether the code is being built with UBSan using
the __has_feature(undefined_behavior_sanitizer) predicate.
Differential Revision: https://reviews.llvm.org/D52386
llvm-svn: 342793
This can be used to detect whether the code is being built with XRay
instrumentation using the __has_feature(xray_instrument) predicate.
Differential Revision: https://reviews.llvm.org/D52159
llvm-svn: 342358
Boilerplate code for using KMSAN instrumentation in Clang.
We add a new command line flag, -fsanitize=kernel-memory, with a
corresponding SanitizerKind::KernelMemory, which, along with
SanitizerKind::Memory, maps to the memory_sanitizer feature.
KMSAN is only supported on x86_64 Linux.
It's incompatible with other sanitizers, but supports code coverage
instrumentation.
llvm-svn: 341641
Changes the default Windows target triple returned by
GetHostTriple.cmake from the old environment names (which we wanted to
move away from) to newer, normalized ones. This also requires updating
all tests to use the new systems names in constraints.
Differential Revision: https://reviews.llvm.org/D47381
llvm-svn: 339307
Libc++ needs to know when aligned allocation is supported by clang, but is
otherwise unavailable at link time. Otherwise, libc++ will incorrectly end up
generating calls to `__builtin_operator_new`/`__builtin_operator_delete` with
alignment arguments.
This patch implements the following changes:
* The `__cpp_aligned_new` feature test macro to no longer be defined when
aligned allocation is otherwise enabled but unavailable.
* The Darwin driver no longer passes `-faligned-alloc-unavailable` when the
user manually specifies `-faligned-allocation` or `-fno-aligned-allocation`.
* Instead of a warning Clang now generates a hard error when an aligned
allocation or deallocation function is referenced but unavailable.
Patch by Eric Fiselier.
Reviewers: rsmith, vsapsai, erik.pilkington, ahatanak, dexonsmith
Reviewed By: rsmith
Subscribers: Quuxplusone, cfe-commits
Differential Revision: https://reviews.llvm.org/D45015
llvm-svn: 338934
Summary: Add a flag `-fno-digraphs` to disable digraphs in the lexer, similar to `-fno-operator-names` which disables alternative names for C++ operators.
Reviewers: rsmith
Reviewed By: rsmith
Subscribers: rsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D48266
llvm-svn: 337232
This is not yet part of any C++ working draft, and so is controlled by the flag
-fchar8_t rather than a -std= flag. (The GCC implementation is controlled by a
flag with the same name.)
This implementation is experimental, and will be removed or revised
substantially to match the proposal as it makes its way through the C++
committee.
llvm-svn: 331244
ARC mode.
Declaring __strong pointer fields in structs was not allowed in
Objective-C ARC until now because that would make the struct non-trivial
to default-initialize, copy/move, and destroy, which is not something C
was designed to do. This patch lifts that restriction.
Special functions for non-trivial C structs are synthesized that are
needed to default-initialize, copy/move, and destroy the structs and
manage the ownership of the objects the __strong pointer fields point
to. Non-trivial structs passed to functions are destructed in the callee
function.
rdar://problem/33599681
Differential Revision: https://reviews.llvm.org/D41228
llvm-svn: 326307
For input `0'e+1` lexer tokenized as numeric constant only `0'e`. Later
NumericLiteralParser skipped 0 and ' as digits and parsed `e+1` as valid
exponent going past the end of the token. Because it didn't mark numeric
literal as having an error, it continued parsing and tried to expandUCNs
with StringRef of length -2.
The fix is not to parse exponent when we reached the end of token.
Discovered by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4588
rdar://problem/36076719
Reviewers: rsmith, t.p.northover
Reviewed By: rsmith
Subscribers: cfe-commits, jkorous-apple
Differential Revision: https://reviews.llvm.org/D41834
llvm-svn: 324419
Fix makes the loop in LexAngledStringLiteral more like the loops in
LexStringLiteral, LexCharConstant. When we skip a character after
backslash, we need to check if we reached the end of the file instead of
reading the next character unconditionally.
Discovered by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3832
rdar://problem/35572754
Reviewers: arphaman, kcc, rsmith, dexonsmith
Reviewed By: rsmith, dexonsmith
Subscribers: cfe-commits, rsmith, dexonsmith
Differential Revision: https://reviews.llvm.org/D41423
llvm-svn: 322390
Specifically, warn if:
* we find a character that the language standard says we must treat as an
identifier, and
* that character is not reasonably an identifier character (it's a punctuation
character or similar), and
* it renders identically to a valid non-identifier character in common
fixed-width fonts.
Some tools "helpfully" substitute the surprising characters for the expected
characters, and replacing semicolons with Greek question marks is a common
"prank".
llvm-svn: 320697
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.
llvm-svn: 315126
This is a recommit of r312781; in some build configurations
variable names are omitted, so changed the new regression
test accordingly.
llvm-svn: 312794
Richard Smith