Erich Keane [Fri, 31 May 2019 15:56:27 +0000 (15:56 +0000)]
Suppress nothrow/exception spec conflict warning when ES is parsed.
The previously added warning ended up causing false positives when
nothrow was used on member functions, where the exception specification
wasn't yet parsed. So, throw() and noexcept(true) both were incorrectly
warning. There doesn't seem to be a good way to force these to be parsed
to identify which they are (and likely should not be), so suppress the warning.
For now, unevaluated/uninstantiated are left as warnings as I am not
creative enough to find a reproducer that causes a false positive for
either.
Erich Keane [Fri, 31 May 2019 14:26:19 +0000 (14:26 +0000)]
Fix for PR42089, regression from r362119
The implementation of the NoThrow ExceptionSpecificationType missed a
switch statement for forming the diagnostic when an out-of-line member
redeclaration misses the exception specification. This patch adds the
correct case statement.
Zi Xuan Wu [Fri, 31 May 2019 04:42:13 +0000 (04:42 +0000)]
re-commit r361928: [PowerPC] [Clang] Port SSE intrinsics to PowerPC
Port xmmintrin.h which include Intel SSE intrinsics implementation to PowerPC platform (using Altivec).
The new headers containing those implemenations are located into a directory named ppc_wrappers
which has higher priority when the platform is PowerPC on Linux. They are mainly developed by Steven Munroe,
with contributions from Paul Clarke, Bill Schmidt, Jinsong Ji and Zixuan Wu.
Patched by: Qiu Chaofan <qiucf@cn.ibm.com>
Reviewed By: Jinsong Ji
Petr Hosek [Fri, 31 May 2019 01:34:51 +0000 (01:34 +0000)]
[CMake] Provide an option to use relative paths in debug info
CMake always uses absolute file paths in the generated compiler
invocation which results in absolute file paths being embedded in debug
info. This is undesirable when building a toolchain e.g. on bots as the
debug info may embed the bot source checkout path which is meaningless
anywhere else.
This change introduces the LLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO which uses
-fdebug-prefix-map (where supported) options to rewrite paths embedded
into debug info with relative ones. Additionally, LLVM_SOURCE_PREFIX can
be used to override the path to source directory with a different one.
Richard Smith [Fri, 31 May 2019 01:25:16 +0000 (01:25 +0000)]
PR39728: When completing a class, complete the destructor first.
We need to know whether the destructor is trivial in order to tell
whether other parts of the class are valid (in particular, this affects
whether the type is a literal type, which affects whether defaulted
special members can be declared constexpr or are implicitly constexpr).
John McCall [Fri, 31 May 2019 01:21:36 +0000 (01:21 +0000)]
Fix the predefined exponent limit macros for the 16-bit IEEE format.
The magnitude range of normalized _Float16 is 2^-14 (~6e-5) to
(2-2^-10)*2^15 (65504). You might think, then, that the code is
correct to defne FLT16_MIN_EXP and FLT16_MAX_EXP to be -14 and 15
respectively. However, for some reason the C specification actually
specifies a bias for these macros:
C11 5.2.4.2.2:
- minimum negative integer such that FLT_RADIX raised to one less than
that power is a normalized floating-point number, e_min:
FLT_MIN_EXP
DBL_MIN_EXP
LDBL_MIN_EXP
- maximum integer such that FLT_RADIX raised to one less than that
power is a representable finite floating-point number, e_max:
FLT_MAX_EXP
DBL_MAX_EXP
LDBL_MAX_EXP
FLT16_MIN_EXP and FLT16_MAX_EXP should clearly be biased the same way,
and other compilers do in fact do so, as do our OpenCL headers for `half`.
Richard Smith [Fri, 31 May 2019 01:17:04 +0000 (01:17 +0000)]
Defer building 'this' captures until we have left the capturing region
and returned to the context in which 'this' should be captured.
This means we now always mark 'this' referenced from the context in
which it's actually referenced, rather than potentially from some
context nested within that.
Richard Smith [Fri, 31 May 2019 00:45:10 +0000 (00:45 +0000)]
Defer capture initialization for captured regions until after we've left
the captured region scope.
This removes a case where we would build expressions (and mark
declarations odr-used) in the wrong scope.
Remove the now-unused 'capture initializer' field on sema::Capture
(except for 'this' captures, which still need to be cleaned up).
No functionality change intended (except that we now very slightly more
precisely determine whether we need to use a capture or not when another
captured region encloses an OpenMP captured region).
Richard Smith [Thu, 30 May 2019 23:21:14 +0000 (23:21 +0000)]
Refactor OpenMP stack management.
Instead of duplicating access to the directive stack throughout
SemaOpenMP.cpp, consolidate it to a few methods and call those
everywhere else. In passing, simplify adjacent code where possible.
[Remarks][NFC] Move the serialization to lib/Remarks
Separate the remark serialization to YAML from the LLVM Diagnostics.
This adds a new serialization abstraction: remarks::Serializer. It's
completely independent from lib/IR and it provides an easy way to
replace YAML by providing a new remarks::Serializer.
Erich Keane [Thu, 30 May 2019 21:35:32 +0000 (21:35 +0000)]
Fix constexpr __builtin_*_overflow issue when unsigned->signed operand.
As reported here https://bugs.llvm.org/show_bug.cgi?id=42000, it was
possible to get the constexpr version of __builtin_*_overflow to give
the wrong answer.
This was because when extending the operands to fit the largest type (so
that the math could be done), the decision on whether to sign/zero
extend the operands was based on the result signedness, not on the
operands signedness.
In the reported case, (unsigned char)255 - (int)100 needed
to have each extended to the int in order to do the math. However, when
extending the first operand to 'int', we incorrectly sign extended it
instead of zero extending. Thus, the result didnt fit back into the
unsigned char.
The fix for this was simply to choose zero/sign extension based on the
sign of the operand itself.
Richard Smith [Thu, 30 May 2019 20:45:12 +0000 (20:45 +0000)]
[c++2a] Fix assertion failure if we would walk over more than one level
of derived-to-base conversion path when implicitly starting union
subobject lifetimes in constant evaluation.
Mitch Phillips [Thu, 30 May 2019 19:45:32 +0000 (19:45 +0000)]
[GWP-ASan] Mutex implementation [2].
Summary:
See D60593 for further information.
This patch pulls out the mutex implementation and the required definitions file.
We implement our own mutex for GWP-ASan currently, because:
1. We must be compatible with the sum of the most restrictive elements of the supporting allocator's build system. Current targets for GWP-ASan include Scudo (on Linux and Fuchsia), and bionic (on Android).
2. Scudo specifies `-nostdlib++ -nonodefaultlibs`, meaning we can't use `std::mutex` or `mtx_t`.
3. We can't use `sanitizer_common`'s mutex, as the supporting allocators cannot afford the extra maintenance (Android, Fuchsia) and code size (Fuchsia) overheads that this would incur.
In future, we would like to implement a shared base mutex for GWP-ASan, Scudo and sanitizer_common. This will likely happen when both GWP-ASan and Scudo standalone are not in the development phase, at which point they will have stable requirements.
Tim Northover [Thu, 30 May 2019 18:49:19 +0000 (18:49 +0000)]
Reapply: LLVM IR: update Clang tests for byval being a typed attribute.
Since byval is now a typed attribute it gets sorted slightly differently by
LLVM when the order of attributes is being canonicalized. This updates the few
Clang tests that depend on the old order.
Erich Keane [Thu, 30 May 2019 17:31:54 +0000 (17:31 +0000)]
Add Attribute NoThrow as an Exception Specifier Type
In response to https://bugs.llvm.org/show_bug.cgi?id=33235, it became
clear that the current mechanism of hacking through checks for the
exception specification of a function gets confused really quickly when
there are alternate exception specifiers.
This patch introcues EST_NoThrow, which is the equivilent of
EST_noexcept when caused by EST_noThrow. The existing implementation is
left in place to cover functions with no FunctionProtoType.
J. Ryan Stinnett [Thu, 30 May 2019 16:46:22 +0000 (16:46 +0000)]
[Docs] Modernize references to macOS
Summary:
This updates all places in documentation that refer to "Mac OS X", "OS X", etc.
to instead use the modern name "macOS" when no specific version number is
mentioned.
If a specific version is mentioned, this attempts to use the OS name at the time
of that version:
* Mac OS X for 10.0 - 10.7
* OS X for 10.8 - 10.11
* macOS for 10.12 - present
Summary:
Printing out a map structure different in different environments so that
this patch generalize the test-case to check for the 'no stmt'-case
anywhere in the Store.
Sjoerd Meijer [Thu, 30 May 2019 14:22:26 +0000 (14:22 +0000)]
[ARM] Add CLI support for Armv8.1-M and MVE
Given the existing infrastructure in LLVM side for +fp and +fp.dp,
this is more or less trivial, needing only one tiny source change and
a couple of tests.
Fangrui Song [Thu, 30 May 2019 08:03:02 +0000 (08:03 +0000)]
asm goto: fix out-of-bounds read of Constraints after rC362045
When parsing goto labels, Names and Exprs are expanded but Constraints
is not, this may cause a out-of-bounds read later in:
// GCCAsmStmt::GCCAsmStmt
// `constraints` has only `NumExprs - NumLabels` elements
Constraints = new (C) StringLiteral*[NumExprs];
std::copy(constraints, constraints + NumExprs, Constraints);
John McCall [Thu, 30 May 2019 04:09:01 +0000 (04:09 +0000)]
Add the `objc_class_stub` attribute.
Swift requires certain classes to be not just initialized lazily on first
use, but actually allocated lazily using information that is only available
at runtime. This is incompatible with ObjC class initialization, or at least
not efficiently compatible, because there is no meaningful class symbol
that can be put in a class-ref variable at load time. This leaves ObjC
code unable to access such classes, which is undesirable.
objc_class_stub says that class references should be resolved by calling
a new ObjC runtime function with a pointer to a new "class stub" structure.
Non-ObjC compilers (like Swift) can simply emit this structure when ObjC
interop is required for a class that cannot be statically allocated,
then apply this attribute to the `@interface` in the generated ObjC header
for the class.
This attribute can be thought of as a generalization of the existing
`objc_runtime_visible` attribute which permits more efficient class
resolution as well as supporting the additon of categories to the class.
Subclassing these classes from ObjC is currently not allowed.
Fangrui Song [Thu, 30 May 2019 02:30:04 +0000 (02:30 +0000)]
[Driver] Render target options (e.g. -fuse-init-array) for -fembed-bitcode
Modern ELF platforms use -fuse-init-array to emit .init_array instead of
.ctors . ld.bfd and gold --ctors-in-init-array merge .init_array and
.ctors into .init_array but lld doesn't do that.
If crtbegin*.o crtend*.o don't provide .ctors/.dtors, such .ctors in
user object files can lead to crash (see PR42002. The first and the last
elements in .ctors/.dtors are ignored - they are traditionally provided
by crtbegin*.o crtend*.o).
Call addClangTargetOptions() to ensure -fuse-init-array is rendered on
modern ELF platforms. On Hexagon, this renders -target-feature
+reserved-r19 for -ffixed-r19.
This commit removes the code that was there to make clang compatible
with gcc and make clang emit the correct encoding for ObjC pointers,
which is "@".
Summary:
This new piece is similar to our macro expansion printing in HTML reports:
On mouse-hover event it pops up on variables. Similar to note pieces it
supports `plist` diagnostics as well.
It is optional, on by default: `add-pop-up-notes=true`.
Extra: In HTML reports `background-color: LemonChiffon` was too light,
changed to `PaleGoldenRod`.
Tim Northover [Wed, 29 May 2019 19:13:29 +0000 (19:13 +0000)]
LLVM IR: update Clang tests for byval being a typed attribute.
Since byval is now a typed attribute it gets sorted slightly differently by
LLVM when the order of attributes is being canonicalized. This updates the few
Clang tests that depend on the old order.
Michael Liao [Wed, 29 May 2019 17:23:27 +0000 (17:23 +0000)]
[CUDA][HIP] Skip setting `externally_initialized` for static device variables.
Summary:
- By declaring device variables as `static`, we assume they won't be
addressable from the host side. Thus, no `externally_initialized` is
required.
Francois Ferrand [Wed, 29 May 2019 16:30:47 +0000 (16:30 +0000)]
[clang-format] Allow configuring list of function-like macros that resolve to a type
Summary:
Adds a `TypenameMacros` configuration option that causes certain identifiers to be handled in a way similar to `typeof()`.
This is enough to:
- Prevent misinterpreting declarations of pointers to such types as expressions (`STACK_OF(int) * foo` -> `STACK_OF(int) *foo`),
- Avoid surprising line breaks in variable/struct field declarations (`STACK_OF(int)\nfoo;` -> `STACK_OF(int) foo;`, see https://bugs.llvm.org/show_bug.cgi?id=30353).
Simon Atanasyan [Wed, 29 May 2019 14:59:32 +0000 (14:59 +0000)]
[mips] Check argument for __builtin_msa_ctcmsa / __builtin_msa_cfcmsa
The `__builtin_msa_ctcmsa` and `__builtin_msa_cfcmsa` builtins are mapped
to the `ctcmsa` and `cfcmsa` instructions respectively. While MSA
control registers have indexes in 0..7 range, the instructions accept
register index in 0..31 range [1].
[1] MIPS Architecture for Programmers Volume IV-j:
The MIPS64 SIMD Architecture Module
https://www.mips.com/?do-download=the-mips64-simd-architecture-module
Nico Weber [Wed, 29 May 2019 13:48:19 +0000 (13:48 +0000)]
clang-cl: Fix mangling of catchable types with names longer than 4kiB
The mangling used to contain the MD5 name of both the RTTI type
descriptor and the name of the copy ctor in MSVC2013, but it changed
to just the former in 2015. It looks like it changed back to the old
mangling in VS2017 version 15.7 and onwards, including VS2019 (version
16.0). VS2017 version 15.0 still has the VS2015 mangling. Versions
between 15.0 and 15.7 are't on godbolt. I found 15.4 (_MSC_VER 1911)
locally and that uses the 15.0 mangling still, but I didn't find 15.5 or
15.6, so I'm not sure where exactly it changed back.
[LibTooling] Add `before` and `after` selectors for selecting point-ranges relative to nodes.
Summary:
The `before` and `after` selectors allow users to specify a zero-length range --
a point -- at the relevant location in an AST-node's source. Point ranges can
be useful, for example, to insert a change using an API that takes a range to be
modified (e.g. `tooling::change()`).
Pengfei Wang [Wed, 29 May 2019 08:42:35 +0000 (08:42 +0000)]
[X86] Fix i386 struct and union parameter alignment
According to i386 System V ABI 2.1: Structures and unions assume the
alignment of their most strictly aligned component. But current
implementation always takes them as 4-byte aligned which will result
in incorrect code, e.g:
The first call (line 10) takes the second arg as 4-byte aligned while
the second call (line 11) takes the second arg as 16-byte aligned.
There is oxymoron for the alignment of the 2 calls because they should
be the same.
This patch fixes the bug by following i386 System V ABI and apply it to
Linux only since other System V OS (e.g Darwin, PS4 and FreeBSD) don't
want to spend any effort dealing with the ramifications of ABI breaks
at present.
Zi Xuan Wu [Wed, 29 May 2019 05:17:03 +0000 (05:17 +0000)]
[PowerPC] [Clang] Port SSE intrinsics to PowerPC
Port xmmintrin.h which include Intel SSE intrinsics implementation to PowerPC platform (using Altivec).
The new headers containing those implemenations are located into a directory named ppc_wrappers
which has higher priority when the platform is PowerPC on Linux. They are mainly developed by Steven Munroe,
with contributions from Paul Clarke, Bill Schmidt, Jinsong Ji and Zixuan Wu.
Patched by: Qiu Chaofan <qiucf@cn.ibm.com>
Reviewed By: Jinsong Ji
Petr Hosek [Wed, 29 May 2019 00:01:05 +0000 (00:01 +0000)]
[Driver] Search the toolchain dir with -print-file-name
This is useful when looking for directories or files relative to the
toolchain root, e.g. include/c++/v1. This change also adds a test
to make sure this functionality doesn't regress in the future.
Richard Smith [Tue, 28 May 2019 23:09:46 +0000 (23:09 +0000)]
Defer creating fields for captures until we finish building the
capturing expression or statement.
No functionality change yet. The intent is that we will also delay
building the initialization expression until the enclosing context, so
that:
a) we build the initialization expression in the right context, and
b) we can elide captures that are not odr-used, as suggested by P0588R1.
This also consolidates some duplicated code building capture fields into
a single place.
Currently the `-working-directory` option does not actually impact the working
directory for all of the clang driver, it only impacts how files are looked up
to make sure they exist. This means that that clang passes the wrong paths
to -fdebug-compilation-dir and -coverage-notes-file.
This patch fixes that by changing all the places in the driver where we convert
to absolute paths to use the VFS, and then calling setCurrentWorkingDirectory on
the VFS. This also changes the default VFS for `Driver` to use a virtualized
working directory, instead of changing the process's working directory.
Yaxun Liu [Tue, 28 May 2019 21:18:59 +0000 (21:18 +0000)]
[CUDA][HIP] Emit dependent libs for host only
Recently D60274 was introduced to allow lld to handle dependent libs. However current
usage of dependent libs (e.g. pragma comment(lib, *) in windows header files) are intended
for host only. Emitting the metadata in device IR causes link error in device path.
Until there is a way to different it dependent libs for device or host, metadata for dependent
libs should be emitted for host only. This patch enforces that.
As for other floating-point rounding builtins that can be optimized
when build with -fno-math-errno, this patch adds support for lrint
and llrint. It currently only optimize for AArch64 backend.
Joel E. Denny [Tue, 28 May 2019 19:27:19 +0000 (19:27 +0000)]
[OpenMP] Set pragma start loc to `#pragma` loc
This patch adjusts `PragmaOpenMPHandler` to set the location of
`tok::annot_pragma_openmp` to the `#pragma` location instead of the
`omp` location so that the former becomes the start location of the
OpenMP AST node. This can be useful when, for example, rewriting a
directive using Clang's Rewrite facility. Most of this patch updates
tests for changes to locations in diagnostics and `-ast-dump` output.
Update the `cl` emulation to support the `/Zc:char8_t[-]?` options as per the
MSVC 2019.1 toolset. These are aliases for `-fchar8_t` and `-fno-char8_t`.
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