Richard Smith [Thu, 30 Aug 2018 19:16:33 +0000 (19:16 +0000)]
Improve attribute documentation to list which spellings are used in which syntaxes.
Summary:
Instead of listing all the spellings (including attribute namespaces) in
the section heading, only list the actual attribute names there, and
list the spellings in the supported syntaxes table.
This allows us to properly describe things like [[fallthrough]], for
which we allow a clang:: prefix in C++ but not in C, and AlwaysInline,
which has one spelling as a GNU attribute and a different spelling as a
keyword, without needing to repeat the syntax description in the
documentation text.
Artem Dergachev [Thu, 30 Aug 2018 18:45:05 +0000 (18:45 +0000)]
[analyzer] InnerPointerChecker: Fix a segfault when checking symbolic strings.
Return value of dyn_cast_or_null should be checked before use.
Otherwise we may put a null pointer into the map as a key and eventually
crash in checkDeadSymbols.
Matt Morehouse [Thu, 30 Aug 2018 15:54:44 +0000 (15:54 +0000)]
[libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.
Patch By: metzman
Reviewers: morehouse, rnk
Reviewed By: morehouse, rnk
Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman
Matt Arsenault [Thu, 30 Aug 2018 08:18:06 +0000 (08:18 +0000)]
AMDGPU: Default to hidden visibility
Object linking isn't supported, so it's not useful
to emit default visibility. Default visibility requires
relocations we don't yet support for functions compiled
in another translation unit.
WebAssembly already does this, although they insert these
arguments in a different place for some reason.
Richard Trieu [Thu, 30 Aug 2018 01:57:52 +0000 (01:57 +0000)]
Ensure canonical type is actually canonical.
ASTContext::applyObjCProtocolQualifiers will return a canonical type when given
a canonical type and an array of canonical protocols. If the protocols are not
canonical then the returned type is also not canonical. Since a canonical type is needed, canonicalize the returned type before using it. This later prevents
a type from having a non-canonical canonical type.
Richard Smith [Thu, 30 Aug 2018 01:01:07 +0000 (01:01 +0000)]
Adjust Attr representation so that changes to documentation don't affect
how we parse source code.
Instead of implicitly opting all undocumented attributes out of '#pragma
clang attribute' support, explicitly opt them all out and remove the
documentation check from TableGen.
(No new attributes should be added without documentation, so this has
little chance of backsliding. We already support the pragma on one
undocumented attribute, so we don't even want to enforce our old
"rule".)
Nick Desaulniers [Wed, 29 Aug 2018 22:50:47 +0000 (22:50 +0000)]
[AttrDocs]: document gnu_inline function attribute
Summary: This wasn't documented https://clang.llvm.org/docs/AttributeReference.html, and briefly mentioned https://clang.llvm.org/docs/UsersManual.html#differences-between-various-standard-modes.
Artem Dergachev [Wed, 29 Aug 2018 22:43:31 +0000 (22:43 +0000)]
[analyzer] Support modeling no-op BaseToDerived casts in ExprEngine.
Introduce a new MemRegion sub-class, CXXDerivedObjectRegion, which is
the opposite of CXXBaseObjectRegion, to represent such casts. Such region is
a bit weird because it is by design bigger than its super-region.
But it's not harmful when it is put on top of a SymbolicRegion
that has unknown extent anyway.
Offset computation for CXXDerivedObjectRegion and proper modeling of casts
still remains to be implemented.
Yaxun Liu [Wed, 29 Aug 2018 20:39:22 +0000 (20:39 +0000)]
Add predefined macro __gnu_linux__ for proper aux-triple
Clang predefine macro __linx__ for aux-triple with Linux OS
but does not predefine macro __gnu_linux__. This causes
some compilation error for certain applications, e.g. Eigen.
Matt Morehouse [Wed, 29 Aug 2018 18:08:34 +0000 (18:08 +0000)]
[libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.
Reviewers: morehouse, rnk
Reviewed By: morehouse, rnk
Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman
Martin Storsjo [Wed, 29 Aug 2018 17:26:58 +0000 (17:26 +0000)]
[MinGW] Don't mark external variables as DSO local
Since MinGW supports automatically importing external variables from
DLLs even without the DLLImport attribute, we shouldn't mark them
as DSO local unless we actually know them to be local for sure.
Ilya Biryukov [Wed, 29 Aug 2018 16:35:31 +0000 (16:35 +0000)]
[Tooling] Do not restore working dir in ClangTool
Summary:
Resolve all relative paths before running the tool instead.
This fixes the usage of ClangTool in AllTUsExecutor. The executor will
try running multiple ClangTool instances in parallel with compile
commands that usually have the same working directory.
Changing working directory is a global operation, so we end up
changing working directory in the middle of running other actions,
which leads to spurious compile errors.
Mike Rice [Wed, 29 Aug 2018 15:45:11 +0000 (15:45 +0000)]
[OPENMP] Create non-const ident_t objects.
Currently ident_t objects are created const when debug info is not
enabled, but the libittnotify libray in the OpenMP runtime writes to
the reserved_2 field (See __kmp_itt_region_forking in
openmp/runtime/src/kmp_itt.inl). Now create ident_t objects non-const.
Sam Parker [Wed, 29 Aug 2018 10:39:03 +0000 (10:39 +0000)]
[ARM] Set __ARM_FEATURE_SIMD32 for +dsp cores
ARM_FEATURE_DSP is already set for targets with the +dsp feature. In
the backend, this target feature is also used to represent the
availability of the of the instructions that the ACLE guard through
the __ARM_FEATURE_SIMD32 macro. We don't have any cores that
implement one and not the other, so set this macro for cores later
than V6 or for Cortex-M cores that the target parser, or user, reports
that the 'dsp' instructions are supported.
Yaxun Liu [Tue, 28 Aug 2018 21:09:09 +0000 (21:09 +0000)]
[HIP] Fix output file extension
OffloadBundlingJobAction constructor accepts a list of JobAction as inputs.
The host JobAction is the last one. The file type of OffloadBundlingJobAction
should be determined by the host JobAction (the last one) instead of the first
one.
Since HIP emits LLVM bitcode for device compilation, device JobAction has
different file type as host Job Action. This bug causes incorrect output file
extension for HIP.
This patch fixes it by using the last input JobAction (host JobAction) to determine
file type of OffloadBundlingJobAction.
Matt Morehouse [Tue, 28 Aug 2018 18:34:32 +0000 (18:34 +0000)]
[libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.
Ilya Biryukov [Tue, 28 Aug 2018 16:15:56 +0000 (16:15 +0000)]
Parse compile commands lazily in InterpolatingCompilationDatabase
Summary:
This greatly reduces the time to read 'compile_commands.json'.
For Chromium on my machine it's now 0.7 seconds vs 30 seconds before the
change.
[OpenMP][NVPTX] Use appropriate _CALL_ELF macro when offloading
Summary: When offloading to a device and using the powerpc64le version of the auxiliary triple, the _CALL_ELF macro is not set correctly to 2 resulting in the attempt to include a header that does not exist. This patch fixes this problem.
Kit Barton [Mon, 27 Aug 2018 19:53:19 +0000 (19:53 +0000)]
[PPC] Remove Darwin support from POWER backend.
This patch removes uses of the Darwin ABI for PowerPC related test cases. This
is the first step in removing Darwin support from the POWER backend.
clang/test/CodeGen/darwin-ppc-varargs.c was deleted because it was a darwin/ppc
specific test case.
All other tests were updated to remove the darwin/ppc specific invocation.
Leonard Chan [Mon, 27 Aug 2018 17:57:29 +0000 (17:57 +0000)]
[Sema/Attribute] Make types declared with address_space an AttributedType
Currently an address_space is stored in a qualifier. This makes any type
declared with an address_space attribute in the form
`__attribute__((address_space(1))) int 1;` be wrapped in an AttributedType.
This is for a later patch where if `address_space` is declared in a macro,
any diagnostics that would normally print the address space will instead dump
the macro name. This will require saving any macro information in the
AttributedType.
Chandler Carruth [Mon, 27 Aug 2018 08:49:20 +0000 (08:49 +0000)]
Try to fix this clang driver test case after r340709.
If any of the bots complain about this, I'll just revert. This test case
is essentially trying to test the exact change made, but I think this
matches the intent of the patch in question.
Jonas Hahnfeld [Sat, 25 Aug 2018 13:42:40 +0000 (13:42 +0000)]
[CUDA/OpenMP] Define only some host macros during device compilation
When compiling CUDA or OpenMP device code Clang parses header files
that expect certain predefined macros from the host architecture. To
make this work the compiler passes the host triple via the -aux-triple
argument and (until now) pulls in all macros for that "auxiliary triple"
unconditionally.
However this results in defines like __SSE_MATH__ that will trigger
inline assembly making use of the "advertised" target features. See
the discussion of D47849 and PR38464 for a detailed explanation of
the encountered problems.
Instead of blacklisting "known bad" examples this patch starts adding
defines that are needed for certain headers like bits/wordsize.h and
bits/mathinline.h.
The disadvantage of this approach is that it decouples the definitions
from their target toolchain. However in my opinion it's more important
to keep definitions for one header close together. For one this will
include a clear documentation why these particular defines are needed.
Furthermore it simplifies maintenance because adding defines for a new
header or support for a new aux-triple only needs to touch one piece
of code.
Hans Wennborg [Fri, 24 Aug 2018 22:46:33 +0000 (22:46 +0000)]
Revert r323281 "Adjust MaxAtomicInlineWidth for i386/i486 targets."
As reported on http://lists.llvm.org/pipermail/cfe-dev/2018-August/058760.html,
this broke i386-freebsd11 due to its lack of atomic 64 bit primitives.
While that's not really this commit's fault, let's revert back to the old
behaviour until this can be fixed. This means generating cmpxchg8b etc for i386
and i486 which don't technically support those, but that's been the behaviour
for a long time, so a little longer probably doesn't hurt that much.
> Adjust MaxAtomicInlineWidth for i386/i486 targets.
>
> This is to fix the bug reported in https://bugs.llvm.org/show_bug.cgi?id=34347#c6.
> Currently, all MaxAtomicInlineWidth of x86-32 targets are set to 64. However,
> i386 doesn't support any cmpxchg related instructions. i486 only supports cmpxchg.
> So in this patch MaxAtomicInlineWidth is reset as follows:
> For i386, the MaxAtomicInlineWidth should be 0 because no cmpxchg is supported.
> For i486, the MaxAtomicInlineWidth should be 32 because it supports cmpxchg.
> For others 32 bits x86 cpu, the MaxAtomicInlineWidth should be 64 because of cmpxchg8b.
>
> Differential Revision: https://reviews.llvm.org/D42154
Eric Liu [Fri, 24 Aug 2018 08:59:54 +0000 (08:59 +0000)]
[FileManager] Do not call 'real_path' in getFile().
Summary:
This partially rolls back the change in D48903:
https://github.com/llvm-mirror/clang/commit/89aa7f45a1f728144935289d4ce69d8522999de0#diff-0025af005307891b5429b6a834823d5eR318
`real_path` can be very expensive on real file systems, and calling it on each
opened file can slow down the compilation. This also slows down deserialized
ASTs for which real paths need to be recalculated for each input files again.
For clangd code completion latency (using preamble):
Before
{F7039629}
After
{F7039630}
[analyzer] added cache for SMT queries in the SMTConstraintManager
Summary:
This patch implements a new cache for the result of SMT queries; with this patch the regression tests are 25% faster.
It's implemented as a `llvm::DenseMap` where the key is the hash of the set of the constraints in a state.
There is still one method that does not use the cache, `getSymVal`, because it needs to get a symbol interpretation from the SMT, which is not cached yet.
[analyzer] Moved all CSA code from the SMT API to a new header, `SMTConv.h`. NFC.
Summary:
With this patch, the SMT backend is almost completely detached from the CSA.
Unfortunate consequence is that we missed the `ConditionTruthVal` from the CSA and had to use `Optional<bool>`.
The Z3 solver implementation is still in the same file as the `Z3ConstraintManager`, in `lib/StaticAnalyzer/Core/Z3ConstraintManager.cpp` though, but except for that, the SMT API can be moved to anywhere in the codebase.
[analyzer] Templatefy SMTConstraintManager so more generic code can be moved from solver specific implementations. NFC.
Summary:
By making SMTConstraintManager a template and passing the SMT constraint type and expr, we can further move code from the Z3ConstraintManager class to the generic SMT constraint Manager.
Now, each SMT specific constraint manager only needs to implement the method `bool canReasonAbout(SVal X) const`.
Update avr attributes test for output change in r340519
After this commit there is an addrspace(1) before the attribute #. Since
these tests are only checking the value of the attribute add a {{.*}} to
make the test resilient to future output changes.
Ivan Donchevskii [Thu, 23 Aug 2018 09:48:11 +0000 (09:48 +0000)]
[libclang] Fix cursors for arguments of Subscript and Call operators
The DeclRefExpr of CXXOperatorCallExpr refering to the custom operator
is visited before the arguments to the operator call. For the Call and
Subscript operator the range of this DeclRefExpr includes the whole call
expression, so that all tokens in that range were mapped to the operator
function, even the tokens of the arguments.
Fix this by ensuring that this particular DeclRefExpr is visited last.
Chandler Carruth [Thu, 23 Aug 2018 06:06:38 +0000 (06:06 +0000)]
[x86/retpoline] Split the LLVM concept of retpolines into separate
subtarget features for indirect calls and indirect branches.
This is in preparation for enabling *only* the call retpolines when
using speculative load hardening.
I've continued to use subtarget features for now as they continue to
seem the best fit given the lack of other retpoline like constructs so
far.
The LLVM side is pretty simple. I'd like to eventually get rid of the
old feature, but not sure what backwards compatibility issues that will
cause.
This does remove the "implies" from requesting an external thunk. This
always seemed somewhat questionable and is now clearly not desirable --
you specify a thunk the same way no matter which set of things are
getting retpolines.
I really want to keep this nicely isolated from end users and just an
LLVM implementation detail, so I've moved the `-mretpoline` flag in
Clang to no longer rely on a specific subtarget feature by that name and
instead to be directly handled. In some ways this is simpler, but in
order to preserve existing behavior I've had to add some fallback code
so that users who relied on merely passing -mretpoline-external-thunk
continue to get the same behavior. We should eventually remove this
I suspect (we have never tested that it works!) but I've not done that
in this patch.
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