Rafael Espindola [Thu, 11 Jan 2018 22:15:12 +0000 (22:15 +0000)]
Make internal/private GVs implicitly dso_local.
While updating clang tests for having clang set dso_local I noticed
that:
- There are *a lot* of tests to update.
- Many of the updates are redundant.
They are redundant because a GV is "obviously dso_local". This patch
starts formalizing that a bit by requiring that internal and private
GVs be dso_local too. Since they all are, we don't have to print
dso_local to the textual representation, making it a bit more compact
and easier to read.
Richard Smith [Thu, 11 Jan 2018 22:13:57 +0000 (22:13 +0000)]
Handle scoped_lockable objects being returned by value in C++17.
In C++17, guaranteed copy elision means that there isn't necessarily a
constructor call when a local variable is initialized by a function call that
returns a scoped_lockable by value. In order to model the effects of
initializing a local variable with a function call returning a scoped_lockable,
pretend that the move constructor was invoked within the caller at the point of
return.
Alex Bradbury [Thu, 11 Jan 2018 15:38:01 +0000 (15:38 +0000)]
[Driver][RISCV] Fix r322276 for Windows (path separator issue)
We were seeing test failures of riscv32-toolchain.c on windows due to the \
path separator being used for the linker. Add {{/|\\\\}} pattern (made
horrible due to escaping), just like introduced in r214931.
Alex Bradbury [Thu, 11 Jan 2018 13:51:06 +0000 (13:51 +0000)]
[Driver][RISCV] Fix r322276 by adding missing dummy crtbegin.o files to test input
The dummy crtbegin.o files were left out in r322276 (as they were ignored by
svn add of test/Driver/Inputs/multilib_riscv_linux_sdk) and are necessary for
the driver test to work.
Craig Topper [Thu, 11 Jan 2018 01:37:57 +0000 (01:37 +0000)]
[X86][Sema] Remove constant range checks on on builtins that take a char.
The constant is already reduced to 8-bits by the time we get here and the checks were just ensuring that it was 8 bits. Thus I don't think there's anyway for them to fail.
Matt Morehouse [Wed, 10 Jan 2018 20:27:48 +0000 (20:27 +0000)]
[MSan] Enable use-after-dtor instrumentation by default.
Summary:
Enable the compile-time flag -fsanitize-memory-use-after-dtor by
default. Note that the run-time option MSAN_OPTIONS=poison_in_dtor=1
still needs to be enabled for destructors to be poisoned.
Brian Gesiak [Wed, 10 Jan 2018 20:23:45 +0000 (20:23 +0000)]
[Driver] Test for correct '--version' suggestion
Summary:
The `llvm::OptTable::findNearest` bug fixed in
https://reviews.llvm.org/D41873 manifested itself as the following
erroneous message when invoking Clang:
```
clang -version
clang-6.0: error: unknown argument '-version', did you mean 'version'?
```
Add a test to catch any future regressions to the now correct behavior,
which asks "did you mean '--version'?".
George Karpenkov [Wed, 10 Jan 2018 01:22:14 +0000 (01:22 +0000)]
[analyzer] suppress nullability inference from a macro when result is used in another macro
The current code used to not suppress the report, if the dereference was
performed in a macro, assuming it is that same macro.
However, the assumption might not be correct, and XNU has quite a bit of
code where dereference is actually performed in a different macro.
As the code uses macro name and not a unique identifier it might be fragile,
but in a worst-case scenario we would simply emit an extra diagnostic.
Don Hinton [Wed, 10 Jan 2018 01:00:28 +0000 (01:00 +0000)]
[cmake] Delete redundant install command for clang-refactor.
Summary: Install targets for clang tools are controlled by
CLANG_BUILD_TOOLS, and when OFF, cmake issues the following warning:
WARNING: Target "clang-refactor" has EXCLUDE_FROM_ALL set and will not
be built by default but an install rule has been provided for it.
CMake does not define behavior for this case.
Adrian McCarthy [Tue, 9 Jan 2018 23:49:30 +0000 (23:49 +0000)]
Reland "Emit Function IDs table for Control Flow Guard"
Adds option /guard:cf to clang-cl and -cfguard to cc1 to emit function IDs
of functions that have their address taken into a section named .gfids$y for
compatibility with Microsoft's Control Flow Guard feature.
The original patch didn't have the lit.local.cfg file that restricts the new
test to x86, thus the new test was failing on the non-x86 bots.
Brian Gesiak [Tue, 9 Jan 2018 21:26:47 +0000 (21:26 +0000)]
[Frontend] Remove unused FileMgr in pp arg parse
Summary:
A FIXME added 8 years ago (2010) in https://reviews.llvm.org/rL118203
mentioned that a FileManager should not need to be used when parsing
preprocessor arguments. In fact, its only use was removed 6 years ago
(2012), in https://reviews.llvm.org/rL166452. Remove the unused
variable and the obsolete FIXME.
Alexey Bataev [Tue, 9 Jan 2018 19:21:04 +0000 (19:21 +0000)]
[OpenMP] Fix handling of clause on wrong directive, by Joel. E. Denny
Summary:
First, this patch fixes an assert failure when, for example, "omp for"
has num_teams.
Second, this patch prevents duplicate diagnostics when, for example,
"omp for" has uniform.
This patch makes the general assumption (even where it doesn't
necessarily fix an existing bug) that it is worthless to perform sema
for a clause that appears on a directive on which OpenMP does not
permit that clause. However, due to this assumption, this patch
suppresses some diagnostics that were expected in the test suite. I
assert that those diagnostics were likely just distracting to the
user.
Aaron Ballman [Tue, 9 Jan 2018 13:07:03 +0000 (13:07 +0000)]
Track in the AST whether the operand to a UnaryOperator can overflow and then use that logic when evaluating constant expressions and emitting codegen.
Oren Ben Simhon [Tue, 9 Jan 2018 08:53:59 +0000 (08:53 +0000)]
Added Control Flow Protection Flag
Cf-protection is a target independent flag that instructs the back-end to instrument control flow mechanisms like: Branch, Return, etc.
For example in X86 this flag will be used to instrument Indirect Branch Tracking instructions.
Erich Keane [Tue, 9 Jan 2018 01:09:12 +0000 (01:09 +0000)]
Fix use-after-free found by address-san on -r322028.
r322028 attempted to remove something from the "Manglings"
list when it was no longer valid, and did so with 'erase'.
However, StringRefs to these were stored, so these became
dangling references. This patch changes to using 'remove' instead
of 'erase' to keep the strings valid.
Erich Keane [Mon, 8 Jan 2018 21:34:17 +0000 (21:34 +0000)]
Implement Attribute Target MultiVersioning
GCC's attribute 'target', in addition to being an optimization hint,
also allows function multiversioning. We currently have the former
implemented, this is the latter's implementation.
This works by enabling functions with the same name/signature to coexist,
so that they can all be emitted. Multiversion state is stored in the
FunctionDecl itself, and SemaDecl manages the definitions.
Note that it ends up having to permit redefinition of functions so
that they can all be emitted. Additionally, all versions of the function
must be emitted, so this also manages that.
Note that this includes some additional rules that GCC does not, since
defining something as a MultiVersion function after a usage has been made illegal.
The only 'history rewriting' that happens is if a function is emitted before
it has been converted to a multiversion'ed function, at which point its name
needs to be changed.
Function templates and virtual functions are NOT yet supported (not supported
in GCC either).
Additionally, constructors/destructors are disallowed, but the former is
planned.
Douglas Yung [Mon, 8 Jan 2018 21:21:17 +0000 (21:21 +0000)]
[DOXYGEN] Fix doxygen and content issues in avxintrin.h
- Fix incorrect wording in various intrinsic descriptions. Previously the descriptions used "low-order" and "high-order" when the intended meaning was "even-indexed" and "odd-indexed".
- Fix a few typos and errors found during review.
- Restore new line endings.
Richard Smith [Mon, 8 Jan 2018 21:12:04 +0000 (21:12 +0000)]
Factor out comparison handling for arithmetic types.
This is not quite NFC: we don't perform the usual arithmetic conversions unless
we have an operand of arithmetic or enumeration type any more. This matches the
standard rule, but actually has no effect other than to marginally improve our
diagnostics for the non-arithmetic, non-enumeration cases (by not performing
integral promotions on one operand if the other is a pointer).
Adrian McCarthy [Mon, 8 Jan 2018 16:33:42 +0000 (16:33 +0000)]
Emit Function IDs table for Control Flow Guard
Adds option /guard:cf to clang-cl and -cfguard to cc1 to emit function IDs
of functions that have their address taken into a section named .gfids$y for
compatibility with Microsoft's Control Flow Guard feature.
Ivan A. Kosarev [Mon, 8 Jan 2018 15:36:06 +0000 (15:36 +0000)]
[CodeGen] Fix TBAA info for accesses to members of base classes
Resolves:
Bug 35724 - regression (r315984): fatal error: error in backend:
Broken function found (Did not see access type in access path!)
https://bugs.llvm.org/show_bug.cgi?id=35724
Richard Trieu [Sat, 6 Jan 2018 03:20:59 +0000 (03:20 +0000)]
Test case for r321396
Any hashing for methods should be able to compile this test case without
emitting an error. Since the class and method come from the same header from
each module, there should be no messages about ODR violations.
Richard Smith [Sat, 6 Jan 2018 01:07:05 +0000 (01:07 +0000)]
Serialize the IDNS for a UsingShadowDecl rather than recomputing it.
Attempting to recompute it are doomed to fail because the IDNS of a declaration
is not necessarily preserved across serialization and deserialization (in turn
because whether a friend declaration is visible depends on whether some prior
non-friend declaration exists).
Richard Smith [Sat, 6 Jan 2018 00:09:23 +0000 (00:09 +0000)]
When name lookup finds a non-imported declaration and looks back along the
redecl chain for an imported declaration, make sure to check the IDNS of prior
imported decls.
Otherwise we can end up finding an invisible friend declaration and incorrectly
believing that it should be visible.
Steven Wu [Fri, 5 Jan 2018 22:45:03 +0000 (22:45 +0000)]
Preserve unknown STDC pragma through preprocessor
Summary:
#pragma STDC FP_CONTRACT handler is only registered in parser so we
should keep the unknown STDC pragma through preprocessor and we also
should not emit warning for unknown STDC pragma during preprocessor.
This is a follow up to r321855, closing the gap between our internal shadow
modules implementation and upstream. It has been tested for longer and
provides a better approach for tracking shadow modules. Mostly NFCI.
No -fsanitize=function warning when calling noexcept function through non-noexcept pointer in C++17
As discussed in the mail thread <https://groups.google.com/a/isocpp.org/forum/
#!topic/std-discussion/T64_dW3WKUk> "Calling noexcept function throug non-
noexcept pointer is undefined behavior?", such a call should not be UB.
However, Clang currently warns about it.
This change removes exception specifications from the function types recorded
for -fsanitize=function, both in the functions themselves and at the call sites.
That means that calling a non-noexcept function through a noexcept pointer will
also not be flagged as UB. In the review of this change, that was deemed
acceptable, at least for now. (See the "TODO" in compiler-rt
test/ubsan/TestCases/TypeCheck/Function/function.cpp.)
To remove exception specifications from types, the existing internal
ASTContext::getFunctionTypeWithExceptionSpec was made public, and some places
otherwise unrelated to this change have been adapted to call it, too.
This is the cfe part of a patch covering both cfe and compiler-rt.
Reapply r321781: [Modules] Allow modules specified by -fmodule-map-file to shadow implicitly found ones
When modules come from module map files explicitly specified by
-fmodule-map-file= arguments, allow those to override/shadow modules
with the same name that are found implicitly by header search. If such a
module is looked up by name (e.g. @import), we will always find the one
from -fmodule-map-file. If we try to use a shadowed module by including
one of its headers report an error.
This enables developers to force use of a specific copy of their module
to be used if there are multiple copies that would otherwise be visible,
for example if they develop modules that are installed in the default
search paths.
Patch originally by Ben Langmuir,
http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20151116/143425.html
Based on cfe-dev discussion:
http://lists.llvm.org/pipermail/cfe-dev/2015-November/046164.html
Adrian Prantl [Fri, 5 Jan 2018 01:13:52 +0000 (01:13 +0000)]
Debug Info: Support DW_AT_calling_convention on composite types.
This implements the DWARF 5 feature described at
http://www.dwarfstd.org/ShowIssue.php?issue=141215.1
This allows a consumer to understand whether a composite data type is
trivially copyable and thus should be passed by value instead of by
reference. The canonical example is being able to distinguish the
following two types:
// S is not trivially copyable because of the explicit destructor.
struct S {
~S() {}
};
Richard Smith [Thu, 4 Jan 2018 23:42:29 +0000 (23:42 +0000)]
Make attribute instantiation instantiate all attributes, not just the first of
each kind.
Attribute instantiation would previously default to instantiating each kind of
attribute only once. This was overridden by a flag whose intended purpose was
to permit attributes from a prior declaration to be inherited onto a new
declaration even if that new declaration had its own copy of the attribute.
This is the wrong behavior: when instantiating attributes from a template, we
should always instantiate all the attributes that were written on that
template.
This patch renames the flag in the Attr class (and TableGen sources) to more
clearly identify what it's actually for, and removes the usage of the flag from
template instantiation. I also removed the flag from AlignedAttr, which was
only added to work around the incorrect suppression of duplicate attribute
instantiation.
Hubert Tong [Thu, 4 Jan 2018 22:58:30 +0000 (22:58 +0000)]
Use backslash escape, replacing xargs -0 in test macro-multiline.c
Summary:
xargs supports escaping of newline characters with backslash.
xargs -0 is neither part of POSIX nor the LSB.
This patch removes the -0 option and adjusts the input to xargs
accordingly; that is, the input is a text file not ending in an
incomplete line, and the newline of interest is preceded by a backslash.
Note: The treatment of escaped newline characters is not as clearly
specified by POSIX as for escaped blank characters; however, the same
can be said for escaped backslashes. It is slightly more clear for the
case where the -I option is used; however, -I is also of limited
portability.
Alexey Bataev [Thu, 4 Jan 2018 20:50:08 +0000 (20:50 +0000)]
[OPENMP] Fix capturing of expressions in clauses.
Patch fixes incorrect capturing of the expressions in clauses with
expressions that must be captured for the combined constructs. Incorrect
capturing may lead to compiler crash during codegen phase.
Alexey Bataev [Thu, 4 Jan 2018 20:18:55 +0000 (20:18 +0000)]
[OPENMP] Fix casting in NVPTX support library.
If the reduction required shuffle in the NVPTX codegen, we may need to
cast the reduced value to the integer type. This casting was implemented
incorrectly and may cause compiler crash. Patch fixes this problem.
[libclang] Support querying whether a declaration is invalid
This is useful for e.g. highlighting purposes in an IDE.
Note: First version of this patch was reverted due to failing tests in
opencl-types.cl with -target ppc64le-unknown-linux. These tests are
adapted now.
[Modules] Allow modules specified by -fmodule-map-file to shadow implicitly found ones
When modules come from module map files explicitly specified by
-fmodule-map-file= arguments, allow those to override/shadow modules
with the same name that are found implicitly by header search. If such a
module is looked up by name (e.g. @import), we will always find the one
from -fmodule-map-file. If we try to use a shadowed module by including
one of its headers report an error.
This enables developers to force use of a specific copy of their module
to be used if there are multiple copies that would otherwise be visible,
for example if they develop modules that are installed in the default
search paths.
Patch originally by Ben Langmuir,
http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20151116/143425.html
Based on cfe-dev discussion:
http://lists.llvm.org/pipermail/cfe-dev/2015-November/046164.html
Richard Smith [Thu, 4 Jan 2018 01:24:17 +0000 (01:24 +0000)]
PR35045: Convert injected-class-name to its corresponding simple-template-id
during template argument deduction.
We already did this when the injected-class-name was in P, but missed the case
where it was in A. This (probably) can't happen except in implicit deduction
guides.
Hubert Tong [Thu, 4 Jan 2018 01:15:52 +0000 (01:15 +0000)]
Replace cp -a in various Clang tests
Summary:
cp -a is neither part of POSIX nor the LSB. The nearest equivalent under
POSIX is cp -RPp; however, cp -R is sufficient for the intended purpose.
test/Modules/crash-vfs-headermaps.m is not updated since it requires
system-darwin anyway.
Alex Lorenz [Wed, 3 Jan 2018 23:52:42 +0000 (23:52 +0000)]
PR35815: Separate out the ns-consumed diagnostic into an error and
a warning
This commit separates out the warn_nsconsumed_attribute_mismatch and
warn_nsreturns_retained_attribute_mismatch diagnostic into a warning and error.
This is needed to avoid a module import regression introduced by r313717 that
turned these errors into warnings and started promoting them only when needed,
which caused an error when importing a module as it had different warning
settings.
Vedant Kumar [Wed, 3 Jan 2018 23:11:32 +0000 (23:11 +0000)]
[CGBuiltin] Handle unsigned mul overflow properly (PR35750)
r320902 fixed the IRGen for some types of checked multiplications. It
did not handle unsigned overflow correctly in the case where the signed
operand is negative (PR35750).
Eli pointed out that on overflow, the result must be equal to the unique
value that is equivalent to the mathematically-correct result modulo two
raised to the k power, where k is the number of bits in the result type.
This patch fixes the specialized IRGen from r320902 accordingly.
Testing: Apart from check-clang, I modified the test harness from
r320902 to validate the results of all multiplications -- not just the
ones which don't overflow:
Richard Smith [Wed, 3 Jan 2018 23:03:54 +0000 (23:03 +0000)]
PR33503: When a qualified name in a redeclaration names a prior declaration in
an inline namespace, update its semantic DeclContext to match.
We would previously get the semantic DeclContext wrong (pointing to the named
scope rather than the inline namespace within it), resulting in wrong lookup
results and linkage-related problems if the inline namespace was an anonymous
namespace.
Aaron Ballman [Wed, 3 Jan 2018 22:22:48 +0000 (22:22 +0000)]
Introduce some infrastructure for adding C attributes with [[]] syntax.
This patch adds support to the attribute tablegen for specifying a [[]] attribute is allowed in C mode. This patch also adds the annotate attribute to the list of double square bracket attributes we support in C mode.
Eventually, I anticipate that this logic will be reversed (you have to opt out of allowing an attribute in C rather than opting in), but I want to see how the design plays out as more attributes are considered.
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