Chris Bieneman [Thu, 11 Aug 2016 00:19:51 +0000 (00:19 +0000)]
[Order Files] Don't use empty order files
LD64 does optimization on symbol layouts that gets disabled whenever an order file is passed (even if it is empty). This change prevents disabling that optimization, and still enables iterative generation and usage of order files.
If the order file is empty it does not setup the order file flags, instead it sets the empty order file as a configuration dependency. When the order file changes it will then trigger a re-configuration that adds the linker flag.
Reapply r277787. For memset (and others) we can get diagnostics like:
struct stat { int x; };
void foo(struct stat *stamps) {
bzero(stamps, sizeof(stamps));
memset(stamps, 0, sizeof(stamps));
}
t.c:7:28: warning: 'memset' call operates on objects of type 'struct stat' while the size is based on a different type 'struct stat *' [-Wsizeof-pointer-memaccess]
memset(stamps, 0, sizeof(stamps));
~~~~~~ ^~~~~~
t.c:7:28: note: did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?
memset(stamps, 0, sizeof(stamps));
^~~~~~
This patch implements the same class of warnings for bzero.
Eric Liu [Wed, 10 Aug 2016 09:32:23 +0000 (09:32 +0000)]
Make clang-format remove duplicate headers when sorting #includes.
Summary: When sorting #includes, #include directives that have the same text will be deduplicated when sorting #includes, and only the first #include in the duplicate #includes remains. If the `Cursor` is provided and put on a deleted #include, it will be put on the remaining #include in the duplicate #includes.
Chandler Carruth [Wed, 10 Aug 2016 07:32:47 +0000 (07:32 +0000)]
[x86] Fix a really nasty bug introduced in r276417 where alignment
constraints were added to _mm256_broadcast_{pd,ps} intel intrinsics.
The spec for these intrinics is ... pretty much silent on alignment.
This is especially frustrating considering the amount of discussion of
alignment in the load and store instrinsics. So I was forced to rely on
the specification for the VBROADCASTF128 instruction.
That instruction's spec is *also* completely silent on alignment.
Fortunately, when it comes to the instruction's spec, silence is enough.
There is no #GP fault option for an underaligned address so this
instruction, and by inference the intrinsic, can read any alignment.
As it happens, the old code worked exactly this way and in fact we have
plenty of code that hands pointers with less than 16-byte alignment to
these intrinsics. This code broke pretty spectacularly with this commit.
Fortunately, the fix is super simple! Change a 16 to a 1, and ta da!
Anyways, a lot of debugging for a really boring fix. =]
Justin Lebar [Wed, 10 Aug 2016 01:09:18 +0000 (01:09 +0000)]
[CUDA] Print a "previous-decl" note when calling an illegal member fn.
Summary:
When we emit err_ref_bad_target, we should emit a "'method' declared
here" note. We already do so in most places, just not in
BuildCallToMemberFunction.
Justin Lebar [Wed, 10 Aug 2016 01:09:14 +0000 (01:09 +0000)]
[CUDA] Add __device__ overloads for placement new and delete.
Summary:
Previously these sort of worked because they didn't end up resulting in
calls at the ptx layer. But I'm adding stricter checks that break
placement new without these changes.
Tim Shen [Tue, 9 Aug 2016 20:22:55 +0000 (20:22 +0000)]
[ADT] Change iterator_adaptor_base's default template arguments to forward more underlying typedefs
Summary:
The corresponding LLVM change: D23217.
LazyVector::iterator breaks, because int isn't an iterator type.
Since iterator_adaptor_base shouldn't be blamed to break at the call to
iterator_traits<int>::xxx, I'd rather "fix" LazyVector::iterator.
The perfect solution is to model "relative pointer", but it's beyond the goal of this patch.
Let the driver pass the option to frontend. Do not set precision metadata for division instructions when this option is set. Set function attribute "correctly-rounded-divide-sqrt-fp-math" based on this option.
Yaxun Liu [Tue, 9 Aug 2016 19:43:38 +0000 (19:43 +0000)]
[OpenCL][AMDGPU] Add support for -cl-denorms-are-zero
Adjust target features for amdgcn target when -cl-denorms-are-zero is set.
Denormal support is controlled by feature strings fp32-denormals fp64-denormals in amdgcn target. If -cl-denorms-are-zero is not set and the command line does not set fp32/64-denormals feature string, +fp32-denormals +fp64-denormals will be on for GPU's supporting them.
A new virtual function virtual void TargetInfo::adjustTargetOptions(const CodeGenOptions &CGOpts, TargetOptions &TargetOpts) const is introduced to allow adjusting target option by codegen option.
Reid Kleckner [Tue, 9 Aug 2016 17:23:56 +0000 (17:23 +0000)]
[clang-cl] Make -gline-tables-only imply -gcodeview
It's surprising that you have to pass /Z7 in addition to -gcodeview to
get debug info. The sanitizer runtime, for example, expects that if the
compiler supports the -gline-tables-only flag, then it will emit debug
info.
Charles Davis [Mon, 8 Aug 2016 21:03:39 +0000 (21:03 +0000)]
[Attr] Add support for the `ms_hook_prologue` attribute.
Summary:
Based on a patch by Michael Mueller.
This attribute specifies that a function can be hooked or patched. This
mechanism was originally devised by Microsoft for hotpatching their
binaries (which they're constantly updating to stay ahead of crackers,
script kiddies, and other ne'er-do-wells on the Internet), but it's now
commonly abused by Windows programs that want to hook API functions. It
is for this reason that this attribute was added to GCC--hence the name,
`ms_hook_prologue`.
Artem Dergachev [Mon, 8 Aug 2016 16:01:02 +0000 (16:01 +0000)]
[analyzer] Change -analyze-function to accept qualified names.
Both -analyze-function and -analyzer-display-progress now share the same
convention for naming functions, which allows discriminating between
methods with the same name in different classes, C++ overloads, and also
presents Objective-C instance and class methods in the convenient notation.
This also allows looking up the name for the particular function you're trying
to restrict analysis to in the -analyzer-display-progress output,
in case it was not instantly obvious.
Oliver Stannard [Mon, 8 Aug 2016 15:28:40 +0000 (15:28 +0000)]
[ARM] Command-line options for embedded position-independent code
This patch (with the corresponding ARM backend patch) adds support for
some new relocation models:
* Read-only position independence (ROPI): Code and read-only data is accessed
PC-relative. The offsets between all code and RO data sections are known at
static link time.
* Read-write position independence (RWPI): Read-write data is accessed relative
to a static base register. The offsets between all writeable data sections
are known at static link time.
These two modes are independent (they specify how different objects
should be addressed), so they can be used individually or together.
These modes are intended for bare-metal systems or systems with small
real-time operating systems. They are designed to avoid the need for a
dynamic linker, the only initialisation required is setting the static
base register to an appropriate value for RWPI code.
There is one C construct not currently supported by these modes: global
variables initialised to the address of another global variable or
function, where that address is not known at static-link time. There are
a few possible ways to solve this:
* Disallow this, and require the user to write their own initialisation
function if they need variables like this.
* Emit dynamic initialisers for these variables in the compiler, called from
the .init_array section (as is currently done for C++ dynamic initialisers).
We have a patch to do this, described in my original RFC email
(http://lists.llvm.org/pipermail/llvm-dev/2015-December/093022.html), but the
feedback from that RFC thread was that this is not something that belongs in
clang.
* Use a small dynamic loader to fix up these variables, by adding the
difference between the load and execution address of the relevant section.
This would require linker co-operation to generate a table of addresses that
need fixing up.
Gabor Horvath [Mon, 8 Aug 2016 09:22:59 +0000 (09:22 +0000)]
[analyzer] Model base to derived casts more precisely.
Dynamic casts are handled relatively well by the static analyzer.
BaseToDerived casts however are treated conservatively. This can cause some
false positives with the NewDeleteLeaks checker.
This patch alters the behavior of BaseToDerived casts. In case a dynamic cast
would succeed use the same semantics. Otherwise fall back to the conservative
approach.
Diana Picus [Mon, 8 Aug 2016 08:27:36 +0000 (08:27 +0000)]
Fix two bugs for musl-libc on ARM
Bug 1: triples like armv7-pc-linux-musl use the wrong linker name
ld-musl-armv7.so.1; the right name should be ld-musl-arm.so.1, disregarding the
subarch field.
Bug 2: when compiler option -mhard-float is used, we should use the "hardfloat"
linker, no matter whether the triple itself mentions "hardfloat".
Serge Pavlov [Mon, 8 Aug 2016 04:02:15 +0000 (04:02 +0000)]
Pass information in a record instead of stack. NFC
Functions of Sema that work with building of nested name specifiers have too
many parameters (BuildCXXNestedNameSpecifier already expects 10 arguments).
With this change the information about identifier and its context is packed
into a structure, which is then passes to the semantic functions.
Headers: Add ARM support to intrin.h for MSVC compatibility
This fixes compiling with headers from the Windows SDK for ARM, where the
YieldProcessor function (in winnt.h) refers to _ARM_BARRIER_ISHST.
The actual MSVC armintr.h contains a lot more definitions, but this is enough to
build code that uses the Windows SDK but doesn't use ARM intrinsics directly.
An alternative would to just keep the addition to intrin.h (to include
armintr.h), but not actually ship armintr.h, instead having clang's intrin.h
include armintr.h from MSVC's include directory. (That one works fine with
clang, at least for building code that uses the Windows SDK.)
Richard Trieu [Fri, 5 Aug 2016 23:24:47 +0000 (23:24 +0000)]
Fix two false positives in -Wreturn-stack-address
If the return type is a pointer and the function returns the reference to a
pointer, don't warn since only the value is returned, not the reference.
If a reference function parameter appears in the reference chain, don't warn
since binding happens at the caller scope, so addresses returned are not
to local stack. This includes default arguments as well.
Richard Trieu [Fri, 5 Aug 2016 21:02:34 +0000 (21:02 +0000)]
Fix false positive in -Wunsequenced and templates.
For builtin logical operators, there is a well-defined ordering of argument
evaluation. For overloaded operator of the same type, there is no argument
evaluation order, similar to other function calls. When both are present,
uninstantiated templates with an operator&& is treated as an unresolved
function call. Unresolved function calls are treated as normal function calls,
and may result in false positives when the builtin logical operator is used.
Have the unsequenced checker ignore dependent expressions to avoid this
false positive. The check also happens in template instantiations to catch
when the overloaded operator is used.
David Blaikie [Fri, 5 Aug 2016 19:03:01 +0000 (19:03 +0000)]
PR26423: Assert on valid use of using declaration of a function with an undeduced auto return type
For now just disregard the using declaration in this case. Suboptimal,
but wiring up the ability to have declarations of functions that are
separate from their definition (we currently only do that for member
functions) and have differing return types (we don't have any support
for that) is more work than seems reasonable to at least fix this crash.
John Brawn [Fri, 5 Aug 2016 11:01:08 +0000 (11:01 +0000)]
Reapply r276973 "Adjust Registry interface to not require plugins to export a registry"
This differs from the previous version by being more careful about template
instantiation/specialization in order to prevent errors when building with
clang -Werror. Specifically:
* begin is not defined in the template and is instead instantiated when Head
is. I think the warning when we don't do that is wrong (PR28815) but for now
at least do it this way to avoid the warning.
* Instead of performing template specializations in LLVM_INSTANTIATE_REGISTRY
instead provide a template definition then do explicit instantiation. No
compiler I've tried has problems with doing it the other way, but strictly
speaking it's not permitted by the C++ standard so better safe than sorry.
Original commit message:
Currently the Registry class contains the vestiges of a previous attempt to
allow plugins to be used on Windows without using BUILD_SHARED_LIBS, where a
plugin would have its own copy of a registry and export it to be imported by
the tool that's loading the plugin. This only works if the plugin is entirely
self-contained with the only interface between the plugin and tool being the
registry, and in particular this conflicts with how IR pass plugins work.
This patch changes things so that instead the add_node function of the registry
is exported by the tool and then imported by the plugin, which solves this
problem and also means that instead of every plugin having to export every
registry they use instead LLVM only has to export the add_node functions. This
allows plugins that use a registry to work on Windows if
LLVM_EXPORT_SYMBOLS_FOR_PLUGINS is used.
Richard Trieu [Fri, 5 Aug 2016 03:16:36 +0000 (03:16 +0000)]
Fix crash in template type diffing.
When the type being diffed is a type alias, and the orginal type is not a
templated type, then there will be no unsugared TemplateSpecializationType.
When this happens, exit early from the constructor. Also add assertions to
the other iterator accessor to prevent the iterator from being used.
Richard Trieu [Fri, 5 Aug 2016 02:39:30 +0000 (02:39 +0000)]
Allow -1 to assign max value to unsigned bitfields.
Silence the -Wbitfield-constant-conversion warning for when -1 or other
negative values are assigned to unsigned bitfields, provided that the bitfield
is wider than the minimum number of bits needed to encode the negative value.
For memset (and others) we can get diagnostics like:
struct stat { int x; };
void foo(struct stat *stamps) {
bzero(stamps, sizeof(stamps));
memset(stamps, 0, sizeof(stamps));
}
t.c:7:28: warning: 'memset' call operates on objects of type 'struct stat' while the size is based on a different type 'struct stat *' [-Wsizeof-pointer-memaccess]
memset(stamps, 0, sizeof(stamps));
~~~~~~ ^~~~~~
t.c:7:28: note: did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?
memset(stamps, 0, sizeof(stamps));
^~~~~~
This patch implements the same class of warnings for bzero.
Artem Dergachev [Thu, 4 Aug 2016 19:37:00 +0000 (19:37 +0000)]
[analyzer] Make CloneDetector recognize different variable patterns.
CloneDetector should be able to detect clones with renamed variables.
However, if variables are referenced multiple times around the code sample,
the usage patterns need to be recognized.
For example, (x < y ? y : x) and (y < x ? y : x) are no longer clones,
however (a < b ? b : a) is still a clone of the former.
Variable patterns are computed and compared during a separate filtering pass.
Alexey Bader [Thu, 4 Aug 2016 18:06:27 +0000 (18:06 +0000)]
[OpenCL] Added underscores to the names of 'to_addr' OpenCL built-ins.
Summary:
In order to re-define OpenCL built-in functions
'to_{private,local,global}' in OpenCL run-time library LLVM names must
be different from the clang built-in function names.
Yaxun Liu [Wed, 3 Aug 2016 20:38:06 +0000 (20:38 +0000)]
[OpenCL] Fix size of image type
The size of image type is reported incorrectly as size of a pointer to address space 0, which causes error when casting image type to pointers by __builtin_astype.
The fix is to get image address space from TargetInfo then report the size accordingly.
Manuel Klimek [Wed, 3 Aug 2016 14:12:17 +0000 (14:12 +0000)]
Fix quadratic runtime when adding items to tooling::Replacements.
Previously, we would search through all replacements when inserting a
new one to check for overlaps. Instead, make use of the fact that we
already have a set of replacments without overlaps to find the potential
overlap with lower_bound.
Summary:
The append operator on a shell command for quick command-line is
causing trouble on windows. [NFC]
The easiest way to fix them is to avoid using them.
This patch is an attempt to fix this broken build bot:
clang-x86-win2008-selfhost
Artem Belevich [Tue, 2 Aug 2016 23:12:51 +0000 (23:12 +0000)]
[CUDA] Fix libdevice selection.
This makes clang's libdevice selection match that of NVCC as described in
http://docs.nvidia.com/cuda/libdevice-users-guide/basic-usage.html#version-selection
If required libdevice variant is not found, driver now fails with an error.
Chris Bieneman [Tue, 2 Aug 2016 18:23:56 +0000 (18:23 +0000)]
Revert "[Order Files] Remove dtrace predicate"
This reverts commit r277487.
Removing the probe predicate was a red herring. It results in more symbols being placed in the final order file, but they are symbols from outside the clang image.
Chris Bieneman [Tue, 2 Aug 2016 17:50:53 +0000 (17:50 +0000)]
[Order Files] Remove dtrace predicate
Having the dtrace predicate setup to only show probes in clang filters out static initializers executed by dyld, which we do want included in the order files.
Diana Picus [Tue, 2 Aug 2016 13:53:00 +0000 (13:53 +0000)]
[clang-cl] Fix PCH tests to use x86_64 as target
These tests require x86-registered-target, but they don't force the target as
x86 on the command line, which means they will be run and they might fail when
building the x86 backend on another platform (such as AArch64).
Artem Dergachev [Tue, 2 Aug 2016 12:21:09 +0000 (12:21 +0000)]
[analyzer] Respect statement-specific data in CloneDetection.
So far the CloneDetector only respected the kind of each statement when
searching for clones. This patch refines the way the CloneDetector collects data
from each statement by providing methods for each statement kind,
that will read the kind-specific attributes.
For example, statements 'a < b' and 'a > b' are no longer considered to be
clones, because they are different in operation code, which is an attribute
specific to the BinaryOperator statement kind.
Chris Bieneman [Mon, 1 Aug 2016 22:54:00 +0000 (22:54 +0000)]
[Order Files] Fixing an error in the perf-helper script
Dtrace probemod needs to be based on the first argument of the command, not the first argument of the args. This error was introduced a while back when I added support for skipping the driver and invoking cc1 directly.
CodeGen: simplify the CC handling for TLS wrappers
Use the calling convention of the wrapper directly to set the calling convention
to ensure that the calling convention matches. Incorrectly setting the calling
convention results in the code path being entirely nullified as InstCombine +
SimplifyCFG will prune the mismatched CC calls.
Martin Bohme [Mon, 1 Aug 2016 12:15:46 +0000 (12:15 +0000)]
Make RecursiveASTVisitor visit lambda capture initialization expressions
Summary:
Lambda capture initializations are part of the explicit source code and
therefore should be visited by default but, so far, RecursiveASTVisitor does not
visit them.
This appears to be an oversight. Because the lambda body needs custom handling
(calling TraverseLambdaBody()), the DEF_TRAVERSE_STMT for LambdaExpr sets
ShouldVisitChildren to false but then neglects to visit the lambda capture
initializations. This patch adds code to visit the expressions associated with
lambda capture initializations.
Eric Liu [Mon, 1 Aug 2016 10:16:37 +0000 (10:16 +0000)]
Implement tooling::Replacements as a class.
Summary:
- Implement clang::tooling::Replacements as a class to provide interfaces to
control how replacements for a single file are combined and provide guarantee
on the order of replacements being applied.
- tooling::Replacements only contains replacements for the same file now.
Use std::map<std::string, tooling::Replacements> to represent multi-file
replacements.
- Error handling for the interface change will be improved in followup patches.
Sylvestre Ledru [Mon, 1 Aug 2016 08:04:45 +0000 (08:04 +0000)]
scan-build: Add an option to show the description in the list of defect
Summary:
This patch adds an option //--show-description// to add the defect description to the list of defect. This helps to get a better understanding of the defect without opening the page.
For example, this is used for Firefox:
https://people.mozilla.org/~sledru/reports/fx-scan-build/
Add more gcc compatibility names to clang's cpuid.h
Summary:
Some cpuid bit defines are named slightly different from how gcc's
cpuid.h calls them.
Define a few more compatibility names to appease software built for gcc:
* `bit_PCLMUL` alias of `bit_PCLMULQDQ`
* `bit_SSE4_1` alias of `bit_SSE41`
* `bit_SSE4_2` alias of `bit_SSE42`
* `bit_AES` alias of `bit_AESNI`
* `bit_CMPXCHG8B` alias of `bit_CX8`
While here, add the misssing 29th bit, `bit_F16C` (which is how gcc
calls this bit).
projects / clang / log