Summary:
For a static object with a nontrivial destructor, clang generates an
initializer function (__cxx_global_var_init) which registers that
object's destructor using __cxa_atexit. However some ABIs (ARM,
WebAssembly) use destructors that return 'this' instead of having void
return (which does not match the signature of function pointers passed
to __cxa_atexit). This results in undefined behavior when the destructors are
called. All the calling conventions I know of on ARM can tolerate this,
but WebAssembly requires the signatures of indirect calls to match the
called function.
This patch disables that direct registration of destructors for ABIs
that have this-returning destructors.
Subscribers: aemerson, jfb, cfe-commits, dschuff
Differential Revision: http://reviews.llvm.org/D19275
llvm-svn: 269085
directives.
OpenMP 4.5 supports clause 'priority' in task-based directives. Patch
adds initial codegen support for this clause in codegen.
llvm-svn: 269050
If private variables require destructors call at the deletion of the
task, additional flag in task flags must be set. Patch fixes this
problem.
llvm-svn: 269039
schedule modifiers.
Runtime library expects some additional data in schedule argument for
loop-based directives, that have additional schedule modifiers
'monotonic|nonmonotonic'.
llvm-svn: 269035
Currently, if clang::isBetterOverloadCandidate encounters an enable_if
attribute on either candidate that it's inspecting, it will ignore all
lower priority attributes (e.g. pass_object_size). This is problematic
in cases like:
```
void foo(char *c) __attribute__((enable_if(1, "")));
void foo(char *c __attribute__((pass_object_size(0))))
__attribute__((enable_if(1, "")));
```
...Because we would ignore the pass_object_size attribute in the second
`foo`, and consider any call to `foo` to be ambiguous.
This patch makes overload resolution consult further tiebreakers (e.g.
pass_object_size) if two candidates have equally good enable_if
attributes.
llvm-svn: 269005
Allow only empty constructors for local __shared__ variables in a way
identical to restrictions imposed on dynamic initializers for global
variables on device.
Differential Revision: http://reviews.llvm.org/D20039
llvm-svn: 268982
According to CUDA programming guide (v7.5):
> E.2.9.4: Within the body of a device or global function, only
> shared variables may be declared with static storage class.
Differential Revision: http://reviews.llvm.org/D20034
llvm-svn: 268962
This patch corresponds to review:
http://reviews.llvm.org/D19684
It simply adds the handling for the option and the corresponding macros.
llvm-svn: 268951
Support OpenMP version 4.5 syntax for #pragma omp declare target.
Syntax:
#pragma omp declare target (extended-list) new-line
or
#pragma omp declare target clause[ [,] clause ... ] new-line
Where clause is one of the following:
to(extended-list)
link(list)
Differential Revision: http://reviews.llvm.org/D20011
llvm-svn: 268925
- Don't consider "/etc/lsb-release" to be Ubuntu only.
- Detect SL, too.
- Only add "--no-add-needed" for RHEL7 (or Fedora), not for RHEL6
(that's what the compilers shipped with RHEL do).
- removed RHEL4 which is now four years past EOL and certainly incapable
of building or running any recent version of llvm/clang.
llvm-svn: 268914
Some distros with ten years of support ship an old gcc but later offer
more recent versions for installation in parallel. These versions are
typically not only needed for the compilation of llvm/clang, but also to
properly use the clang binary that comes out.
Clang already searches /usr at runtime for the most recent installation
of gcc. This patch appends paths for add-on installations of gcc in
RHEL.
Patch by Michael Lampe.
llvm-svn: 268912
This patch corresponds to reviews:
http://reviews.llvm.org/D15120http://reviews.llvm.org/D19125
It adds support for the __float128 keyword, literals and target feature to
enable it. Based on the latter of the two aforementioned reviews, this feature
is enabled on Linux on i386/X86 as well as SystemZ.
This is also the second attempt in commiting this feature. The first attempt
did not enable it on required platforms which caused failures when compiling
type_traits with -std=gnu++11.
If you see failures with compiling this header on your platform after this
commit, it is likely that your platform needs to have this feature enabled.
llvm-svn: 268898
If the address of a field is taken as a pointer to member, we should
not warn that the field is not used.
Normaly, yse of fields are done from MemberExpr, but in case of pointer to
member, it is in a DeclRefExpr
Differential Revision: http://reviews.llvm.org/D20054
llvm-svn: 268895
Summary: `getAssociatedStmt()` contains an assertion that assumes the statement always exists. In device code scanning, we need to look into the associated statement therefore we check its existence. This patch replaces `getAssociatedStmt` by `hasAssociatedStmt` so that we do not trigger the assertion for directives that happen not to have an associated statement (e.g target enter/exit data).
Reviewers: hfinkel, carlo.bertolli, arpith-jacob, kkwli0, ABataev
Subscribers: cfe-commits, caomhin
Differential Revision: http://reviews.llvm.org/D19812
llvm-svn: 268870
When running reproducer scripts we need that original symlinks from the
source filesystem are reproduced in the VFS so that different virtual
paths can map to the same file, allowing the FileManager to share the
same UID between these virtual entries. This avoids all sorts of module
redefinition errors when using frameworks.
llvm-svn: 268825
Use a StringRef instead of a FileEntry in the moduleMapAddHeader
callback to allow more flexibility on what to collect on further
patches. This changes the interface I introduced in r264971.
llvm-svn: 268819
object in C. Rather than using the DeclContext (which is very slow because it
triggers us to build a lookup table for the DeclContext), use a separate map
from identifiers to decls for this case, containing only the ones we've
actually deserialized. For convenience, this map is implemented as an
IdentifierResolver.
llvm-svn: 268817
When inferring availability attributes for tvos, watchos from ios, we
use the same source location and set the implicit bit to true.
So when emitting diagnostics on inferred attributes, we have a source
location.
rdar://25893544
llvm-svn: 268793
Sometimes, the declaration we found has inherited availability
attributes, attaching the note to it does not tell us where the
availability attributes are in the source.
Go through the redecl chain to find the declaration with actual
availability attributes.
rdar://25221771
llvm-svn: 268786
Replace use of /dev/null with /var/empty. lit will substitute the /dev/null
include path resulting in failures. Use a path under /var/empty which is
supposed to be empty to ensure that we can successfully test.
llvm-svn: 268784
From the GCC manpage:
-I dir
... If dir begins with =, then the = will be replaced by the sysroot prefix;
see --sysroot and -isysroot.
Add support to expand the `=` as a prefix of the include path with the sysroot
if specified. `-isysroot` takes precedence over `--sysroot` as the normal
argument behaviour occurs. The ordering of the `-isysroot` is relevant to the
path substituted. If no `--sysroot=` or `-isysroot` option is present, the = is
not expanded.
Resolves PR26965!
llvm-svn: 268777
Derek Schuff