These calls are allowed to fail spuriously.
29.6.5.25:
Remark: A weak compare-and-exchange operation may fail spuriously.
That is, even when the contents of memory referred to by expected
and object are equal, it may return false and store back to expected
the same memory contents that were originally there. [ Note: This
spurious failure enables implementation of compare and-exchange on a
broader class of machines, e.g., load-locked store-conditional
machines. A consequence of spurious failure is that nearly all uses
of weak compare-and-exchange will be in a loop.
To fix this, we replace any assert() that expects
std::atomic::compare_exchange_weak() to return true with a loop. If the
call does not return true within N runs (with N currently equal to 10),
then the test fails.
http://llvm.org/bugs/show_bug.cgi?id=20546
llvm-svn: 217319
If you're crazy enough to want this sort of thing, then add
-D_LIBCPP_HAS_NO_THREADS to your CXXFLAGS and
--param=additiona_features=libcpp-has-no-threads to your lit commnad line.
http://reviews.llvm.org/D3969
llvm-svn: 217271
This modifies the use_clang_verify parameter I added in r217009 to
only apply to tests that specifically ask for it via // USE_VERIFY.
This allows us to incrementally convert tests, but start enjoying the
benefits right away.
Suggested by Eric Fiselier in code review.
llvm-svn: 217017
Currently, failure tests work by checking that compilation exits 1.
This can lead to tests that fail for the wrong reason, so it'd be
preferable to convert them to check for specific errors.
This adds use_clang_verify parameter that runs failure tests using
clang's -verify flag. I'll convert some tests in subsequent commits,
and once all of the tests are converted we should key this on whether
cxx_under_test is clang.
I've also converted one of the unique.ptr tests, since it's the one
that motivated the idea of using clang -verify when possible in the
review of r216317.
llvm-svn: 217009
The way the standard currently specifies the default constructor for atomic<T>
requires T to be nothrow default constructible. This patch makes our test types
meet this requirement.
Note: The nothrow default constructible requirment is subject to the outcome of
LWG issue 1265.
llvm-svn: 216561
After discussing implementing more tests for this with @danalbert & @mclow, I
realized this change is not correct.
The C++ standard requires do_is() to behave as if it were a loop that checked
is(). Furthermore, it requires is() to check "The first form returns the result
of the expression (M & m) != 0; i.e., true if the character has the
characteristics specified"... which the reverted patch definitely does not
conform to. Even further, furthermore, this requires that ctype's mask be an
actual bitmask, unlike what android and newlib provide for _ctype_.
Fixing the original bug that instigated this patch remains TBD.
llvm-svn: 216508
Summary:
In order to gather more information about testsuite results these flags should be added to LIT's default args.
These new switches were recently added to LIT. It been more than two weeks since both switches were added.
I think its time we add these to our LIT flags.
Reviewers: mclow.lists, danalbert
Reviewed By: danalbert
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D5037
llvm-svn: 216315
The purely imperative format of the configuration performed in lit.cfg
was making merge conflicts with changes I have for Android an
unbelievable pain in the ass. I've moved all of the configuration into a
Configuration class, with each piece of configuration happening in a
different method. This way I can avoid merge conflicts, and any new
features that get added (as have been done with the sanitizers, the -std
flag, etc.) can be easily applied to Android as well.
Reviewers: mclow.lists, EricWF
Reviewed By: EricWF
Differential Revision: http://reviews.llvm.org/D4952
llvm-svn: 216196
This marks some of the localization test XFAIL on linux.
There has been some discussion on D4861 about doing this.
Please let me know if any of these tests for you on linux.
llvm-svn: 216151
This marks some of the localization test XFAIL on linux.
There has been some discussion on D4861 about doing this.
Please let me know if any of these tests for you on linux.
llvm-svn: 216150
This marks some of the localization test XFAIL on linux.
There has been some discussion on D4861 about doing this.
Please let me know if any of these tests for you on linux.
llvm-svn: 216148
Marshall Clow