Commit Graph

707 Commits

Author SHA1 Message Date
Howard Hinnant 9146984e73 Fixed a bug in wstring_convert concerning zero-length inputs. Thanks to Jonathan Coxhead for reporting this bug.
llvm-svn: 160136
2012-07-12 18:07:41 +00:00
Richard Smith ceefe51364 Teach libc++ to check for libc++abi and use its features if they're available.
llvm-svn: 160038
2012-07-11 09:35:47 +00:00
Howard Hinnant 38b99b025c Add test for self-referencing emplace test.
llvm-svn: 159921
2012-07-09 02:47:43 +00:00
Howard Hinnant 598f702b04 Change emplace for vector and deque to create the temporary (when necessary) before any changes to the container are made. Nikolay Ivchenkov deserves the credit for pushing this problem and the solution for it.
llvm-svn: 159918
2012-07-08 23:23:04 +00:00
Howard Hinnant c0937e8add Appy constexpr to <memory>. Picked up a few missing noexcepts as well.
llvm-svn: 159902
2012-07-07 20:56:04 +00:00
Howard Hinnant bfa7990b5a Apply constexpr to the mutex constructor. As a conforming extension, apply constexpr to the condition_variable constructor. These are important because it enables the compiler to construct these types at compile time, even though the object will be non-const. Since they are constructed at compile time, there is no chance of a data race before they are constructed.
llvm-svn: 159901
2012-07-07 20:01:52 +00:00
Howard Hinnant eeac9fcfb7 Apply constexpr to <bitset>.
llvm-svn: 159899
2012-07-07 17:04:52 +00:00
Howard Hinnant 8a9ee14803 Apply noexcept to tuple.
llvm-svn: 159865
2012-07-06 21:53:48 +00:00
Howard Hinnant a0f4c45c38 As a conforming extension give tuple a noexcept default constructor conditionalized on its held types.
llvm-svn: 159858
2012-07-06 20:50:27 +00:00
Howard Hinnant a62ebe043e Give tuple a constexpr default constructor.
llvm-svn: 159857
2012-07-06 20:39:45 +00:00
Howard Hinnant 9f06558f86 New Windows libc++ test results provided by Ruben Van Boxem.
llvm-svn: 159852
2012-07-06 19:35:31 +00:00
Howard Hinnant 9d6d1c6860 Apply noexcept to those functions implemented in <cstdlib> as a conforming extension.
llvm-svn: 159850
2012-07-06 19:16:56 +00:00
Howard Hinnant 9c14b75a37 Apply noexcept to those functions implemented in <cmath> as a conforming extension.
llvm-svn: 159849
2012-07-06 19:13:50 +00:00
Howard Hinnant 227001d12e Add noexcept test for offsetof macro per [support.types]/p4.
llvm-svn: 159846
2012-07-06 18:39:01 +00:00
Howard Hinnant 4cb38a82a2 This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have.
llvm-svn: 159836
2012-07-06 17:31:14 +00:00
Howard Hinnant 6b45660f14 link to Marshall's notes.
llvm-svn: 159791
2012-07-06 00:39:38 +00:00
Nuno Lopes 6317bfb26a mark operator new(std::nothrow) as noalias (aka __attribute__((malloc))
llvm-svn: 159359
2012-06-28 16:47:34 +00:00
Howard Hinnant f08ebab2ea Fixed a bug regarding result_of reported by Sven Behne. The fix is C++11 only mainly because result_of is a variadic beast and working with variadics is just such a problem in C++03 mode. This should bring result_of up to full conformance with the C++11 spec.
llvm-svn: 159211
2012-06-26 17:37:15 +00:00
Nuno Lopes d8ed7e5b03 fix help with bash
llvm-svn: 159177
2012-06-25 23:51:05 +00:00
Howard Hinnant c418654096 Revert pair constructors back to using is_convertible instead of is_constructible. This should pull things into alignment with the final draft. Fixes http://llvm.org/bugs/show_bug.cgi?id=13063#add_comment.
llvm-svn: 158280
2012-06-09 20:01:23 +00:00
Douglas Gregor 07db340438 Fix warning flags for CMake builds, from Andrew C. Morrow!
llvm-svn: 158172
2012-06-07 22:26:00 +00:00
Howard Hinnant 0bc272cf9a Fix a few testsuite bugs involving trailing null (or lack thereof) in strstream.
llvm-svn: 157832
2012-06-01 20:02:59 +00:00
Howard Hinnant 4c0de496a0 Fix dangling else clause. Bug found and fixed by Dimitry Andric.
llvm-svn: 157779
2012-05-31 23:12:03 +00:00
Howard Hinnant 78b4015c1c Fix the new _ALIGNAS_TYPE per instructions supplied by Eli Friedman.
llvm-svn: 157765
2012-05-31 20:14:00 +00:00
Howard Hinnant bf33f5b292 Protect use of alignas against older versions of clang
llvm-svn: 157764
2012-05-31 19:31:14 +00:00
Howard Hinnant 8b805c915a The rules for emplace in map, multimap, unordered_map and unordered_multimap changed a while back and I'm just now updating to these new rules. In a nutshell, you've got to know you're emplacing to a pair and use one of pair's constructors. I made one extension: If you want to emplace the key and default construct the mapped_type, you can just emplace(key), as opposed to emplace(piecewise_construct, forward_as_tuple(key), forward_as_tuple()).
llvm-svn: 157503
2012-05-25 22:04:21 +00:00
Howard Hinnant a960edd203 Fix memory corruption bug found and fixed by Andrew C. Morrow.
llvm-svn: 157476
2012-05-25 15:55:46 +00:00
Howard Hinnant 49c3b20737 Add documentation regarding -fno-rtti.
llvm-svn: 157157
2012-05-20 13:03:53 +00:00
Howard Hinnant ed81e910bd Revert fix to http://llvm.org/bugs/show_bug.cgi?id=12867 for the reason now included in the code comment.
llvm-svn: 157128
2012-05-19 20:20:49 +00:00
Douglas Gregor a336f5e645 Revert my _LIBCPP_INLINE_VISIBILITY changes, r157097 and r157107
llvm-svn: 157108
2012-05-19 07:14:17 +00:00
Douglas Gregor a1b6937dba valarray resize should not be _LIBCPP_INLINE_VISIBILITY
llvm-svn: 157107
2012-05-19 07:01:14 +00:00
Douglas Gregor 8f69b1af3d Move _LIBCPP_VISIBLE_INLINE from the out-of-line definitions of member
functions to the original declarations, so that Clang will actually
see them. Part of <rdar://problem/11489333>.

llvm-svn: 157097
2012-05-19 04:41:25 +00:00
Howard Hinnant 9042d623bf Protect __shared_weak_count::__get_deleter declaration with _LIBCPP_NO_RTTI. Fixes http://llvm.org/bugs/show_bug.cgi?id=12867
llvm-svn: 157049
2012-05-18 13:06:21 +00:00
Howard Hinnant 423a8d7733 Fix several bugs in find/count specialized for bits.
llvm-svn: 156546
2012-05-10 14:55:00 +00:00
Howard Hinnant 19d9cbfb39 Add friends __count_bool_true and __count_bool_false to __bit_iterator.
llvm-svn: 156543
2012-05-10 14:01:40 +00:00
Howard Hinnant 0ae9efeb1a SFINAE __bit_iterator such that it will only get instantiated with a container that has the nested type __storage_type. This prevents accidental instantiation such as in http://llvm.org/bugs/show_bug.cgi?id=12755. This fixes http://llvm.org/bugs/show_bug.cgi?id=12755.
llvm-svn: 156308
2012-05-07 16:50:38 +00:00
Howard Hinnant df7aad41fd Constrain __bind functor constructor such that it won't accidentally get used as a copy constructor from a non-const lvalue. Fixes <rdar://problem/11359080>.
llvm-svn: 156182
2012-05-04 17:21:02 +00:00
Howard Hinnant 9acfc3af72 Change std::abs from a template function to three overloads for float, double and long double.
llvm-svn: 156064
2012-05-03 14:58:34 +00:00
Howard Hinnant bff1bfc6be Greatly scale back ambitions of emulating move semantics in C++03 mode. It was causing more problems than it solved. This fixes http://llvm.org/bugs/show_bug.cgi?id=12704.
llvm-svn: 155918
2012-05-01 15:37:54 +00:00
Richard Smith 11ffde3d7e libc++: only #include <cxxabi.h> if it exists. This allows libc++ to build
out of the box on Linux systems. If you're building against libc++abi, you
still need to make sure it can find <cxxabi.h> so it knows not to export
symbols which libc++abi provides.

llvm-svn: 155091
2012-04-19 01:36:12 +00:00
Richard Smith 99f15d6eb7 libc++: Add some missing #includes to atomics tests. libc++ doesn't need these
at the moment, but they allow these tests to be used to test clang against
libstdc++. Add myself to the credits file, as suggested by Howard.

llvm-svn: 155085
2012-04-19 00:50:47 +00:00
Howard Hinnant d01320c200 Apply noexcept and constexpr to <atomic>.
llvm-svn: 154526
2012-04-11 20:14:21 +00:00
Richard Smith 766e8ccbfc Switch libc++ from __atomic_* builtins to __c11_atomic_* builtins.
Per discussion with Howard, we are not interested in maintaining
compatibility with older versions of clang.

All tests pass with ToT clang, except for two which assert due to
a pre-existing, unrelated bug.

llvm-svn: 154521
2012-04-11 18:55:46 +00:00
David Chisnall cd42f9446b Now that clang supports doing the right thing with regard to atomic
initialisation, do the right thing with regard to atomic initialisation.

Note: clang r154507 or later required for <atomic> to work now.
llvm-svn: 154508
2012-04-11 17:26:23 +00:00
David Chisnall 4fa71de024 Fix the remaining atomic tests, all of which were wrong for the case where a
compare-and-exchange failed (it should update the expected value to the current
value, and the tests were checking that it didn't...).

Results of the atomics part of the test suite on FreeBSD with clang trunk and
the atomic.c from compiler-rt (currently kludged into the test, not installed
properly):

****************************************************
Results for /root/libc++/test/atomics:
using clang version 3.1 (trunk 153415)
Target: x86_64-unknown-freebsd10.0
Thread model: posix
with -std=c++0x -stdlib=libc++ -pthread /tmp/atomic.o  
----------------------------------------------------
sections without tests   : 0
sections with failures   : 0
sections without failures: 14
                       +   ----
total number of sections : 14
----------------------------------------------------
number of tests failed   : 0
number of tests passed   : 52
                       +   ----
total number of tests    : 52
****************************************************

Yay!

llvm-svn: 154095
2012-04-05 13:48:16 +00:00
David Chisnall ca917f5342 Fix test cases that were trying to make atomic things that are not trivially copyable.
Now all of the test cases compile.  Some of them even run!

llvm-svn: 154094
2012-04-05 13:23:08 +00:00
David Chisnall c5d5a98815 Fix use of __atomic_is_lock_free() intrinsic.
llvm-svn: 154093
2012-04-05 13:13:24 +00:00
Howard Hinnant 7e5b4c9328 Put std::piecewise_construct_t back into the dylib for ABI stability. When clients are in C++11/constexpr mode this will be safely ignored because piecewise_construct is then declared with internal linkage.
llvm-svn: 153981
2012-04-03 23:45:46 +00:00
Howard Hinnant b2e9f19caf constexpr support for <utility>. Patch contributed by Jonathan Sauer.
llvm-svn: 153968
2012-04-03 21:09:48 +00:00
Howard Hinnant 6e3e78acba Updated documentation contributed by Christopher Jefferson.
llvm-svn: 153955
2012-04-03 15:08:42 +00:00