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Atmn Patel 51b78a3e06 [libc++] Bugfix to std::binomial_distribution<int> 
The current implementation of binomial_distribution is not guaranteed to
converge for certain extreme configurations of the engine and distribution.
This is due to a mistake in the implementation of the algorithm from the
given reference paper. The algorithm in the paper is guaranteed to
terminate but has redundant statements. The current implementation
simplified away the redundancy into a while loop, but it excludes the
return condition of the case where a good sample cannot be returned for
the particular sample being used from the uniform distribution, which is
what causes the infinite loop. This change guarantees termination by
recognizing that a good sample cannot be returned and returning 0 after
breaking the loop. This is also in contrast to the paper because the
return value as specified in the paper violates basic checks in at least
a subset of the extreme cases where the current implementation fails to
terminate. This default return value of 0 is satisfactory for the
extreme case known so far.

Since this is only meant to affect extreme cases where the algorithm
does not terminate anyways, the behavior is expected to remain exactly
the same for all non-extreme cases that have been terminating so far.

Fixes https://llvm.org/PR44847

Differential Revision: https://reviews.llvm.org/D74997
 		2020-03-17 15:56:16 -04:00
..
experimental [NFC] Strip trailing whitespace from libc++ 2019-10-23 11:19:19 -07:00
ext [libc++] Cleanup and enable multiple warnings. 2019-12-12 21:09:08 -05:00
support [libcxx] [Windows] Store the lconv struct returned from localeconv in locale_t 2020-01-29 22:37:11 +02:00
CMakeLists.txt [libc++] Implementation of C++20's P1135R6 for libcxx 2020-02-24 10:59:35 -05:00
__bit_reference [libc++] Fix ABI break in __bit_reference. 2020-02-19 12:02:06 -05:00
__bsd_locale_defaults.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__bsd_locale_fallbacks.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__config Add flag _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATIONS for basic_string ABI 2020-03-02 10:26:37 -05:00
__config_site.in [libc++] Take 2: Integrate the PSTL into libc++ 2019-08-05 18:29:14 +00:00
__debug [libc++][NFC] Remove excess trailing newlines from most files 2019-10-23 08:08:57 -07:00
__errc Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__functional_03 [libc++] Properly mark std::function as deprecated in C++03 2020-03-10 17:45:39 -04:00
__functional_base [libc++] Fix unintended ADL inside ref(reference_wrapper<T>) and cref(reference_wrapper<T>) 2020-02-20 12:22:21 -05:00
__functional_base_03 Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__hash_table [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
__libcpp_version Bump the trunk major version to 11 2020-01-15 13:38:01 +01:00
__locale [libcxx] Fix build breakage on mips 2019-08-20 10:19:55 +00:00
__mutex_base [libc++] Ensure __config always defines certain configuration macros. 2019-12-13 15:42:07 -05:00
__node_handle Avoid name conflict with kernel headers 2019-04-24 09:43:44 +00:00
__nullptr Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__split_buffer [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
__sso_allocator Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__std_stream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__string Partially inline basic_string copy constructor in UNSTABLE 2020-03-04 17:52:46 -05:00
__threading_support Some fixes for open breaks on MacOS and UBSan 2020-02-26 20:51:19 -08:00
__tree [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
__tuple Refactor default constructor SFINAE in pair and tuple. 2019-09-30 20:55:30 +00:00
__undef_macros Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
algorithm Rename __is_foo_iterator traits to reflect their Cpp17 nature. 2019-11-18 01:49:32 -05:00
any [NFC][libc++] Remove stray semi-colon after function definition 2019-06-19 16:33:28 +00:00
array Reland [libc++] [P0325] Implement to_array from LFTS with updates. 2020-01-31 11:47:18 +01:00
atomic [libc++] Fix CI and Linux failures after landing D68480 2020-02-24 11:58:25 -05:00
barrier [libc++] Proper fix for libc++'s modulemap after D68480 2020-02-25 11:31:10 -05:00
bit [NFC] Strip trailing whitespace from libc++ 2019-10-23 11:19:19 -07:00
bitset Ensure bitset's string constructor doesn't poison the overload set. 2019-07-01 19:59:34 +00:00
cassert Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ccomplex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cctype Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cerrno Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cfenv Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cfloat Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
charconv [libc++] Add availability markup for std::to_chars on Apple platforms 2020-02-17 09:32:46 -05:00
chrono [libc++] [chrono] Fix year_month_weekday::ok() implementation. 2019-11-15 18:48:45 +01:00
cinttypes Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ciso646 Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
climits Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
clocale Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cmath [libc++] Harden usage of static_assert against C++03 2019-10-01 12:12:21 +00:00
codecvt Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
compare Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
complex [libc++] reduce <complex> parsing time 2020-02-19 16:09:41 -05:00
complex.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
condition_variable Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
csetjmp Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
csignal Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdarg Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdbool Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstddef [libc++] Revert 03dd205c15 "Adjust max_align_t handling" 2020-02-25 11:42:08 -05:00
cstdint Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdio Remove ::gets for FreeBSD 13 and later 2019-09-07 22:18:20 +00:00
cstdlib Fix _LIBCPP_HAS_ definitions for Android. 2019-11-18 12:19:58 -08:00
cstring Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ctgmath Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ctime Fix _LIBCPP_HAS_ definitions for Android. 2019-11-18 12:19:58 -08:00
ctype.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cwchar Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cwctype Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
deque [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
errno.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
exception Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
execution [pstl][libc++] Provide uglified header names for interface headers 2019-08-06 21:11:24 +00:00
fenv.h Mark fenv.h as a system header before the #include_next directive 2019-03-29 16:03:57 +00:00
filesystem Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
float.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
forward_list [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
fstream Open fstream files in O_CLOEXEC mode when possible. 2019-09-16 19:26:41 +00:00
functional [libc++] Properly mark std::function as deprecated in C++03 2020-03-10 17:45:39 -04:00
future Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
initializer_list [NFC][libcxx] Remove trailing whitespace 2019-05-29 16:01:36 +00:00
inttypes.h AIX system headers need stdint.h and inttypes.h to be re-enterable 2019-06-20 15:36:32 +00:00
iomanip [NFC][libcxx] Remove trailing whitespace 2019-05-29 16:01:36 +00:00
ios Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
iosfwd Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
iostream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
istream [libc++] Implement LWG 3199 2019-08-20 18:21:06 +00:00
iterator Rename __is_foo_iterator traits to reflect their Cpp17 nature. 2019-11-18 01:49:32 -05:00
latch [libc++] Proper fix for libc++'s modulemap after D68480 2020-02-25 11:31:10 -05:00
limits Fix -Wdouble-promotion warnings. 2019-07-01 16:13:31 +00:00
limits.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
list [libc++] Rework compressed pair constructors. 2019-12-16 18:38:58 -05:00
locale [NFC][libcxx] Remove trailing whitespace 2019-05-29 16:01:36 +00:00
locale.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
map [libc++] Use _EnableIf instead of std::enable_if in deduction guides for map and set 2019-07-19 17:13:39 +00:00
math.h Revert "[libc++] Move abs and div into stdlib.h to fix header cycle." 2020-02-17 17:59:08 +01:00
memory Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
module.modulemap [libc++] Give headers that require C++14 a cplusplus14 requires in the modulemap 2020-02-24 20:20:55 +01:00
mutex [libc++] Mark __call_once_proxy as hidden and internal 2019-11-11 10:27:48 -05:00
new [libc++] Revert 03dd205c15 "Adjust max_align_t handling" 2020-02-25 11:42:08 -05:00
numeric [libc++] Fix typo in std::midpoint 2019-12-21 01:26:24 -08:00
optional Add a missing '__uncvref_t' to the SFINAE constraints for optional's assignment operator. Fixes PR38638. Thanks to Jonathan Wakely for the report 2019-06-27 18:40:55 +00:00
ostream Add forward declaration of operator<< in <string_view> as required. 2019-09-25 18:56:54 +00:00
queue Rename __is_foo_iterator traits to reflect their Cpp17 nature. 2019-11-18 01:49:32 -05:00
random [libc++] Bugfix to std::binomial_distribution<int> 2020-03-17 15:56:16 -04:00
ratio Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
regex Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
scoped_allocator Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
semaphore Some fixes for open breaks on MacOS and UBSan 2020-02-26 20:51:19 -08:00
set [libc++] Use _EnableIf instead of std::enable_if in deduction guides for map and set 2019-07-19 17:13:39 +00:00
setjmp.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
shared_mutex Revert "Suppress -Wctad-maybe-unsupported on types w/o deduction guides." 2019-08-04 07:13:43 +00:00
span [libc++] span: Fix incorrect static asserts 2020-02-14 14:32:41 +01:00
sstream add a test and a couple minor bug fixes for the implicit-signed-integer-truncation sanitizer. This is PR#40566 2019-02-01 21:59:27 +00:00
stack [NFC][libcxx] Remove trailing whitespace 2019-05-29 16:01:36 +00:00
stdbool.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stddef.h [libc++] Revert 03dd205c15 "Adjust max_align_t handling" 2020-02-25 11:42:08 -05:00
stdexcept Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
stdint.h AIX system headers need stdint.h and inttypes.h to be re-enterable 2019-06-20 15:36:32 +00:00
stdio.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stdlib.h Revert "[libc++] Move abs and div into stdlib.h to fix header cycle." 2020-02-17 17:59:08 +01:00
streambuf Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
string Partially inline basic_string copy constructor in UNSTABLE 2020-03-04 17:52:46 -05:00
string.h Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
string_view Add forward declaration of operator<< in <string_view> as required. 2019-09-25 18:56:54 +00:00
strstream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
system_error Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
tgmath.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
thread [libc++] Hide some functions and types in <future> and <thread> as hidden 2019-12-10 19:19:45 -05:00
tuple PR43764: Qualify a couple of calls to forward_as_tuple to be ADL-resilient. 2019-10-28 18:04:41 -07:00
type_traits [libc++] Remove cycle between <type_traits> and <cstddef> 2020-02-14 17:36:27 +01:00
typeindex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
typeinfo Fix -Wdeprecated-copy-dtor and -Wdeprecated-dynamic-exception-spec warnings. 2020-03-17 18:59:54 +01:00
unordered_map Add contains method to associative containers. This patch implements P0458R2, adding contains to map, multimap, unordered_map, unordered_multimap, set, multiset, unordered_set, and unordered_multiset. 2019-07-16 03:21:01 +00:00
unordered_set Add contains method to associative containers. This patch implements P0458R2, adding contains to map, multimap, unordered_map, unordered_multimap, set, multiset, unordered_set, and unordered_multiset. 2019-07-16 03:21:01 +00:00
utility Refactor default constructor SFINAE in pair and tuple. 2019-09-30 20:55:30 +00:00
valarray [libc++] Cleanup and enable multiple warnings. 2019-12-12 21:09:08 -05:00
variant Improve compile time of variant. 2019-07-14 21:29:39 +00:00
vector [libcxx] Qualify make_move_iterator in vector::insert for input iterators 2020-02-11 11:00:45 +01:00
version [libc++] [P0646] Add feature-test macro for __cpp_lib_list_remove_return_type. 2020-03-12 11:06:49 +01:00
wchar.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
wctype.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00