Eric Fiselier ad1a12c312 Improve performance of constructing filesystem::path from strings. ...

This patch fixes a performance bug when constructing or appending to a path
from a string or c-string. Previously we called 'push_back' to append every
single character. This caused multiple re-allocation and copies when at most
one reallocation is necessary. The new behavior is to simply call
`string::append` so it can correctly handle reallocation.

For large strings this change is a ~4x improvement. This also makes our path
faster to construct than libstdc++'s.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@285530 91177308-0d34-0410-b5e6-96231b3b80d8

2016-10-30 23:53:50 +00:00

..

experimental

Improve performance of constructing filesystem::path from strings.

2016-10-30 23:53:50 +00:00

ext

Cleanup: move visibility/linkage attributes to the first declaration.

2016-04-22 01:04:55 +00:00

support

[libc++] Add missing locale aliases

2016-09-29 03:35:41 +00:00

__bit_reference

Get tests running with warnings. Fix warnings in headers and tests

2015-02-05 20:28:37 +00:00

__bsd_locale_defaults.h

Reorganize _LIBCPP_LOCALE__L_EXTENSIONS

2016-03-09 15:39:39 +00:00

__bsd_locale_fallbacks.h

Reorganize _LIBCPP_LOCALE__L_EXTENSIONS

2016-03-09 15:39:39 +00:00

__config

Revert addition of __libcpp_library_version

2016-10-28 22:37:24 +00:00

__config_site.in

Expect DLL builds on Windows by default and require a custom __config for static

2016-09-26 22:19:41 +00:00

__debug

Fix undefined behavior in __hash_table

2016-07-23 20:36:55 +00:00

__functional_03

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

__functional_base

Add missing _v traits. is_bind_expression_v, is_placeholder_v and uses_allocator_v

2016-09-22 00:23:15 +00:00

__functional_base_03

[libcxx] Rewrite C++03 __invoke.

2015-08-26 20:15:02 +00:00

__hash_table

Fix missing _LIBCPP_INLINE_VISIBILITY macro on C++03 specific __hash_table function

2016-09-25 04:05:46 +00:00

__libcpp_version

Add __libcpp_version file and __libcpp_library_version function.

2016-10-28 06:06:50 +00:00

__locale

[libc++] Fix and document visibility attributes for Clang, GCC and Windows.

2016-09-15 22:27:07 +00:00

__mutex_base

Don't use pthread initializers in constexpr constructors. Patch by elram. Reviewed at https://reviews.llvm.org/D21637.

2016-07-18 17:23:06 +00:00

__nullptr

Fix nullptr tests

2016-10-25 20:45:17 +00:00

__refstring

[libc++] Fix modules build - Rework __refstring definition

2016-10-25 19:33:14 +00:00

__split_buffer

Cleanup: move visibility/linkage attributes to the first declaration.

2015-11-07 01:22:13 +00:00

__sso_allocator

Handle function name conflicts in _LIBCPP_MSVCRT mode

2015-02-13 22:15:32 +00:00

__std_stream

Enable and fix warnings during the build.

2015-07-18 20:40:46 +00:00

__string

[libc++] Fix and document visibility attributes for Clang, GCC and Windows.

2016-09-15 22:27:07 +00:00

__threading_support

[libcxx] Improve the gcc workaround for the missing __has_include macro.

2016-10-14 13:56:58 +00:00

__tree

Avoid embedded preprocessor directives in __tree

2016-08-27 19:32:03 +00:00

__tuple

Fix or suppress GCC warnings during build.

2016-08-29 20:43:38 +00:00

__undef___deallocate

Add option to disable __deallocate #warning

2016-07-12 14:39:13 +00:00

__undef_min_max

Add option to disable __deallocate #warning

2016-07-12 14:39:13 +00:00

algorithm

Implement C++17 std::sample.

2016-08-28 22:14:37 +00:00

any

Make any_cast<void()>(nullptr) compile

2016-10-16 11:56:38 +00:00

array

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

atomic

Revert r276506 - Diagnose invalid memory order arguments in <atomic>.

2016-07-23 01:43:53 +00:00

bitset

Avoid narrowing warnings in __bitset constructor

2016-09-02 21:02:11 +00:00

cassert

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

ccomplex

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

cctype

Put back the undefs that Richard removed. Boost won't build w/o these; specifically the file 'bytes_methods.h' in Apple's python framework defines these.

2016-04-04 22:49:20 +00:00

cerrno

Split <errno.h> out of <cerrno>.

2015-10-08 20:37:11 +00:00

cfenv

Fix incorrect file header. This is <cfenv> not <cctype>.

2015-10-08 21:17:21 +00:00

cfloat

Split <float.h> out of <cfloat>.

2015-10-08 20:37:44 +00:00

chrono

Last bit of P0006; mark it as complete

2015-11-30 05:39:30 +00:00

cinttypes

Split <inttypes.h> out of <cinttypes>.

2015-10-08 20:38:53 +00:00

ciso646

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

climits

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

clocale

Make support for thread-unsafe C functions optional.

2015-06-24 08:44:38 +00:00

CMakeLists.txt

[CMake] NFC. Fixing spelling from r280400

2016-09-01 19:46:02 +00:00

cmath

Remove some additional unnecessary std:: in cmath

2016-10-01 20:38:44 +00:00

codecvt

Update synopsis in <locale> to match LWG Issue 2229. No code change

2013-08-27 14:22:13 +00:00

complex

Use __builtin_isnan/isinf/isfinite in complex

2016-10-01 20:38:31 +00:00

complex.h

PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths.

2015-10-09 00:26:50 +00:00

condition_variable

Cleanup: move visibility/linkage attributes to the first declaration.

2015-11-07 01:22:13 +00:00

csetjmp

Split <setjmp.h> out of <csetjmp>.

2015-10-08 20:41:26 +00:00

csignal

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

cstdarg

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

cstdbool

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

cstddef

PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths.

2015-10-09 00:26:50 +00:00

cstdint

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

cstdio

cstdio: limit gets to CRT versions below 14

2016-09-01 21:09:19 +00:00

cstdlib

Fix or suppress GCC warnings during build.

2016-08-29 20:43:38 +00:00

cstring

Fix overload sets of strchr, strpbrk, strrchr, memchr and strstr from

2016-02-10 00:59:02 +00:00

ctgmath

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

ctime

Make support for thread-unsafe C functions optional.

2015-06-24 08:44:38 +00:00

ctype.h

PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths.

2015-10-09 00:26:50 +00:00

cwchar

Fix overload sets of strchr, strpbrk, strrchr, memchr and strstr from

2016-02-10 00:59:02 +00:00

cwctype

Split <wctype.h> out of <cwctype>.

2015-10-09 19:57:37 +00:00

deque

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

errno.h

Cleanup foo.h headers and __config to work in C

2015-11-06 06:30:12 +00:00

exception

Try 2 - Remove <cstdlib> include from <exception>

2016-09-06 21:25:27 +00:00

float.h

Cleanup foo.h headers and __config to work in C

2015-11-06 06:30:12 +00:00

forward_list

Implement P0084r2. Changing emplace return types.

2016-07-21 03:20:17 +00:00

fstream

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

functional

Add void_t and invoke feature test macros

2016-10-14 07:19:52 +00:00

future

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

initializer_list

Apply constexpr to initializer_list for c++1y.

2013-08-26 20:11:32 +00:00

inttypes.h

[include] Declare __STDC_*_MACROS for C++11 compat in old libc

2016-09-26 20:20:00 +00:00

iomanip

Move 'quoted' for string_view from <string_view> to <iomanip> (where the other versions of 'quoted' live. No functional change.

2016-10-27 15:10:07 +00:00

ios

Make ios_base::failure visibility specified consistent

2016-04-21 23:00:33 +00:00

iosfwd

Make __wrap_iter work with GCC again

2016-02-20 00:19:45 +00:00

iostream

Make the presence of stdin and stdout optional.

2015-03-26 14:35:46 +00:00

istream

[libc++] Add _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY to support GCC ABI compatibility

2016-09-16 00:00:48 +00:00

iterator

Implement constexpr support for reverse_iterator. Reviewed as https://reviews.llvm.org/D25534

2016-10-19 15:12:50 +00:00

limits

[WebAssembly] Set std::numeric_limits's traps field for WebAssembly.

2016-01-13 16:32:00 +00:00

limits.h

[libcxx] Fix gcc build.

2016-10-10 15:56:01 +00:00

list

Fix breakage introduced by adding -Wshadow.

2016-10-23 19:26:39 +00:00

locale

[libc++] Fix and document visibility attributes for Clang, GCC and Windows.

2016-09-15 22:27:07 +00:00

map

Support allocators with explicit conversion constructors. Fixes bug #29000

2016-08-17 05:58:40 +00:00

math.h

[libc++] Remove math_win32.h

2016-09-24 06:27:28 +00:00

memory

Fix incorrect exception handling behavior in the uninitialized algorithms

2016-10-11 21:13:44 +00:00

module.modulemap

[ModuleMap] Add more module entries to cover some non modular headers

2016-10-21 03:14:27 +00:00

mutex

[libcxx] Fix a data race in call_once

2016-09-04 09:55:12 +00:00

new

Implement P0035R4 -- Add C++17 aligned allocation functions

2016-10-14 06:46:30 +00:00

numeric

Implement LCM and GCD for C++17. Same code as for Library Fundamentals TS.

2016-07-26 14:29:45 +00:00

optional

Update status for std::optional LWG issues and fix an optional SFINAE bug

2016-10-16 03:21:35 +00:00

ostream

[libc++] Add _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY to support GCC ABI compatibility

2016-09-16 00:00:48 +00:00

queue

Implement P0084r2. Changing emplace return types.

2016-07-21 03:20:17 +00:00

random

Cleanup: move visibility/linkage attributes to the first declaration.

2015-11-07 01:22:13 +00:00

ratio

[libc++] Remove various C++03 feature test macros

2016-09-25 03:34:28 +00:00

regex

[libcxx] Make regex_match backtrack when search fails

2016-10-27 21:40:34 +00:00

scoped_allocator

[libc++] Remove various C++03 feature test macros

2016-09-25 03:34:28 +00:00

set

Add static_assert to set/multiset/map/multimap/forward_list/deque that the allocator's value_type match the container's value_type. vector/unordered/list/string already do this. Add tests for all the containers to verify this.

2015-11-26 01:24:04 +00:00

setjmp.h

Cleanup foo.h headers and __config to work in C

2015-11-06 06:30:12 +00:00

shared_mutex

Qualify calls to addressof to avoid getting ADL. Fixes PR#27254.

2016-04-13 17:02:23 +00:00

sstream

Move _LIBCPP_INLINE_VISIBILITY to first declaration in sstream.

2016-09-16 02:09:26 +00:00

stack

Implement P0084r2. Changing emplace return types.

2016-07-21 03:20:17 +00:00

stdbool.h

Add stdbool.h wrapper for libc++

2016-02-20 00:16:41 +00:00

stddef.h

PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths.

2015-10-09 00:26:50 +00:00

stdexcept

[libc++] Fix modules build - Rework __refstring definition

2016-10-25 19:33:14 +00:00

stdint.h

[include] Declare __STDC_*_MACROS for C++11 compat in old libc

2016-09-26 20:20:00 +00:00

stdio.h

Split <stdio.h> out of <cstdio>.

2015-10-09 01:29:09 +00:00

stdlib.h

Cleanup foo.h headers and __config to work in C

2015-11-06 06:30:12 +00:00

streambuf

[libc++] Add _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY to support GCC ABI compatibility

2016-09-16 00:00:48 +00:00

string

Revert "Added 'inline' attribute to basic_string's destructor"

2016-10-29 00:50:02 +00:00

string_view

Move 'quoted' for string_view from <string_view> to <iomanip> (where the other versions of 'quoted' live. No functional change.

2016-10-27 15:10:07 +00:00

string.h

Instead of asking glibc to provide correct C++ signatures for <string.h>

2016-02-11 23:51:02 +00:00

strstream

No functionality change at this time. I've split _LIBCPP_VISIBLE up into two flags: _LIBCPP_TYPE_VIS and _LIBCPP_FUNC_VIS. This is in preparation for taking advantage of clang's new __type_visibility__ attribute.

2013-03-06 23:30:19 +00:00

system_error

Implement is_error_code_v and is_error_condition_v for c++17. Rework the tests for is_error_code and is_error_condition, since they were really lacking. Thanks to Alisdair for the heads-up that we were missing these.

2016-09-24 17:36:14 +00:00

tgmath.h

Windows support by Ruben Van Boxem.

2011-10-17 20:05:10 +00:00

thread

[libcxx] Introduce an externally-threaded libc++ variant.

2016-09-11 21:46:40 +00:00

tuple

Implement the std::pair parts of "Improving pair and tuple". Completes N4387.

2016-07-25 04:32:07 +00:00

type_traits

Add void_t and invoke feature test macros

2016-10-14 07:19:52 +00:00

typeindex

Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>.

2013-08-12 18:38:34 +00:00

typeinfo

Fix strict-aliasing violation in typeinfo::hash_code()

2016-10-05 22:55:10 +00:00

unordered_map

[libc++] Fix typos causing compilation errors when _LIBCPP_DEBUG_LEVEL >= 2

2016-09-26 21:39:38 +00:00

unordered_set

Cleanup: move visibility/linkage attributes to the first declaration.

2016-04-22 01:04:55 +00:00

utility

Update issue status for LWG 2744

2016-10-16 02:51:50 +00:00

valarray

Use _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY in valarray to support attribute((internal_linkage)).

2016-09-16 00:13:55 +00:00

vector

[libc++] Fix and document visibility attributes for Clang, GCC and Windows.

2016-09-15 22:27:07 +00:00

wchar.h

Fix overload sets of strchr, strpbrk, strrchr, memchr and strstr from

2016-02-10 00:59:02 +00:00

wctype.h

Split <wctype.h> out of <cwctype>.

2015-10-09 19:57:37 +00:00