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branch	1.1.1;
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	FSF:1.1.1;
locks; strict;
comment	@ * @;


1.1
date	2020.09.05.07.52.10;	author mrg;	state Exp;
branches
	1.1.1.1;
next	;
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1.1.1.1
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1.1.1.2
date	2021.04.10.22.10.04;	author mrg;	state Exp;
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1.1.1.3
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1.1.1.4
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desc
@@


1.1
log
@Initial revision
@
text
@// -*- C++ -*-
//===-- utils.h -----------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef __PSTL_utils_H
#define __PSTL_utils_H

#include <new>
#include <iterator>

namespace __pstl
{
namespace __internal
{

template <typename _Fp>
typename std::result_of<_Fp()>::type
__except_handler(_Fp __f)
{
    try
    {
        return __f();
    }
    catch (const std::bad_alloc&)
    {
        throw; // re-throw bad_alloc according to the standard [algorithms.parallel.exceptions]
    }
    catch (...)
    {
        std::terminate(); // Good bye according to the standard [algorithms.parallel.exceptions]
    }
}

template <typename _Fp>
void
__invoke_if(std::true_type, _Fp __f)
{
    __f();
}

template <typename _Fp>
void
__invoke_if(std::false_type, _Fp __f)
{
}

template <typename _Fp>
void
__invoke_if_not(std::false_type, _Fp __f)
{
    __f();
}

template <typename _Fp>
void
__invoke_if_not(std::true_type, _Fp __f)
{
}

template <typename _F1, typename _F2>
typename std::result_of<_F1()>::type
__invoke_if_else(std::true_type, _F1 __f1, _F2 __f2)
{
    return __f1();
}

template <typename _F1, typename _F2>
typename std::result_of<_F2()>::type
__invoke_if_else(std::false_type, _F1 __f1, _F2 __f2)
{
    return __f2();
}

//! Unary operator that returns reference to its argument.
struct __no_op
{
    template <typename _Tp>
    _Tp&&
    operator()(_Tp&& __a) const
    {
        return std::forward<_Tp>(__a);
    }
};

//! Logical negation of a predicate
template <typename _Pred>
class __not_pred
{
    _Pred _M_pred;

  public:
    explicit __not_pred(_Pred __pred) : _M_pred(__pred) {}

    template <typename... _Args>
    bool
    operator()(_Args&&... __args)
    {
        return !_M_pred(std::forward<_Args>(__args)...);
    }
};

template <typename _Pred>
class __reorder_pred
{
    _Pred _M_pred;

  public:
    explicit __reorder_pred(_Pred __pred) : _M_pred(__pred) {}

    template <typename _FTp, typename _STp>
    bool
    operator()(_FTp&& __a, _STp&& __b)
    {
        return _M_pred(std::forward<_STp>(__b), std::forward<_FTp>(__a));
    }
};

//! "==" comparison.
/** Not called "equal" to avoid (possibly unfounded) concerns about accidental invocation via
    argument-dependent name lookup by code expecting to find the usual std::equal. */
class __pstl_equal
{
  public:
    explicit __pstl_equal() {}

    template <typename _Xp, typename _Yp>
    bool
    operator()(_Xp&& __x, _Yp&& __y) const
    {
        return std::forward<_Xp>(__x) == std::forward<_Yp>(__y);
    }
};

//! "<" comparison.
class __pstl_less
{
  public:
    explicit __pstl_less() {}

    template <typename _Xp, typename _Yp>
    bool
    operator()(_Xp&& __x, _Yp&& __y) const
    {
        return std::forward<_Xp>(__x) < std::forward<_Yp>(__y);
    }
};

//! Like a polymorphic lambda for pred(...,value)
template <typename _Tp, typename _Predicate>
class __equal_value_by_pred
{
    const _Tp& _M_value;
    _Predicate _M_pred;

  public:
    __equal_value_by_pred(const _Tp& __value, _Predicate __pred) : _M_value(__value), _M_pred(__pred) {}

    template <typename _Arg>
    bool
    operator()(_Arg&& __arg)
    {
        return _M_pred(std::forward<_Arg>(__arg), _M_value);
    }
};

//! Like a polymorphic lambda for ==value
template <typename _Tp>
class __equal_value
{
    const _Tp& _M_value;

  public:
    explicit __equal_value(const _Tp& __value) : _M_value(__value) {}

    template <typename _Arg>
    bool
    operator()(_Arg&& __arg) const
    {
        return std::forward<_Arg>(__arg) == _M_value;
    }
};

//! Logical negation of ==value
template <typename _Tp>
class __not_equal_value
{
    const _Tp& _M_value;

  public:
    explicit __not_equal_value(const _Tp& __value) : _M_value(__value) {}

    template <typename _Arg>
    bool
    operator()(_Arg&& __arg) const
    {
        return !(std::forward<_Arg>(__arg) == _M_value);
    }
};

template <typename _ForwardIterator, typename _Compare>
_ForwardIterator
__cmp_iterators_by_values(_ForwardIterator __a, _ForwardIterator __b, _Compare __comp)
{
    if (__a < __b)
    { // we should return closer iterator
        return __comp(*__b, *__a) ? __b : __a;
    }
    else
    {
        return __comp(*__a, *__b) ? __a : __b;
    }
}

} // namespace __internal
} // namespace __pstl

#endif /* __PSTL_utils_H */
@


1.1.1.1
log
@initial import of GCC 9.3.0.  changes include:

- live patching support
- shell completion help
- generally better diagnostic output (less verbose/more useful)
- diagnostics and optimisation choices can be emitted in json
- asan memory usage reduction
- many general, and specific to switch, inter-procedure,
  profile and link-time optimisations.  from the release notes:
  "Overall compile time of Firefox 66 and LibreOffice 6.2.3 on
  an 8-core machine was reduced by about 5% compared to GCC 8.3"
- OpenMP 5.0 support
- better spell-guesser
- partial experimental support for c2x and c++2a
- c++17 is no longer experimental
- arm AAPCS GCC 6-8 structure passing bug fixed, may cause
  incompatibility (restored compat with GCC 5 and earlier.)
- openrisc support
@
text
@@


1.1.1.2
log
@initial import of GCC 10.3.0.  main changes include:

caveats:
- ABI issue between c++14 and c++17 fixed
- profile mode is removed from libstdc++
- -fno-common is now the default

new features:
- new flags -fallocation-dce, -fprofile-partial-training,
  -fprofile-reproducible, -fprofile-prefix-path, and -fanalyzer
- many new compile and link time optimisations
- enhanced drive optimisations
- openacc 2.6 support
- openmp 5.0 features
- new warnings: -Wstring-compare and -Wzero-length-bounds
- extended warnings: -Warray-bounds, -Wformat-overflow,
  -Wrestrict, -Wreturn-local-addr, -Wstringop-overflow,
  -Warith-conversion, -Wmismatched-tags, and -Wredundant-tags
- some likely C2X features implemented
- more C++20 implemented
- many new arm & intel CPUs known

hundreds of reported bugs are fixed.  full list of changes
can be found at:

   https://gcc.gnu.org/gcc-10/changes.html
@
text
@d10 2
a11 2
#ifndef _PSTL_UTILS_H
#define _PSTL_UTILS_H
d222 1
a222 1
#endif /* _PSTL_UTILS_H */
@


1.1.1.3
log
@initial import of GCC 12.3.0.

major changes in GCC 11 included:

- The default mode for C++ is now -std=gnu++17 instead of -std=gnu++14.
- When building GCC itself, the host compiler must now support C++11,
  rather than C++98.
- Some short options of the gcov tool have been renamed: -i to -j and
  -j to -H.
- ThreadSanitizer improvements.
- Introduce Hardware-assisted AddressSanitizer support.
- For targets that produce DWARF debugging information GCC now defaults
  to DWARF version 5. This can produce up to 25% more compact debug
  information compared to earlier versions.
- Many optimisations.
- The existing malloc attribute has been extended so that it can be
  used to identify allocator/deallocator API pairs. A pair of new
  -Wmismatched-dealloc and -Wmismatched-new-delete warnings are added.
- Other new warnings:
  -Wsizeof-array-div, enabled by -Wall, warns about divisions of two
    sizeof operators when the first one is applied to an array and the
    divisor does not equal the size of the array element.
  -Wstringop-overread, enabled by default, warns about calls to string
    functions reading past the end of the arrays passed to them as
    arguments.
  -Wtsan, enabled by default, warns about unsupported features in
    ThreadSanitizer (currently std::atomic_thread_fence).
- Enchanced warnings:
  -Wfree-nonheap-object detects many more instances of calls to
    deallocation functions with pointers not returned from a dynamic
    memory allocation function.
  -Wmaybe-uninitialized diagnoses passing pointers or references to
    uninitialized memory to functions taking const-qualified arguments.
  -Wuninitialized detects reads from uninitialized dynamically
    allocated memory.
  -Warray-parameter warns about functions with inconsistent array forms.
  -Wvla-parameter warns about functions with inconsistent VLA forms.
- Several new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++20 features have been implemented.
- The C++ front end has experimental support for some of the upcoming
  C++23 draft.
- Several new C++ warnings.
- Enhanced Arm, AArch64, x86, and RISC-V CPU support.
- The implementation of how program state is tracked within
  -fanalyzer has been completely rewritten with many enhancements.

see https://gcc.gnu.org/gcc-11/changes.html for a full list.

major changes in GCC 12 include:

- An ABI incompatibility between C and C++ when passing or returning
  by value certain aggregates containing zero width bit-fields has
  been discovered on various targets. x86-64, ARM and AArch64
  will always ignore them (so there is a C ABI incompatibility
  between GCC 11 and earlier with GCC 12 or later), PowerPC64 ELFv2
  always take them into account (so there is a C++ ABI
  incompatibility, GCC 4.4 and earlier compatible with GCC 12 or
  later, incompatible with GCC 4.5 through GCC 11). RISC-V has
  changed the handling of these already starting with GCC 10. As
  the ABI requires, MIPS takes them into account handling function
  return values so there is a C++ ABI incompatibility with GCC 4.5
  through 11.
- STABS: Support for emitting the STABS debugging format is
  deprecated and will be removed in the next release. All ports now
  default to emit DWARF (version 2 or later) debugging info or are
  obsoleted.
- Vectorization is enabled at -O2 which is now equivalent to the
  original -O2 -ftree-vectorize -fvect-cost-model=very-cheap.
- GCC now supports the ShadowCallStack sanitizer.
- Support for __builtin_shufflevector compatible with the clang
  language extension was added.
- Support for attribute unavailable was added.
- Support for __builtin_dynamic_object_size compatible with the
  clang language extension was added.
- New warnings:
  -Wbidi-chars warns about potentially misleading UTF-8
    bidirectional control characters.
  -Warray-compare warns about comparisons between two operands of
    array type.
- Some new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++23 features have been implemented.
- Many C++ enhancements across warnings and -f options.

see https://gcc.gnu.org/gcc-12/changes.html for a full list.
@
text
@d14 1
a14 1
#include <type_traits>
d35 1
a35 1
        std::__terminate(); // Good bye according to the standard [algorithms.parallel.exceptions]
@


1.1.1.4
log
@initial import of GCC 14.3.0.

major changes in GCC 13:
- improved sanitizer
- zstd debug info compression
- LTO improvements
- SARIF based diagnostic support
- new warnings: -Wxor-used-as-pow, -Wenum-int-mismatch, -Wself-move,
  -Wdangling-reference
- many new -Wanalyzer* specific warnings
- enhanced warnings: -Wpessimizing-move, -Wredundant-move
- new attributes to mark file descriptors, c++23 "assume"
- several C23 features added
- several C++23 features added
- many new features for Arm, x86, RISC-V

major changes in GCC 14:
- more strict C99 or newer support
- ia64* marked deprecated (but seemingly still in GCC 15.)
- several new hardening features
- support for "hardbool", which can have user supplied values of true/false
- explicit support for stack scrubbing upon function exit
- better auto-vectorisation support
- added clang-compatible __has_feature and __has_extension
- more C23, including -std=c23
- several C++26 features added
- better diagnostics in C++ templates
- new warnings: -Wnrvo, Welaborated-enum-base
- many new features for Arm, x86, RISC-V
- possible ABI breaking change for SPARC64 and small structures with arrays
  of floats.
@
text
@d22 2
a23 2
auto
__except_handler(_Fp __f) -> decltype(__f())
d47 2
a48 1
void __invoke_if(std::false_type, _Fp)
d60 2
a61 1
void __invoke_if_not(std::true_type, _Fp)
d66 2
a67 2
auto
__invoke_if_else(std::true_type, _F1 __f1, _F2) -> decltype(__f1())
d73 2
a74 2
auto
__invoke_if_else(std::false_type, _F1, _F2 __f2) -> decltype(__f2())
d90 17
d123 30
@