Upstream bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105705

PiperOrigin-RevId: 454937873
Change-Id: I44f940caf36d83714af765f01cc43c5143fe21c3

PiperOrigin-RevId: 454934969
Change-Id: Ia4c157133e73ff16390179b37f7a789fc03fa92e

PiperOrigin-RevId: 454932630
Change-Id: Ifc716552bb0cd7babcaf416fe28462c15b4c7f23

contain the requested zone.

And now that we have a fallback at all, remove the special case that
allowed for testing absl::LocalTimeZone() under TZ=US/Pacific.

And we might as well update the existing embedded data while we're here.

This is modifying the test framework only.

PiperOrigin-RevId: 454896078
Change-Id: I3ec8391a5a51fe1e86a14f39d57ed6dac89d5905

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Change-Id: I528dfe0223280c379d8791373dc2871ad5812f63

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Change-Id: I256b7a662478f9317a4133ec209fa5488a942886

PiperOrigin-RevId: 454185620
Change-Id: Ifdff33cec4bdd63f160a8d3c18f959ac2a3b6f25

The intent of the macro is to say what locks cannot be held when calling the method, not making a promise that they will be acquired.

PiperOrigin-RevId: 454158686
Change-Id: I71087460c3df27c7d6e0571156f19f525024f1de

PiperOrigin-RevId: 453970585
Change-Id: Iac23eb88ea676efc822f001020b1cc2c255dbbc1

This change introduces the symbol
ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
to guard redundant declarations of static constexpr data
members that are needed prior to C++17.

This change also introduces the symbol
ABSL_INTERNAL_CPLUSPLUS_LANG, which is supposed to be set
to the same value as __cplusplus, except it uses _MSVC_LANG
on MSVC so that the value is correct on MSVC.

Neither of these new symbols should be used outside of Abseil.

Fixes #1191

PiperOrigin-RevId: 453923908
Change-Id: I1316c52c19fa0c168b93cced0c817e4cb7c9c862

https://pastebin.com/fDvgWgHe

After having a chat with Dougall Johnson (https://twitter.com/dougallj/status/1534213050944802816), we realized that __clzll works with zero arguments per documentation:

https://developer.arm.com/documentation/101028/0009/Data-processing-intrinsics

```
Returns the number of leading zero bits in x. When x is zero it returns the argument width, i.e. 32 or 64.
```

Codegen improves https://godbolt.org/z/ebadf717Y

Thus we can use a little bit different construction not involving CLS but using more understandable CLZ and removing some operations.

PiperOrigin-RevId: 453879080
Change-Id: Ie2d7f834f63364d7bd50dd6a682c107985f21942

PiperOrigin-RevId: 453766125
Change-Id: Id4d88ae20bdadc960a65bc1010eea746f1eba051

When we would perform a stacktrace using the frame pointer walking, because we
did the adjustment for the return address separately, we were misaligning the
stack size and frame.  Simplify the logic and correct the offset.

The recovered frame pointer provides us with the return address of the current
frame and the previous frame's frame pointer.  Subsequently, we decide if we
want to record this frame or not.  The value in `next_frame_pointer` already
points to the value from the previous stack frame (that is the next frame
pointer to iterate).  As such, the value computed by `ComputeStackFrameSize` is
the value for the current frame.  This was offset by one previously.

Take the opportunity to clean up some of the local comments, fixing typos and
splitting up the comments to reflect the lines that they are associated with.

PiperOrigin-RevId: 453744059
Change-Id: If14813e0ac36f327f4b7594472f2222d05c478aa

PiperOrigin-RevId: 453455549
Change-Id: Ib7c3d843d537e30d4086428dad539d162357308e

PiperOrigin-RevId: 453429588
Change-Id: Id377cd89dc807da80a33a8549f4e59bd935aff93

A few targets were missing `linkopts = ...` and so were not obeying
the project-wide default settings.

Omit any changes to cctz for now, because it's vendored from another project.

For portability, absl_time_test builds a small, incomplete tzdata
database into the test binary and uses that instead of the system tzdata
database. (absl_time_test needs to run on some platforms that lack a
system tzdata database.) However, this causes issues if TZ is set to
something that isn’t in the test database. To address them, fall back to
America/Los_Angeles if TZ is set to an unknown value during testing.

Bug: https://bugs.debian.org/1012194
PiperOrigin-RevId: 453257912
Change-Id: I293d0f96876b31c32a2847468a3377bb49f3aa15

CordBuffer::IncreaseLengthBy()

PiperOrigin-RevId: 453243686
Change-Id: If109da6be651006d4d9820bcc10eddfb56deaea2

PiperOrigin-RevId: 453241556
Change-Id: Ia92d737b6a678e3a4eda965056503392af44486a

Avoid using value move/swap and delete those functions from slot_policy types. There was only one use of params_type::move in `erase`.

PiperOrigin-RevId: 453237739
Change-Id: Ie81c6dba6c4db34e97a067d2c0defcded8044a5a

https://pastebin.com/CmnzwUFN

The key idea is to avoid using 16 byte NEON and use 8 byte NEON which has lower latency for BitMask::Match. Even though 16 byte NEON achieves higher throughput, in SwissMap it's very important to catch these Matches with low latency as probing on average happens at most once.

I also introduced NonIterableMask as ARM has really great cbnz instructions and additional AND on scalar mask had 1 extra latency cycle

PiperOrigin-RevId: 453216147
Change-Id: I842c50d323954f8383ae156491232ced55aacb78

absl::CordBuffer holds data for eventual inclusion within an existing
absl::Cord. CordBuffers are useful for building large Cords that may
require custom allocation of its associated memory, a pattern that is
common in zero-copy APIs.
PiperOrigin-RevId: 453212229
Change-Id: I6a8adc3a8d206691cb1b0001a9161e5080dd1c5f

Due to changes in GCC 12, without this change, the warning fires

PiperOrigin-RevId: 453197246
Change-Id: I2e31cbff1707ab09868cf77dcf040b033984e654

The "deleted" overload error is useless to users. By passing some dummy string to the base class constructor we use a valid constructor and remove the unintended use of the deleted default constructor.

PiperOrigin-RevId: 452826509
Change-Id: I5430a373c8e7e3a13336d2c42899e0e59444620b

PiperOrigin-RevId: 452619005
Change-Id: I6c120f9e7bbabe3b00821adc441608ae9118bee6

Include proper #includes for POSIX thread identity implementation when using that implementation on MinGW.

Fixes #1124

PiperOrigin-RevId: 452596638
Change-Id: Iab34b8e112dc050ffe346a418fa7b499983f0dcf

Decompose RandenPoolSeedSeq from NonsecureURBGBase.

Adjust how the RandenPoolSeedSeq detects contiguous buffers passed to the generate function. Previously it made incorrect assumptions regarding the contiguous concept, which have been replaced with some type-based tests for a small number of known contiguous random access iterator types, including raw pointers.

PiperOrigin-RevId: 452564114
Change-Id: Idab1df9dd078d8e5c565c7fa7ccb9c0d3d392ad2

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Change-Id: I45d80b220c0450d27423bb23504e95c25811877b

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Change-Id: I7d2a19d1206aa08fce131bacda461fdefebe8713

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Change-Id: Ia5515eae52502ca0b79c7e7dff0a57aa5899e354

PiperOrigin-RevId: 452134803
Change-Id: I8660df850ab537c441399545b25eb32399b2a3ef

PiperOrigin-RevId: 452110436
Change-Id: I3cb870935932c7e2895c8a7f019f375ad707ee77

PiperOrigin-RevId: 452108013
Change-Id: I71fa7bc792d34327680dc3daa96a8d6d4116b49a

Allow for using b-tree with `value_type`s that can only be constructed by the allocator (ignoring copy/move constructors).

We were using `init_type`s for temp values that we would move into slots, but in this case, we need to have actual slots. We use node handles for managing slots outside of nodes.

Also, in btree::copy_or_move_values_in_order, pass the slots from the iterators rather than references to values. This allows for moving from map keys instead of copying for standard layout types.

In the test, fix a couple of ClangTidy warnings from missing includes and calling `new` instead of `make_unique`.

PiperOrigin-RevId: 452062967
Change-Id: I870e89ae1aa5b3cfa62ae6e75b73ffc3d52e731c

Timeouts were once necessary when the SpinLock Unlock used an atomic
store and could therefore have a race and a missed wakeup, however,
the Unlock path now uses an atomic exchange, so the missed wakeup
cannot happen.

Fixes #1179

PiperOrigin-RevId: 452047517
Change-Id: I844944879b51b7f7ddac148e063a376cddd0d05a

PiperOrigin-RevId: 451979149
Change-Id: Ic9b02306f2c5324b6648989a895f128c9eb5743d

This fixes an overload that is ambiguous for some toolchains, because
0U does not always refer to a uint32_t (on some toolchains, uint32_t
is an unsigned long).

PiperOrigin-RevId: 451962182
Change-Id: Id13700817ea3eb6d04e2cc02f20726040eb447fb

Without the change absl-cpp build fails on this week's gcc-13 snapshot as:

    /build/abseil-cpp/absl/strings/internal/str_format/extension.h:34:33: error: found ':' in nested-name-specifier, expected '::'
       34 | enum class FormatConversionChar : uint8_t;
          |                                 ^
          |                                 ::

PiperOrigin-RevId: 451434783
Change-Id: I572e77a67e18e8dd530bf0347c76863c9bb1946f