--
f3ac7ee28fc7de737bc9e2e1d10ff7739781d645 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 435739199
Change-Id: I8f854b742418a237f9060e4b9f23d0f20baf0bdf

--
fe1329708cb40da8e72e53e4eaad79112bdb79ea by Abseil Team <absl-team@google.com>:

Port SwissTable internals comments from github.com/google/cwisstable to Abseil.

PiperOrigin-RevId: 435719801
Change-Id: I2270cc93aaa5d3d57954a8cea7e570b72b6c3956

--
a6e6fcd4b944ce370ac3307e848645c27bf21e47 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 435716325
Change-Id: I77999f69e176ee6c0d18e7c3329a7c336164f0fc
GitOrigin-RevId: f3ac7ee28fc7de737bc9e2e1d10ff7739781d645

ARM64EC is a Microsoft-designed ARM64 ABI compatible with AMD64
applications on ARM64 Windows 11. The ARM64EC does not support
_umul128 and __rdtsc as x64 intrinsics, though it provides inline
function implementations for them, by emulation. Since the code
already has portable code paths without using the intrinsics,
instead of using the emulated intrinsic implementations, we use
the said portable code paths for ARM64EC.

--
199bdbf9ad253b216ed6c6386bf69bc706330204 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 435425408
Change-Id: I502d21ca5771d14e24fe41b28dc562ea6274996d

--
245a761e96f53857cef9c2359eac9d4bbcfdfd47 by Abseil Team <absl-team@google.com>:

Fix a -Wsign-compare -Wconversion problem in absl::btree discovered while getting cachelib to compile with those flags enabled.

PiperOrigin-RevId: 435419108
Change-Id: I0a9fa53d0163f678dde8960410315a5bc8445c72
GitOrigin-RevId: 199bdbf9ad253b216ed6c6386bf69bc706330204

--
399d051d30f7a78c367bb1dc08829ffacbb619a6 by Abseil Team <absl-team@google.com>:

Fix a glitch in symbolization which could result in the same address being
correctly symbolized and "(unknown)" in the same crash report.

PiperOrigin-RevId: 435371003
Change-Id: I9f6a5684144be6d3d366584601d79fda9eefdce6

--
5dad813de52773e0bb09c6b2351e1bbadb53deac by Abseil Team <absl-team@google.com>:

Fix ABSL_HAVE_MMAP check in direct_mmap.h

This change makes the check for ABSL_HAVE_MMAP match the other checks
in absl. This fixes builds where ABSL_HAVE_MMAP is not defined.

PiperOrigin-RevId: 435190242
Change-Id: I11638ef315849cafcf4ea1611eee1a98c80e7dcb
GitOrigin-RevId: 399d051d30f7a78c367bb1dc08829ffacbb619a6

--
c49308e5361da572b5accdfe664757ca6bf7fed1 by Derek Mauro <dmauro@google.com>:

Disable TestArmThumbOverlap on platforms that don't support it

TestArmThumbOverlap includes a pair of test functions, one built in
arm mode and the other built in thumb mode.

Unfortunately when configured for armv6 hardfloat, gcc refuses to
build any functions in thumb mode (even if they don't actually use
floating point)

Closes #1112

PiperOrigin-RevId: 435078532
Change-Id: I090623d0f89839a5f9dde831756aba5267c9a45c
GitOrigin-RevId: c49308e5361da572b5accdfe664757ca6bf7fed1

--
5dc885f2b62993bccf33a3f3b99f7e460c819c89 by Derek Mauro <dmauro@google.com>:

Remove the internal-only ABSL_INTERNAL_ASSUME now that ABSL_ASSUME
is available and ABSL_INTERNAL_ASSUME has no more users.

Improve the documentation to ABSL_ASSUME somewhat.

PiperOrigin-RevId: 434803125
Change-Id: I7c27418463ffc1c7e10ecd50e2d17f348f686af7

--
4aea19a0ef596228c9136a4c2446e6f25085f23c by Derek Mauro <dmauro@google.com>:

Update documentation to warn against using absl::Hash across
dynamically loaded libraries

Fixes #1128

PiperOrigin-RevId: 434723247
Change-Id: Ib0c7ba03b2cab98b42e19e85be6833192d4b4067
GitOrigin-RevId: 5dc885f2b62993bccf33a3f3b99f7e460c819c89

--
d3b99682554d339c42556680f4d65f83226005e2 by Martijn Vels <mvels@google.com>:

Inline CycleClock code and remove branch for x86 CycleClockSource function

This CL removes the relaxed load for x86 as there is no acquire price to pay on x86. It inlines the UnscaledCycleClock::Now() which is a single RTDSC op for x86, and likewise inlines CycleClock::Now() for x86. The inlining should mostly have secondary benefits such as reducing spills on outlined calls.

LTO may eventually hoist these functions inline for the hotspots, but it doesn't hurt to default inline this for all builds and let the compiler decide on the first pass.

The perlab benchmark is noisy for the plain BM_Now, but the other benchmarks and the run on my local machine are clear.

------------- Local Benchy Benchmark
name                       old cpu/op  new cpu/op  delta
BM_Now                     3.41ns ± 1%  2.30ns ± 2%  -32.52%  (p=0.000 n=50+50)
BM_NowWithRegisterPresure  4.96ns ± 2%  4.19ns ± 2%  -15.57%  (p=0.000 n=56+55)
BM_NowWithCallback         3.30ns ± 2%  1.91ns ± 2%  -42.00%  (p=0.000 n=47+60)

------------- Perflab Benchy Benchmark
name                       old cpu/op  new cpu/op  delta
BM_Now                     8.20ns ±13%  4.32ns ±83%     ~     (p=0.413 n=4+5)
BM_NowWithRegisterPresure  7.91ns ± 1%  3.68ns ± 2%  -53.45%  (p=0.029 n=4+4)
BM_NowWithCallback         2.66ns ±13%  1.58ns ± 0%  -40.51%  (p=0.008 n=5+5)

PiperOrigin-RevId: 434474766
Change-Id: I991d987ae9233e50f09606c874055cf4c5a56300

--
b38330686a0af176a2679163e4d2fa1b90e2f667 by Laramie Leavitt <lar@google.com>:

Style, comment, and test updates

* Remove a redundant assert in uniform_real_distribution.
* Update comment in internal/generate_real.h
* Style updates to uniform_real_distribution_test
   mainly replacing TypeParam with real_type, using aliases for some limits, etc.
* Add a few more minor tests.

PiperOrigin-RevId: 433902174
Change-Id: Id75be8e24be2fb8f6aea05feec13e3ef320a7254

--
ab2da6047ff7f5dae3add3779fcddf73b03feabf by Abseil Team <absl-team@google.com>:

Remove declaration of method whose definition was previously removed.

PiperOrigin-RevId: 433507828
Change-Id: I0130b689813125250f7de2664e767e181f676c89

--
df0c87f4ec2c010691931c1bef9d26470a6e63a2 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 433289136
Change-Id: Iba157dc83ed99dafd17a2223d2504e49f8afbb9e

--
7445fa312f2995772900eda82467325b3401a17d by Martijn Vels <mvels@google.com>:

Optimize CordReader logic now that CONCAT is removed

This CL cleans up various helper functions and logic remaining from previous complex CONCAT logic that is no longer needed, simplifying the CordReader logic.

PiperOrigin-RevId: 433208748
Change-Id: I5f7b1883573c44e7c6f8af12c3cddbd197cb134d
GitOrigin-RevId: d3b99682554d339c42556680f4d65f83226005e2

--
0b01bad05b4cdea647ad274d64af0d6732787a1d by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 433124996
Change-Id: I0a081fb5cbb628901e4913a9c587468ca3b3aaa4
GitOrigin-RevId: 0b01bad05b4cdea647ad274d64af0d6732787a1d

--
3358c3cca1c3770fb5d50e743ac56547af813561 by Dino Radakovic <dinor@google.com>:

Add ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT guard to TEST(Duration, Multiplication)

PiperOrigin-RevId: 432350431
Change-Id: I28a26a12665e3e9a9ebdf50d0249eafa8336c585

--
af631611681a298c305578d5049757ec8ced03ab by Dino Radakovic <dinor@google.com>:

Add config macro for optional skipping absl/time:time_test cases that fail on MSVC optimized builds

PiperOrigin-RevId: 432252533
Change-Id: Ic3879ccdd8e30945a1a2e980e9ae246bcef8d7bd
GitOrigin-RevId: 3358c3cca1c3770fb5d50e743ac56547af813561

--
f2ffea8ae1c1b152b63bf561375cfb6eb6b9dbe5 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 432180490
Change-Id: I5e318e1d06fe26eee08920fe39f8a6285eb8e217

--
e5d0de4b3293833eab3f77252a091ac4ed74b210 by Derek Mauro <dmauro@google.com>:

absl::optional - Add a workaround for an internal compiler error in GCC5 though GCC10

PiperOrigin-RevId: 432047437
Change-Id: I524a9098dadc116d8a423dd66f7ec5ee894f2874
GitOrigin-RevId: f2ffea8ae1c1b152b63bf561375cfb6eb6b9dbe5

--
f0b7d230a90c82c6fee7adcb46a213d2582b6a7b by Martijn Vels <mvels@google.com>:

Optimize substring logic now that CONCAT is removed

This CL adds a static Substring() method to CordRepSubstring, and implements substring logic in cord.cc in terms of the new function. This cleans up various helper functions and logic remaining from previous complex CONCAT logic that is no longer needed.

PiperOrigin-RevId: 431756805
Change-Id: I39c875b5af119916780e68598c7fc619fb2e8476

--
fa7d1bedf0e1244303844869a332c2a5dbd9ac0f by Derek Mauro <dmauro@google.com>:

Allow macro expansion within ABSL_FLAG and ABSL_DECLARE_FLAG args

PiperOrigin-RevId: 431721184
Change-Id: I6e19713fb541205d796f940998db5ee25178d55e

--
1b328badd92304ed1c634f23e1c191be57b7bb15 by Laramie Leavitt <lar@google.com>:

Add #include for std:: types

PiperOrigin-RevId: 431546757
Change-Id: I75efbcd3c77e6f53e4db66494101d30d670d988e

--
e25323b299d4d3840218702860f537cdd2a3926f by Thomas Köppe <tkoeppe@google.com>:

Add hashing support for pointers to member.

Also add tests for function pointers to the existing "pointer" test.

PiperOrigin-RevId: 431067588
Change-Id: I3686010635d9fee34c47a418b72402e10737cdbc

--
ab27b012a61cf10109fd51932b3b0b05ee78f32f by Laramie Leavitt <lar@google.com>:

Avoid use of std::pow in ChiSquare test.

PiperOrigin-RevId: 431015830
Change-Id: Idd767ff2f51009ee171de48757207b38330ffea3

--
28c359135d89061177958580fe4a7493802499cb by Laramie Leavitt <lar@google.com>:

Add #include <type_traits> for std::false_type

PiperOrigin-RevId: 431005757
Change-Id: I85a6a918778601e19512aaea744424cf39018521

--
a920730f23669479d92e3a696d65d0bc3a5b1de1 by Laramie Leavitt <lar@google.com>:

#include <utility> for std::declval

PiperOrigin-RevId: 431004934
Change-Id: I295237b2d44e9a15e4083698ea121b68ce0a1bb7
GitOrigin-RevId: f0b7d230a90c82c6fee7adcb46a213d2582b6a7b

--
7473df9e4922c589f6b27cf546aad097381ae552 by Martijn Vels <mvels@google.com>:

Make ABSL_ASSUME publicly available

PiperOrigin-RevId: 430540224
Change-Id: I760e2d86e3a0b676cd2a6d26e0225a77381e948f

--
c83e38bc421f715b3c1e20150c2f1ffe8e633028 by Abseil Team <absl-team@google.com>:

Alias absl::bind_front to std::bind_front if available

This avoids ambiguity between the two when enabling C++20.

PiperOrigin-RevId: 430486679
GitOrigin-RevId: 7473df9e4922c589f6b27cf546aad097381ae552
Change-Id: I1e9bba09a8946480ce10ddd28e86b6c86191d38c

--
91d76b3ac9edff91f206d9eee60423c39eeeaf93 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 430442277

--
9f8a87bcc5cc5b0fd8b7f0318f37d152fd8bea06 by Evan Brown <ezb@google.com>:

Small refactoring to work towards allowing for node_btree_* containers.

- Change common_params::transfer to rely on slot_policy transfer instead of manually doing construct/destruct. Transfer is not construct/destruct for node containers.
- Move maps' value_compare into btree.h from btree_map.h so it can be reused for node_btree_map.h.
- Also add a test for maps' value_compare protected members.

PiperOrigin-RevId: 430245542

--
0126e0b6295342317d9c9f0a66e2d7009b858426 by Martijn Vels <mvels@google.com>:

Add CordRepSubString::Create function with hard checks on IsFlat() | IsExternal()

This hardens internal invariants, IsFlat() || IsExternal() is a cheap, single predicted branch, and removes boilerplate code from cord.cc

PiperOrigin-RevId: 429676041

--
ed98a92af49d9e238d9f1d1b69fb4eddcd1ccbc7 by Abseil Team <absl-team@google.com>:

tweaks to status.h documentation to reflect general-purpose communication

PiperOrigin-RevId: 429584104
GitOrigin-RevId: 91d76b3ac9edff91f206d9eee60423c39eeeaf93
Change-Id: I54d6d116a564f86a842b983ca76559bf9b388f72

--
ed829ac612f090375427c3488827c6e74deb2e3f by Derek Mauro <dmauro@google.com>:

Update latest GCC/Clang Linux tests to Bazel 5.0.0 and CMake 3.22.2

PiperOrigin-RevId: 429369775

--
76952303c4d942288c4e7657ffb5893cec54a132 by Martijn Vels <mvels@google.com>:

Optimize Cord::ChunkIterator now that CordRepConcat is removed

PiperOrigin-RevId: 429321455

--
dcd0d287793649aba9b98268c5783e449a34749f by Martijn Vels <mvels@google.com>:

Add IsDataEdge() and DataEdgeValue() helper functions.

This moves repetitive logic accessing data edges into its own header, and more strongly defines the notion of what a data edge is, enforcing the internal invariants. This will also be incorporated in optimized Cord iteration logic once CordRepConcat is totally removed from the Cord code.

PiperOrigin-RevId: 429307248

--
6a0903962155988085bf8656743fda9c4cdcba6c by Abseil Team <absl-team@google.com>:

Make it clear that the probability function given for the zipf distribution is unnormalized, i.e., sum(p(x) for x = 0..k) != 100%.

Quoting Section 7 of the paper cited in the comments, where this formula comes from (emphasis mine): "We will consider the two parameter generalization as defined in Dagpunar [1988] with the *unnormalized* probability function ..."

PiperOrigin-RevId: 429068258

--
3899ff6d444ba755148bc521a6ee031d9e9d4485 by Abseil Team <absl-team@google.com>:

Internal Changes

PiperOrigin-RevId: 428644856

--
319de702d2b537cbb76c4c71277ae89b349b162e by Benjamin Barenblat <bbaren@google.com>:

Support symbolization on PA-RISC

Null out supervisor bits in PA-RISC addresses before symbolizing, and
handle function descriptor tables correctly.

Change symbolize_test.cc to use 32-bit aligned addresses, allowing that
test to pass on PA-RISC.

PiperOrigin-RevId: 428590564
GitOrigin-RevId: ed829ac612f090375427c3488827c6e74deb2e3f
Change-Id: Ie01ff3b9365fd45e5a55f858038552679f3180d3

--
ceee18732f9499d3a53d46d5974f12ea0774b900 by Abseil Team <absl-team@google.com>:

Remove division from the profile guided optimization

PiperOrigin-RevId: 428444108

--
fc27059f1b0c0b4cb8ddd9a7a88220af52c0c755 by Evan Brown <ezb@google.com>:

Rename btree_node::leaf to is_leaf and also add is_internal for readability improvements.

PiperOrigin-RevId: 428076422

--
6a90d18477cc3a6de84282b6e38d6f294aa72748 by Evan Brown <ezb@google.com>:

In sanitizer mode, add generation integers to b-tree nodes and iterators and validate that iterators have not been invalidated already when they're used.

Even though generation integers are stored in all nodes, we only use the one stored in the root node for validation. The reason we keep one in all the nodes is that nodes can become a root node after they are allocated.

Also change the order of args in init_leaf to not violate the style guide.

PiperOrigin-RevId: 428054226

--
ede4a0f676f43e7003fd2599c263d55222e760ba by Martijn Vels <mvels@google.com>:

Physically remove CordRepConcat

This CL removes all uses of CordRepConcat. This change is executed by removing all the dead 'btree_enabled()' and 'IsConcat' branches, and all subsequent dead code. This change explicitly does not optimize any of the remaining code other than the most trivial ones such as removing 'stack' loop vars and loops.

PiperOrigin-RevId: 428002308

--
7cc83d96118149cf1aa1258a066b8fd4517df5f6 by Evan Brown <ezb@google.com>:

Change btree_iterator from a struct to a class.

Motivation: btree_iterator has private members and invariants so it should be a class.

Also merge two private sections.

PiperOrigin-RevId: 427768836

--
524d478b0af422e1a867a8823d9fbad149030360 by Martijn Vels <mvels@google.com>:

Physically block the creation of new CordRepConcat nodes.

This change removes CordRepConcat creation, issuing a FATAL errors on the (practically impossible) call path on broken invariants. This change is deliberately limited in impact, subsequent changes will be more voluminous ripping out the (now dead) CordRepConcat code.

PiperOrigin-RevId: 427741022

--
e21eb354c1bb358ea8b64d0e3fbb378e87b8b8c4 by Derek Mauro <dmauro@google.com>:

Update the implementation of ABSL_DEPRECATED to work with GCC, and
recommend using the standard attribute [[deprecated]] for C++14 and newer

GCC users that are experiencing new warnings can silence them with
-Wno-deprecated-declatations.

GCC users that want to see the warnings but not error on them can use
-Wno-error=deprecated-declarations.
PiperOrigin-RevId: 427228952

--
0ab4ee5660f3a072054dc4ab5056925c26977c7a by Laramie Leavitt <lar@google.com>:

Change comment to avoid overflow.

PiperOrigin-RevId: 427090218
GitOrigin-RevId: ceee18732f9499d3a53d46d5974f12ea0774b900
Change-Id: Ida00477b6a3d02a8b7bb467be7621b618385d1e9

--
262f6992ee0553782531ad58dd7d8bcd6d0b7bb7 by Martijn Vels <mvels@google.com>:

Remove CordRepConcat uses in tests and CONCAT constants.

This change removes the creation and uses of CordRepConcat in unit tests, and replaces some remaining CONCAT constants with IsConcat() to make subsequent teardown of CordrepConcat uses easier.

PiperOrigin-RevId: 426932694

--
fd590f7e849ba8c5395c589ed3f762cd00affdc8 by Abseil Team <absl-team@google.com>:

Replace NULL and 0 with nullptr.

PiperOrigin-RevId: 426912932

--
183e5babc478748023f732a1608745a2a544c996 by Abseil Team <absl-team@google.com>:

Replace "span of time" with "amount of time" in the first comment line, to make it clearer that we're not talking about a duration that starts at a specific time.

PiperOrigin-RevId: 426691794

--
e28ca760f21505f1be55c7af336eb61d2f1b7fea by Martijn Vels <mvels@google.com>:

Add extra assertions on CordRepSubstring child nodes

PiperOrigin-RevId: 426369104
GitOrigin-RevId: 262f6992ee0553782531ad58dd7d8bcd6d0b7bb7
Change-Id: I7ffdaa2dc999a2117944c9abdb1565b6b6f48b59

--
4409b08e103d6e7041d18a4d431290cafe3650cf by Derek Mauro <dmauro@google.com>:

Workaround NVCC compile error in StringConstant

Based on a patch in TensorFlow:
https://github.com/tensorflow/tensorflow/blob/da83132aba8d2b6a3c3a9b2e662868eb24f4dd1e/third_party/absl/com_google_absl_fix_mac_and_nvcc_build.patch#L262-L282

Fixes #1105

PiperOrigin-RevId: 426156316

--
25db16567ffc5400dfaa30b567398ede84729687 by Abseil Team <absl-team@google.com>:

Only look for Elf64_Auxinfo on 64-bit FreeBSD.

PiperOrigin-RevId: 426132251

--
2e73c3d9df59b2b769d2b8dca97f0ca5c512c72a by Abseil Team <absl-team@google.com>:

Add a problem hint to the error message when dereferencing the end() iterator.

PiperOrigin-RevId: 426120394

--
6befbf89c47963656b9e8151166ab4c8446d4785 by Martijn Vels <mvels@google.com>:

Make Cord Btree the default and remove opt out machinery

This change makes btree the default Cord format and removes the machinery to opt out. Subsequent changes will remove the 'true' constant evaluation and effectively cleanup all old code and references to CONCAT.

PiperOrigin-RevId: 426119728

--
f6a0a664029d61811d90bd484f4eefa0400b5dd4 by Abseil Team <absl-team@google.com>:

Mark Notification::HasBeenNotified as ABSL_MUST_USE_RESULT

PiperOrigin-RevId: 425927033
GitOrigin-RevId: 4409b08e103d6e7041d18a4d431290cafe3650cf
Change-Id: I86f1052c63c13c6486baf4108de2554f162f9c40

--
121db1a08321eaa3006726cc32b459cf17880e35 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 425707805

--
0dec484389bbb75aae0a412146e3564bf833a739 by Derek Mauro <dmauro@google.com>:

macOS CI: Avoid depending on external sites like GitHub by prepopulating
dependencies and setting --distdir

Our Linux CI does this, but for some reason was never enabled on macOS

PiperOrigin-RevId: 425668638
GitOrigin-RevId: 121db1a08321eaa3006726cc32b459cf17880e35
Change-Id: Id51645df90b6a0808dd5b18eb636a10f798e24ea

--
c475e8ac1ea163248415e7d4bdc05e3c47dd8f3d by Derek Mauro <dmauro@google.com>:

Replace absl::bit_cast with std::bit_cast in C++20

Remove the deprecated implementation that is less-strict than the
standard, and also relies on undefined behavior

PiperOrigin-RevId: 425391711

--
dc97c996aed85161f0e490baafd3ed851e8bea9d by Abseil Team <absl-team@google.com>:

Add enum example for ABSL_DEPRECATED()

PiperOrigin-RevId: 425311634
GitOrigin-RevId: c475e8ac1ea163248415e7d4bdc05e3c47dd8f3d
Change-Id: Id8f159b37fe3f3cace6ab7bce08daf9888c44bcf

--
ef2bdebfdff0a93d3af6248d709d42a47fe2e7b4 by Derek Mauro <dmauro@google.com>:

Compile with -DGTEST_REMOVE_LEGACY_TEST_CASEAPI_ in Bazel CI builds to
prevent uses of the legacy TestCase API from sneaking in

PiperOrigin-RevId: 424882792

--
4cf19d7b4dd855685deb0d4d3170e4db9f6f789b by Abseil Team <absl-team@google.com>:

Fix typo in comment.

PiperOrigin-RevId: 424745867
GitOrigin-RevId: ef2bdebfdff0a93d3af6248d709d42a47fe2e7b4
Change-Id: I50ad9b4cf3fa17831aa6521c58d81b0ce8ec0c47

--
dab53ef01a1c8ceebd1347a4918a0def0d7d4ce5 by Derek Mauro <dmauro@google.com>:

Migrate away from the remaining usages of GoogleTest's legacy TestCase API
and use the new TestSuite API instead

PiperOrigin-RevId: 424668744
GitOrigin-RevId: dab53ef01a1c8ceebd1347a4918a0def0d7d4ce5
Change-Id: I599de09f3349d18c2d74795b1f867fa6c99c3eed

--
7fbe730c56c0890f27df47f9ad4f0cfa600c6ad9 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 424639048

--
1825fcf704e45e881cdd1d2fe3eb2226f523f3cd by Derek Mauro <dmauro@google.com>:

Disable tests Table.EnsureNonQuadraticTopNXorSeedByProbeSeqLength and Table.EnsureNonQuadraticTopNLinearTransformByProbeSeqLength again
as they are (still) flaky

PiperOrigin-RevId: 424616745

--
e624119171d9bceec2f6df023b220a6642070cfb by Abseil Team <absl-team@google.com>:

Switch from *_TEST_CASE_P to *_TEST_SUITE_P gtest macros.

PiperOrigin-RevId: 424404790

--
a110698c10554fb1f640412db8cd7c5a38b7b8e8 by Abseil Team <absl-team@google.com>:

Remove extraneous newline in documentation.

PiperOrigin-RevId: 424328502
GitOrigin-RevId: 7fbe730c56c0890f27df47f9ad4f0cfa600c6ad9
Change-Id: I56fd8c7cecf65fe37cb4cf2dde70842867d637d7

--
505dc83f11dbc14d6e493d83ed6451966629fe71 by Evan Brown <ezb@google.com>:

In debug mode, make b-tree adapt comparators to do checking to diagnose invalid non-strict-weak-ordering comparators.

Reference: https://en.cppreference.com/w/cpp/named_req/Compare

- Add an opt-out mechanism for tests that rely on counting the number of comparisons.
- Use the unadapted comparator (original_key_compare) in making the use_linear_search decision so is_same still works.

PiperOrigin-RevId: 423889350
GitOrigin-RevId: 505dc83f11dbc14d6e493d83ed6451966629fe71
Change-Id: I65b0ba489c69c8dcfb107684db84f3f7f4d72daa

--
75504b9d2eb7560359b98b69136d071f980e04f2 by Abseil Team <absl-team@google.com>:

Fix typos in documentation.

PiperOrigin-RevId: 423376798

--
bf87e5de48a868f49a57d516be027e6e3a3cc3bd by Gennadiy Rozental <rogeeff@google.com>:

Correct WEAK attribute enabling condition.

ABSL_ATTRIBUTE_WEAK is present if:
    compiler has built-in attribute weak
  OR
    we are using gcc (and not clang)
AND
    we are not on windows
  OR
    we use windows clang version >= 9.0.0
AND
  we are not on MinGW

PiperOrigin-RevId: 423357629

--
a01a8f1b7ea3da4ec349db452162a3333953dd9d by Abseil Team <absl-team@google.com>:

There are magic numbers in the expected load factors and probe lengths, and they seem to be wrong especially under msvc.  Even under the linux tool chain, these tests fail occasionally.  Fix the magic numbers to make the tests succeed.

PiperOrigin-RevId: 423320829

--
fd109295a1425ca1cb2b69fe34a294b6189542c0 by Laramie Leavitt <lar@google.com>:

Manually align buffers in randen_engine.

In C++ it's implementation defined whether types with extended alignment are supported.

randen_engine uses vector intrinsics with 16-byte alignment requirements in
some instances, so internally we allocate an extra 8 bytes to manually align to 16.

No detectable performance impact.

PiperOrigin-RevId: 423109265
GitOrigin-RevId: 75504b9d2eb7560359b98b69136d071f980e04f2
Change-Id: I8c5ab2269ff6d9e89d3b4d0e95d36ddb6ce8096e

--
487c7a754a3b93bc0f9de14bdced48007a96ae55 by Greg Falcon <gfalcon@google.com>:

Add support for absl::Hash to hash unordered containers.  These can now be hashed directly, as well as combined in AbslHashValue implementations.

This also adds a new method, `H::combine_unordered()`, to the public AbslHashValue hash state API.  This allows users to implement hash specializations for their own unordered collection types.

A traits class, `H::is_hashable<T>`, is also added to the hash state API.  H::is_hashable<T>::value reflects whether type T is considered hashable by the AbslHashValue framework.  This allows users to properly SFINAE templated versions of AbslHashValue.  (The AbslHashValue implementation added to raw_hash_set shows an example of its use.)

PiperOrigin-RevId: 422856706
GitOrigin-RevId: 487c7a754a3b93bc0f9de14bdced48007a96ae55
Change-Id: Id31fd4ccba282f8c9ae6fcee6ae0ad0f7879f456

--
7f5caec21a1a88db6486b8bc2e5f6d5baba076ed by Derek Mauro <dmauro@google.com>:

Tag absl::StatusOr with [[nodiscard]] when it is available

[[nodiscard]] provides better diagnostics on classes than the current
ABSL_MUST_USE_RESULT, which expands to
__attribute__((warn_unused_result))

Ideally we would make ABSL_MUST_USE_RESULT expand to [[nodiscard]], but
we would need to fix all code to build with [[nodiscard]] first.

PiperOrigin-RevId: 422628161

--
236be69f0f34ccaa3adc831075613847797e6557 by Jorg Brown <jorg@google.com>:

Make sure all of absl/strings compiles even with -Wsign-compare and -Wconversion warnings.

PiperOrigin-RevId: 422573904

--
005669883a8794e6d19dc4bbb4f0e18032e2fbc9 by Chris Kennelly <ckennelly@google.com>:

Include sampling stride in hashtable sampling data.

This allows us to weight each sample to control for our sampling rate.

PiperOrigin-RevId: 421886935

--
78046ce6b429b9f5b6c97b05e8448a791db93bbe by Abseil Team <absl-team@google.com>:

Use __builtin_bit_cast for absl::bit_cast when possible

This makes absl::bit_cast match the requirements of the standard when compiler support exists.

PiperOrigin-RevId: 421883999

--
f397461f4bbeabd32437df0f2275663aeb51adb2 by Derek Mauro <dmauro@google.com>:

Tag absl::Status with [[nodiscard]] when it is available

[[nodiscard]] provides better diagnostics on classes than the current
ABSL_MUST_USE_RESULT, which expands to
__attribute__((warn_unused_result))

Ideally we would make ABSL_MUST_USE_RESULT expand to [[nodiscard]], but
we would need to fix all code to build with [[nodiscard]] first.

PiperOrigin-RevId: 421825565
GitOrigin-RevId: 7f5caec21a1a88db6486b8bc2e5f6d5baba076ed
Change-Id: I760b45b68f6012809c70c2a584e4144a99f98733

--
0db7f4046f9b59c0f8c3df2f0eb7fd88fc328439 by Abseil Team <absl-team@google.com>:

Revise documentation of bit_cast:

* Removes inappropriate examples (round-tripping pointers, serialization), for which reinterpret_cast is more appropriate.
* Removes mention of "bit representation", which is not an explicit notion in C++. The best we get is "byte representation".
* Removes a circular defition of "bitcast" as itself, and instead explains what it does.
* Removes the mathism "for some values of", which is probably not totally accessible to a general audience, and in any case needless verbiage.
* Fixes comments in the example.
* Replaces some colloquialisms with simpler, more direct language.

PiperOrigin-RevId: 421791786

--
e04e64df55d93c1b9a09c0483b97cc4d8763260d by Derek Mauro <dmauro@google.com>:

Update Docker image to use GCC 11.2, Clang 14 (prerelease),
CMake 3.22.1, and Bazel 4.2.2

PiperOrigin-RevId: 421658559

--
d002bb3dc5cd1fc5b4cbd79a450efc894caa567c by Chris Kennelly <ckennelly@google.com>:

Add a small microbenchmark for absl::bit_width.

PiperOrigin-RevId: 421604852

--
131b057d1b76ecd7170421b48d661bb958ff676b by Evan Brown <ezb@google.com>:

Adds a disabled test for EBO in nested `CompressedTuple`s.

PiperOrigin-RevId: 421413134

--
e34c7876d3a1212d90c73c030ccae6169b682d43 by Jorg Brown <jorg@google.com>:

Show users a better error message if they pass a pointer to absl::Uniform.

PiperOrigin-RevId: 421090472
GitOrigin-RevId: 0db7f4046f9b59c0f8c3df2f0eb7fd88fc328439
Change-Id: I5a004e8d17e974fa4897a09d1466ae8fc65dfdbb

--
389189dbb322df0d0468ab13edf7dc185dc63833 by Abseil Team <absl-team@google.com>:

absl str_format.h can compile with -Wconversion and -Wsign-compare

PiperOrigin-RevId: 420799960

--
762e5adc429fc143756c42fe92fe8073c87c075f by Abseil Team <absl-team@google.com>:

GetStackTraceWithContext: Fix min_dropped_frames when no frames are recorded

Previously, if there were still frames to skip, they would be included
in min_dropped_frames.

PiperOrigin-RevId: 420766341

--
7d4374b8eaa410f4f98ec03d6a8997dccadfb271 by Abseil Team <absl-team@google.com>:

absl::flags compiles with -Wconversion and -Wsign-compare

PiperOrigin-RevId: 420476807

--
5f00f7805419d725fa1ff57b388e4c0750d1d6b0 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 420282152

--
bd5471fc34956acf3888bf90287b2aee4415c96d by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 420282033

--
61c78020804e4290e9b2fe151aeaf99b198716ee by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 420281867

--
dbe3aad24b65ea11664401a307ea3d2f28e8a7b9 by Derek Mauro <dmauro@google.com>:

Remove the incorrect test for the availability of [[nodiscard]]

It should have been ABSL_HAVE_CPP_ATTRIBUTE(nodiscard) instead of
ABSL_HAVE_ATTRIBUTE(nodiscard). As a result, some code is not
compliant with [[nodiscard]], so we cannot simply correct the availability
test.

Recommend that C++17-only code use the standard [[nodiscard] directly.

PiperOrigin-RevId: 420150702
GitOrigin-RevId: 389189dbb322df0d0468ab13edf7dc185dc63833
Change-Id: Idf6ebae3c4edd945c9032c7db3d0ab32d16e8078

fixes #970

An external project may depend on an Abseil `TESTONLY` library like
`absl::random_mocking_bit_gen`.  Such a library should not be excluded
from build when Abseil's own tests are not built.

fixes #997

* cmake: use target aliases from local Google Test checkout.

`ABSL_FIND_GOOGLETEST` is a dependent option, it is always `OFF` when
`ABSL_USE_EXTERNAL_GOOGLETEST` is `OFF` (i.e. when Google Test is
checked out locally).

`GTest::` target aliases are to be added only if `find_package(GTest)`
has been actually used.

* cmake: clarify adding GTest:: aliases.

--
04e8fdf6a37d31f9364ca0f70bf663ee972481c6 by Abseil Team <absl-team@google.com>:

Another implicit sign conversion found and removed.

PiperOrigin-RevId: 419718762

--
dbb6bca7d3cfa9ce79e70d0ed3d0354a4e3a0983 by Abseil Team <absl-team@google.com>:

Fix sign conversions so that absl/status/status.h can compile with -Wconversion -Wsign-compare

PiperOrigin-RevId: 419658075
GitOrigin-RevId: 04e8fdf6a37d31f9364ca0f70bf663ee972481c6
Change-Id: I18441488cc84f573c2818ee241c387e1953d5105

--
620668e56950d7cfc39db2cd321adf265199ad77 by Abseil Team <absl-team@google.com>:

absl::random compiles (at least for some cases) with -Wconversion -Wsign-compare

PiperOrigin-RevId: 419595521

--
746651e5fbcab6080d25c4eef8617fc289a448f6 by Abseil Team <absl-team@google.com>:

Annotate FlagImpl storage buffer

Flag type can contain legit uninitialized bits, e.g. padding.
When the code calls bit_cast as int64_t, it will contain those bits as well.
Then when we pass the int into the store it's UB for C++ and will be
reported by the new msan.

PiperOrigin-RevId: 418666492
GitOrigin-RevId: 620668e56950d7cfc39db2cd321adf265199ad77
Change-Id: Idd1190f5c98a0a13c4019f3d92cec0313822084c

--
3fad46c668edd864a62511f2a6875b8b79e38f34 by Evan Brown <ezb@google.com>:

Use switches instead of lookup tables for zap_desig_waker and ignore_waiting_writers so that we can avoid dTLB misses.

See, e.g., https://godbolt.org/z/a7Gb9vzzj.

Also, now that these are functions, follow function style in naming and comments.

PiperOrigin-RevId: 418654693

--
ba5107744023a4e9163a44d706fbe8e4a1bc0fd9 by Abseil Team <absl-team@google.com>:

Check for Clang before attempting to expand __clang_major__.

This avoids a warning about an undefined macro on Windows when compiling with
MinGW-GCC.

PiperOrigin-RevId: 418287329
GitOrigin-RevId: 3fad46c668edd864a62511f2a6875b8b79e38f34
Change-Id: I28104980c4d3b204537b248447a6bd1022c9ef5d

--
cca8a0c0d709803ce3413861ccbdb1b47e8fdcef by Abseil Team <absl-team@google.com>:

Add AssertHeld() to SpinLock.

PiperOrigin-RevId: 418034654

--
9e95a0e614b4cd7929d8db4324ca69d7be5351b2 by Evan Brown <ezb@google.com>:

Make btree use an unsigned size_type (size_t).

This brings btree in line with std::set, et al., which are required to use an unsigned size type - see https://en.cppreference.com/w/cpp/container/set.

Also avoid some warnings about comparing integers of different signs.

PiperOrigin-RevId: 418014466
GitOrigin-RevId: cca8a0c0d709803ce3413861ccbdb1b47e8fdcef
Change-Id: I2b951cf1d69a3bb9c8dc236c69ab4a06b45047ea

--
1e25fb5996193524bf2f75781f1e6bdcdf972a3a by Gennadiy Rozental <rogeeff@google.com>:

Introduce enums to represent lower and upper thresholds for LogSeverity.

PiperOrigin-RevId: 417414673

--
abfddb3a6ad8ce4849fbb6dadb34d7d6295def0f by Abseil Team <absl-team@google.com>:

Restore __arch64__ macro check for SPARC

PiperOrigin-RevId: 416798208

PiperOrigin-RevId: 416688543
GitOrigin-RevId: 1e25fb5996193524bf2f75781f1e6bdcdf972a3a
Change-Id: I424dd98e5e07420d5f9dfd191f2bfc06036e2bd1