Changes

[clangd] Drop returntype/type when hovering over type-ish names
Summary: Some names, e.g. constructor/destructor/conversions, already
contain the type info, no need to duplicate them in the hoverinfo.
Fixes https://github.com/clangd/clangd/issues/252
Reviewers: sammccall, ilya-biryukov
Subscribers: MaskRay, jkorous, arphaman, usaxena95, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D73110

Update spelling of {analyze,insert,remove}Branch in strings and comments
These names have been changed from CamelCase to camelCase, but there
were many places (comments mostly) that still used the old names.
This change is NFC.

[Clang] Un-break scan-build after integrated-cc1 change
Differential Revision: https://reviews.llvm.org/D72982

[mlir][spirv] Simplify scalar type size calculation.
Simplify scalar type size calculation and reject boolean memrefs.
Differential Revision: https://reviews.llvm.org/D72999

[libcxx] Support Python 3.8 in the test suite
Summary: `platform.linux_distribution()` has been deprecated in Python
3.5 and removed in Python 3.8.
Reviewers: bcain, bcraig, jroelofs, EricWF, mclow.lists, ldionne
Reviewed By: jroelofs
Subscribers: dexonsmith, christof, ldionne, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D72501

[Hexagon] Add support for Hexagon v67t microarchitecture (tiny core)

[lldb/Initializers] Move all macOS initializers into PlatformMacOSX
PlatformMacOSX is the main entry point to the plugin with the same name. 
This is part of a greater refactoring to auto generate the initializers.
Differential revision: https://reviews.llvm.org/D73116

[HIP] use GetProgramPath for executable discovery
This change replaces the manual building of executable paths using
llvm::sys::path::append with GetProgramPath. This enables adding other
paths in case executables reside in different directories and makes the
code easier to read.
Differential Revision: https://reviews.llvm.org/D72903

[FPEnv][SystemZ] Platform-specific builtin constrained FP enablement
When constrained floating point is enabled the SystemZ-specific builtins 
don't use constrained intrinsics in some cases. Fix that.
Differential Revision: https://reviews.llvm.org/D72722

[StackColoring] Remap PseudoSourceValue frame indices via
MachineFunction::getPSVManager()
Reviewed By: dantrushin
Differential Revision: https://reviews.llvm.org/D73063

[lldb/Hexagon] Include <mutex>
Fixes compiler error on macOS: error: no type named 'mutex' in namespace
'std'.

[PowerPC] Delete PPCSubtarget::isDarwin and isDarwinABI
http://lists.llvm.org/pipermail/llvm-dev/2018-August/125614.html
developers have agreed to remove Darwin support from POWER backends.
Reviewed By: sfertile
Differential Revision: https://reviews.llvm.org/D72067

[lldb/tools] Update lldb-test's system initializer
After a731c6ba94d0 the initializer only has to call the PlatformMacOSX 
to initialize all the macOS platforms.

[Codegen] Emit both AssumeAlignedAttr and AllocAlignAttr assumptions if
they exist
Summary: We shouldn't be just giving up if we find one of them
(like we currently do with `AssumeAlignedAttr`), we should emit them
all.
As the tests show, even if we materialized good knowledge from
`__attribute__((assume_aligned(32)`, it doesn't mean
`__attribute__((alloc_align([...])))` info won't be useful. It might be,
but that isn't given.
Reviewers: erichkeane, jdoerfert, aaron.ballman
Reviewed By: erichkeane
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D72979

[NFC][Codegen] Use MaybeAlign + APInt::getLimitedValue() when creating
Alignment attr
Summary: Just an NFC code cleanup i stumbled upon when stumbling through
clang alignment attribute handling.
Reviewers: erichkeane, gchatelet, courbet, jdoerfert
Reviewed By: gchatelet
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D72993

[APFloat] Extend conversion from special strings
Add support for converting Signaling NaN, and a NaN Payload from string.
The NaNs (the string "nan" or "NaN") may be prefixed with 's' or 'S' for
defining a Signaling NaN.
A payload for a NaN can be specified as a suffix. It may be a
octal/decimal/hexadecimal number in parentheses or without.
Differential Revision: https://reviews.llvm.org/D69773

[OpenMP][Offloading] Fix the issue that omp_get_num_devices returns
wrong number of devices, by Shiley Tian.
Summary: This patch is to fix issue in the following simple case:
  #include <omp.h>
 #include <stdio.h>
  int main(int argc, char *argv[]) {
   int num = omp_get_num_devices();
   printf("%d\n", num);
    return 0;
 }
Currently it returns 0 even devices exist. Since this file doesn't
contain any target region, the host entry is empty so further actions
like initialization will not be proceeded, leading to wrong device
number returned by runtime function call.
Reviewers: jdoerfert, ABataev, protze.joachim
Reviewed By: ABataev
Subscribers: protze.joachim
Tags: #openmp
Differential Revision: https://reviews.llvm.org/D72576

[APFloat][unittest] Fix -Wunused-variable after D69773

[Attr][Doc][NFC] Fix code snippet formatting for attribute documentation
Reviewers: aaron.ballman, Fznamznon
Subscribers: ebevhan, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D73104

[debugserver] Delete macOS/PPC debug server implementation
macOS/PPC support was dropped in 10.6 (Snow Leopard).
Differential Revision: https://reviews.llvm.org/D69524

[APFloat] Add support for operations on Signaling NaN
Fix PR30781
Differential Revision: https://reviews.llvm.org/D69774

[debugserver] Delete stale code referencing ppc

[TableGen] Use a table to lookup MVE intrinsic names
Summary: Speeds up compilation of SemaDeclAttr.cpp by nine seconds:
 0m49.555s - > 0m40.249s
Reviewers: simon_tatham, dmgreen, ostannard, MarkMurrayARM
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D72984

[lldb] Add a setting to not install the main executable
Summary: Add setting target.auto-install-main-executable that controls
whether the main executable should be automatically installed when
connected to a remote platform even if it does not have an explicit
install path specified. The default is true as the current behaviour.
Reviewers: omjavaid, JDevlieghere, srhines, labath, clayborg
Reviewed By: clayborg
Subscribers: kevin.brodsky, lldb-commits, llvm-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D71761

[mlir][ods] Fix StringRef initialization in builders
For the generated builder taking in unwrapped attribute values, if the
argument is a string, we should avoid wrapping it in quotes; otherwise
we are always setting the string attribute to contain the string
argument's name. The quotes come from StrinAttr's
`constBuilderCall`, which is reasonable for string literals, but not
function arguments containing strings.
Differential Revision: https://reviews.llvm.org/D72977

[WebAssembly][InstrEmitter] Foundation for multivalue call lowering
Summary: WebAssembly is unique among upstream targets in that it does
not at any point use physical registers to store values. Instead, it
uses virtual registers to model positions in its value stack. This means 
that some target-independent lowering activities that would use physical
registers need to use virtual registers instead for WebAssembly and
similar downstream targets. This CL generalizes the existing
`usesPhysRegsForPEI` lowering hook to
`usesPhysRegsForValues` in preparation for using it in more places.
One such place is in InstrEmitter for instructions that have variadic 
defs. On register machines, it only makes sense for these defs to be 
physical registers, but for WebAssembly they must be virtual registers 
like any other values. This CL changes InstrEmitter to check the new 
target lowering hook to determine whether variadic defs should be 
physical or virtual registers.
These changes are necessary to support a generalized CALL instruction 
for WebAssembly that is capable of returning an arbitrary number of 
arguments. Fully implementing that instruction will require additional 
changes that are described in comments here but left for a follow up 
commit.
Reviewers: aheejin, dschuff, qcolombet
Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D71484

[scudo][standalone] Allow sched_getaffinity to fail
Summary: In some configuration, `sched_getaffinity` can fail. Some
reasons for that being the lack of `CAP_SYS_NICE` capability or some
syscall filtering and so on.
This should not be fatal to the allocator, so in this situation, we will
fallback to the `MaxTSDCount` value specified in the allocator 
configuration.
Reviewers: cferris, eugenis, hctim, morehouse, pcc
Subscribers: #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D73055

[Hexagon] Add REQUIRES: asserts to a testcase using -debug-only

Revert "[lldb] Add a setting to not install the main executable"
The commit has been reverted as it does not mention the author of the 
patch.
This reverts commit 7c9bcba644c4fc2178e20060d9ba2ff1f50ae15e.

[lldb] Add a setting to not install the main executable
Summary: Add setting target.auto-install-main-executable that controls
whether the main executable should be automatically installed when
connected to a remote platform even if it does not have an explicit
install path specified. The default is true as the current behaviour.
Reviewers: omjavaid, JDevlieghere, srhines, labath, clayborg
Reviewed By: clayborg
Subscribers: kevin.brodsky, lldb-commits, llvm-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D71761

[WebAssembly] Split and recombine multivalue calls for ISel
Summary: Multivalue calls both take and return an arbitrary number of 
arguments, but ISel only supports one or the other in a single 
instruction. To get around this, calls are modeled as two pseudo 
instructions during ISel. These pseudo instructions, CALL_PARAMS and 
CALL_RESULTS, are recombined into a single CALL MachineInstr in a custom
emit hook.
RegStackification and the MC layer will additionally need to be made 
aware of multivalue calls before the tests will produce correct output.
Reviewers: aheejin, dschuff
Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D71496

[GISelKnownBits] Make the max depth a parameter of the analysis
Allow users of that analysis to define the cut off depth of the analysis
instead of hardcoding 6.
NFC as the default parameter is 6.