Changes

[lldb] improve the help strings for gdb-remote and kdp-remote

The help string can be more helpful by explaining these are
aliases for 'process connect'

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D111965

[cuda] Add address space predicate funuctions.

- Add the missing NVVM predicate builtins on address space checking
- Redefine them as pure functions so that they could be used in
  __builtin_assume.

Reviewed By: tra

Differential Revision: https://reviews.llvm.org/D112053

[lldb/test] Update test/API/functionalities/load_lazy to macOS 12

In macOS 12, dyld switched to using chained fixups. As a result, all symbols
are bound at launch and there are no lazy pointers any more. Since we wish to
import/dlopen() a dylib with missing symbols, we need to use a weak import.
This applies to all macOS 12-aligned OS releases, e.g. iOS 15, etc.

rdar://81295101

Differential Revision: https://reviews.llvm.org/D112034

[driver] Explicitly specify `-fbuild-session-timestamp` in seconds.

Representation of the file's last modification time depends on the file
system and isn't guaranteed to be in seconds. Cast to seconds explicitly
and tighten the test case to check the magnitude of the calculated
value, so we can catch passing milliseconds or nanoseconds.

rdar://83915615

Differential Revision: https://reviews.llvm.org/D111205

[fir] Add character utility functions in FIRBuilder

Extract part of D111337 in order to mke it smaller
and easier to review. This patch add some utility
functions to the FIRBuilder.

Add the following utility functions:
- getCharacterLengthType
- createStringLiteral
- locationToFilename
- characterWithDynamicLen
- sequenceWithNonConstantShape
- hasDynamicSize

These bring up the BoxValue implementation together with it.

This patch is part of the upstreaming effort from fir-dev branch.

Reviewed By: AlexisPerry

Differential Revision: https://reviews.llvm.org/D112074

Co-authored-by: Jean Perier <jperier@nvidia.com>
Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>

[x86] add tests for psubus; NFC

[clang][Driver] Make multiarch output file basenames reproducible

When building a multiarch MachO binary, previously the intermediate
output file names would contain random characters. On macOS this
filename, since it's used when linking, ended up being used as a
stable-ish identifier for the adhoc codesignature of the binary, leading
to non-reproducible binaries. This change uses the architecture, when
available, to create a stable, but unique, basename for the file.

Differential Revision: https://reviews.llvm.org/D111269

[x86] add special-case lowering for usubsat for pre-SSE4

usubsat X, SMIN --> (X ^ SMIN) & (X s>> BW-1)

This would be a regression with D112085 where we combine to
usubsat more aggressively, so avoid that by matching the
special-case where we are subtracting SMIN (signmask):
https://alive2.llvm.org/ce/z/4_3gBD

Differential Revision: https://reviews.llvm.org/D112095

[Driver][Gnu] Delete unneeded -Bstatic dispatch for arm/thumb

Historically -static and -Bstatic are synonym.
gold made the semantics of -static slightly stronger but that does not matter.

[llvm-reduce] Add reduction passes to reduce operands to undef/1/0

Having non-undef constants in a final llvm-reduce output is nicer than
having undefs.

This splits the existing reduce-operands pass into three, one which does
the same as the current pass of reducing to undef, and two more to
reduce to the constant 1 and the constant 0. Do not reduce to undef if
the operand is a ConstantData, and do not reduce 0s to 1s.

Reducing GEP operands very frequently causes invalid IR (since types may
not match up if we index differently into a struct), so don't touch GEPs.

Reviewed By: Meinersbur

Differential Revision: https://reviews.llvm.org/D111765

[WebAssembly] Emit clangast in custom section aligned by 4 bytes

Emit __clangast in custom section instead of named data segment
to find it while iterating sections.
This could be avoided if all data segements (the wasm sense) were
represented as their own sections (in the llvm sense).
This can be resolved by https://github.com/WebAssembly/tool-conventions/issues/138

And the on-disk hashtable in clangast needs to be aligned by 4 bytes,
so add paddings in name length field in custom section header.

The length of clangast section name can be represented in 1 byte
by leb128, and possible maximum pads are 3 bytes, so the section
name length won't be invalid in theory.

Fixes https://bugs.llvm.org/show_bug.cgi?id=35928

Differential Revision: https://reviews.llvm.org/D74531