Changes

[LegalizeIntegerTypes] Use GetExpandedInteger instead of SplitInteger in ExpandIntRes_XMULO.

We know the input is going to be expanded as well, so we should
just ask for the already expanded operands. Otherwise we create
nodes that are just going to need to be legalized.

Add REQUIRES aarch64 to test incompatible-arch.s since it fails if that target is not built.

This should fix the PS4 linux buildbot failure: http://lab.llvm.org:8011/#/builders/139/builds/63

[libc++] [docs] [C++2b] Update status page with papers adopted in February 2021 virtual meeting.

Revert "[InstrProfiling] Use nobits as __llvm_prf_cnts section type in ELF"

This reverts commit 6b286d93f7ec8518c685a302269e44b06a0a24f3 because
in some cases when the optimizer evaluates the global initializer,
__llvm_prf_cnts may not be entirely zero initialized.

[ARM] Expand the range of allowed post-incs in load/store optimizer

Currently the load/store optimizer will only fold in increments of the
same size as the load/store. This patch expands that to any legal
immediate for the post-inc instruction.

This is a recommit of 3b34b06fc5908b with correctness fixes and extra
tests.

Differential Revision: https://reviews.llvm.org/D95885

[LLD] [COFF] Allow invoking lib.exe mode via -lib in addition to /lib

Remove a stray -lib argument in guardcf-lto.ll; llvm-lib doesn't
support generating import libs from a def file unlike lib.exe.
Previously this worked because the -lib argument was ignored
(printing only a warning).

Differential Revision: https://reviews.llvm.org/D96699

[libcxx] [test] Don't pass INCLUDE to clang via -isystem

Passing the MSVC include dirs via -isystem makes them included before
clang's own include resource dir (<prefix>/lib/clang/<version>/include).
This causes includes of stddef.h to bypass clang's stddef.h which
defines max_align_t, which libc++ needs defined.

This was added in 4372f06d0fcaba1a6913e2f37be064e06a7b5b5b when the
initial windows testing support was added, and has been brought along
since. It's unclear if this was needed back then - now it no longer is
needed at least, and since libc++ started depending on max_align_t, this
became an issue.

Differential Revision: https://reviews.llvm.org/D97167

[OpenCL] Add declarations with enum/typedef args

Add the remaining missing builtin function declarations that have enum
or typedef argument or return types.

Differential Revision: https://reviews.llvm.org/D96860

[OpenCL] Add ndrange builtin functions to TableGen

Also ensure all kernel enqueue functions have CL 2.0 as minimum
version.

Differential Revision: https://reviews.llvm.org/D97060

[AArch64] Use CMTST for != 0 vector compares (vnot (CMEQz A)).

(CMTST A, A) will only set elements to 0 if the element is 0 in A. Use
it for != 0 compares, which currently use (vnot (CMEQz A)). This saves a
mvn instruction.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D97303