Changes

[SVE][NFC] Regenerate a few CodeGen tests

Regenerated using llvm/utils/update_llc_test_checks.py as part of
D94504, committing separately to reduce the diff for D94504.

Add -ansi option to CompileOnly group

-ansi is documented as being the "same as -std=c89", but there are
differences when passing it to a link.

Adding -ansi to said group makes sense since it's supposed to be an
alias for -std=c89 and resolves this inconsistency.

[doc] Place sha256 in lld/README.md into backticks

Reviewed By: smeenai

Differential Revision: https://reviews.llvm.org/D93984

Return false from __has_declspec_attribute() if not explicitly enabled

Currently, projects can check for __has_declspec_attribute() and use
it accordingly, but the check for __has_declspec_attribute will return
true even if declspec attributes are not enabled for the target.

This changes Clang to instead return false when declspec attributes are
not supported for the target.

[llvm] [cmake] Remove obsolete /usr/local hack for *BSD

Remove the hack adding /usr/local paths on FreeBSD and DragonFlyBSD.
It does not seem to be necessary today, and it breaks cross builds.

Differential Revision: https://reviews.llvm.org/D94491

[Tests] Add tests for new InstCombine OR transformation, NFC

[instCombine] Add (A ^ B) | ~(A | B) -> ~(A & B)

define i32 @src(i32 %x, i32 %y) {
%0:
  %xor = xor i32 %y, %x
  %or = or i32 %y, %x
  %neg = xor i32 %or, 4294967295
  %or1 = or i32 %xor, %neg
  ret i32 %or1
}
=>
define i32 @tgt(i32 %x, i32 %y) {
%0:
  %and = and i32 %x, %y
  %neg = xor i32 %and, 4294967295
  ret i32 %neg
}
Transformation seems to be correct!

https://alive2.llvm.org/ce/z/Cvca4a

[Flang][openmp][openacc] Extend CheckNoBranching to handle branching provided by LabelEnforce.

`CheckNoBranching` is currently handling only illegal branching out for constructs
with `Parser::Name` in them.
Extend the same for handling illegal branching out caused by `Parser::Label` based statements.
This patch could possibly solve one of the issues(typically branching out) mentioned in D92735.

Reviewed By: kiranchandramohan

Differential Revision: https://reviews.llvm.org/D93447