Changes

[X86] Check immediate before get it.

For CMP imm instruction, when the operand 1 is symbol address we should
check if it is immediate first. Here is the example code.
`CMP64mi32 $noreg, 8, killed renamable $rcx, @d, $noreg, @a, implicit-def
$eflags`
Many thanks to Craig, Topper for the test case to reproduce this issue.

Differential Revision: https://reviews.llvm.org/D104037

[ARM][NEON] Combine base address updates for vld1Ndup intrinsics

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D103836

[clang] Implement P2266 Simpler implicit move

This Implements [[http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2266r1.html|P2266 Simpler implicit move]].

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Reviewed By: Quuxplusone

Differential Revision: https://reviews.llvm.org/D99005

[ORC-RT] Fix a comment.

[JITLink][MachO] Add missing testcase.

This test was accidentally left out of f9649d123db.

[ORC-RT] Remove unused header in unit test.

VPlanSLP.cpp - tidy implicit header dependencies. NFCI.

We don't use std::string and std::vector, but we do use std::pair and std::max.

ArgumentPromotion.cpp - remove unused <string> include. NFCI.

SValExplainer.h - get APSInt values by const reference instead of value. NFCI.

Avoid unnecessary copies.

[InstCombine] fold ctlz/cttz of bool types

https://alive2.llvm.org/ce/z/tX4pUT

[clang][NFC] Add IsAnyDestructorNoReturn field to CXXRecord instead of calculating it on demand

This patch addresses a performance issue I noticed when using clang-12 to compile projects of mine. Even though the files weren't too large (around 1k cpp), the compiler was taking more than a minute to compile the source file, much longer than either GCC or MSVC.

Using a profiler it turned out the issue was the isAnyDestructorNoReturn function in CXXRecordDecl. In particular it being recursive, recalculating the property for every invocation, for every field and base class. This showed up in tracebacks in the profiler.

This patch instead adds IsAnyDestructorNoReturn as a Field to the data inside of CXXRecord and updates when a new base class, destructor, or record field member is added.

After this patch the problematic file of mine went from a compile time of 81s, down to 12s.

The patch itself should not change any functionality, just improve performance.

Differential Revision: https://reviews.llvm.org/D104182

[ARM] Introduce t2WhileLoopStartTP

This adds t2WhileLoopStartTP, similar to the t2DoLoopStartTP added in
D90591. It keeps a reference to both the tripcount register and the
element count register, so that the ARMLowOverheadLoops pass in the
backend can pick the correct one without having to search for it from
the operand of a VCTP.

Differential Revision: https://reviews.llvm.org/D103236

LoopUnrollAndJamPass.cpp - remove unused <vector> include. NFCI.

GVN.cpp - remove unused <vector> include. NFCI.