Changes

[X86] Remove unnecessary SUBV_BROADCAST combines. NFCI.

Noticed while dealing with D92645 - these are now handled by getFauxShuffleMask + shuffle combining code.

[PGO] Allow overriding -vp-counters-per-site

In some build configurations more than 1.5 might be required.
Paramaterize so it can be changed by the user.

Reviewed By: yamauchi

Differential Revision: https://reviews.llvm.org/D93281

[AArch64][NEON] Remove undocumented vceqz{,q}_p16, vml{a,s}q_n_f64 intrinsics

Prior to this patch, Clang supported the following C/C++ intrinsics:

    vceqz_p16
    vceqzq_p16
    vmlaq_n_f64
    vmlsq_n_f64

... exposed through arm_neon.h. However, these intrinsics are not part
of the ACLE, allowing developers to write code that is not compatible
with other toolchains.

This patch removes these intrinsics.

There is a bug report capturing this issue here:

    https://bugs.llvm.org/show_bug.cgi?id=47471

Reviewed By: bsmith

Differential Revision: https://reviews.llvm.org/D93206

[ELF] Error for out-of-range R_X86_64_[REX_]GOTPCRELX

Reviewed By: grimar

Differential Revision: https://reviews.llvm.org/D93259

[llvm-symbolizer] Add missing include for config.h

The cmake variable LLVM_ENABLE_DIA_SDK was being used here but
was undefined because config.h wasn't included.

Differential Revision: https://reviews.llvm.org/D93309

SeparateConstOffsetFromGEP::lowerToSingleIndexGEPs - don't use dyn_cast_or_null. NFCI.

ResultPtr is guaranteed to be non-null - and using dyn_cast_or_null causes unnecessary static analyzer warnings.

We can't say the same for FirstResult AFAICT, so keep dyn_cast_or_null for that.

[X86] Explicitly use SDValue instead of auto. NFCI.

Fix static analyzer warning about not using a SDValue&