Add a new `CreateIntrinsic` overload with no `Types`, useful for
creating calls to non-overloaded intrinsics that don't need additional
mangling.

Identified with misc-include-cleaner.

Just insert addrspacecast in cases where the alloca uses a
different address space, since I don't know what else you
could possibly do.

This pull request corrects multiple occurrences of the typo "avaliable"
to "available" across the LLVM and Clang codebase. These changes improve
the clarity and accuracy of comments and documentation. Specific
modifications are in the following files:

1. clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp:
Updated comments in readability checks for cognitive complexity.
2. llvm/include/llvm/ExecutionEngine/Orc/ExecutionUtils.h: Corrected
documentation for JITDylib responsibilities.
3. llvm/include/llvm/Target/TargetMacroFusion.td: Fixed descriptions for
FusionPredicate variables.
4. llvm/lib/CodeGen/SafeStack.cpp: Improved comments on DominatorTree
availability.
5. llvm/lib/Target/RISCV/RISCVSchedSiFive7.td: Enhanced resource usage
descriptions for vector units.
6. llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp: Updated invariant
description in shift-detect idiom logic.
7. llvm/test/MC/ARM/mve-fp-registers.s: Amended ARM MVE register
availability notes.
8. mlir/lib/Bytecode/Reader/BytecodeReader.cpp: Adjusted forward
reference descriptions for bytecode reader operations.

These changes have no impact on code functionality, focusing solely on
documentation clarity.

Co-authored-by: wangqiang <wangqiang1@kylinos.cn>

Convert almost every instance of:
  CreateCall(Intrinsic::getOrInsertDeclaration(...), ...)
to the equivalent CreateIntrinsic call.

Rename the function to reflect its correct behavior and to be consistent
with `Module::getOrInsertFunction`. This is also in preparation of
adding a new `Intrinsic::getDeclaration` that will have behavior similar
to `Module::getFunction` (i.e, just lookup, no creation).

Similar to https://github.com/llvm/llvm-project/pull/96902, this adds
`getDataLayout()` helpers to Function and GlobalValue, replacing the
current `getParent()->getDataLayout()` pattern.

Reverts the above commit, as it updates a common header function and
did not update all callsites:

  https://lab.llvm.org/buildbot/#/builders/29/builds/382

This reverts commit 6481dc57612671ebe77fe9c34214fba94e1b3b27.

Uses the new InsertPosition class (added in #94226) to simplify some of
the IRBuilder interface, and removes the need to pass a BasicBlock
alongside a BasicBlock::iterator, using the fact that we can now get the
parent basic block from the iterator even if it points to the sentinel.
This patch removes the BasicBlock argument from each constructor or call
to setInsertPoint.

This has no functional effect, but later on as we look to remove the
`Instruction *InsertBefore` argument from instruction-creation
(discussed
[here](https://discourse.llvm.org/t/psa-instruction-constructors-changing-to-iterator-only-insertion/77845)),
this will simplify the process by allowing us to deprecate the
InsertPosition constructor directly and catch all the cases where we use
instructions rather than iterators.

This abstracts over the common pattern of creating a gep with i8 element
type.