Created using spr 1.3.6-beta.1

[skip ci]

We're going to end up repeating the operand extraction four times once
all of the routines have been updated to support both plain load/store
and vp.load/vp.store. I plan to add masked.load/masked.store in the near
future, and we'd need to add that to each of the four cases. Instead,
factor out a single copy of the operand normalization.

For context see main pull request: #147424.

Reviewers: MaskRay

Reviewed By: MaskRay

Pull Request: https://github.com/llvm/llvm-project/pull/149259

LLVM Coding Standards discourages llvm::for_each unless we already
have a callable.

This happens only when you use larger tile size, which is greater than
or equal to the dimension size. In this case, it is a full slice, so it
is fusible.

The IR can be generated during the TileAndFuse process. It is hard to
fix in such driver, so we enable the naive fusion for the case.

---------

Signed-off-by: hanhanW <hanhan0912@gmail.com>

This aims to expand the the MemRefToEmitC pass so that it can accept
global scalars.
From:
```
memref.global "private" constant @__constant_xi32 : memref<i32> = dense<-1>
func.func @globals() {
    memref.get_global @__constant_xi32 : memref<i32>
}
```
To:
```
emitc.global static const @__constant_xi32 : i32 = -1
    emitc.func @globals() {
      %0 = get_global @__constant_xi32 : !emitc.lvalue<i32>
      %1 = apply "&"(%0) : (!emitc.lvalue<i32>) -> !emitc.ptr<i32>
      return
    }
```

Co-authored-by: Mekhanoshin, Stanislav <Stanislav.Mekhanoshin@amd.com>
Co-authored-by: Foad, Jay <Jay.Foad@amd.com>

Co-authored-by: Mekhanoshin, Stanislav <Stanislav.Mekhanoshin@amd.com>