Create phi recipes for scalar resume value up front in addInitialSkeleton during initial construction. This will allow moving the remaining code dealing with resume values to VPlan transforms/construction.

PR: https://github.com/llvm/llvm-project/pull/166099

Remove `VPWidenPointerInductionRecipe::IsScalarAfterVectorization` and
replace it with `onlyScalarValuesUsed`. This removes the need to carry
state from the legacy cost model through VPlan, and the VPlan-based
analysis gives more accurate results, avoiding a number of extracts.

PR: https://github.com/llvm/llvm-project/pull/168289

Implement VPHeaderPHIRecipe::classof(const VPValue *V)  in terms of the
variant taking VPRecipeBase.

Reduces some duplication, split off from
https://github.com/llvm/llvm-project/pull/141431.

FCmp instructions have both a predicate and fast-math flags. Introduce a
new FCmp kind, that combines both to model this correctly in the current
system.

This should be NFC modulo VPlan printing which now includes the correct
fast-math flags.

Update VPlan to populate VPIRFlags during VPInstruction construction and
use it when creating widened recipes, instead of constructing VPIRFlags
from the underlying IR instruction each time. The VPRecipeWithIRFlags
constructor taking an underlying instruction and setting the flags based
on it has been removed.

This centralizes initial VPIRFlags creation and ensures flags are
consistently available throughout VPlan transformations and makes sure
we don't accidentally re-add flags from the underlying instruction that
already got dropped during transformations.

Follow-up to https://github.com/llvm/llvm-project/pull/167253, which did
the same for VPIRMetadata.

Should be NFC w.r.t. to the generated IR.

PR: https://github.com/llvm/llvm-project/pull/168450

Implement CastInfo from VPRecipeBase to VPIRMetadata to support
isa/dyn_Cast. This is similar to CastInfoVPPhiAccessors, supporting
dyn_cast by down-casting to the concrete recipe types inheriting from
VPIRMetadata.

Can be used for more generalized VPIRMetadata printing following
https://github.com/llvm/llvm-project/pull/165825.

PR: https://github.com/llvm/llvm-project/pull/166245

This patch implements a transform to hoists single-scalar replicated
loads with invariant addresses out of the vector loop to the preheader
when scoped noalias metadata proves they cannot alias with any stores in
the loop.

This enables hosting of loads we can prove do not alias any stores in
the loop due to memory runtime checks added during vectorization.

PR: https://github.com/llvm/llvm-project/pull/166247

Update VPlan to populate VPIRMetadata during VPInstruction construction
and use it when creating widened recipes, instead of constructing
VPIRMetadata from the underlying IR instruction each time.

This centralizes VPIRMetadata in VPInstructions and ensures metadata is
consistently available throughout VPlan transformations.

PR: https://github.com/llvm/llvm-project/pull/167253

Replace addMetadata with setMetadata, which sets metadata, updating
existing entries or adding a new entry otherwise.

This isn't strictly needed at the moment, but will be needed for
follow-up patches.

Changes: The previous patch had to be reverted to a mismatching-OpType
assert in cse. The reduced-test has now been added corresponding to a
RVV pointer-induction, and the pointer-induction case has been updated
to use createOverflowingBinaryOp.

While at it, record VPIRFlags in VPWidenInductionRecipe.