[RISCV] Remove -riscv-v-vector-bits-min from cost model tests. NFC

It looks like they were added to prevent fixed length vectors from
being expanded, but that's no longer the case today:
https://rev

[RISCV] Remove -riscv-v-vector-bits-min from cost model tests. NFC

It looks like they were added to prevent fixed length vectors from
being expanded, but that's no longer the case today:
https://reviews.llvm.org/D121447#3376520

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[RISCV][CostModel] Refine Arithmetic reduction costs (#79103)

This patch is split off from #77342

- Correct for CodeSize cost that 1 instruction is not included. 3 is
from {VMV.S, ReductionOp, V

[RISCV][CostModel] Refine Arithmetic reduction costs (#79103)

This patch is split off from #77342

- Correct for CodeSize cost that 1 instruction is not included. 3 is
from {VMV.S, ReductionOp, VMV.X}
- Add SplitCost
Unordered reduction chain a series of VADD/VFADD/... which scales with
LMUL.
Ordered reductions chain a series of VFREDOSUMs.
- Use MVT to estimate VL.

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[RISCV][CostModel] Add getCFInstrCost RISC-V implementation (#65599)

This patch implements getCFInstrCost TTI hook that mostly affects
LoopVectorizer decisions. It sets zero cost for PHI nodes and

[RISCV][CostModel] Add getCFInstrCost RISC-V implementation (#65599)

This patch implements getCFInstrCost TTI hook that mostly affects
LoopVectorizer decisions. It sets zero cost for PHI nodes and zero
throughput cost for branches (assuming that branches are likely to
be predicted). The implementation is similar to X86/AArch64/PowerPC
targets and reduces loop cost by excluding induction PHIs/loop latch
branches, which in turn leads to selecting smaller vectorization
factor.

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[CostModel][RISCV] Model code size cost for reduction

Since code-size cost doesn't scale linearly with LMUL,
this change is to separate it from throughput.

Reviewed By: reames

Differential Revisio

[CostModel][RISCV] Model code size cost for reduction

Since code-size cost doesn't scale linearly with LMUL,
this change is to separate it from throughput.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D142068

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[CostModel] Update RUN -passes=* to double quotes to appease update scripts on windows

DOS really doesn't like `` quotes to be used in command lines

Some prep work as I'm intending to resurrect D79

[CostModel] Update RUN -passes=* to double quotes to appease update scripts on windows

DOS really doesn't like `` quotes to be used in command lines

Some prep work as I'm intending to resurrect D79483 soon

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[RISCV] Refine costs for i1 reductions

Our actual lowering for i1 reductions uses ctpop combined with possibly a vector negate and possibly a logic op afterwards. I believe ctpop to be low cost on a

[RISCV] Refine costs for i1 reductions

Our actual lowering for i1 reductions uses ctpop combined with possibly a vector negate and possibly a logic op afterwards. I believe ctpop to be low cost on all reasonable hardware.

The default costing implementation here was returning quite inconsistent costs. and/or were returning very high costs (because we seem to think moving into scalar registers is very expensive?) and others were returning lower but still too high (because of the assumed tree reduce strategy). While we should probably improve the generic costing strategy for i1 vectors, let's start by fixing the immediate problem.

Differential Revision: https://reviews.llvm.org/D127511

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[RISCV] Use common prefixes to reduce duplication in cost model tests

[RISCV] Broaden cost model coverage for fixed vectors w/i1 element type

[RISCV] Add basic code modeling for fixed length vector reduction.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D121447