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David Sherwood b1a389ab23 [SVE] Add support for scalable vectorization of loops with selects and cmps

I have removed an unnecessary assert in LoopVectorizationCostModel::getInstructionCost
that prevented a cost being calculated for select instructions when using
scalable vectors. In addition, I have changed AArch64TTIImpl::getCmpSelInstrCost
to only do special cost calculations for fixed width vectors and fall
back to the base version for scalable vectors.

I have added a simple cost model test for cmps and selects:

  test/Analysis/CostModel/sve-cmpsel.ll

and some simple tests that show we vectorize loops with cmp and select:

  test/Transforms/LoopVectorize/AArch64/sve-basic-vec.ll

Differential Revision: https://reviews.llvm.org/D95039

2021-01-22 09:48:13 +00:00

AArch64

[AArch64][SVE]Add cost model for vector reduce for scalable vector

2021-01-19 11:54:16 +00:00

AMDGPU

[AMDGPU][CostModel] Refine cost model for half- and quarter-rate instructions.

2020-10-24 19:53:08 +03:00

ARM

[ARM] Expand vXi1 VSELECT's

2021-01-19 17:56:50 +00:00

PowerPC

Precommit analysis/etc tests for inselt poison placeholder