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[AArch64][LoopVectorize] Enable tail-folding on neoverse-v2 #135357

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[AArch64][LoopVectorize] Enable tail-folding on neoverse-v2 #135357

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2 changes: 2 additions & 0 deletions llvm/lib/Target/AArch64/AArch64Subtarget.cpp
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Expand Up @@ -268,6 +268,8 @@ void AArch64Subtarget::initializeProperties(bool HasMinSize) {
MaxBytesForLoopAlignment = 16;
break;
case NeoverseV2:
DefaultSVETFOpts = TailFoldingOpts::Simple;
LLVM_FALLTHROUGH;
case NeoverseV3:
EpilogueVectorizationMinVF = 8;
MaxInterleaveFactor = 4;
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2 changes: 2 additions & 0 deletions llvm/test/Transforms/LoopVectorize/AArch64/sve-tail-folding-option.ll
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Expand Up @@ -11,6 +11,8 @@
; RUN: opt < %s -passes=loop-vectorize -sve-tail-folding-insn-threshold=0 -S -sve-tail-folding=default -mcpu=neoverse-v1 | FileCheck %s -check-prefix=CHECK-NEOVERSE-V1
; RUN: opt < %s -passes=loop-vectorize -sve-tail-folding-insn-threshold=0 -S -mcpu=neoverse-v1 -sve-tail-folding=default | FileCheck %s -check-prefix=CHECK-NEOVERSE-V1
; RUN: opt < %s -passes=loop-vectorize -sve-tail-folding-insn-threshold=0 -S -mcpu=neoverse-v1 | FileCheck %s -check-prefix=CHECK-NEOVERSE-V1
; Simple tail-folding is also enabled by default on neoverse-v2. Use same check prefix.
; RUN: opt < %s -passes=loop-vectorize -sve-tail-folding-insn-threshold=0 -S -mcpu=neoverse-v2 | FileCheck %s -check-prefix=CHECK-NEOVERSE-V1

target triple = "aarch64-unknown-linux-gnu"

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