[llvm] [LoopVectorizer] Allow partial reductions to be made in predicated loops (PR #124268)
James Chesterman via llvm-commits
llvm-commits at lists.llvm.org
Fri Jan 24 05:17:10 PST 2025
https://github.com/JamesChesterman created https://github.com/llvm/llvm-project/pull/124268
Does a select on the input rather than the output. This way the mask has the same number of lanes as the other operand in the select instruction.
>From e132b9a12478a6766fa6b5e7cb5e70a0351698ee Mon Sep 17 00:00:00 2001
From: James Chesterman <james.chesterman at arm.com>
Date: Fri, 24 Jan 2025 13:12:09 +0000
Subject: [PATCH] [LoopVectorizer] Allow partial reductions to be made in
predicated loops
Does a select on the input rather than the output. This way the
mask has the same number of lanes as the other operand in the
select instruction.
---
.../Transforms/Vectorize/LoopVectorize.cpp | 16 ++++------
llvm/lib/Transforms/Vectorize/VPlan.h | 20 +++++++++---
.../lib/Transforms/Vectorize/VPlanRecipes.cpp | 6 ++++
.../partial-reduce-dot-product-neon.ll | 24 +++++++-------
.../AArch64/partial-reduce-dot-product.ll | 32 +++++++++----------
5 files changed, 56 insertions(+), 42 deletions(-)
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 99f6a8860f0f4d..e67950e83d3f81 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -8827,13 +8827,6 @@ std::optional<std::pair<PartialReductionChain, unsigned>>
VPRecipeBuilder::getScaledReduction(PHINode *PHI,
const RecurrenceDescriptor &Rdx,
VFRange &Range) {
- // TODO: Allow scaling reductions when predicating. The select at
- // the end of the loop chooses between the phi value and most recent
- // reduction result, both of which have different VFs to the active lane
- // mask when scaling.
- if (CM.blockNeedsPredicationForAnyReason(Rdx.getLoopExitInstr()->getParent()))
- return std::nullopt;
-
auto *Update = dyn_cast<BinaryOperator>(Rdx.getLoopExitInstr());
if (!Update)
return std::nullopt;
@@ -8982,7 +8975,9 @@ VPRecipeBuilder::tryToCreatePartialReduction(Instruction *Reduction,
if (isa<VPReductionPHIRecipe>(BinOp->getDefiningRecipe()))
std::swap(BinOp, Phi);
- return new VPPartialReductionRecipe(Reduction->getOpcode(), BinOp, Phi,
+ VPValue *Mask = getBlockInMask(Reduction->getParent());
+
+ return new VPPartialReductionRecipe(Reduction->getOpcode(), BinOp, Phi, Mask,
Reduction);
}
@@ -9876,8 +9871,9 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
PhiTy->isFloatingPointTy()
? std::make_optional(RdxDesc.getFastMathFlags())
: std::nullopt;
- NewExitingVPV =
- Builder.createSelect(Cond, OrigExitingVPV, PhiR, {}, "", FMFs);
+ if (!isa<VPPartialReductionRecipe>(OrigExitingVPV->getDefiningRecipe()))
+ NewExitingVPV =
+ Builder.createSelect(Cond, OrigExitingVPV, PhiR, {}, "", FMFs);
OrigExitingVPV->replaceUsesWithIf(NewExitingVPV, [](VPUser &U, unsigned) {
return isa<VPInstruction>(&U) &&
cast<VPInstruction>(&U)->getOpcode() ==
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 87f87bf1437196..c11ac26d6de4b9 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -2439,27 +2439,39 @@ class VPReductionPHIRecipe : public VPHeaderPHIRecipe,
/// A recipe for forming partial reductions. In the loop, an accumulator and
/// vector operand are added together and passed to the next iteration as the
/// next accumulator. After the loop body, the accumulator is reduced to a
-/// scalar value.
+/// scalar value. If the mask operand is not nullptr then it is applied to the
+/// vector operand on each iteration.
class VPPartialReductionRecipe : public VPSingleDefRecipe {
unsigned Opcode;
public:
VPPartialReductionRecipe(Instruction *ReductionInst, VPValue *Op0,
- VPValue *Op1)
- : VPPartialReductionRecipe(ReductionInst->getOpcode(), Op0, Op1,
+ VPValue *Op1, VPValue *Mask = nullptr)
+ : VPPartialReductionRecipe(ReductionInst->getOpcode(), Op0, Op1, Mask,
ReductionInst) {}
VPPartialReductionRecipe(unsigned Opcode, VPValue *Op0, VPValue *Op1,
+ VPValue *Mask = nullptr,
Instruction *ReductionInst = nullptr)
: VPSingleDefRecipe(VPDef::VPPartialReductionSC,
ArrayRef<VPValue *>({Op0, Op1}), ReductionInst),
Opcode(Opcode) {
assert(isa<VPReductionPHIRecipe>(getOperand(1)->getDefiningRecipe()) &&
"Unexpected operand order for partial reduction recipe");
+ if (Mask)
+ addOperand(Mask);
}
~VPPartialReductionRecipe() override = default;
VPPartialReductionRecipe *clone() override {
- return new VPPartialReductionRecipe(Opcode, getOperand(0), getOperand(1));
+ return getNumOperands() == 3
+ ? new VPPartialReductionRecipe(Opcode, getOperand(0),
+ getOperand(1), getOperand(2))
+ : new VPPartialReductionRecipe(Opcode, getOperand(0),
+ getOperand(1));
+ }
+
+ VPValue *getMask() const {
+ return getNumOperands() == 3 ? getOperand(2) : nullptr;
}
VP_CLASSOF_IMPL(VPDef::VPPartialReductionSC)
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index 979a8e0768a991..9e81144c04ac86 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -326,6 +326,12 @@ void VPPartialReductionRecipe::execute(VPTransformState &State) {
Type *RetTy = PhiVal->getType();
+ VPValue *Mask = getMask();
+ if (Mask) {
+ Value *MaskVal = State.get(Mask);
+ Value *Zero = ConstantInt::get(BinOpVal->getType(), 0);
+ BinOpVal = Builder.CreateSelect(MaskVal, BinOpVal, Zero);
+ }
CallInst *V = Builder.CreateIntrinsic(
RetTy, Intrinsic::experimental_vector_partial_reduce_add,
{PhiVal, BinOpVal}, nullptr, "partial.reduce");
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll b/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll
index 97a5801d88108a..cc9f00374e2c89 100644
--- a/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll
@@ -1596,7 +1596,7 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-INTERLEAVE1: vector.body:
; CHECK-INTERLEAVE1-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_LOAD_CONTINUE62:%.*]] ]
; CHECK-INTERLEAVE1-NEXT: [[VEC_IND:%.*]] = phi <16 x i64> [ <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_LOAD_CONTINUE62]] ]
-; CHECK-INTERLEAVE1-NEXT: [[VEC_PHI:%.*]] = phi <16 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP180:%.*]], [[PRED_LOAD_CONTINUE62]] ]
+; CHECK-INTERLEAVE1-NEXT: [[VEC_PHI:%.*]] = phi <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[PARTIAL_REDUCE:%.*]], [[PRED_LOAD_CONTINUE62]] ]
; CHECK-INTERLEAVE1-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-INTERLEAVE1-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-INTERLEAVE1-NEXT: [[TMP2:%.*]] = add i64 [[INDEX]], 2
@@ -1905,14 +1905,14 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-INTERLEAVE1-NEXT: [[TMP177:%.*]] = phi <16 x i8> [ [[TMP172]], [[PRED_LOAD_CONTINUE60]] ], [ [[TMP176]], [[PRED_LOAD_IF61]] ]
; CHECK-INTERLEAVE1-NEXT: [[TMP178:%.*]] = sext <16 x i8> [[TMP177]] to <16 x i32>
; CHECK-INTERLEAVE1-NEXT: [[TMP179:%.*]] = mul nsw <16 x i32> [[TMP178]], [[TMP97]]
-; CHECK-INTERLEAVE1-NEXT: [[TMP180]] = add <16 x i32> [[TMP179]], [[VEC_PHI]]
-; CHECK-INTERLEAVE1-NEXT: [[TMP181:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP180]], <16 x i32> [[VEC_PHI]]
+; CHECK-INTERLEAVE1-NEXT: [[TMP180:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP179]], <16 x i32> zeroinitializer
+; CHECK-INTERLEAVE1-NEXT: [[PARTIAL_REDUCE]] = call <4 x i32> @llvm.experimental.vector.partial.reduce.add.v4i32.v16i32(<4 x i32> [[VEC_PHI]], <16 x i32> [[TMP180]])
; CHECK-INTERLEAVE1-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 16
; CHECK-INTERLEAVE1-NEXT: [[VEC_IND_NEXT]] = add <16 x i64> [[VEC_IND]], splat (i64 16)
; CHECK-INTERLEAVE1-NEXT: [[TMP182:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-INTERLEAVE1-NEXT: br i1 [[TMP182]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK-INTERLEAVE1: middle.block:
-; CHECK-INTERLEAVE1-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v16i32(<16 x i32> [[TMP181]])
+; CHECK-INTERLEAVE1-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[PARTIAL_REDUCE]])
; CHECK-INTERLEAVE1-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK-INTERLEAVE1: scalar.ph:
; CHECK-INTERLEAVE1-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
@@ -1951,7 +1951,7 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-INTERLEAVED: vector.body:
; CHECK-INTERLEAVED-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_LOAD_CONTINUE62:%.*]] ]
; CHECK-INTERLEAVED-NEXT: [[VEC_IND:%.*]] = phi <16 x i64> [ <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_LOAD_CONTINUE62]] ]
-; CHECK-INTERLEAVED-NEXT: [[VEC_PHI:%.*]] = phi <16 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP180:%.*]], [[PRED_LOAD_CONTINUE62]] ]
+; CHECK-INTERLEAVED-NEXT: [[VEC_PHI:%.*]] = phi <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[PARTIAL_REDUCE:%.*]], [[PRED_LOAD_CONTINUE62]] ]
; CHECK-INTERLEAVED-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-INTERLEAVED-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-INTERLEAVED-NEXT: [[TMP2:%.*]] = add i64 [[INDEX]], 2
@@ -2260,14 +2260,14 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-INTERLEAVED-NEXT: [[TMP177:%.*]] = phi <16 x i8> [ [[TMP172]], [[PRED_LOAD_CONTINUE60]] ], [ [[TMP176]], [[PRED_LOAD_IF61]] ]
; CHECK-INTERLEAVED-NEXT: [[TMP178:%.*]] = sext <16 x i8> [[TMP177]] to <16 x i32>
; CHECK-INTERLEAVED-NEXT: [[TMP179:%.*]] = mul nsw <16 x i32> [[TMP178]], [[TMP97]]
-; CHECK-INTERLEAVED-NEXT: [[TMP180]] = add <16 x i32> [[TMP179]], [[VEC_PHI]]
-; CHECK-INTERLEAVED-NEXT: [[TMP181:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP180]], <16 x i32> [[VEC_PHI]]
+; CHECK-INTERLEAVED-NEXT: [[TMP180:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP179]], <16 x i32> zeroinitializer
+; CHECK-INTERLEAVED-NEXT: [[PARTIAL_REDUCE]] = call <4 x i32> @llvm.experimental.vector.partial.reduce.add.v4i32.v16i32(<4 x i32> [[VEC_PHI]], <16 x i32> [[TMP180]])
; CHECK-INTERLEAVED-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 16
; CHECK-INTERLEAVED-NEXT: [[VEC_IND_NEXT]] = add <16 x i64> [[VEC_IND]], splat (i64 16)
; CHECK-INTERLEAVED-NEXT: [[TMP182:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-INTERLEAVED-NEXT: br i1 [[TMP182]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK-INTERLEAVED: middle.block:
-; CHECK-INTERLEAVED-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v16i32(<16 x i32> [[TMP181]])
+; CHECK-INTERLEAVED-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[PARTIAL_REDUCE]])
; CHECK-INTERLEAVED-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK-INTERLEAVED: scalar.ph:
; CHECK-INTERLEAVED-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
@@ -2306,7 +2306,7 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-MAXBW: vector.body:
; CHECK-MAXBW-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_LOAD_CONTINUE62:%.*]] ]
; CHECK-MAXBW-NEXT: [[VEC_IND:%.*]] = phi <16 x i64> [ <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_LOAD_CONTINUE62]] ]
-; CHECK-MAXBW-NEXT: [[VEC_PHI:%.*]] = phi <16 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP180:%.*]], [[PRED_LOAD_CONTINUE62]] ]
+; CHECK-MAXBW-NEXT: [[VEC_PHI:%.*]] = phi <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[PARTIAL_REDUCE:%.*]], [[PRED_LOAD_CONTINUE62]] ]
; CHECK-MAXBW-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-MAXBW-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-MAXBW-NEXT: [[TMP2:%.*]] = add i64 [[INDEX]], 2
@@ -2615,14 +2615,14 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) {
; CHECK-MAXBW-NEXT: [[TMP177:%.*]] = phi <16 x i8> [ [[TMP172]], [[PRED_LOAD_CONTINUE60]] ], [ [[TMP176]], [[PRED_LOAD_IF61]] ]
; CHECK-MAXBW-NEXT: [[TMP178:%.*]] = sext <16 x i8> [[TMP177]] to <16 x i32>
; CHECK-MAXBW-NEXT: [[TMP179:%.*]] = mul nsw <16 x i32> [[TMP178]], [[TMP97]]
-; CHECK-MAXBW-NEXT: [[TMP180]] = add <16 x i32> [[TMP179]], [[VEC_PHI]]
-; CHECK-MAXBW-NEXT: [[TMP181:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP180]], <16 x i32> [[VEC_PHI]]
+; CHECK-MAXBW-NEXT: [[TMP180:%.*]] = select <16 x i1> [[TMP16]], <16 x i32> [[TMP179]], <16 x i32> zeroinitializer
+; CHECK-MAXBW-NEXT: [[PARTIAL_REDUCE]] = call <4 x i32> @llvm.experimental.vector.partial.reduce.add.v4i32.v16i32(<4 x i32> [[VEC_PHI]], <16 x i32> [[TMP180]])
; CHECK-MAXBW-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 16
; CHECK-MAXBW-NEXT: [[VEC_IND_NEXT]] = add <16 x i64> [[VEC_IND]], splat (i64 16)
; CHECK-MAXBW-NEXT: [[TMP182:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-MAXBW-NEXT: br i1 [[TMP182]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK-MAXBW: middle.block:
-; CHECK-MAXBW-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v16i32(<16 x i32> [[TMP181]])
+; CHECK-MAXBW-NEXT: [[TMP183:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[PARTIAL_REDUCE]])
; CHECK-MAXBW-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK-MAXBW: scalar.ph:
; CHECK-MAXBW-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll b/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll
index a0214ae88c2d6e..a2a2d231c81d11 100644
--- a/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll
@@ -1975,41 +1975,41 @@ define i32 @not_dotp_predicated_pragma(i64 %N, ptr %a, ptr %b) #0 {
; CHECK-MAXBW-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK-MAXBW: vector.ph:
; CHECK-MAXBW-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
-; CHECK-MAXBW-NEXT: [[TMP1:%.*]] = mul i64 [[TMP0]], 4
+; CHECK-MAXBW-NEXT: [[TMP1:%.*]] = mul i64 [[TMP0]], 16
; CHECK-MAXBW-NEXT: [[TMP2:%.*]] = sub i64 [[TMP1]], 1
; CHECK-MAXBW-NEXT: [[N_RND_UP:%.*]] = add i64 [[N]], [[TMP2]]
; CHECK-MAXBW-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N_RND_UP]], [[TMP1]]
; CHECK-MAXBW-NEXT: [[N_VEC:%.*]] = sub i64 [[N_RND_UP]], [[N_MOD_VF]]
; CHECK-MAXBW-NEXT: [[TMP3:%.*]] = call i64 @llvm.vscale.i64()
-; CHECK-MAXBW-NEXT: [[TMP4:%.*]] = mul i64 [[TMP3]], 4
+; CHECK-MAXBW-NEXT: [[TMP4:%.*]] = mul i64 [[TMP3]], 16
; CHECK-MAXBW-NEXT: [[TMP5:%.*]] = call i64 @llvm.vscale.i64()
-; CHECK-MAXBW-NEXT: [[TMP6:%.*]] = mul i64 [[TMP5]], 4
+; CHECK-MAXBW-NEXT: [[TMP6:%.*]] = mul i64 [[TMP5]], 16
; CHECK-MAXBW-NEXT: [[TMP7:%.*]] = sub i64 [[N]], [[TMP6]]
; CHECK-MAXBW-NEXT: [[TMP8:%.*]] = icmp ugt i64 [[N]], [[TMP6]]
; CHECK-MAXBW-NEXT: [[TMP9:%.*]] = select i1 [[TMP8]], i64 [[TMP7]], i64 0
-; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK_ENTRY:%.*]] = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 0, i64 [[N]])
+; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK_ENTRY:%.*]] = call <vscale x 16 x i1> @llvm.get.active.lane.mask.nxv16i1.i64(i64 0, i64 [[N]])
; CHECK-MAXBW-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK-MAXBW: vector.body:
; CHECK-MAXBW-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
-; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK:%.*]] = phi <vscale x 4 x i1> [ [[ACTIVE_LANE_MASK_ENTRY]], [[VECTOR_PH]] ], [ [[ACTIVE_LANE_MASK_NEXT:%.*]], [[VECTOR_BODY]] ]
+; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK:%.*]] = phi <vscale x 16 x i1> [ [[ACTIVE_LANE_MASK_ENTRY]], [[VECTOR_PH]] ], [ [[ACTIVE_LANE_MASK_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-MAXBW-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP19:%.*]], [[VECTOR_BODY]] ]
; CHECK-MAXBW-NEXT: [[TMP10:%.*]] = add i64 [[INDEX]], 0
; CHECK-MAXBW-NEXT: [[TMP11:%.*]] = getelementptr inbounds i8, ptr [[B]], i64 [[TMP10]]
; CHECK-MAXBW-NEXT: [[TMP12:%.*]] = getelementptr inbounds i8, ptr [[TMP11]], i32 0
-; CHECK-MAXBW-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <vscale x 4 x i8> @llvm.masked.load.nxv4i8.p0(ptr [[TMP12]], i32 1, <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x i8> poison)
-; CHECK-MAXBW-NEXT: [[TMP13:%.*]] = sext <vscale x 4 x i8> [[WIDE_MASKED_LOAD]] to <vscale x 4 x i32>
+; CHECK-MAXBW-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <vscale x 16 x i8> @llvm.masked.load.nxv16i8.p0(ptr [[TMP12]], i32 1, <vscale x 16 x i1> [[ACTIVE_LANE_MASK]], <vscale x 16 x i8> poison)
+; CHECK-MAXBW-NEXT: [[TMP13:%.*]] = sext <vscale x 16 x i8> [[WIDE_MASKED_LOAD]] to <vscale x 16 x i32>
; CHECK-MAXBW-NEXT: [[TMP14:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[TMP10]]
; CHECK-MAXBW-NEXT: [[TMP15:%.*]] = getelementptr inbounds i8, ptr [[TMP14]], i32 0
-; CHECK-MAXBW-NEXT: [[WIDE_MASKED_LOAD1:%.*]] = call <vscale x 4 x i8> @llvm.masked.load.nxv4i8.p0(ptr [[TMP15]], i32 1, <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x i8> poison)
-; CHECK-MAXBW-NEXT: [[TMP16:%.*]] = sext <vscale x 4 x i8> [[WIDE_MASKED_LOAD1]] to <vscale x 4 x i32>
-; CHECK-MAXBW-NEXT: [[TMP17:%.*]] = mul nsw <vscale x 4 x i32> [[TMP16]], [[TMP13]]
-; CHECK-MAXBW-NEXT: [[TMP18:%.*]] = add <vscale x 4 x i32> [[TMP17]], [[VEC_PHI]]
-; CHECK-MAXBW-NEXT: [[TMP19]] = select <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x i32> [[TMP18]], <vscale x 4 x i32> [[VEC_PHI]]
+; CHECK-MAXBW-NEXT: [[WIDE_MASKED_LOAD1:%.*]] = call <vscale x 16 x i8> @llvm.masked.load.nxv16i8.p0(ptr [[TMP15]], i32 1, <vscale x 16 x i1> [[ACTIVE_LANE_MASK]], <vscale x 16 x i8> poison)
+; CHECK-MAXBW-NEXT: [[TMP16:%.*]] = sext <vscale x 16 x i8> [[WIDE_MASKED_LOAD1]] to <vscale x 16 x i32>
+; CHECK-MAXBW-NEXT: [[TMP17:%.*]] = mul nsw <vscale x 16 x i32> [[TMP16]], [[TMP13]]
+; CHECK-MAXBW-NEXT: [[TMP18:%.*]] = select <vscale x 16 x i1> [[ACTIVE_LANE_MASK]], <vscale x 16 x i32> [[TMP17]], <vscale x 16 x i32> zeroinitializer
+; CHECK-MAXBW-NEXT: [[TMP19]] = call <vscale x 4 x i32> @llvm.experimental.vector.partial.reduce.add.nxv4i32.nxv16i32(<vscale x 4 x i32> [[VEC_PHI]], <vscale x 16 x i32> [[TMP18]])
; CHECK-MAXBW-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP4]]
-; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 [[INDEX]], i64 [[TMP9]])
-; CHECK-MAXBW-NEXT: [[TMP20:%.*]] = xor <vscale x 4 x i1> [[ACTIVE_LANE_MASK_NEXT]], splat (i1 true)
-; CHECK-MAXBW-NEXT: [[TMP21:%.*]] = extractelement <vscale x 4 x i1> [[TMP20]], i32 0
-; CHECK-MAXBW-NEXT: br i1 [[TMP21]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
+; CHECK-MAXBW-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 16 x i1> @llvm.get.active.lane.mask.nxv16i1.i64(i64 [[INDEX]], i64 [[TMP9]])
+; CHECK-MAXBW-NEXT: [[TMP21:%.*]] = xor <vscale x 16 x i1> [[ACTIVE_LANE_MASK_NEXT]], splat (i1 true)
+; CHECK-MAXBW-NEXT: [[TMP20:%.*]] = extractelement <vscale x 16 x i1> [[TMP21]], i32 0
+; CHECK-MAXBW-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK-MAXBW: middle.block:
; CHECK-MAXBW-NEXT: [[TMP22:%.*]] = call i32 @llvm.vector.reduce.add.nxv4i32(<vscale x 4 x i32> [[TMP19]])
; CHECK-MAXBW-NEXT: br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]]
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