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[VPlan] Iterate over header phis to determine FORs that need EVL fixup. NFCI #147032

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[VPlan] Iterate over header phis to determine FORs that need EVL fixup. NFCI #147032

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26ed857
[VPlan] Iterate over header phis to determine FORs that need EVL fixu…
lukel97 Jul 4, 2025
50d68b2
Avoid redundant getVPSingleValue()
lukel97 Jul 7, 2025
0f752fe
Move assert, fix typos and adjust comments
lukel97 Jul 8, 2025
5d4bac9
clang-format
lukel97 Jul 8, 2025
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78 changes: 42 additions & 36 deletions llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2187,42 +2187,48 @@ static void transformRecipestoEVLRecipes(VPlan &Plan, VPValue &EVL) {
// VPTypeAnalysis cache.
SmallVector<VPRecipeBase *> ToErase;

// Create a scalar phi to track the previous EVL if fixed-order recurrence is
// contained.
bool ContainsFORs =
any_of(Header->phis(), IsaPred<VPFirstOrderRecurrencePHIRecipe>);
if (ContainsFORs) {
// TODO: Use VPInstruction::ExplicitVectorLength to get maximum EVL.
VPValue *MaxEVL = &Plan.getVF();
// Emit VPScalarCastRecipe in preheader if VF is not a 32 bits integer.
VPBuilder Builder(LoopRegion->getPreheaderVPBB());
MaxEVL = Builder.createScalarZExtOrTrunc(MaxEVL, Type::getInt32Ty(Ctx),
TypeInfo.inferScalarType(MaxEVL),
DebugLoc());

Builder.setInsertPoint(Header, Header->getFirstNonPhi());
VPValue *PrevEVL =
Builder.createScalarPhi({MaxEVL, &EVL}, DebugLoc(), "prev.evl");

for (VPBasicBlock *VPBB : VPBlockUtils::blocksOnly<VPBasicBlock>(
vp_depth_first_deep(Plan.getVectorLoopRegion()->getEntry()))) {
for (VPRecipeBase &R : *VPBB) {
using namespace VPlanPatternMatch;
VPValue *V1, *V2;
if (!match(&R,
m_VPInstruction<VPInstruction::FirstOrderRecurrenceSplice>(
m_VPValue(V1), m_VPValue(V2))))
continue;
VPValue *Imm = Plan.getOrAddLiveIn(
ConstantInt::getSigned(Type::getInt32Ty(Ctx), -1));
VPWidenIntrinsicRecipe *VPSplice = new VPWidenIntrinsicRecipe(
Intrinsic::experimental_vp_splice,
{V1, V2, Imm, AllOneMask, PrevEVL, &EVL},
TypeInfo.inferScalarType(R.getVPSingleValue()), R.getDebugLoc());
VPSplice->insertBefore(&R);
R.getVPSingleValue()->replaceAllUsesWith(VPSplice);
ToErase.push_back(&R);
}
// Fix-up first-order recurrences
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Suggested change
// Fix-up first-order recurrences
// Replace FirstOrderRecurrenceSplice with experimental_vp_splice intrinsics.

VPValue *PrevEVL = nullptr;
for (VPRecipeBase &PhiR : Header->phis()) {
auto *FOR = dyn_cast<VPFirstOrderRecurrencePHIRecipe>(&PhiR);
if (!FOR)
continue;

// Create a scalar phi to track the previous EVL if fixed-order recurrence
// is contained.
if (!PrevEVL) {
// TODO: Use VPInstruction::ExplicitVectorLength to get maximum EVL.
VPValue *MaxEVL = &Plan.getVF();
// Emit VPScalarCastRecipe in preheader if VF is not a 32 bits integer.
VPBuilder Builder(LoopRegion->getPreheaderVPBB());
MaxEVL = Builder.createScalarZExtOrTrunc(MaxEVL, Type::getInt32Ty(Ctx),
TypeInfo.inferScalarType(MaxEVL),
DebugLoc());

Builder.setInsertPoint(Header, Header->getFirstNonPhi());
PrevEVL = Builder.createScalarPhi({MaxEVL, &EVL}, DebugLoc(), "prev.evl");
}

assert(!Plan.isUnrolled() && "When unrolled splices might not use "
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can move assert either to just after early continue in loop or even before the loop?

"VPFirstOrederRecurrencePHIRecipe!");
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Suggested change
"VPFirstOrederRecurrencePHIRecipe!");
"VPFirstOrderRecurrencePHIRecipe!");


for (VPUser *User : FOR->users()) {
auto *R = cast<VPRecipeBase>(User);
using namespace VPlanPatternMatch;
VPValue *V1, *V2;
if (!match(R, m_VPInstruction<VPInstruction::FirstOrderRecurrenceSplice>(
m_VPValue(V1), m_VPValue(V2))))
continue;
VPValue *Imm = Plan.getOrAddLiveIn(
ConstantInt::getSigned(Type::getInt32Ty(Ctx), -1));
VPWidenIntrinsicRecipe *VPSplice = new VPWidenIntrinsicRecipe(
Intrinsic::experimental_vp_splice,
{V1, V2, Imm, AllOneMask, PrevEVL, &EVL},
TypeInfo.inferScalarType(R->getVPSingleValue()), R->getDebugLoc());

VPSplice->insertBefore(R);
R->getVPSingleValue()->replaceAllUsesWith(VPSplice);
ToErase.push_back(R);
}
}

Expand Down
171 changes: 171 additions & 0 deletions ...st/Transforms/LoopVectorize/RISCV/vectorize-force-tail-with-evl-fixed-order-recurrence.ll
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Expand Up @@ -737,6 +737,173 @@ for.end:
ret void
}


define void @second_order_recurrence_indvar(ptr noalias %A, i64 %TC) {
; IF-EVL-LABEL: define void @second_order_recurrence_indvar(
; IF-EVL-SAME: ptr noalias [[A:%.*]], i64 [[TC:%.*]]) #[[ATTR0]] {
; IF-EVL-NEXT: [[ENTRY:.*]]:
; IF-EVL-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; IF-EVL: [[VECTOR_PH]]:
; IF-EVL-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; IF-EVL-NEXT: [[TMP1:%.*]] = mul nuw i64 [[TMP0]], 2
; IF-EVL-NEXT: [[TMP2:%.*]] = sub i64 [[TMP1]], 1
; IF-EVL-NEXT: [[N_RND_UP:%.*]] = add i64 [[TC]], [[TMP2]]
; IF-EVL-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N_RND_UP]], [[TMP1]]
; IF-EVL-NEXT: [[N_VEC:%.*]] = sub i64 [[N_RND_UP]], [[N_MOD_VF]]
; IF-EVL-NEXT: [[TMP3:%.*]] = call i64 @llvm.vscale.i64()
; IF-EVL-NEXT: [[TMP4:%.*]] = mul nuw i64 [[TMP3]], 2
; IF-EVL-NEXT: [[TMP5:%.*]] = trunc i64 [[TMP4]] to i32
; IF-EVL-NEXT: [[TMP6:%.*]] = call <vscale x 2 x i64> @llvm.stepvector.nxv2i64()
; IF-EVL-NEXT: [[TMP7:%.*]] = mul <vscale x 2 x i64> [[TMP6]], splat (i64 1)
; IF-EVL-NEXT: [[INDUCTION:%.*]] = add <vscale x 2 x i64> zeroinitializer, [[TMP7]]
; IF-EVL-NEXT: [[TMP8:%.*]] = call i32 @llvm.vscale.i32()
; IF-EVL-NEXT: [[TMP9:%.*]] = mul nuw i32 [[TMP8]], 2
; IF-EVL-NEXT: [[TMP10:%.*]] = sub i32 [[TMP9]], 1
; IF-EVL-NEXT: [[VECTOR_RECUR_INIT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 33, i32 [[TMP10]]
; IF-EVL-NEXT: [[TMP11:%.*]] = call i32 @llvm.vscale.i32()
; IF-EVL-NEXT: [[TMP12:%.*]] = mul nuw i32 [[TMP11]], 2
; IF-EVL-NEXT: [[TMP13:%.*]] = sub i32 [[TMP12]], 1
; IF-EVL-NEXT: [[VECTOR_RECUR_INIT1:%.*]] = insertelement <vscale x 2 x i64> poison, i64 33, i32 [[TMP13]]
; IF-EVL-NEXT: br label %[[VECTOR_BODY:.*]]
; IF-EVL: [[VECTOR_BODY]]:
; IF-EVL-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[EVL_BASED_IV:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[VEC_IND:%.*]] = phi <vscale x 2 x i64> [ [[INDUCTION]], %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[VECTOR_RECUR:%.*]] = phi <vscale x 2 x i64> [ [[VECTOR_RECUR_INIT]], %[[VECTOR_PH]] ], [ [[TMP17:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[VECTOR_RECUR2:%.*]] = phi <vscale x 2 x i64> [ [[VECTOR_RECUR_INIT1]], %[[VECTOR_PH]] ], [ [[TMP18:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[PREV_EVL:%.*]] = phi i32 [ [[TMP5]], %[[VECTOR_PH]] ], [ [[TMP14:%.*]], %[[VECTOR_BODY]] ]
; IF-EVL-NEXT: [[AVL:%.*]] = sub i64 [[TC]], [[EVL_BASED_IV]]
; IF-EVL-NEXT: [[TMP14]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 2, i1 true)
; IF-EVL-NEXT: [[TMP15:%.*]] = zext i32 [[TMP14]] to i64
; IF-EVL-NEXT: [[TMP16:%.*]] = mul i64 1, [[TMP15]]
; IF-EVL-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP16]], i64 0
; IF-EVL-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
; IF-EVL-NEXT: [[TMP17]] = add <vscale x 2 x i64> [[VEC_IND]], splat (i64 42)
; IF-EVL-NEXT: [[TMP18]] = call <vscale x 2 x i64> @llvm.experimental.vp.splice.nxv2i64(<vscale x 2 x i64> [[VECTOR_RECUR]], <vscale x 2 x i64> [[TMP17]], i32 -1, <vscale x 2 x i1> splat (i1 true), i32 [[PREV_EVL]], i32 [[TMP14]])
; IF-EVL-NEXT: [[TMP19:%.*]] = call <vscale x 2 x i64> @llvm.experimental.vp.splice.nxv2i64(<vscale x 2 x i64> [[VECTOR_RECUR2]], <vscale x 2 x i64> [[TMP18]], i32 -1, <vscale x 2 x i1> splat (i1 true), i32 [[PREV_EVL]], i32 [[TMP14]])
; IF-EVL-NEXT: [[TMP20:%.*]] = getelementptr inbounds nuw i64, ptr [[A]], i64 [[EVL_BASED_IV]]
; IF-EVL-NEXT: [[TMP21:%.*]] = getelementptr inbounds nuw i64, ptr [[TMP20]], i32 0
; IF-EVL-NEXT: call void @llvm.vp.store.nxv2i64.p0(<vscale x 2 x i64> [[TMP19]], ptr align 8 [[TMP21]], <vscale x 2 x i1> splat (i1 true), i32 [[TMP14]])
; IF-EVL-NEXT: [[TMP22:%.*]] = zext i32 [[TMP14]] to i64
; IF-EVL-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP22]], [[EVL_BASED_IV]]
; IF-EVL-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP4]]
; IF-EVL-NEXT: [[VEC_IND_NEXT]] = add <vscale x 2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; IF-EVL-NEXT: [[TMP23:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; IF-EVL-NEXT: br i1 [[TMP23]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP13:![0-9]+]]
; IF-EVL: [[MIDDLE_BLOCK]]:
; IF-EVL-NEXT: br label %[[FOR_END:.*]]
; IF-EVL: [[SCALAR_PH]]:
; IF-EVL-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 0, %[[ENTRY]] ]
; IF-EVL-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ 33, %[[ENTRY]] ]
; IF-EVL-NEXT: [[SCALAR_RECUR_INIT3:%.*]] = phi i64 [ 33, %[[ENTRY]] ]
; IF-EVL-NEXT: br label %[[FOR_BODY:.*]]
; IF-EVL: [[FOR_BODY]]:
; IF-EVL-NEXT: [[INDVARS:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[INDVARS_NEXT:%.*]], %[[FOR_BODY]] ]
; IF-EVL-NEXT: [[FOR1:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], %[[SCALAR_PH]] ], [ [[X:%.*]], %[[FOR_BODY]] ]
; IF-EVL-NEXT: [[FOR2:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT3]], %[[SCALAR_PH]] ], [ [[FOR1]], %[[FOR_BODY]] ]
; IF-EVL-NEXT: [[X]] = add i64 [[INDVARS]], 42
; IF-EVL-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i64, ptr [[A]], i64 [[INDVARS]]
; IF-EVL-NEXT: store i64 [[FOR2]], ptr [[ARRAYIDX]], align 8
; IF-EVL-NEXT: [[INDVARS_NEXT]] = add nuw nsw i64 [[INDVARS]], 1
; IF-EVL-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDVARS_NEXT]], [[TC]]
; IF-EVL-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; IF-EVL: [[FOR_END]]:
; IF-EVL-NEXT: ret void
;
; NO-VP-LABEL: define void @second_order_recurrence_indvar(
; NO-VP-SAME: ptr noalias [[A:%.*]], i64 [[TC:%.*]]) #[[ATTR0]] {
; NO-VP-NEXT: [[ENTRY:.*]]:
; NO-VP-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT: [[TMP1:%.*]] = mul nuw i64 [[TMP0]], 2
; NO-VP-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TC]], [[TMP1]]
; NO-VP-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; NO-VP: [[VECTOR_PH]]:
; NO-VP-NEXT: [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT: [[TMP3:%.*]] = mul nuw i64 [[TMP2]], 2
; NO-VP-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[TC]], [[TMP3]]
; NO-VP-NEXT: [[N_VEC:%.*]] = sub i64 [[TC]], [[N_MOD_VF]]
; NO-VP-NEXT: [[TMP4:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT: [[TMP5:%.*]] = mul nuw i64 [[TMP4]], 2
; NO-VP-NEXT: [[TMP6:%.*]] = call <vscale x 2 x i64> @llvm.stepvector.nxv2i64()
; NO-VP-NEXT: [[TMP7:%.*]] = mul <vscale x 2 x i64> [[TMP6]], splat (i64 1)
; NO-VP-NEXT: [[INDUCTION:%.*]] = add <vscale x 2 x i64> zeroinitializer, [[TMP7]]
; NO-VP-NEXT: [[TMP8:%.*]] = mul i64 1, [[TMP5]]
; NO-VP-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP8]], i64 0
; NO-VP-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
; NO-VP-NEXT: [[TMP9:%.*]] = call i32 @llvm.vscale.i32()
; NO-VP-NEXT: [[TMP10:%.*]] = mul nuw i32 [[TMP9]], 2
; NO-VP-NEXT: [[TMP11:%.*]] = sub i32 [[TMP10]], 1
; NO-VP-NEXT: [[VECTOR_RECUR_INIT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 33, i32 [[TMP11]]
; NO-VP-NEXT: [[TMP12:%.*]] = call i32 @llvm.vscale.i32()
; NO-VP-NEXT: [[TMP13:%.*]] = mul nuw i32 [[TMP12]], 2
; NO-VP-NEXT: [[TMP14:%.*]] = sub i32 [[TMP13]], 1
; NO-VP-NEXT: [[VECTOR_RECUR_INIT1:%.*]] = insertelement <vscale x 2 x i64> poison, i64 33, i32 [[TMP14]]
; NO-VP-NEXT: br label %[[VECTOR_BODY:.*]]
; NO-VP: [[VECTOR_BODY]]:
; NO-VP-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; NO-VP-NEXT: [[VEC_IND:%.*]] = phi <vscale x 2 x i64> [ [[INDUCTION]], %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; NO-VP-NEXT: [[VECTOR_RECUR:%.*]] = phi <vscale x 2 x i64> [ [[VECTOR_RECUR_INIT]], %[[VECTOR_PH]] ], [ [[TMP15:%.*]], %[[VECTOR_BODY]] ]
; NO-VP-NEXT: [[VECTOR_RECUR2:%.*]] = phi <vscale x 2 x i64> [ [[VECTOR_RECUR_INIT1]], %[[VECTOR_PH]] ], [ [[TMP16:%.*]], %[[VECTOR_BODY]] ]
; NO-VP-NEXT: [[TMP15]] = add <vscale x 2 x i64> [[VEC_IND]], splat (i64 42)
; NO-VP-NEXT: [[TMP16]] = call <vscale x 2 x i64> @llvm.vector.splice.nxv2i64(<vscale x 2 x i64> [[VECTOR_RECUR]], <vscale x 2 x i64> [[TMP15]], i32 -1)
; NO-VP-NEXT: [[TMP17:%.*]] = call <vscale x 2 x i64> @llvm.vector.splice.nxv2i64(<vscale x 2 x i64> [[VECTOR_RECUR2]], <vscale x 2 x i64> [[TMP16]], i32 -1)
; NO-VP-NEXT: [[TMP18:%.*]] = getelementptr inbounds nuw i64, ptr [[A]], i64 [[INDEX]]
; NO-VP-NEXT: [[TMP19:%.*]] = getelementptr inbounds nuw i64, ptr [[TMP18]], i32 0
; NO-VP-NEXT: store <vscale x 2 x i64> [[TMP17]], ptr [[TMP19]], align 8
; NO-VP-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP5]]
; NO-VP-NEXT: [[VEC_IND_NEXT]] = add <vscale x 2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; NO-VP-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; NO-VP-NEXT: br i1 [[TMP20]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
; NO-VP: [[MIDDLE_BLOCK]]:
; NO-VP-NEXT: [[TMP21:%.*]] = call i32 @llvm.vscale.i32()
; NO-VP-NEXT: [[TMP22:%.*]] = mul nuw i32 [[TMP21]], 2
; NO-VP-NEXT: [[TMP23:%.*]] = sub i32 [[TMP22]], 1
; NO-VP-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <vscale x 2 x i64> [[TMP15]], i32 [[TMP23]]
; NO-VP-NEXT: [[TMP24:%.*]] = call i32 @llvm.vscale.i32()
; NO-VP-NEXT: [[TMP25:%.*]] = mul nuw i32 [[TMP24]], 2
; NO-VP-NEXT: [[TMP26:%.*]] = sub i32 [[TMP25]], 1
; NO-VP-NEXT: [[VECTOR_RECUR_EXTRACT3:%.*]] = extractelement <vscale x 2 x i64> [[TMP16]], i32 [[TMP26]]
; NO-VP-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TC]], [[N_VEC]]
; NO-VP-NEXT: br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[SCALAR_PH]]
; NO-VP: [[SCALAR_PH]]:
; NO-VP-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; NO-VP-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], %[[MIDDLE_BLOCK]] ], [ 33, %[[ENTRY]] ]
; NO-VP-NEXT: [[SCALAR_RECUR_INIT4:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT3]], %[[MIDDLE_BLOCK]] ], [ 33, %[[ENTRY]] ]
; NO-VP-NEXT: br label %[[FOR_BODY:.*]]
; NO-VP: [[FOR_BODY]]:
; NO-VP-NEXT: [[INDVARS:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[INDVARS_NEXT:%.*]], %[[FOR_BODY]] ]
; NO-VP-NEXT: [[FOR1:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], %[[SCALAR_PH]] ], [ [[X:%.*]], %[[FOR_BODY]] ]
; NO-VP-NEXT: [[FOR2:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT4]], %[[SCALAR_PH]] ], [ [[FOR1]], %[[FOR_BODY]] ]
; NO-VP-NEXT: [[X]] = add i64 [[INDVARS]], 42
; NO-VP-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i64, ptr [[A]], i64 [[INDVARS]]
; NO-VP-NEXT: store i64 [[FOR2]], ptr [[ARRAYIDX]], align 8
; NO-VP-NEXT: [[INDVARS_NEXT]] = add nuw nsw i64 [[INDVARS]], 1
; NO-VP-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDVARS_NEXT]], [[TC]]
; NO-VP-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP13:![0-9]+]]
; NO-VP: [[FOR_END]]:
; NO-VP-NEXT: ret void
;
entry:
br label %for.body

for.body:
%indvars = phi i64 [ 0, %entry ], [ %indvars.next, %for.body ]
%for1 = phi i64 [ 33, %entry ], [ %x, %for.body ]
%for2 = phi i64 [ 33, %entry ], [ %for1, %for.body ]

%x = add i64 %indvars, 42

%arrayidx = getelementptr inbounds nuw i64, ptr %A, i64 %indvars
store i64 %for2, ptr %arrayidx

%indvars.next = add nuw nsw i64 %indvars, 1
%exitcond.not = icmp eq i64 %indvars.next, %TC
br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !0

for.end:
ret void
}

!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.vectorize.enable", i1 true}
;.
Expand All @@ -753,6 +920,8 @@ for.end:
; IF-EVL: [[META10]] = !{!"llvm.loop.vectorize.enable", i1 true}
; IF-EVL: [[LOOP11]] = distinct !{[[LOOP11]], [[META1]], [[META2]], [[META3]]}
; IF-EVL: [[LOOP12]] = distinct !{[[LOOP12]], [[META3]], [[META1]]}
; IF-EVL: [[LOOP13]] = distinct !{[[LOOP13]], [[META1]], [[META2]], [[META3]]}
; IF-EVL: [[LOOP14]] = distinct !{[[LOOP14]], [[META3]], [[META1]]}
;.
; NO-VP: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; NO-VP: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
Expand All @@ -766,4 +935,6 @@ for.end:
; NO-VP: [[LOOP9]] = distinct !{[[LOOP9]], [[META2]], [[META1]]}
; NO-VP: [[LOOP10]] = distinct !{[[LOOP10]], [[META1]], [[META2]]}
; NO-VP: [[LOOP11]] = distinct !{[[LOOP11]], [[META2]], [[META1]]}
; NO-VP: [[LOOP12]] = distinct !{[[LOOP12]], [[META1]], [[META2]]}
; NO-VP: [[LOOP13]] = distinct !{[[LOOP13]], [[META2]], [[META1]]}
;.
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