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[LLVM][VPlan] Pick more optimal initial value for VPBlend. #104019

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Merged
merged 4 commits into from
Aug 30, 2024
Merged

[LLVM][VPlan] Pick more optimal initial value for VPBlend. #104019

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0da1df8
[LLVM][VPlan] Pick more optimal initial value for VPBlend.
paulwalker-arm Aug 13, 2024
dd18475
Fix typo in comment.
paulwalker-arm Aug 21, 2024
2b3c8b3
Update vblend transformation comment.
paulwalker-arm Aug 22, 2024
ab41846
Add multi variable test case for if-converson-nest.
paulwalker-arm Aug 27, 2024
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12 changes: 12 additions & 0 deletions llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
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Expand Up @@ -918,6 +918,17 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
// value with the others blended into it.

unsigned StartIndex = 0;
for (unsigned I = 0; I != Blend->getNumIncomingValues(); ++I) {
// If a value's mask is used only by the blend then is can be deadcoded.
// TODO: Find the most expensive mask that can be deadcoded, or a mask
// that's used by multiple blends where it can be removed from them all.
VPValue *Mask = Blend->getMask(I);
if (Mask->getNumUsers() == 1 && !match(Mask, m_False())) {
StartIndex = I;
break;
}
}

SmallVector<VPValue *, 4> OperandsWithMask;
OperandsWithMask.push_back(Blend->getIncomingValue(StartIndex));

Expand Down Expand Up @@ -996,6 +1007,7 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
m_LogicalAnd(m_VPValue(X1), m_Not(m_VPValue(Y1))))) &&
X == X1 && Y == Y1) {
R.getVPSingleValue()->replaceAllUsesWith(X);
R.eraseFromParent();
return;
}

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48 changes: 21 additions & 27 deletions llvm/test/Transforms/LoopVectorize/AArch64/masked-call.ll
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Expand Up @@ -215,16 +215,14 @@ define void @test_if_then(ptr noalias %a, ptr readnone %b) #4 {
; TFCOMMON-NEXT: [[TMP6:%.*]] = icmp ugt <vscale x 2 x i64> [[WIDE_MASKED_LOAD]], shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 50, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
; TFCOMMON-NEXT: [[TMP7:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i1> [[TMP6]], <vscale x 2 x i1> zeroinitializer
; TFCOMMON-NEXT: [[TMP8:%.*]] = call <vscale x 2 x i64> @foo_vector(<vscale x 2 x i64> [[WIDE_MASKED_LOAD]], <vscale x 2 x i1> [[TMP7]])
; TFCOMMON-NEXT: [[TMP9:%.*]] = xor <vscale x 2 x i1> [[TMP6]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFCOMMON-NEXT: [[TMP10:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i1> [[TMP9]], <vscale x 2 x i1> zeroinitializer
; TFCOMMON-NEXT: [[PREDPHI:%.*]] = select <vscale x 2 x i1> [[TMP10]], <vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> [[TMP8]]
; TFCOMMON-NEXT: [[TMP11:%.*]] = getelementptr inbounds i64, ptr [[B:%.*]], i64 [[INDEX]]
; TFCOMMON-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI]], ptr [[TMP11]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
; TFCOMMON-NEXT: [[PREDPHI:%.*]] = select <vscale x 2 x i1> [[TMP7]], <vscale x 2 x i64> [[TMP8]], <vscale x 2 x i64> zeroinitializer
; TFCOMMON-NEXT: [[TMP9:%.*]] = getelementptr inbounds i64, ptr [[B:%.*]], i64 [[INDEX]]
; TFCOMMON-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI]], ptr [[TMP9]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
; TFCOMMON-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP4]]
; TFCOMMON-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[INDEX_NEXT]], i64 1025)
; TFCOMMON-NEXT: [[TMP12:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFCOMMON-NEXT: [[TMP13:%.*]] = extractelement <vscale x 2 x i1> [[TMP12]], i32 0
; TFCOMMON-NEXT: br i1 [[TMP13]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; TFCOMMON-NEXT: [[TMP10:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFCOMMON-NEXT: [[TMP11:%.*]] = extractelement <vscale x 2 x i1> [[TMP10]], i32 0
; TFCOMMON-NEXT: br i1 [[TMP11]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; TFCOMMON: for.cond.cleanup:
; TFCOMMON-NEXT: ret void
;
Expand Down Expand Up @@ -259,27 +257,23 @@ define void @test_if_then(ptr noalias %a, ptr readnone %b) #4 {
; TFA_INTERLEAVE-NEXT: [[TMP14:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK2]], <vscale x 2 x i1> [[TMP12]], <vscale x 2 x i1> zeroinitializer
; TFA_INTERLEAVE-NEXT: [[TMP15:%.*]] = call <vscale x 2 x i64> @foo_vector(<vscale x 2 x i64> [[WIDE_MASKED_LOAD]], <vscale x 2 x i1> [[TMP13]])
; TFA_INTERLEAVE-NEXT: [[TMP16:%.*]] = call <vscale x 2 x i64> @foo_vector(<vscale x 2 x i64> [[WIDE_MASKED_LOAD3]], <vscale x 2 x i1> [[TMP14]])
; TFA_INTERLEAVE-NEXT: [[TMP17:%.*]] = xor <vscale x 2 x i1> [[TMP11]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFA_INTERLEAVE-NEXT: [[TMP18:%.*]] = xor <vscale x 2 x i1> [[TMP12]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFA_INTERLEAVE-NEXT: [[TMP19:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i1> [[TMP17]], <vscale x 2 x i1> zeroinitializer
; TFA_INTERLEAVE-NEXT: [[TMP20:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK2]], <vscale x 2 x i1> [[TMP18]], <vscale x 2 x i1> zeroinitializer
; TFA_INTERLEAVE-NEXT: [[PREDPHI:%.*]] = select <vscale x 2 x i1> [[TMP19]], <vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> [[TMP15]]
; TFA_INTERLEAVE-NEXT: [[PREDPHI4:%.*]] = select <vscale x 2 x i1> [[TMP20]], <vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> [[TMP16]]
; TFA_INTERLEAVE-NEXT: [[TMP21:%.*]] = getelementptr inbounds i64, ptr [[B:%.*]], i64 [[INDEX]]
; TFA_INTERLEAVE-NEXT: [[TMP22:%.*]] = call i64 @llvm.vscale.i64()
; TFA_INTERLEAVE-NEXT: [[TMP23:%.*]] = mul i64 [[TMP22]], 2
; TFA_INTERLEAVE-NEXT: [[TMP24:%.*]] = getelementptr inbounds i64, ptr [[TMP21]], i64 [[TMP23]]
; TFA_INTERLEAVE-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI]], ptr [[TMP21]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
; TFA_INTERLEAVE-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI4]], ptr [[TMP24]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK2]])
; TFA_INTERLEAVE-NEXT: [[PREDPHI:%.*]] = select <vscale x 2 x i1> [[TMP13]], <vscale x 2 x i64> [[TMP15]], <vscale x 2 x i64> zeroinitializer
; TFA_INTERLEAVE-NEXT: [[PREDPHI4:%.*]] = select <vscale x 2 x i1> [[TMP14]], <vscale x 2 x i64> [[TMP16]], <vscale x 2 x i64> zeroinitializer
; TFA_INTERLEAVE-NEXT: [[TMP17:%.*]] = getelementptr inbounds i64, ptr [[B:%.*]], i64 [[INDEX]]
; TFA_INTERLEAVE-NEXT: [[TMP18:%.*]] = call i64 @llvm.vscale.i64()
; TFA_INTERLEAVE-NEXT: [[TMP19:%.*]] = mul i64 [[TMP18]], 2
; TFA_INTERLEAVE-NEXT: [[TMP20:%.*]] = getelementptr inbounds i64, ptr [[TMP17]], i64 [[TMP19]]
; TFA_INTERLEAVE-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI]], ptr [[TMP17]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
; TFA_INTERLEAVE-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[PREDPHI4]], ptr [[TMP20]], i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK2]])
; TFA_INTERLEAVE-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP4]]
; TFA_INTERLEAVE-NEXT: [[TMP25:%.*]] = call i64 @llvm.vscale.i64()
; TFA_INTERLEAVE-NEXT: [[TMP26:%.*]] = mul i64 [[TMP25]], 2
; TFA_INTERLEAVE-NEXT: [[TMP27:%.*]] = add i64 [[INDEX_NEXT]], [[TMP26]]
; TFA_INTERLEAVE-NEXT: [[TMP21:%.*]] = call i64 @llvm.vscale.i64()
; TFA_INTERLEAVE-NEXT: [[TMP22:%.*]] = mul i64 [[TMP21]], 2
; TFA_INTERLEAVE-NEXT: [[TMP23:%.*]] = add i64 [[INDEX_NEXT]], [[TMP22]]
; TFA_INTERLEAVE-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[INDEX_NEXT]], i64 1025)
; TFA_INTERLEAVE-NEXT: [[ACTIVE_LANE_MASK_NEXT5]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[TMP27]], i64 1025)
; TFA_INTERLEAVE-NEXT: [[TMP28:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFA_INTERLEAVE-NEXT: [[TMP29:%.*]] = extractelement <vscale x 2 x i1> [[TMP28]], i32 0
; TFA_INTERLEAVE-NEXT: br i1 [[TMP29]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; TFA_INTERLEAVE-NEXT: [[ACTIVE_LANE_MASK_NEXT5]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[TMP23]], i64 1025)
; TFA_INTERLEAVE-NEXT: [[TMP24:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
; TFA_INTERLEAVE-NEXT: [[TMP25:%.*]] = extractelement <vscale x 2 x i1> [[TMP24]], i32 0
; TFA_INTERLEAVE-NEXT: br i1 [[TMP25]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; TFA_INTERLEAVE: for.cond.cleanup:
; TFA_INTERLEAVE-NEXT: ret void
;
Expand Down
28 changes: 13 additions & 15 deletions llvm/test/Transforms/LoopVectorize/AArch64/scalable-strict-fadd.ll
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Expand Up @@ -1216,7 +1216,7 @@ define float @fadd_conditional(ptr noalias nocapture readonly %a, ptr noalias no
; CHECK-ORDERED-TF: vector.body:
; CHECK-ORDERED-TF-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[ACTIVE_LANE_MASK:%.*]] = phi <vscale x 4 x i1> [ [[ACTIVE_LANE_MASK_ENTRY]], [[VECTOR_PH]] ], [ [[ACTIVE_LANE_MASK_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[VEC_PHI:%.*]] = phi float [ 1.000000e+00, [[VECTOR_PH]] ], [ [[TMP20:%.*]], [[VECTOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[VEC_PHI:%.*]] = phi float [ 1.000000e+00, [[VECTOR_PH]] ], [ [[TMP18:%.*]], [[VECTOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[TMP10:%.*]] = add i64 [[INDEX]], 0
; CHECK-ORDERED-TF-NEXT: [[TMP11:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[TMP10]]
; CHECK-ORDERED-TF-NEXT: [[TMP12:%.*]] = getelementptr inbounds float, ptr [[TMP11]], i32 0
Expand All @@ -1226,41 +1226,39 @@ define float @fadd_conditional(ptr noalias nocapture readonly %a, ptr noalias no
; CHECK-ORDERED-TF-NEXT: [[TMP15:%.*]] = getelementptr float, ptr [[A]], i64 [[TMP10]]
; CHECK-ORDERED-TF-NEXT: [[TMP16:%.*]] = getelementptr float, ptr [[TMP15]], i32 0
; CHECK-ORDERED-TF-NEXT: [[WIDE_MASKED_LOAD1:%.*]] = call <vscale x 4 x float> @llvm.masked.load.nxv4f32.p0(ptr [[TMP16]], i32 4, <vscale x 4 x i1> [[TMP14]], <vscale x 4 x float> poison)
; CHECK-ORDERED-TF-NEXT: [[TMP17:%.*]] = xor <vscale x 4 x i1> [[TMP13]], shufflevector (<vscale x 4 x i1> insertelement (<vscale x 4 x i1> poison, i1 true, i64 0), <vscale x 4 x i1> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP18:%.*]] = select <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x i1> [[TMP17]], <vscale x 4 x i1> zeroinitializer
; CHECK-ORDERED-TF-NEXT: [[PREDPHI:%.*]] = select <vscale x 4 x i1> [[TMP18]], <vscale x 4 x float> shufflevector (<vscale x 4 x float> insertelement (<vscale x 4 x float> poison, float 3.000000e+00, i64 0), <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer), <vscale x 4 x float> [[WIDE_MASKED_LOAD1]]
; CHECK-ORDERED-TF-NEXT: [[TMP19:%.*]] = select <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x float> [[PREDPHI]], <vscale x 4 x float> shufflevector (<vscale x 4 x float> insertelement (<vscale x 4 x float> poison, float -0.000000e+00, i64 0), <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP20]] = call float @llvm.vector.reduce.fadd.nxv4f32(float [[VEC_PHI]], <vscale x 4 x float> [[TMP19]])
; CHECK-ORDERED-TF-NEXT: [[PREDPHI:%.*]] = select <vscale x 4 x i1> [[TMP14]], <vscale x 4 x float> [[WIDE_MASKED_LOAD1]], <vscale x 4 x float> shufflevector (<vscale x 4 x float> insertelement (<vscale x 4 x float> poison, float 3.000000e+00, i64 0), <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP17:%.*]] = select <vscale x 4 x i1> [[ACTIVE_LANE_MASK]], <vscale x 4 x float> [[PREDPHI]], <vscale x 4 x float> shufflevector (<vscale x 4 x float> insertelement (<vscale x 4 x float> poison, float -0.000000e+00, i64 0), <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP18]] = call float @llvm.vector.reduce.fadd.nxv4f32(float [[VEC_PHI]], <vscale x 4 x float> [[TMP17]])
; CHECK-ORDERED-TF-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP4]]
; CHECK-ORDERED-TF-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 [[INDEX]], i64 [[TMP9]])
; CHECK-ORDERED-TF-NEXT: [[TMP21:%.*]] = xor <vscale x 4 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 4 x i1> insertelement (<vscale x 4 x i1> poison, i1 true, i64 0), <vscale x 4 x i1> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP22:%.*]] = extractelement <vscale x 4 x i1> [[TMP21]], i32 0
; CHECK-ORDERED-TF-NEXT: br i1 [[TMP22]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK-ORDERED-TF-NEXT: [[TMP19:%.*]] = xor <vscale x 4 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 4 x i1> insertelement (<vscale x 4 x i1> poison, i1 true, i64 0), <vscale x 4 x i1> poison, <vscale x 4 x i32> zeroinitializer)
; CHECK-ORDERED-TF-NEXT: [[TMP20:%.*]] = extractelement <vscale x 4 x i1> [[TMP19]], i32 0
; CHECK-ORDERED-TF-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK-ORDERED-TF: middle.block:
; CHECK-ORDERED-TF-NEXT: br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
; CHECK-ORDERED-TF: scalar.ph:
; CHECK-ORDERED-TF-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-ORDERED-TF-NEXT: [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP20]], [[MIDDLE_BLOCK]] ], [ 1.000000e+00, [[ENTRY]] ]
; CHECK-ORDERED-TF-NEXT: [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP18]], [[MIDDLE_BLOCK]] ], [ 1.000000e+00, [[ENTRY]] ]
; CHECK-ORDERED-TF-NEXT: br label [[FOR_BODY:%.*]]
; CHECK-ORDERED-TF: for.body:
; CHECK-ORDERED-TF-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_INC:%.*]] ]
; CHECK-ORDERED-TF-NEXT: [[RES:%.*]] = phi float [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[FADD:%.*]], [[FOR_INC]] ]
; CHECK-ORDERED-TF-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[IV]]
; CHECK-ORDERED-TF-NEXT: [[TMP23:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-ORDERED-TF-NEXT: [[TOBOOL:%.*]] = fcmp une float [[TMP23]], 0.000000e+00
; CHECK-ORDERED-TF-NEXT: [[TMP21:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-ORDERED-TF-NEXT: [[TOBOOL:%.*]] = fcmp une float [[TMP21]], 0.000000e+00
; CHECK-ORDERED-TF-NEXT: br i1 [[TOBOOL]], label [[IF_THEN:%.*]], label [[FOR_INC]]
; CHECK-ORDERED-TF: if.then:
; CHECK-ORDERED-TF-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[IV]]
; CHECK-ORDERED-TF-NEXT: [[TMP24:%.*]] = load float, ptr [[ARRAYIDX2]], align 4
; CHECK-ORDERED-TF-NEXT: [[TMP22:%.*]] = load float, ptr [[ARRAYIDX2]], align 4
; CHECK-ORDERED-TF-NEXT: br label [[FOR_INC]]
; CHECK-ORDERED-TF: for.inc:
; CHECK-ORDERED-TF-NEXT: [[PHI:%.*]] = phi float [ [[TMP24]], [[IF_THEN]] ], [ 3.000000e+00, [[FOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[PHI:%.*]] = phi float [ [[TMP22]], [[IF_THEN]] ], [ 3.000000e+00, [[FOR_BODY]] ]
; CHECK-ORDERED-TF-NEXT: [[FADD]] = fadd float [[RES]], [[PHI]]
; CHECK-ORDERED-TF-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-ORDERED-TF-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-ORDERED-TF-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK-ORDERED-TF: for.end:
; CHECK-ORDERED-TF-NEXT: [[RDX:%.*]] = phi float [ [[FADD]], [[FOR_INC]] ], [ [[TMP20]], [[MIDDLE_BLOCK]] ]
; CHECK-ORDERED-TF-NEXT: [[RDX:%.*]] = phi float [ [[FADD]], [[FOR_INC]] ], [ [[TMP18]], [[MIDDLE_BLOCK]] ]
; CHECK-ORDERED-TF-NEXT: ret float [[RDX]]
;

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