[COST][AARCH64] Improve cost of reverse shuffles for AArch64.

[ABataev]

Summary

Introduced the cost of thre reverse shuffles for AArch64, currently just
copied the costs for PermuteSingleSrc.

[dmgreen]

llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp

1483

Can you add them here, before any "nx" scalable vectors.

1494

Can be 2. REV64; EXT

1497

Same here.

[ABataev]

Address comments.

[dmgreen]

Thanks. LGTM

llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp

1483

This can say something like "Reverse can are lowered with rev.

[ABataev]

llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp

1483

Ok,will add

llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp

 InstructionCost AArch64TTIImpl::getShuffleCost(TTI::ShuffleKind Kind,
                                                VectorType *Tp,
                                                ArrayRef<int> Mask, int Index,
                                                VectorType *SubTp) {
   if (Kind == TTI::SK_Broadcast || Kind == TTI::SK_Transpose ||
       Kind == TTI::SK_Select || Kind == TTI::SK_PermuteSingleSrc ||
       Kind == TTI::SK_Reverse) {
     static const CostTblEntry ShuffleTbl[] = {
       // Broadcast shuffle kinds can be performed with 'dup'.
       { TTI::SK_Broadcast, MVT::v8i8,  1 },
       { TTI::SK_Broadcast, MVT::v16i8, 1 },
       { TTI::SK_Broadcast, MVT::v4i16, 1 },
       { TTI::SK_Broadcast, MVT::v8i16, 1 },
       { TTI::SK_Broadcast, MVT::v2i32, 1 },
       { TTI::SK_Broadcast, MVT::v4i32, 1 },
       { TTI::SK_Broadcast, MVT::v2i64, 1 },
       { TTI::SK_Broadcast, MVT::v2f32, 1 },
static const CostTblEntry ShuffleTbl[] = {
       // PermuteSingleSrc shuffle kinds.
       // TODO: handle vXi8/vXi16.
       { TTI::SK_PermuteSingleSrc, MVT::v2i32, 1 }, // mov.
       { TTI::SK_PermuteSingleSrc, MVT::v4i32, 3 }, // perfectshuffle worst case.
       { TTI::SK_PermuteSingleSrc, MVT::v2i64, 1 }, // mov.
       { TTI::SK_PermuteSingleSrc, MVT::v2f32, 1 }, // mov.
       { TTI::SK_PermuteSingleSrc, MVT::v4f32, 3 }, // perfectshuffle worst case.
       { TTI::SK_PermuteSingleSrc, MVT::v2f64, 1 }, // mov.
       // Broadcast shuffle kinds for scalable vectors
       { TTI::SK_Broadcast, MVT::nxv16i8,  1 },
       { TTI::SK_Broadcast, MVT::nxv8i16,  1 },
       { TTI::SK_Broadcast, MVT::nxv4i32,  1 },
       { TTI::SK_Broadcast, MVT::nxv2i64,  1 },
       { TTI::SK_Broadcast, MVT::nxv8f16,  1 },
       { TTI::SK_Broadcast, MVT::nxv8bf16, 1 },
       { TTI::SK_Broadcast, MVT::nxv4f32,  1 },
       { TTI::SK_Broadcast, MVT::nxv2f64,  1 },
+      // The cost of reverse is just copied from PermuteSingleSrc.
+      { TTI::SK_Reverse, MVT::v2i32, 1 }, // mov.
+      { TTI::SK_Reverse, MVT::v4i32, 3 }, // perfectshuffle worst case.
+      { TTI::SK_Reverse, MVT::v2i64, 1 }, // mov.
+      { TTI::SK_Reverse, MVT::v2f32, 1 }, // mov.
+      { TTI::SK_Reverse, MVT::v4f32, 3 }, // perfectshuffle worst case.
+      { TTI::SK_Reverse, MVT::v2f64, 1 }, // mov.
       // Handle the cases for vector.reverse with scalable vectors
       { TTI::SK_Reverse, MVT::nxv16i8,  1 },
       { TTI::SK_Reverse, MVT::nxv8i16,  1 },
       { TTI::SK_Reverse, MVT::nxv4i32,  1 },
       { TTI::SK_Reverse, MVT::nxv2i64,  1 },
       { TTI::SK_Reverse, MVT::nxv8f16,  1 },
       { TTI::SK_Reverse, MVT::nxv8bf16, 1 },
       { TTI::SK_Reverse, MVT::nxv4f32,  1 },

llvm/test/Analysis/CostModel/AArch64/getIntrinsicInstrCost-vector-reverse.ll

 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
 ; Check getIntrinsicInstrCost in BasicTTIImpl.h for vector.reverse
 
 ; RUN: opt -cost-model -analyze -mtriple=aarch64--linux-gnu -mattr=+sve  < %s | FileCheck %s
 
 define void @vector_reverse() #0{
 ; CHECK-LABEL: 'vector_reverse'
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 90 for instruction: %1 = call <16 x i8> @llvm.experimental.vector.reverse.v16i8(<16 x i8> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 180 for instruction: %2 = call <32 x i8> @llvm.experimental.vector.reverse.v32i8(<32 x i8> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 42 for instruction: %3 = call <8 x i16> @llvm.experimental.vector.reverse.v8i16(<8 x i16> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 84 for instruction: %4 = call <16 x i16> @llvm.experimental.vector.reverse.v16i16(<16 x i16> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 18 for instruction: %5 = call <4 x i32> @llvm.experimental.vector.reverse.v4i32(<4 x i32> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 36 for instruction: %6 = call <8 x i32> @llvm.experimental.vector.reverse.v8i32(<8 x i32> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %7 = call <2 x i64> @llvm.experimental.vector.reverse.v2i64(<2 x i64> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %8 = call <4 x i64> @llvm.experimental.vector.reverse.v4i64(<4 x i64> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %5 = call <4 x i32> @llvm.experimental.vector.reverse.v4i32(<4 x i32> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %6 = call <8 x i32> @llvm.experimental.vector.reverse.v8i32(<8 x i32> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %7 = call <2 x i64> @llvm.experimental.vector.reverse.v2i64(<2 x i64> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %8 = call <4 x i64> @llvm.experimental.vector.reverse.v4i64(<4 x i64> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 42 for instruction: %9 = call <8 x half> @llvm.experimental.vector.reverse.v8f16(<8 x half> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 84 for instruction: %10 = call <16 x half> @llvm.experimental.vector.reverse.v16f16(<16 x half> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 18 for instruction: %11 = call <4 x float> @llvm.experimental.vector.reverse.v4f32(<4 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 36 for instruction: %12 = call <8 x float> @llvm.experimental.vector.reverse.v8f32(<8 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %13 = call <2 x double> @llvm.experimental.vector.reverse.v2f64(<2 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %14 = call <4 x double> @llvm.experimental.vector.reverse.v4f64(<4 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %11 = call <4 x float> @llvm.experimental.vector.reverse.v4f32(<4 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %12 = call <8 x float> @llvm.experimental.vector.reverse.v8f32(<8 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %13 = call <2 x double> @llvm.experimental.vector.reverse.v2f64(<2 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %14 = call <4 x double> @llvm.experimental.vector.reverse.v4f64(<4 x double> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 42 for instruction: %15 = call <8 x bfloat> @llvm.experimental.vector.reverse.v8bf16(<8 x bfloat> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 84 for instruction: %16 = call <16 x bfloat> @llvm.experimental.vector.reverse.v16bf16(<16 x bfloat> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
 
   call <16 x i8> @llvm.experimental.vector.reverse.v16i8(<16 x i8> undef)
   call <32 x i8> @llvm.experimental.vector.reverse.v32i8(<32 x i8> undef)
   call <8 x i16> @llvm.experimental.vector.reverse.v8i16(<8 x i16> undef)

llvm/test/Analysis/CostModel/AArch64/shuffle-reverse.ll

 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
 ; RUN: opt < %s -mtriple=aarch64--linux-gnu -cost-model -analyze | FileCheck %s
 
 ;
 ; Verify the cost model for reverse shuffles.
 ;
 
 define void @test_vXi32(<2 x i32> %src64, <4 x i32> %src128) {
 ; CHECK-LABEL: 'test_vXi32'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %V64 = shufflevector <2 x i32> %src64, <2 x i32> undef, <2 x i32> <i32 1, i32 0>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 18 for instruction: %V128 = shufflevector <4 x i32> %src128, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V64 = shufflevector <2 x i32> %src64, <2 x i32> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %V128 = shufflevector <4 x i32> %src128, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
   %V64 = shufflevector <2 x i32> %src64, <2 x i32> undef, <2 x i32> <i32 1, i32 0>
   %V128 = shufflevector <4 x i32> %src128, <4 x i32> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
   ret void
 }
 
 define void @test_vXi64(<2 x i64> %src128) {
 ; CHECK-LABEL: 'test_vXi64'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %V128 = shufflevector <2 x i64> %src128, <2 x i64> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V128 = shufflevector <2 x i64> %src128, <2 x i64> undef, <2 x i32> <i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
   %V128 = shufflevector <2 x i64> %src128, <2 x i64> undef, <2 x i32> <i32 1, i32 0>
   ret void
 }
 
 define void @test_vXf32(<2 x float> %src64, <4 x float> %src128) {
 ; CHECK-LABEL: 'test_vXf32'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %V64 = shufflevector <2 x float> %src64, <2 x float> undef, <2 x i32> <i32 1, i32 0>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 18 for instruction: %V128 = shufflevector <4 x float> %src128, <4 x float> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V64 = shufflevector <2 x float> %src64, <2 x float> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %V128 = shufflevector <4 x float> %src128, <4 x float> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
   %V64 = shufflevector <2 x float> %src64, <2 x float> undef, <2 x i32> <i32 1, i32 0>
   %V128 = shufflevector <4 x float> %src128, <4 x float> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
   ret void
 }
 
 define void @test_vXf64(<2 x double> %src128) {
 ; CHECK-LABEL: 'test_vXf64'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %V128 = shufflevector <2 x double> %src128, <2 x double> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V128 = shufflevector <2 x double> %src128, <2 x double> undef, <2 x i32> <i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
   %V128 = shufflevector <2 x double> %src128, <2 x double> undef, <2 x i32> <i32 1, i32 0>
   ret void
 }
 
 ;
 ; Tests the cost model for reverse shuffles of second operand.
 ;
 
 define void @test_upper_vXf32(<2 x float> %a64, <2 x float> %b64, <4 x float> %a128, <4 x float> %b128) {
 ; CHECK-LABEL: 'test_upper_vXf32'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %V64 = shufflevector <2 x float> %a64, <2 x float> %b64, <2 x i32> <i32 3, i32 2>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 18 for instruction: %V128 = shufflevector <4 x float> %a128, <4 x float> %b128, <4 x i32> <i32 7, i32 6, i32 5, i32 4>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V64 = shufflevector <2 x float> %a64, <2 x float> %b64, <2 x i32> <i32 3, i32 2>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %V128 = shufflevector <4 x float> %a128, <4 x float> %b128, <4 x i32> <i32 7, i32 6, i32 5, i32 4>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
   %V64 = shufflevector <2 x float> %a64, <2 x float> %b64, <2 x i32> <i32 3, i32 2>
   %V128 = shufflevector <4 x float> %a128, <4 x float> %b128, <4 x i32> <i32 7, i32 6, i32 5, i32 4>
   ret void
 }

llvm/test/Transforms/LoopVectorize/AArch64/vector-reverse-mask4.ll

 target triple = "aarch64-unknown-linux-gnu"
 
 define void @vector_reverse_mask_v4i1(double* %a, double* %cond, i64 %N) #0 {
 ; CHECK-LABEL: @vector_reverse_mask_v4i1(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[CMP7:%.*]] = icmp sgt i64 [[N:%.*]], 0
 ; CHECK-NEXT:    br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
 ; CHECK:       for.body.preheader:
-; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
+; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 8
 ; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
 ; CHECK:       vector.memcheck:
 ; CHECK-NEXT:    [[SCEVGEP:%.*]] = getelementptr double, double* [[A:%.*]], i64 [[N]]
 ; CHECK-NEXT:    [[SCEVGEP4:%.*]] = getelementptr double, double* [[COND:%.*]], i64 [[N]]
 ; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ugt double* [[SCEVGEP4]], [[A]]
 ; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ugt double* [[SCEVGEP]], [[COND]]
 ; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
 ; CHECK-NEXT:    br i1 [[FOUND_CONFLICT]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
 ; CHECK:       vector.ph:
-; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[N]], -4
-; CHECK-NEXT:    [[IND_END:%.*]] = and i64 [[N]], 3
+; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[N]], -8
+; CHECK-NEXT:    [[IND_END:%.*]] = and i64 [[N]], 7
 ; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
 ; CHECK:       vector.body:
 ; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
 ; CHECK-NEXT:    [[TMP0:%.*]] = xor i64 [[INDEX]], -1
 ; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[TMP0]], [[N]]
-; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds double, double* [[COND]], i64 -3
-; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds double, double* [[TMP2]], i64 [[TMP1]]
+; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds double, double* [[COND]], i64 [[TMP1]]
+; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds double, double* [[TMP2]], i64 -3
 ; CHECK-NEXT:    [[TMP4:%.*]] = bitcast double* [[TMP3]] to <4 x double>*
 ; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x double>, <4 x double>* [[TMP4]], align 8, !alias.scope !0
 ; CHECK-NEXT:    [[REVERSE:%.*]] = shufflevector <4 x double> [[WIDE_LOAD]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
-; CHECK-NEXT:    [[TMP5:%.*]] = fcmp une <4 x double> [[REVERSE]], zeroinitializer
-; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds double, double* [[A]], i64 -3
-; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds double, double* [[TMP6]], i64 [[TMP1]]
-; CHECK-NEXT:    [[REVERSE6:%.*]] = shufflevector <4 x i1> [[TMP5]], <4 x i1> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
-; CHECK-NEXT:    [[TMP8:%.*]] = bitcast double* [[TMP7]] to <4 x double>*
-; CHECK-NEXT:    [[WIDE_MASKED_LOAD:%.*]] = call <4 x double> @llvm.masked.load.v4f64.p0v4f64(<4 x double>* nonnull [[TMP8]], i32 8, <4 x i1> [[REVERSE6]], <4 x double> poison), !alias.scope !3, !noalias !0
-; CHECK-NEXT:    [[TMP9:%.*]] = fadd <4 x double> [[WIDE_MASKED_LOAD]], <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
-; CHECK-NEXT:    [[TMP10:%.*]] = bitcast double* [[TMP7]] to <4 x double>*
-; CHECK-NEXT:    call void @llvm.masked.store.v4f64.p0v4f64(<4 x double> [[TMP9]], <4 x double>* [[TMP10]], i32 8, <4 x i1> [[REVERSE6]]), !alias.scope !3, !noalias !0
-; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 4
-; CHECK-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
-; CHECK-NEXT:    br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
+; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds double, double* [[TMP2]], i64 -4
+; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds double, double* [[TMP5]], i64 -3
+; CHECK-NEXT:    [[TMP7:%.*]] = bitcast double* [[TMP6]] to <4 x double>*
+; CHECK-NEXT:    [[WIDE_LOAD6:%.*]] = load <4 x double>, <4 x double>* [[TMP7]], align 8, !alias.scope !0
+; CHECK-NEXT:    [[REVERSE7:%.*]] = shufflevector <4 x double> [[WIDE_LOAD6]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP8:%.*]] = fcmp une <4 x double> [[REVERSE]], zeroinitializer
+; CHECK-NEXT:    [[TMP9:%.*]] = fcmp une <4 x double> [[REVERSE7]], zeroinitializer
+; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds double, double* [[A]], i64 [[TMP1]]
+; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds double, double* [[TMP10]], i64 -3
+; CHECK-NEXT:    [[REVERSE8:%.*]] = shufflevector <4 x i1> [[TMP8]], <4 x i1> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP12:%.*]] = bitcast double* [[TMP11]] to <4 x double>*
+; CHECK-NEXT:    [[WIDE_MASKED_LOAD:%.*]] = call <4 x double> @llvm.masked.load.v4f64.p0v4f64(<4 x double>* nonnull [[TMP12]], i32 8, <4 x i1> [[REVERSE8]], <4 x double> poison), !alias.scope !3, !noalias !0
+; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds double, double* [[TMP10]], i64 -4
+; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr inbounds double, double* [[TMP13]], i64 -3
+; CHECK-NEXT:    [[REVERSE10:%.*]] = shufflevector <4 x i1> [[TMP9]], <4 x i1> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP15:%.*]] = bitcast double* [[TMP14]] to <4 x double>*
+; CHECK-NEXT:    [[WIDE_MASKED_LOAD11:%.*]] = call <4 x double> @llvm.masked.load.v4f64.p0v4f64(<4 x double>* nonnull [[TMP15]], i32 8, <4 x i1> [[REVERSE10]], <4 x double> poison), !alias.scope !3, !noalias !0
+; CHECK-NEXT:    [[TMP16:%.*]] = fadd <4 x double> [[WIDE_MASKED_LOAD]], <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
+; CHECK-NEXT:    [[TMP17:%.*]] = fadd <4 x double> [[WIDE_MASKED_LOAD11]], <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
+; CHECK-NEXT:    [[TMP18:%.*]] = bitcast double* [[TMP11]] to <4 x double>*
+; CHECK-NEXT:    call void @llvm.masked.store.v4f64.p0v4f64(<4 x double> [[TMP16]], <4 x double>* [[TMP18]], i32 8, <4 x i1> [[REVERSE8]]), !alias.scope !3, !noalias !0
+; CHECK-NEXT:    [[TMP19:%.*]] = bitcast double* [[TMP14]] to <4 x double>*
+; CHECK-NEXT:    call void @llvm.masked.store.v4f64.p0v4f64(<4 x double> [[TMP17]], <4 x double>* [[TMP19]], i32 8, <4 x i1> [[REVERSE10]]), !alias.scope !3, !noalias !0
+; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 8
+; CHECK-NEXT:    [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
+; CHECK-NEXT:    br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
 ; CHECK:       middle.block:
 ; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[N]]
 ; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[SCALAR_PH]]
 ; CHECK:       scalar.ph:
 ; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[N]], [[FOR_BODY_PREHEADER]] ], [ [[N]], [[VECTOR_MEMCHECK]] ]
 ; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
 ; CHECK:       for.cond.cleanup.loopexit:
 ; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
 ; CHECK:       for.cond.cleanup:
 ; CHECK-NEXT:    ret void
 ; CHECK:       for.body:
 ; CHECK-NEXT:    [[I_08_IN:%.*]] = phi i64 [ [[I_08:%.*]], [[FOR_INC:%.*]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
 ; CHECK-NEXT:    [[I_08]] = add nsw i64 [[I_08_IN]], -1
 ; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds double, double* [[COND]], i64 [[I_08]]
-; CHECK-NEXT:    [[TMP12:%.*]] = load double, double* [[ARRAYIDX]], align 8
-; CHECK-NEXT:    [[TOBOOL:%.*]] = fcmp une double [[TMP12]], 0.000000e+00
+; CHECK-NEXT:    [[TMP21:%.*]] = load double, double* [[ARRAYIDX]], align 8
+; CHECK-NEXT:    [[TOBOOL:%.*]] = fcmp une double [[TMP21]], 0.000000e+00
 ; CHECK-NEXT:    br i1 [[TOBOOL]], label [[IF_THEN:%.*]], label [[FOR_INC]]
 ; CHECK:       if.then:
 ; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds double, double* [[A]], i64 [[I_08]]
-; CHECK-NEXT:    [[TMP13:%.*]] = load double, double* [[ARRAYIDX1]], align 8
-; CHECK-NEXT:    [[ADD:%.*]] = fadd double [[TMP13]], 1.000000e+00
+; CHECK-NEXT:    [[TMP22:%.*]] = load double, double* [[ARRAYIDX1]], align 8
+; CHECK-NEXT:    [[ADD:%.*]] = fadd double [[TMP22]], 1.000000e+00
 ; CHECK-NEXT:    store double [[ADD]], double* [[ARRAYIDX1]], align 8
 ; CHECK-NEXT:    br label [[FOR_INC]]
 ; CHECK:       for.inc:
 ; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i64 [[I_08_IN]], 1
 ; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT]], !llvm.loop [[LOOP8:![0-9]+]]
 ;
 
 entry: