diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -2575,6 +2575,7 @@
           // instructions. If that is the case, the one in Lane 0 will
           // be used.
           if (UseScalar != U ||
+              UseEntry->State == TreeEntry::ScatterVectorize ||
               !InTreeUserNeedToExtract(Scalar, UserInst, TLI)) {
             LLVM_DEBUG(dbgs() << "SLP: \tInternal user will be removed:" << *U
                               << ".\n");
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
--- a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
@@ -243,20 +243,19 @@
 ; CHECK-NEXT:    [[A1:%.*]] = load double, double* [[IDXA1]], align 8
 ; CHECK-NEXT:    [[B2:%.*]] = load double, double* [[IDXB2]], align 8
 ; CHECK-NEXT:    [[TMP3:%.*]] = call <2 x double> @llvm.masked.gather.v2f64.v2p0f64(<2 x double*> [[TMP2]], i32 8, <2 x i1> <i1 true, i1 true>, <2 x double> undef)
-; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <2 x double*> [[TMP2]], i32 0
-; CHECK-NEXT:    [[TMP5:%.*]] = bitcast double* [[IDXB0]] to <2 x double>*
-; CHECK-NEXT:    [[TMP6:%.*]] = load <2 x double>, <2 x double>* [[TMP5]], align 8
-; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0
-; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[A1]], i32 1
-; CHECK-NEXT:    [[TMP9:%.*]] = insertelement <2 x double> poison, double [[D0]], i32 0
-; CHECK-NEXT:    [[TMP10:%.*]] = insertelement <2 x double> [[TMP9]], double [[B2]], i32 1
-; CHECK-NEXT:    [[TMP11:%.*]] = fsub fast <2 x double> [[TMP8]], [[TMP10]]
-; CHECK-NEXT:    [[TMP12:%.*]] = fsub fast <2 x double> [[TMP3]], [[TMP6]]
-; CHECK-NEXT:    [[TMP13:%.*]] = fadd fast <2 x double> [[TMP12]], [[TMP11]]
+; CHECK-NEXT:    [[TMP4:%.*]] = bitcast double* [[IDXB0]] to <2 x double>*
+; CHECK-NEXT:    [[TMP5:%.*]] = load <2 x double>, <2 x double>* [[TMP4]], align 8
+; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0
+; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x double> [[TMP6]], double [[A1]], i32 1
+; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x double> poison, double [[D0]], i32 0
+; CHECK-NEXT:    [[TMP9:%.*]] = insertelement <2 x double> [[TMP8]], double [[B2]], i32 1
+; CHECK-NEXT:    [[TMP10:%.*]] = fsub fast <2 x double> [[TMP7]], [[TMP9]]
+; CHECK-NEXT:    [[TMP11:%.*]] = fsub fast <2 x double> [[TMP3]], [[TMP5]]
+; CHECK-NEXT:    [[TMP12:%.*]] = fadd fast <2 x double> [[TMP11]], [[TMP10]]
 ; CHECK-NEXT:    [[IDXS0:%.*]] = getelementptr inbounds double, double* [[S:%.*]], i64 0
 ; CHECK-NEXT:    [[IDXS1:%.*]] = getelementptr inbounds double, double* [[S]], i64 1
-; CHECK-NEXT:    [[TMP14:%.*]] = bitcast double* [[IDXS0]] to <2 x double>*
-; CHECK-NEXT:    store <2 x double> [[TMP13]], <2 x double>* [[TMP14]], align 8
+; CHECK-NEXT:    [[TMP13:%.*]] = bitcast double* [[IDXS0]] to <2 x double>*
+; CHECK-NEXT:    store <2 x double> [[TMP12]], <2 x double>* [[TMP13]], align 8
 ; CHECK-NEXT:    store double [[A1]], double* [[EXT1:%.*]], align 8
 ; CHECK-NEXT:    ret void
 ;
@@ -320,34 +319,36 @@
 ; CHECK-LABEL: @lookahead_limit_users_budget(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[IDXA0:%.*]] = getelementptr inbounds double, double* [[A:%.*]], i64 0
-; CHECK-NEXT:    [[IDXB0:%.*]] = getelementptr inbounds double, double* [[B:%.*]], i64 0
 ; CHECK-NEXT:    [[IDXC0:%.*]] = getelementptr inbounds double, double* [[C:%.*]], i64 0
 ; CHECK-NEXT:    [[IDXD0:%.*]] = getelementptr inbounds double, double* [[D:%.*]], i64 0
 ; CHECK-NEXT:    [[IDXA1:%.*]] = getelementptr inbounds double, double* [[A]], i64 1
-; CHECK-NEXT:    [[IDXB2:%.*]] = getelementptr inbounds double, double* [[B]], i64 2
+; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <2 x double*> poison, double* [[B:%.*]], i32 0
+; CHECK-NEXT:    [[TMP1:%.*]] = insertelement <2 x double*> [[TMP0]], double* [[B]], i32 1
+; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr double, <2 x double*> [[TMP1]], <2 x i64> <i64 0, i64 2>
 ; CHECK-NEXT:    [[IDXA2:%.*]] = getelementptr inbounds double, double* [[A]], i64 2
 ; CHECK-NEXT:    [[IDXB1:%.*]] = getelementptr inbounds double, double* [[B]], i64 1
-; CHECK-NEXT:    [[A0:%.*]] = load double, double* [[IDXA0]], align 8
-; CHECK-NEXT:    [[B0:%.*]] = load double, double* [[IDXB0]], align 8
 ; CHECK-NEXT:    [[C0:%.*]] = load double, double* [[IDXC0]], align 8
 ; CHECK-NEXT:    [[D0:%.*]] = load double, double* [[IDXD0]], align 8
-; CHECK-NEXT:    [[A1:%.*]] = load double, double* [[IDXA1]], align 8
-; CHECK-NEXT:    [[B2:%.*]] = load double, double* [[IDXB2]], align 8
+; CHECK-NEXT:    [[TMP3:%.*]] = bitcast double* [[IDXA0]] to <2 x double>*
+; CHECK-NEXT:    [[TMP4:%.*]] = load <2 x double>, <2 x double>* [[TMP3]], align 8
+; CHECK-NEXT:    [[TMP5:%.*]] = call <2 x double> @llvm.masked.gather.v2f64.v2p0f64(<2 x double*> [[TMP2]], i32 8, <2 x i1> <i1 true, i1 true>, <2 x double> undef)
 ; CHECK-NEXT:    [[A2:%.*]] = load double, double* [[IDXA2]], align 8
 ; CHECK-NEXT:    [[B1:%.*]] = load double, double* [[IDXB1]], align 8
-; CHECK-NEXT:    [[SUBA0B0:%.*]] = fsub fast double [[A0]], [[B0]]
-; CHECK-NEXT:    [[SUBC0D0:%.*]] = fsub fast double [[C0]], [[D0]]
-; CHECK-NEXT:    [[SUBA1B2:%.*]] = fsub fast double [[A1]], [[B2]]
-; CHECK-NEXT:    [[SUBA2B1:%.*]] = fsub fast double [[A2]], [[B1]]
-; CHECK-NEXT:    [[ADD0:%.*]] = fadd fast double [[SUBA0B0]], [[SUBC0D0]]
-; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast double [[SUBA1B2]], [[SUBA2B1]]
+; CHECK-NEXT:    [[TMP6:%.*]] = fsub fast <2 x double> [[TMP4]], [[TMP5]]
+; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0
+; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[A2]], i32 1
+; CHECK-NEXT:    [[TMP9:%.*]] = insertelement <2 x double> poison, double [[D0]], i32 0
+; CHECK-NEXT:    [[TMP10:%.*]] = insertelement <2 x double> [[TMP9]], double [[B1]], i32 1
+; CHECK-NEXT:    [[TMP11:%.*]] = fsub fast <2 x double> [[TMP8]], [[TMP10]]
+; CHECK-NEXT:    [[TMP12:%.*]] = fadd fast <2 x double> [[TMP6]], [[TMP11]]
 ; CHECK-NEXT:    [[IDXS0:%.*]] = getelementptr inbounds double, double* [[S:%.*]], i64 0
 ; CHECK-NEXT:    [[IDXS1:%.*]] = getelementptr inbounds double, double* [[S]], i64 1
-; CHECK-NEXT:    store double [[ADD0]], double* [[IDXS0]], align 8
-; CHECK-NEXT:    store double [[ADD1]], double* [[IDXS1]], align 8
-; CHECK-NEXT:    store double [[A1]], double* [[EXT1:%.*]], align 8
-; CHECK-NEXT:    store double [[A1]], double* [[EXT2:%.*]], align 8
-; CHECK-NEXT:    store double [[A1]], double* [[EXT3:%.*]], align 8
+; CHECK-NEXT:    [[TMP13:%.*]] = bitcast double* [[IDXS0]] to <2 x double>*
+; CHECK-NEXT:    store <2 x double> [[TMP12]], <2 x double>* [[TMP13]], align 8
+; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <2 x double> [[TMP4]], i32 1
+; CHECK-NEXT:    store double [[TMP14]], double* [[EXT1:%.*]], align 8
+; CHECK-NEXT:    store double [[TMP14]], double* [[EXT2:%.*]], align 8
+; CHECK-NEXT:    store double [[TMP14]], double* [[EXT3:%.*]], align 8
 ; CHECK-NEXT:    store double [[B1]], double* [[EXT4:%.*]], align 8
 ; CHECK-NEXT:    store double [[B1]], double* [[EXT5:%.*]], align 8
 ; CHECK-NEXT:    ret void