diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1122,6 +1122,10 @@
     setOperationAction(ISD::STORE,              MVT::v4i16, Custom);
     setOperationAction(ISD::STORE,              MVT::v8i8,  Custom);
 
+    // Add 32-bit vector stores to help vectorization opportunities.
+    setOperationAction(ISD::STORE,              MVT::v2i16, Custom);
+    setOperationAction(ISD::STORE,              MVT::v4i8,  Custom);
+
     setOperationAction(ISD::BITCAST,            MVT::v2i32, Custom);
     setOperationAction(ISD::BITCAST,            MVT::v4i16, Custom);
     setOperationAction(ISD::BITCAST,            MVT::v8i8,  Custom);
@@ -25520,6 +25524,9 @@
     return SDValue();
   }
 
+  if (StoreVT.is32BitVector())
+    return SDValue();
+
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
   assert(StoreVT.is64BitVector() && "Unexpected VT");
   assert(TLI.getTypeAction(*DAG.getContext(), StoreVT) ==
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/arith-add-load.ll b/llvm/test/Transforms/SLPVectorizer/X86/arith-add-load.ll
--- a/llvm/test/Transforms/SLPVectorizer/X86/arith-add-load.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/arith-add-load.ll
@@ -14,28 +14,10 @@
 define void @add4(ptr noalias nocapture noundef %r, ptr noalias nocapture noundef readonly %a) {
 ; CHECK-LABEL: @add4(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr [[A:%.*]], align 1
-; CHECK-NEXT:    [[TMP1:%.*]] = load i8, ptr [[R:%.*]], align 1
-; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[TMP1]], [[TMP0]]
-; CHECK-NEXT:    store i8 [[ADD]], ptr [[R]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 1
-; CHECK-NEXT:    [[TMP2:%.*]] = load i8, ptr [[ARRAYIDX_1]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_1:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 1
-; CHECK-NEXT:    [[TMP3:%.*]] = load i8, ptr [[ARRAYIDX2_1]], align 1
-; CHECK-NEXT:    [[ADD_1:%.*]] = add i8 [[TMP3]], [[TMP2]]
-; CHECK-NEXT:    store i8 [[ADD_1]], ptr [[ARRAYIDX2_1]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_2:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 2
-; CHECK-NEXT:    [[TMP4:%.*]] = load i8, ptr [[ARRAYIDX_2]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_2:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 2
-; CHECK-NEXT:    [[TMP5:%.*]] = load i8, ptr [[ARRAYIDX2_2]], align 1
-; CHECK-NEXT:    [[ADD_2:%.*]] = add i8 [[TMP5]], [[TMP4]]
-; CHECK-NEXT:    store i8 [[ADD_2]], ptr [[ARRAYIDX2_2]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_3:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 3
-; CHECK-NEXT:    [[TMP6:%.*]] = load i8, ptr [[ARRAYIDX_3]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_3:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 3
-; CHECK-NEXT:    [[TMP7:%.*]] = load i8, ptr [[ARRAYIDX2_3]], align 1
-; CHECK-NEXT:    [[ADD_3:%.*]] = add i8 [[TMP7]], [[TMP6]]
-; CHECK-NEXT:    store i8 [[ADD_3]], ptr [[ARRAYIDX2_3]], align 1
+; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x i8>, ptr [[A:%.*]], align 1
+; CHECK-NEXT:    [[TMP1:%.*]] = load <4 x i8>, ptr [[R:%.*]], align 1
+; CHECK-NEXT:    [[TMP2:%.*]] = add <4 x i8> [[TMP1]], [[TMP0]]
+; CHECK-NEXT:    store <4 x i8> [[TMP2]], ptr [[R]], align 1
 ; CHECK-NEXT:    ret void
 ;
 entry:
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/arith-and-const-load.ll b/llvm/test/Transforms/SLPVectorizer/X86/arith-and-const-load.ll
--- a/llvm/test/Transforms/SLPVectorizer/X86/arith-and-const-load.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/arith-and-const-load.ll
@@ -14,24 +14,9 @@
 define void @and4(ptr noalias nocapture noundef writeonly %dst, ptr noalias nocapture noundef readonly %src) {
 ; CHECK-LABEL: @and4(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr [[SRC:%.*]], align 1
-; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[TMP0]], -64
-; CHECK-NEXT:    store i8 [[TMP1]], ptr [[DST:%.*]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds i8, ptr [[SRC]], i64 1
-; CHECK-NEXT:    [[TMP2:%.*]] = load i8, ptr [[ARRAYIDX_1]], align 1
-; CHECK-NEXT:    [[TMP3:%.*]] = and i8 [[TMP2]], -64
-; CHECK-NEXT:    [[ARRAYIDX3_1:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 1
-; CHECK-NEXT:    store i8 [[TMP3]], ptr [[ARRAYIDX3_1]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_2:%.*]] = getelementptr inbounds i8, ptr [[SRC]], i64 2
-; CHECK-NEXT:    [[TMP4:%.*]] = load i8, ptr [[ARRAYIDX_2]], align 1
-; CHECK-NEXT:    [[TMP5:%.*]] = and i8 [[TMP4]], -64
-; CHECK-NEXT:    [[ARRAYIDX3_2:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 2
-; CHECK-NEXT:    store i8 [[TMP5]], ptr [[ARRAYIDX3_2]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_3:%.*]] = getelementptr inbounds i8, ptr [[SRC]], i64 3
-; CHECK-NEXT:    [[TMP6:%.*]] = load i8, ptr [[ARRAYIDX_3]], align 1
-; CHECK-NEXT:    [[TMP7:%.*]] = and i8 [[TMP6]], -64
-; CHECK-NEXT:    [[ARRAYIDX3_3:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 3
-; CHECK-NEXT:    store i8 [[TMP7]], ptr [[ARRAYIDX3_3]], align 1
+; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x i8>, ptr [[SRC:%.*]], align 1
+; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i8> [[TMP0]], <i8 -64, i8 -64, i8 -64, i8 -64>
+; CHECK-NEXT:    store <4 x i8> [[TMP1]], ptr [[DST:%.*]], align 1
 ; CHECK-NEXT:    ret void
 ;
 entry:
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/arith-mul-load.ll b/llvm/test/Transforms/SLPVectorizer/X86/arith-mul-load.ll
--- a/llvm/test/Transforms/SLPVectorizer/X86/arith-mul-load.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/arith-mul-load.ll
@@ -14,28 +14,10 @@
 define void @add4(ptr noalias nocapture noundef %r, ptr noalias nocapture noundef readonly %a) {
 ; CHECK-LABEL: @add4(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr [[A:%.*]], align 1
-; CHECK-NEXT:    [[TMP1:%.*]] = load i8, ptr [[R:%.*]], align 1
-; CHECK-NEXT:    [[MUL:%.*]] = mul i8 [[TMP1]], [[TMP0]]
-; CHECK-NEXT:    store i8 [[MUL]], ptr [[R]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 1
-; CHECK-NEXT:    [[TMP2:%.*]] = load i8, ptr [[ARRAYIDX_1]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_1:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 1
-; CHECK-NEXT:    [[TMP3:%.*]] = load i8, ptr [[ARRAYIDX2_1]], align 1
-; CHECK-NEXT:    [[MUL_1:%.*]] = mul i8 [[TMP3]], [[TMP2]]
-; CHECK-NEXT:    store i8 [[MUL_1]], ptr [[ARRAYIDX2_1]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_2:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 2
-; CHECK-NEXT:    [[TMP4:%.*]] = load i8, ptr [[ARRAYIDX_2]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_2:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 2
-; CHECK-NEXT:    [[TMP5:%.*]] = load i8, ptr [[ARRAYIDX2_2]], align 1
-; CHECK-NEXT:    [[MUL_2:%.*]] = mul i8 [[TMP5]], [[TMP4]]
-; CHECK-NEXT:    store i8 [[MUL_2]], ptr [[ARRAYIDX2_2]], align 1
-; CHECK-NEXT:    [[ARRAYIDX_3:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 3
-; CHECK-NEXT:    [[TMP6:%.*]] = load i8, ptr [[ARRAYIDX_3]], align 1
-; CHECK-NEXT:    [[ARRAYIDX2_3:%.*]] = getelementptr inbounds i8, ptr [[R]], i64 3
-; CHECK-NEXT:    [[TMP7:%.*]] = load i8, ptr [[ARRAYIDX2_3]], align 1
-; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[TMP7]], [[TMP6]]
-; CHECK-NEXT:    store i8 [[MUL_3]], ptr [[ARRAYIDX2_3]], align 1
+; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x i8>, ptr [[A:%.*]], align 1
+; CHECK-NEXT:    [[TMP1:%.*]] = load <4 x i8>, ptr [[R:%.*]], align 1
+; CHECK-NEXT:    [[TMP2:%.*]] = mul <4 x i8> [[TMP1]], [[TMP0]]
+; CHECK-NEXT:    store <4 x i8> [[TMP2]], ptr [[R]], align 1
 ; CHECK-NEXT:    ret void
 ;
 entry: