diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 2cc42964da285..3ba0336db365f 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -8791,6 +8791,10 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
       } else if (It != MinBWs.end()) {
         assert(BWSz > SrcBWSz && "Invalid cast!");
         VecOpcode = It->second.second ? Instruction::SExt : Instruction::ZExt;
+      } else if (SrcIt != MinBWs.end()) {
+        assert(BWSz > SrcBWSz && "Invalid cast!");
+        VecOpcode =
+            SrcIt->second.second ? Instruction::SExt : Instruction::ZExt;
       }
     }
     auto GetScalarCost = [&](unsigned Idx) -> InstructionCost {
@@ -12142,6 +12146,9 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E, bool PostponedPHIs) {
           VecOpcode = Instruction::BitCast;
         } else if (BWSz < SrcBWSz) {
           VecOpcode = Instruction::Trunc;
+        } else if (It != MinBWs.end()) {
+          assert(BWSz > SrcBWSz && "Invalid cast!");
+          VecOpcode = It->second.second ? Instruction::SExt : Instruction::ZExt;
         } else if (SrcIt != MinBWs.end()) {
           assert(BWSz > SrcBWSz && "Invalid cast!");
           VecOpcode =
diff --git a/llvm/test/Transforms/SLPVectorizer/SystemZ/ext-not-resized-op-resized.ll b/llvm/test/Transforms/SLPVectorizer/SystemZ/ext-not-resized-op-resized.ll
new file mode 100644
index 0000000000000..a7bb272b44dc4
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/SystemZ/ext-not-resized-op-resized.ll
@@ -0,0 +1,48 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -S --passes=slp-vectorizer -mtriple=systemz-unknown -mcpu=z13 < %s | FileCheck %s
+
+define void @test(i64 %0, i1 %.cmp.i.2, i1 %1, ptr %a) {
+; CHECK-LABEL: define void @test(
+; CHECK-SAME: i64 [[TMP0:%.*]], i1 [[DOTCMP_I_2:%.*]], i1 [[TMP1:%.*]], ptr [[A:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <4 x i64> poison, i64 [[TMP0]], i32 0
+; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x i64> [[TMP3]], <4 x i64> poison, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP5:%.*]] = lshr <4 x i64> [[TMP4]], <i64 63, i64 63, i64 63, i64 63>
+; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <4 x i1> poison, i1 [[DOTCMP_I_2]], i32 0
+; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <4 x i1> [[TMP6]], i1 [[TMP1]], i32 1
+; CHECK-NEXT:    [[TMP8:%.*]] = shufflevector <4 x i1> [[TMP7]], <4 x i1> poison, <4 x i32> <i32 0, i32 0, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP9:%.*]] = shufflevector <4 x i1> [[TMP7]], <4 x i1> poison, <4 x i32> <i32 1, i32 1, i32 0, i32 1>
+; CHECK-NEXT:    [[TMP10:%.*]] = trunc <4 x i64> [[TMP5]] to <4 x i1>
+; CHECK-NEXT:    [[TMP11:%.*]] = select <4 x i1> [[TMP9]], <4 x i1> [[TMP10]], <4 x i1> [[TMP8]]
+; CHECK-NEXT:    [[TMP12:%.*]] = zext <4 x i1> [[TMP11]] to <4 x i32>
+; CHECK-NEXT:    [[TMP13:%.*]] = xor <4 x i32> [[TMP12]], <i32 1, i32 1, i32 1, i32 1>
+; CHECK-NEXT:    [[TMP14:%.*]] = call i32 @llvm.vector.reduce.or.v4i32(<4 x i32> [[TMP13]])
+; CHECK-NEXT:    store i32 [[TMP14]], ptr [[A]], align 4
+; CHECK-NEXT:    ret void
+;
+  %.lobit.i.2 = lshr i64 %0, 63
+  %3 = zext i1 %.cmp.i.2 to i64
+  %4 = select i1 %1, i64 %.lobit.i.2, i64 %3
+  %5 = trunc i64 %4 to i32
+  %6 = xor i32 %5, 1
+  %.lobit.i.3 = lshr i64 %0, 63
+  %7 = zext i1 %.cmp.i.2 to i64
+  %8 = select i1 %1, i64 %.lobit.i.3, i64 %7
+  %9 = trunc i64 %8 to i32
+  %10 = xor i32 %9, 1
+  %11 = or i32 %10, %6
+  %.lobit.i.4 = lshr i64 %0, 63
+  %12 = zext i1 %1 to i64
+  %13 = select i1 %.cmp.i.2, i64 %.lobit.i.4, i64 %12
+  %14 = trunc i64 %13 to i32
+  %15 = xor i32 %14, 1
+  %16 = or i32 %15, %11
+  %.lobit.i.5 = lshr i64 %0, 63
+  %17 = zext i1 %.cmp.i.2 to i64
+  %18 = select i1 %1, i64 %.lobit.i.5, i64 %17
+  %19 = trunc i64 %18 to i32
+  %20 = xor i32 %19, 1
+  %21 = or i32 %20, %16
+  store i32 %21, ptr %a, align 4
+  ret void
+}
+