diff --git a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
index fe0f308223387..b17cf17db1580 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -3042,7 +3042,7 @@ Instruction *InstCombinerImpl::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
     Value *V = LHS;
     unsigned MaskElems = Mask.size();
     auto *SrcTy = cast<FixedVectorType>(V->getType());
-    unsigned VecBitWidth = SrcTy->getPrimitiveSizeInBits().getFixedValue();
+    unsigned VecBitWidth = DL.getTypeSizeInBits(SrcTy);
     unsigned SrcElemBitWidth = DL.getTypeSizeInBits(SrcTy->getElementType());
     assert(SrcElemBitWidth && "vector elements must have a bitwidth");
     unsigned SrcNumElems = SrcTy->getNumElements();
diff --git a/llvm/test/Transforms/InstCombine/2025-08-06-shufflevector-bitcast-vector-of-pointers.ll b/llvm/test/Transforms/InstCombine/2025-08-06-shufflevector-bitcast-vector-of-pointers.ll
new file mode 100644
index 0000000000000..e778d921d5b4c
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/2025-08-06-shufflevector-bitcast-vector-of-pointers.ll
@@ -0,0 +1,15 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+; Make sure that we don't crash when optimizing shufflevector of <N x ptr> with <1 x i32> mask followed by bitcast of <1 x ptr> to ptr
+
+define ptr @test(<3 x ptr> %vptr) {
+; CHECK-LABEL: define ptr @test(
+; CHECK-SAME: <3 x ptr> [[VPTR:%.*]]) {
+; CHECK-NEXT:    [[SV_EXTRACT:%.*]] = extractelement <3 x ptr> [[VPTR]], i64 0
+; CHECK-NEXT:    ret ptr [[SV_EXTRACT]]
+;
+  %SV = shufflevector <3 x ptr> %vptr, <3 x ptr> zeroinitializer, <1 x i32> zeroinitializer
+  %BC = bitcast <1 x ptr> %SV to ptr
+  ret ptr %BC
+}