diff --git a/mlir/include/mlir/Conversion/Passes.h b/mlir/include/mlir/Conversion/Passes.h
--- a/mlir/include/mlir/Conversion/Passes.h
+++ b/mlir/include/mlir/Conversion/Passes.h
@@ -58,6 +58,7 @@
 #include "mlir/Conversion/TosaToSCF/TosaToSCF.h"
 #include "mlir/Conversion/TosaToTensor/TosaToTensor.h"
 #include "mlir/Conversion/UBToLLVM/UBToLLVM.h"
+#include "mlir/Conversion/UBToSPIRV/UBToSPIRV.h"
 #include "mlir/Conversion/VectorToArmSME/VectorToArmSME.h"
 #include "mlir/Conversion/VectorToGPU/VectorToGPU.h"
 #include "mlir/Conversion/VectorToLLVM/ConvertVectorToLLVM.h"
diff --git a/mlir/include/mlir/Conversion/Passes.td b/mlir/include/mlir/Conversion/Passes.td
--- a/mlir/include/mlir/Conversion/Passes.td
+++ b/mlir/include/mlir/Conversion/Passes.td
@@ -1054,6 +1054,18 @@
   ];
 }
 
+//===----------------------------------------------------------------------===//
+// UBToSPIRV
+//===----------------------------------------------------------------------===//
+
+def UBToSPIRVConversionPass : Pass<"convert-ub-to-spirv"> {
+  let summary = "Convert UB dialect to SPIR-V dialect";
+  let description = [{
+    This pass converts supported UB ops to SPIR-V dialect instructions.
+  }];
+  let dependentDialects = ["spirv::SPIRVDialect"];
+}
+
 //===----------------------------------------------------------------------===//
 // VectorToGPU
 //===----------------------------------------------------------------------===//
diff --git a/mlir/include/mlir/Conversion/UBToSPIRV/UBToSPIRV.h b/mlir/include/mlir/Conversion/UBToSPIRV/UBToSPIRV.h
new file mode 100644
--- /dev/null
+++ b/mlir/include/mlir/Conversion/UBToSPIRV/UBToSPIRV.h
@@ -0,0 +1,29 @@
+//===- UBToSPIRV.h - UB to SPIR-V dialect conversion ------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MLIR_CONVERSION_UBTOSPIRV_UBSPIRV_H
+#define MLIR_CONVERSION_UBTOSPIRV_UBSPIRV_H
+
+#include <memory>
+
+namespace mlir {
+
+class SPIRVTypeConverter;
+class RewritePatternSet;
+class Pass;
+
+#define GEN_PASS_DECL_UBTOSPIRVCONVERSIONPASS
+#include "mlir/Conversion/Passes.h.inc"
+
+namespace ub {
+void populateUBToSPIRVConversionPatterns(SPIRVTypeConverter &converter,
+                                         RewritePatternSet &patterns);
+} // namespace ub
+} // namespace mlir
+
+#endif // MLIR_CONVERSION_UBTOSPIRV_UBSPIRV_H
diff --git a/mlir/lib/Conversion/CMakeLists.txt b/mlir/lib/Conversion/CMakeLists.txt
--- a/mlir/lib/Conversion/CMakeLists.txt
+++ b/mlir/lib/Conversion/CMakeLists.txt
@@ -48,6 +48,7 @@
 add_subdirectory(TosaToSCF)
 add_subdirectory(TosaToTensor)
 add_subdirectory(UBToLLVM)
+add_subdirectory(UBToSPIRV)
 add_subdirectory(VectorToArmSME)
 add_subdirectory(VectorToGPU)
 add_subdirectory(VectorToLLVM)
diff --git a/mlir/lib/Conversion/UBToSPIRV/CMakeLists.txt b/mlir/lib/Conversion/UBToSPIRV/CMakeLists.txt
new file mode 100644
--- /dev/null
+++ b/mlir/lib/Conversion/UBToSPIRV/CMakeLists.txt
@@ -0,0 +1,17 @@
+add_mlir_conversion_library(MLIRUBToSPIRV
+  UBToSPIRV.cpp
+
+  ADDITIONAL_HEADER_DIRS
+  ${MLIR_MAIN_INCLUDE_DIR}/mlir/Conversion/UBToSPIRV
+
+  DEPENDS
+  MLIRConversionPassIncGen
+
+  LINK_COMPONENTS
+  Core
+
+  LINK_LIBS PUBLIC
+  MLIRSPIRVConversion
+  MLIRSPIRVDialect
+  MLIRUBDialect
+  )
diff --git a/mlir/lib/Conversion/UBToSPIRV/UBToSPIRV.cpp b/mlir/lib/Conversion/UBToSPIRV/UBToSPIRV.cpp
new file mode 100644
--- /dev/null
+++ b/mlir/lib/Conversion/UBToSPIRV/UBToSPIRV.cpp
@@ -0,0 +1,91 @@
+//===- UBToSPIRV.cpp - UB to SPIRV-V dialect conversion -------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Conversion/UBToSPIRV/UBToSPIRV.h"
+
+#include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
+#include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
+#include "mlir/Dialect/UB/IR/UBOps.h"
+#include "mlir/Pass/Pass.h"
+
+namespace mlir {
+#define GEN_PASS_DEF_UBTOSPIRVCONVERSIONPASS
+#include "mlir/Conversion/Passes.h.inc"
+} // namespace mlir
+
+using namespace mlir;
+
+namespace {
+
+struct PoisonOpLowering : public OpConversionPattern<ub::PoisonOp> {
+  using OpConversionPattern::OpConversionPattern;
+
+  LogicalResult
+  matchAndRewrite(ub::PoisonOp op, OpAdaptor adaptor,
+                  ConversionPatternRewriter &rewriter) const override;
+};
+
+} // namespace
+
+//===----------------------------------------------------------------------===//
+// PoisonOpLowering
+//===----------------------------------------------------------------------===//
+
+LogicalResult
+PoisonOpLowering::matchAndRewrite(ub::PoisonOp op, OpAdaptor adaptor,
+                                  ConversionPatternRewriter &rewriter) const {
+  Type origType = op.getType();
+  if (!origType.isIntOrIndexOrFloat())
+    return rewriter.notifyMatchFailure(
+        op, [&](Diagnostic &diag) { diag << "unsupported type " << origType; });
+
+  Type resType = getTypeConverter()->convertType(origType);
+  if (!resType)
+    return rewriter.notifyMatchFailure(op, [&](Diagnostic &diag) {
+      diag << "failed to convert result type " << origType;
+    });
+
+  rewriter.replaceOpWithNewOp<spirv::UndefOp>(op, resType);
+  return success();
+}
+
+//===----------------------------------------------------------------------===//
+// Pass Definition
+//===----------------------------------------------------------------------===//
+
+namespace {
+struct UBToSPIRVConversionPass
+    : public impl::UBToSPIRVConversionPassBase<UBToSPIRVConversionPass> {
+  using Base::Base;
+
+  void runOnOperation() override {
+    Operation *op = getOperation();
+    spirv::TargetEnvAttr targetAttr = spirv::lookupTargetEnvOrDefault(op);
+    std::unique_ptr<SPIRVConversionTarget> target =
+        SPIRVConversionTarget::get(targetAttr);
+
+    SPIRVConversionOptions options;
+    SPIRVTypeConverter typeConverter(targetAttr, options);
+
+    RewritePatternSet patterns(&getContext());
+    ub::populateUBToSPIRVConversionPatterns(typeConverter, patterns);
+
+    if (failed(applyPartialConversion(op, *target, std::move(patterns))))
+      signalPassFailure();
+  }
+};
+} // namespace
+
+//===----------------------------------------------------------------------===//
+// Pattern Population
+//===----------------------------------------------------------------------===//
+
+void mlir::ub::populateUBToSPIRVConversionPatterns(
+    SPIRVTypeConverter &converter, RewritePatternSet &patterns) {
+  patterns.add<PoisonOpLowering>(converter, patterns.getContext());
+}
diff --git a/mlir/test/Conversion/UBToSPIRV/ub-to-spirv.mlir b/mlir/test/Conversion/UBToSPIRV/ub-to-spirv.mlir
new file mode 100644
--- /dev/null
+++ b/mlir/test/Conversion/UBToSPIRV/ub-to-spirv.mlir
@@ -0,0 +1,19 @@
+// RUN: mlir-opt -split-input-file -convert-ub-to-spirv -verify-diagnostics %s | FileCheck %s
+
+module attributes {
+  spirv.target_env = #spirv.target_env<
+    #spirv.vce<v1.0, [Int8, Int16, Int64, Float16, Float64, Shader], []>, #spirv.resource_limits<>>
+} {
+
+// CHECK-LABEL: @check_poison
+func.func @check_poison(%lhs: i32, %rhs: i32) {
+// CHECK: {{.*}} = spirv.Undef : i32
+  %0 = ub.poison : index
+// CHECK: {{.*}} = spirv.Undef : i16
+  %1 = ub.poison : i16
+// CHECK: {{.*}} = spirv.Undef : f64
+  %2 = ub.poison : f64
+  return
+}
+
+}