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diff --git a/contrib/llvm-project/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h b/contrib/llvm-project/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h
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index 000000000000..1b11b4b631eb
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+++ b/contrib/llvm-project/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h
@@ -0,0 +1,72 @@
+//==- WebAssemblyTargetTransformInfo.h - WebAssembly-specific TTI -*- 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file a TargetTransformInfo::Concept conforming object specific
+/// to the WebAssembly target machine.
+///
+/// It uses the target's detailed information to provide more precise answers to
+/// certain TTI queries, while letting the target independent and default TTI
+/// implementations handle the rest.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
+#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETTRANSFORMINFO_H
+
+#include "WebAssemblyTargetMachine.h"
+#include "llvm/CodeGen/BasicTTIImpl.h"
+#include <algorithm>
+
+namespace llvm {
+
+class WebAssemblyTTIImpl final : public BasicTTIImplBase<WebAssemblyTTIImpl> {
+  typedef BasicTTIImplBase<WebAssemblyTTIImpl> BaseT;
+  typedef TargetTransformInfo TTI;
+  friend BaseT;
+
+  const WebAssemblySubtarget *ST;
+  const WebAssemblyTargetLowering *TLI;
+
+  const WebAssemblySubtarget *getST() const { return ST; }
+  const WebAssemblyTargetLowering *getTLI() const { return TLI; }
+
+public:
+  WebAssemblyTTIImpl(const WebAssemblyTargetMachine *TM, const Function &F)
+      : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
+        TLI(ST->getTargetLowering()) {}
+
+  /// \name Scalar TTI Implementations
+  /// @{
+
+  // TODO: Implement more Scalar TTI for WebAssembly
+
+  TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) const;
+
+  /// @}
+
+  /// \name Vector TTI Implementations
+  /// @{
+
+  unsigned getNumberOfRegisters(bool Vector);
+  unsigned getRegisterBitWidth(bool Vector) const;
+  unsigned getArithmeticInstrCost(
+      unsigned Opcode, Type *Ty,
+      TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
+      TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
+      TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
+      TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
+      ArrayRef<const Value *> Args = ArrayRef<const Value *>());
+  unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
+
+  /// @}
+};
+
+} // end namespace llvm
+
+#endif