Index: clang-tidy/bugprone/BugproneTidyModule.cpp
===================================================================
--- clang-tidy/bugprone/BugproneTidyModule.cpp
+++ clang-tidy/bugprone/BugproneTidyModule.cpp
@@ -30,6 +30,7 @@
 #include "MoveForwardingReferenceCheck.h"
 #include "MultipleStatementMacroCheck.h"
 #include "ParentVirtualCallCheck.h"
+#include "PlacementNewTargetTypeMismatch.h"
 #include "SizeofContainerCheck.h"
 #include "SizeofExpressionCheck.h"
 #include "StringConstructorCheck.h"
@@ -102,6 +103,8 @@
         "bugprone-narrowing-conversions");
     CheckFactories.registerCheck<ParentVirtualCallCheck>(
         "bugprone-parent-virtual-call");
+    CheckFactories.registerCheck<PlacementNewTargetTypeMismatch>(
+        "bugprone-placement-new-target-type-mismatch");
     CheckFactories.registerCheck<SizeofContainerCheck>(
         "bugprone-sizeof-container");
     CheckFactories.registerCheck<SizeofExpressionCheck>(
Index: clang-tidy/bugprone/CMakeLists.txt
===================================================================
--- clang-tidy/bugprone/CMakeLists.txt
+++ clang-tidy/bugprone/CMakeLists.txt
@@ -22,6 +22,7 @@
   MoveForwardingReferenceCheck.cpp
   MultipleStatementMacroCheck.cpp
   ParentVirtualCallCheck.cpp
+  PlacementNewTargetTypeMismatch.cpp
   SizeofContainerCheck.cpp
   SizeofExpressionCheck.cpp
   StringConstructorCheck.cpp
Index: clang-tidy/bugprone/PlacementNewTargetTypeMismatch.h
===================================================================
--- /dev/null
+++ clang-tidy/bugprone/PlacementNewTargetTypeMismatch.h
@@ -0,0 +1,35 @@
+//===--- PlacementNewTargetTypeMismatch.h - clang-tidy ----------*- 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 LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_PLACEMENTNEWTARGETTYPEMISMATCHCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_PLACEMENTNEWTARGETTYPEMISMATCHCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang {
+namespace tidy {
+namespace bugprone {
+
+/// Finds placement-new calls where the pointer type of the adress mismatches
+/// the type of the created value.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-placement-new-target-type-mismatch.html
+class PlacementNewTargetTypeMismatch : public ClangTidyCheck {
+public:
+  PlacementNewTargetTypeMismatch(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+};
+
+} // namespace bugprone
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_PLACEMENTNEWTARGETTYPEMISMATCHCHECK_H
Index: clang-tidy/bugprone/PlacementNewTargetTypeMismatch.cpp
===================================================================
--- /dev/null
+++ clang-tidy/bugprone/PlacementNewTargetTypeMismatch.cpp
@@ -0,0 +1,69 @@
+//===--- PlacementNewTargetTypeMismatch.cpp - clang-tidy ------------------===//
+//
+// 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 "PlacementNewTargetTypeMismatch.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang {
+namespace tidy {
+namespace bugprone {
+namespace {
+AST_MATCHER(Expr, isPlacementNewExpr) {
+  const auto *NewExpr = dyn_cast<CXXNewExpr>(&Node);
+  return NewExpr && NewExpr->getNumPlacementArgs() != 0;
+}
+} // namespace
+
+void PlacementNewTargetTypeMismatch::registerMatchers(MatchFinder *Finder) {
+  // We only want the records that call 'new' with an adress parameter.
+  Finder->addMatcher(
+      expr(isPlacementNewExpr(), unless(hasDescendant(unresolvedLookupExpr())))
+          .bind("NewExpr"),
+      this);
+}
+
+void PlacementNewTargetTypeMismatch::check(
+    const MatchFinder::MatchResult &Result) {
+  const auto *NewExpr = Result.Nodes.getNodeAs<CXXNewExpr>("NewExpr");
+  assert(NewExpr && "Matched node bound by 'NewExpr' shoud be a 'CXXNewExpr'");
+  assert(NewExpr->getNumPlacementArgs() != 0 && "");
+
+  // Fetch the cast from the Expr of the placement argument, if it exists.
+  const Expr *PlacementExpr = NewExpr->getPlacementArg(0);
+  assert(PlacementExpr != nullptr && "PlacementExpr should not be null");
+  const CastExpr *Cast = dyn_cast<CastExpr>(PlacementExpr);
+  if (Cast == nullptr)
+    return;
+
+  QualType SubExprType = Cast->getSubExprAsWritten()->getType();
+
+  if ((!SubExprType->isPointerType() && !SubExprType->isArrayType()) ||
+      SubExprType->isVoidPointerType())
+    return;
+
+  QualType PlacementParameterType =
+      SubExprType->getPointeeOrArrayElementType()->getCanonicalTypeInternal();
+  QualType AllocatedType = NewExpr->getAllocatedType().getCanonicalType();
+
+  if (AllocatedType->isIncompleteType() ||
+      PlacementParameterType->isIncompleteType())
+    return;
+
+  if (PlacementParameterType != AllocatedType) {
+    diag(PlacementExpr->getExprLoc(),
+         "placement new parameter and allocated type mismatch");
+  }
+}
+
+} // namespace bugprone
+} // namespace tidy
+} // namespace clang
Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -130,6 +130,12 @@
   <clang-tidy/checks/modernize-use-override>` now supports `OverrideSpelling`
   and `FinalSpelling` options.
 
+- New :doc:`bugprone-placement-new-target-type-mismatch
+  <clang-tidy/checks/bugprone-placement-new-target-type-mismatch>` check.
+
+  Finds placement-new calls where the pointer type of the adress mismatches the
+  type of the created value.
+
 - New :doc:`openmp-exception-escape
   <clang-tidy/checks/openmp-exception-escape>` check.
 
Index: docs/clang-tidy/checks/bugprone-placement-new-target-type-mismatch.rst
===================================================================
--- /dev/null
+++ docs/clang-tidy/checks/bugprone-placement-new-target-type-mismatch.rst
@@ -0,0 +1,23 @@
+.. title:: clang-tidy - misc-placement-new-target-type-mismatch
+
+misc-placement-new-target-type-mismatch
+=======================================
+
+Finds placement-new calls where the pointer type of the adress mismatches the
+type of the created value.
+
+Example:
+
+.. code-block:: c++
+
+  void ok() {
+    Foo * ptr = new Foo;
+    new (ptr) Foo;
+    ...
+  }
+
+  void not_ok() {
+    int * ptr = new int;
+    new (ptr) Foo;
+    ...
+  }
Index: docs/clang-tidy/checks/list.rst
===================================================================
--- docs/clang-tidy/checks/list.rst
+++ docs/clang-tidy/checks/list.rst
@@ -55,6 +55,7 @@
    bugprone-move-forwarding-reference
    bugprone-multiple-statement-macro
    bugprone-parent-virtual-call
+   bugprone-placement-new-target-type-mismatch
    bugprone-sizeof-container
    bugprone-sizeof-expression
    bugprone-string-constructor
Index: test/clang-tidy/bugprone-placement-new-target-type-mismatch.cpp
===================================================================
--- /dev/null
+++ test/clang-tidy/bugprone-placement-new-target-type-mismatch.cpp
@@ -0,0 +1,118 @@
+// RUN: %check_clang_tidy %s bugprone-placement-new-target-type-mismatch %t
+
+// definitions
+	
+namespace std {
+struct nothrow_t { explicit nothrow_t() = default; } nothrow;
+template<class T> T* addressof(T& arg) noexcept;
+template< class T > struct remove_reference      {typedef T type;};
+template< class T > struct remove_reference<T&>  {typedef T type;};
+template< class T > struct remove_reference<T&&> {typedef T type;};
+template< class T >
+T&& forward( typename std::remove_reference<T>::type& t ) noexcept;
+} // namespace std
+
+using size_type = unsigned long;
+void *operator new(size_type, void *);
+void *operator new[](size_type, void *);
+void* operator new(size_type size, const std::nothrow_t&) noexcept;
+void* operator new(size_type size, const std::nothrow_t&) noexcept;
+void* operator new[](size_type size, const std::nothrow_t&) noexcept;
+
+struct Foo {
+  int a;
+  int b;
+  int c;
+  int d;
+};
+
+template<typename T>
+T& getT() {
+  static T f;
+  return f;
+}
+
+// instances emitting warnings
+
+void f1() {
+  struct Dummy {
+    int a;
+    int b;
+  };
+  int *ptr = new int;
+  new (ptr) Dummy;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+void f2() {
+  int * ptr = new int;
+  new (ptr) Foo;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+void f3() {
+  char *ptr = new char[17*sizeof(char)];
+  new (ptr) float[13];
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+void f4() {
+  new (std::addressof(getT<int>())) Foo;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+void f5() {
+  char *ptr = new char[17*sizeof(char)];
+  new (ptr) float{13.f};
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+void f6() {
+  char array[17*sizeof(char)];
+  new (array) float{13.f};
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: placement new parameter and allocated type mismatch [bugprone-placement-new-target-type-mismatch]
+}
+
+// instances not emitting a warning
+
+void g1() {
+  Foo * ptr = new Foo;
+  new (ptr) Foo;
+}
+
+void g2() {
+  char *ptr = new char[17*sizeof(char)];
+  new ((float *)ptr) float{13.f};
+}
+
+void g3() {
+  char array[17*sizeof(char)];
+  new (array) char('A');
+}
+
+void g4() {
+  new ((void *)std::addressof(getT<Foo>())) Foo;
+}
+
+union
+{
+  char * buffer;
+} Union;
+
+template <typename T, typename... U>
+void g5(U &&... V) {
+  new (static_cast<T *>(Union.buffer)) T(std::forward<U>(V)...);
+}
+
+template <typename T, typename... U>
+void g6(U &&... V) {
+  new (std::nothrow) T(std::forward<U>(V)...);
+}
+
+template <typename T, typename... U> void g7(U &&... Us) {
+  new (static_cast<T *>(Union.buffer)) T(std::forward<U>(Us)...);
+}
+
+template <typename T, typename... U> void g8(U &&... Us) {
+  new (Union.buffer) T(std::forward<U>(Us)...);
+}