[CIR] Add array new cookie support

clang/lib/CIR/CodeGen/CIRGenCXXABI.cpp

@@ -81,8 +81,7 @@ CharUnits CIRGenCXXABI::getArrayCookieSize(const CXXNewExpr *e) {
   if (!requiresArrayCookie(e))
     return CharUnits::Zero();
 
-  cgm.errorNYI(e->getSourceRange(), "CIRGenCXXABI::getArrayCookieSize");
-  return CharUnits::Zero();
+  return getArrayCookieSizeImpl(e->getAllocatedType());
 }
 
 bool CIRGenCXXABI::requiresArrayCookie(const CXXNewExpr *e) {

clang/lib/CIR/CodeGen/CIRGenCXXABI.h

@@ -290,8 +290,28 @@ class CIRGenCXXABI {
   ///   - non-array allocations never need a cookie
   ///   - calls to \::operator new(size_t, void*) never need a cookie
   ///
-  /// \param E - the new-expression being allocated.
+  /// \param e - the new-expression being allocated.
   virtual CharUnits getArrayCookieSize(const CXXNewExpr *e);
+
+  /// Initialize the array cookie for the given allocation.
+  ///
+  /// \param newPtr - a char* which is the presumed-non-null
+  ///   return value of the allocation function
+  /// \param numElements - the computed number of elements,
+  ///   potentially collapsed from the multidimensional array case;
+  ///   always a size_t
+  /// \param elementType - the base element allocated type,
+  ///   i.e. the allocated type after stripping all array types
+  virtual Address initializeArrayCookie(CIRGenFunction &cgf, Address newPtr,
+                                        mlir::Value numElements,
+                                        const CXXNewExpr *e,
+                                        QualType elementType) = 0;
+
+protected:
+  /// Returns the extra size required in order to store the array
+  /// cookie for the given type.  Assumes that an array cookie is
+  /// required.
+  virtual CharUnits getArrayCookieSizeImpl(QualType elementType) = 0;
 };
 
 /// Creates and Itanium-family ABI

clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp

@@ -283,6 +283,7 @@ static mlir::Value emitCXXNewAllocSize(CIRGenFunction &cgf, const CXXNewExpr *e,
         mlir::cast<cir::IntAttr>(constNumElements).getValue();
 
     unsigned numElementsWidth = count.getBitWidth();
+    bool hasAnyOverflow = false;
 
     // The equivalent code in CodeGen/CGExprCXX.cpp handles these cases as
     // overflow, but that should never happen. The size argument is implicitly
@@ -313,11 +314,22 @@ static mlir::Value emitCXXNewAllocSize(CIRGenFunction &cgf, const CXXNewExpr *e,
 
     // Add in the cookie, and check whether it's overflowed.
     if (cookieSize != 0) {
-      cgf.cgm.errorNYI(e->getSourceRange(),
-                       "emitCXXNewAllocSize: array cookie");
+      // Save the current size without a cookie.  This shouldn't be
+      // used if there was overflow
+      sizeWithoutCookie = cgf.getBuilder().getConstInt(
+          loc, allocationSize.zextOrTrunc(sizeWidth));
+
+      allocationSize = allocationSize.uadd_ov(cookieSize, overflow);
+      hasAnyOverflow |= overflow;
     }
 
-    size = cgf.getBuilder().getConstInt(loc, allocationSize);
+    // On overflow, produce a -1 so operator new will fail
+    if (hasAnyOverflow) {
+      size =
+          cgf.getBuilder().getConstInt(loc, llvm::APInt::getAllOnes(sizeWidth));
+    } else {
+      size = cgf.getBuilder().getConstInt(loc, allocationSize);
+    }
   } else {
     // TODO: Handle the variable size case
     cgf.cgm.errorNYI(e->getSourceRange(),
@@ -367,7 +379,50 @@ void CIRGenFunction::emitNewArrayInitializer(
   if (!e->hasInitializer())
     return;
 
-  cgm.errorNYI(e->getSourceRange(), "emitNewArrayInitializer");
+  unsigned initListElements = 0;
+
+  const Expr *init = e->getInitializer();
+  const InitListExpr *ile = dyn_cast<InitListExpr>(init);
+  if (ile) {
+    cgm.errorNYI(ile->getSourceRange(), "emitNewArrayInitializer: init list");
+    return;
+  }
+
+  // If all elements have already been initialized, skip any further
+  // initialization.
+  auto constOp = dyn_cast<cir::ConstantOp>(numElements.getDefiningOp());
+  if (constOp) {
+    auto constIntAttr = mlir::dyn_cast<cir::IntAttr>(constOp.getValue());
+    // Just skip out if the constant count is zero.
+    if (constIntAttr && constIntAttr.getUInt() <= initListElements)
+      return;
+  }
+
+  assert(init && "have trailing elements to initialize but no initializer");
+
+  // If this is a constructor call, try to optimize it out, and failing that
+  // emit a single loop to initialize all remaining elements.
+  if (const CXXConstructExpr *cce = dyn_cast<CXXConstructExpr>(init)) {
+    CXXConstructorDecl *ctor = cce->getConstructor();
+    if (ctor->isTrivial()) {
+      // If new expression did not specify value-initialization, then there
+      // is no initialization.
+      if (!cce->requiresZeroInitialization())
+        return;
+
+      cgm.errorNYI(cce->getSourceRange(),
+                   "emitNewArrayInitializer: trivial ctor zero-init");
+      return;
+    }
+
+    cgm.errorNYI(cce->getSourceRange(),
+                 "emitNewArrayInitializer: ctor initializer");
+    return;
+  }
+
+  cgm.errorNYI(init->getSourceRange(),
+               "emitNewArrayInitializer: unsupported initializer");
+  return;
 }
 
 static void emitNewInitializer(CIRGenFunction &cgf, const CXXNewExpr *e,
@@ -563,9 +618,6 @@ mlir::Value CIRGenFunction::emitCXXNewExpr(const CXXNewExpr *e) {
 
   // If there is a brace-initializer, cannot allocate fewer elements than inits.
   unsigned minElements = 0;
-  if (e->isArray() && e->hasInitializer()) {
-    cgm.errorNYI(e->getSourceRange(), "emitCXXNewExpr: array initializer");
-  }
 
   mlir::Value numElements = nullptr;
   mlir::Value allocSizeWithoutCookie = nullptr;
@@ -644,8 +696,11 @@ mlir::Value CIRGenFunction::emitCXXNewExpr(const CXXNewExpr *e) {
       !e->getOperatorDelete()->isReservedGlobalPlacementOperator())
     cgm.errorNYI(e->getSourceRange(), "emitCXXNewExpr: operator delete");
 
-  if (allocSize != allocSizeWithoutCookie)
-    cgm.errorNYI(e->getSourceRange(), "emitCXXNewExpr: array with cookies");
+  if (allocSize != allocSizeWithoutCookie) {
+    assert(e->isArray());
+    allocation = cgm.getCXXABI().initializeArrayCookie(
+        *this, allocation, numElements, e, allocType);
+  }
 
   mlir::Type elementTy;
   if (e->isArray()) {

clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp

@@ -132,8 +132,14 @@ class CIRGenItaniumCXXABI : public CIRGenCXXABI {
                               cir::PointerType destCIRTy, bool isRefCast,
                               Address src) override;
 
-  /**************************** RTTI Uniqueness ******************************/
+  Address initializeArrayCookie(CIRGenFunction &cgf, Address newPtr,
+                                mlir::Value numElements, const CXXNewExpr *e,
+                                QualType elementType) override;
+
 protected:
+  CharUnits getArrayCookieSizeImpl(QualType elementType) override;
+
+  /**************************** RTTI Uniqueness ******************************/
   /// Returns true if the ABI requires RTTI type_info objects to be unique
   /// across a program.
   virtual bool shouldRTTIBeUnique() const { return true; }
@@ -1977,3 +1983,72 @@ mlir::Value CIRGenItaniumCXXABI::emitDynamicCast(CIRGenFunction &cgf,
   return cgf.getBuilder().createDynCast(loc, src.getPointer(), destCIRTy,
                                         isRefCast, castInfo);
 }
+
+/************************** Array allocation cookies **************************/
+
+CharUnits CIRGenItaniumCXXABI::getArrayCookieSizeImpl(QualType elementType) {
+  // The array cookie is a size_t; pad that up to the element alignment.
+  // The cookie is actually right-justified in that space.
+  return std::max(
+      CharUnits::fromQuantity(cgm.SizeSizeInBytes),
+      cgm.getASTContext().getPreferredTypeAlignInChars(elementType));
+}
+
+Address CIRGenItaniumCXXABI::initializeArrayCookie(CIRGenFunction &cgf,
+                                                   Address newPtr,
+                                                   mlir::Value numElements,
+                                                   const CXXNewExpr *e,
+                                                   QualType elementType) {
+  assert(requiresArrayCookie(e));
+
+  // TODO: Get the address space when sanitizer support is implemented.
+
+  ASTContext &ctx = cgm.getASTContext();
+  CharUnits sizeSize = cgf.getSizeSize();
+  mlir::Location loc = cgf.getLoc(e->getSourceRange());
+
+  // The size of the cookie.
+  CharUnits cookieSize =
+      std::max(sizeSize, ctx.getPreferredTypeAlignInChars(elementType));
+  assert(cookieSize == getArrayCookieSizeImpl(elementType));
+
+  auto u8Ty = cgf.getBuilder().getUIntNTy(8);
+  auto u8PtrTy = cgf.getBuilder().getPointerTo(u8Ty);
+  mlir::Value baseBytePtr =
+      cgf.getBuilder().createPtrBitcast(newPtr.getPointer(), u8PtrTy);
+
+  // Compute an offset to the cookie.
+  CharUnits cookieOffset = cookieSize - sizeSize;
+  mlir::Value cookiePtrValue = baseBytePtr;
+  if (!cookieOffset.isZero()) {
+    auto offsetOp = cgf.getBuilder().getSignedInt(
+        loc, cookieOffset.getQuantity(), /*width=*/32);
+    cookiePtrValue =
+        cgf.getBuilder().createPtrStride(loc, cookiePtrValue, offsetOp);
+  }
+
+  CharUnits baseAlignment = newPtr.getAlignment();
+  CharUnits cookiePtrAlignment = baseAlignment.alignmentAtOffset(cookieOffset);
+  Address cookiePtr(cookiePtrValue, u8PtrTy, cookiePtrAlignment);
+
+  // Write the number of elements into the appropriate slot.
+  Address numElementsPtr =
+      cookiePtr.withElementType(cgf.getBuilder(), cgf.SizeTy);
+  cgf.getBuilder().createStore(loc, numElements, numElementsPtr);
+
+  if (cgf.sanOpts.has(SanitizerKind::Address)) {
+    cgm.errorNYI(e->getSourceRange(),
+                 "initializeArrayCookie: AddressSanitizer");
+  }
+
+  // Finally, compute a pointer to the actual data buffer by skipping
+  // over the cookie completely.
+  auto dataOffset = cgf.getBuilder().getSignedInt(loc, cookieSize.getQuantity(),
+                                                  /*width=*/32);
+  mlir::Value dataPtr =
+      cgf.getBuilder().createPtrStride(loc, baseBytePtr, dataOffset);
+  mlir::Value finalPtr =
+      cgf.getBuilder().createPtrBitcast(dataPtr, newPtr.getElementType());
+  CharUnits finalAlignment = baseAlignment.alignmentAtOffset(cookieSize);
+  return Address(finalPtr, newPtr.getElementType(), finalAlignment);
+}

clang/lib/CIR/CodeGen/CIRGenModule.cpp

@@ -100,7 +100,7 @@ CIRGenModule::CIRGenModule(mlir::MLIRContext &mlirContext,
   // TODO(CIR): Should be updated once TypeSizeInfoAttr is upstreamed
   const unsigned sizeTypeSize =
       astContext.getTypeSize(astContext.getSignedSizeType());
-  SizeAlignInBytes = astContext.toCharUnitsFromBits(sizeTypeSize).getQuantity();
+  SizeSizeInBytes = astContext.toCharUnitsFromBits(sizeTypeSize).getQuantity();
   // In CIRGenTypeCache, UIntPtrTy and SizeType are fields of the same union
   UIntPtrTy =
       cir::IntType::get(&getMLIRContext(), sizeTypeSize, /*isSigned=*/false);

clang/lib/CIR/CodeGen/CIRGenTypeCache.h

@@ -71,11 +71,17 @@ struct CIRGenTypeCache {
     unsigned char PointerSizeInBytes;
   };
 
-  /// The alignment of size_t.
-  unsigned char SizeAlignInBytes;
+  /// The size and alignment of size_t.
+  union {
+    unsigned char SizeSizeInBytes; // sizeof(size_t)
+    unsigned char SizeAlignInBytes;
+  };
 
   cir::TargetAddressSpaceAttr cirAllocaAddressSpace;
 
+  clang::CharUnits getSizeSize() const {
+    return clang::CharUnits::fromQuantity(SizeSizeInBytes);
+  }
   clang::CharUnits getSizeAlign() const {
     return clang::CharUnits::fromQuantity(SizeAlignInBytes);
   }

clang/test/CIR/CodeGen/new.cpp

@@ -208,6 +208,125 @@ void t_new_constant_size() {
 // OGCG:   %[[CALL:.*]] = call noalias noundef nonnull ptr @_Znam(i64 noundef 128)
 // OGCG:   store ptr %[[CALL]], ptr %[[P_ADDR]], align 8
 
+class C {
+  public:
+    ~C();
+};
+
+void t_constant_size_nontrivial() {
+  auto p = new C[3];
+}
+
+// CHECK:  cir.func{{.*}} @_Z26t_constant_size_nontrivialv()
+// CHECK:    %[[P_ADDR:.*]] = cir.alloca !cir.ptr<!rec_C>, !cir.ptr<!cir.ptr<!rec_C>>, ["p", init] {alignment = 8 : i64}
+// CHECK:    %[[#NUM_ELEMENTS:]] = cir.const #cir.int<3> : !u64i
+// CHECK:    %[[#SIZE_WITHOUT_COOKIE:]] = cir.const #cir.int<3> : !u64i
+// CHECK:    %[[#ALLOCATION_SIZE:]] = cir.const #cir.int<11> : !u64i
+// CHECK:    %[[RAW_PTR:.*]] = cir.call @_Znam(%[[#ALLOCATION_SIZE]]) : (!u64i) -> !cir.ptr<!void>
+// CHECK:    %[[COOKIE_PTR_BASE:.*]] = cir.cast bitcast %[[RAW_PTR]] : !cir.ptr<!void> -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[COOKIE_PTR:.*]] = cir.cast bitcast %[[COOKIE_PTR_BASE]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!u64i>
+// CHECK:    cir.store align(8) %[[#NUM_ELEMENTS]], %[[COOKIE_PTR]] : !u64i, !cir.ptr<!u64i>
+// CHECK:    %[[#COOKIE_SIZE:]] = cir.const #cir.int<8> : !s32i
+// CHECK:    %[[DATA_PTR_RAW:.*]] = cir.ptr_stride %[[COOKIE_PTR_BASE]], %[[#COOKIE_SIZE]] : (!cir.ptr<!cir.ptr<!u8i>>, !s32i) -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[DATA_PTR_VOID:.*]] = cir.cast bitcast %[[DATA_PTR_RAW]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!void>
+// CHECK:    %[[DATA_PTR:.*]] = cir.cast bitcast %[[DATA_PTR_VOID]] : !cir.ptr<!void> -> !cir.ptr<!rec_C>
+// CHECK:    cir.store align(8) %[[DATA_PTR]], %[[P_ADDR]] : !cir.ptr<!rec_C>, !cir.ptr<!cir.ptr<!rec_C>>
+// CHECK:    cir.return
+// CHECK:  }
+
+// LLVM: @_Z26t_constant_size_nontrivialv()
+// LLVM:   %[[ALLOCA:.*]] = alloca ptr, i64 1, align 8
+// LLVM:   %[[COOKIE_PTR:.*]] = call ptr @_Znam(i64 11)
+// LLVM:   store i64 3, ptr %[[COOKIE_PTR]], align 8
+// LLVM:   %[[ALLOCATED_PTR:.*]] = getelementptr ptr, ptr %[[COOKIE_PTR]], i64 8
+// LLVM:   store ptr %[[ALLOCATED_PTR]], ptr %[[ALLOCA]], align 8
+
+// OGCG: @_Z26t_constant_size_nontrivialv()
+// OGCG:   %[[ALLOCA:.*]] = alloca ptr, align 8
+// OGCG:   %[[COOKIE_PTR:.*]] = call noalias noundef nonnull ptr @_Znam(i64 noundef 11)
+// OGCG:   store i64 3, ptr %[[COOKIE_PTR]], align 8
+// OGCG:   %[[ALLOCATED_PTR:.*]] = getelementptr inbounds i8, ptr %[[COOKIE_PTR]], i64 8
+// OGCG:   store ptr %[[ALLOCATED_PTR]], ptr %[[ALLOCA]], align 8
+
+class D {
+  public:
+    int x;
+    ~D();
+};
+
+void t_constant_size_nontrivial2() {
+  auto p = new D[3];
+}
+
+// In this test SIZE_WITHOUT_COOKIE isn't used, but it would be if there were
+// an initializer.
+
+// CHECK:  cir.func{{.*}} @_Z27t_constant_size_nontrivial2v()
+// CHECK:    %[[P_ADDR:.*]] = cir.alloca !cir.ptr<!rec_D>, !cir.ptr<!cir.ptr<!rec_D>>, ["p", init] {alignment = 8 : i64}
+// CHECK:    %[[#NUM_ELEMENTS:]] = cir.const #cir.int<3> : !u64i
+// CHECK:    %[[#SIZE_WITHOUT_COOKIE:]] = cir.const #cir.int<12> : !u64i
+// CHECK:    %[[#ALLOCATION_SIZE:]] = cir.const #cir.int<20> : !u64i
+// CHECK:    %[[RAW_PTR:.*]] = cir.call @_Znam(%[[#ALLOCATION_SIZE]]) : (!u64i) -> !cir.ptr<!void>
+// CHECK:    %[[COOKIE_PTR_BASE:.*]] = cir.cast bitcast %[[RAW_PTR]] : !cir.ptr<!void> -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[COOKIE_PTR:.*]] = cir.cast bitcast %[[COOKIE_PTR_BASE]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!u64i>
+// CHECK:    cir.store align(8) %[[#NUM_ELEMENTS]], %[[COOKIE_PTR]] : !u64i, !cir.ptr<!u64i>
+// CHECK:    %[[#COOKIE_SIZE:]] = cir.const #cir.int<8> : !s32i
+// CHECK:    %[[DATA_PTR_RAW:.*]] = cir.ptr_stride %[[COOKIE_PTR_BASE]], %[[#COOKIE_SIZE]] : (!cir.ptr<!cir.ptr<!u8i>>, !s32i) -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[DATA_PTR_VOID:.*]] = cir.cast bitcast %[[DATA_PTR_RAW]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!void>
+// CHECK:    %[[DATA_PTR:.*]] = cir.cast bitcast %[[DATA_PTR_VOID]] : !cir.ptr<!void> -> !cir.ptr<!rec_D>
+// CHECK:    cir.store align(8) %[[DATA_PTR]], %[[P_ADDR]] : !cir.ptr<!rec_D>, !cir.ptr<!cir.ptr<!rec_D>>
+// CHECK:    cir.return
+// CHECK:  }
+
+// LLVM: @_Z27t_constant_size_nontrivial2v()
+// LLVM:   %[[ALLOCA:.*]] = alloca ptr, i64 1, align 8
+// LLVM:   %[[COOKIE_PTR:.*]] = call ptr @_Znam(i64 20)
+// LLVM:   store i64 3, ptr %[[COOKIE_PTR]], align 8
+// LLVM:   %[[ALLOCATED_PTR:.*]] = getelementptr ptr, ptr %[[COOKIE_PTR]], i64 8
+// LLVM:   store ptr %[[ALLOCATED_PTR]], ptr %[[ALLOCA]], align 8
+
+struct alignas(16) E {
+  int x;
+  ~E();
+};
+
+void t_align16_nontrivial() {
+  auto p = new E[2];
+}
+
+// CHECK:  cir.func{{.*}} @_Z20t_align16_nontrivialv()
+// CHECK:    %[[P_ADDR:.*]] = cir.alloca !cir.ptr<!rec_E>, !cir.ptr<!cir.ptr<!rec_E>>, ["p", init] {alignment = 8 : i64}
+// CHECK:    %[[#NUM_ELEMENTS:]] = cir.const #cir.int<2> : !u64i
+// CHECK:    %[[#SIZE_WITHOUT_COOKIE:]] = cir.const #cir.int<32> : !u64i
+// CHECK:    %[[#ALLOCATION_SIZE:]] = cir.const #cir.int<48> : !u64i
+// CHECK:    %[[RAW_PTR:.*]] = cir.call @_Znam(%[[#ALLOCATION_SIZE]]) : (!u64i) -> !cir.ptr<!void>
+// CHECK:    %[[COOKIE_PTR_BASE:.*]] = cir.cast bitcast %[[RAW_PTR]] : !cir.ptr<!void> -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[COOKIE_OFFSET:.*]] = cir.const #cir.int<8> : !s32i
+// CHECK:    %[[COOKIE_PTR_RAW:.*]] = cir.ptr_stride %[[COOKIE_PTR_BASE]], %[[COOKIE_OFFSET]] : (!cir.ptr<!cir.ptr<!u8i>>, !s32i) -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[COOKIE_PTR:.*]] = cir.cast bitcast %[[COOKIE_PTR_RAW]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!u64i>
+// CHECK:    cir.store align(8) %[[#NUM_ELEMENTS]], %[[COOKIE_PTR]] : !u64i, !cir.ptr<!u64i>
+// CHECK:    %[[#COOKIE_SIZE:]] = cir.const #cir.int<16> : !s32i
+// CHECK:    %[[DATA_PTR_RAW:.*]] = cir.ptr_stride %[[COOKIE_PTR_BASE]], %[[#COOKIE_SIZE]] : (!cir.ptr<!cir.ptr<!u8i>>, !s32i) -> !cir.ptr<!cir.ptr<!u8i>>
+// CHECK:    %[[DATA_PTR_VOID:.*]] = cir.cast bitcast %[[DATA_PTR_RAW]] : !cir.ptr<!cir.ptr<!u8i>> -> !cir.ptr<!void>
+// CHECK:    %[[DATA_PTR:.*]] = cir.cast bitcast %[[DATA_PTR_VOID]] : !cir.ptr<!void> -> !cir.ptr<!rec_E>
+// CHECK:    cir.store align(8) %[[DATA_PTR]], %[[P_ADDR]] : !cir.ptr<!rec_E>, !cir.ptr<!cir.ptr<!rec_E>>
+// CHECK:    cir.return
+// CHECK:  }
+
+// LLVM: @_Z20t_align16_nontrivialv()
+// LLVM:   %[[ALLOCA:.*]] = alloca ptr, i64 1, align 8
+// LLVM:   %[[RAW_PTR:.*]] = call ptr @_Znam(i64 48)
+// LLVM:   %[[COOKIE_PTR:.*]] = getelementptr ptr, ptr %[[RAW_PTR]], i64 8
+// LLVM:   store i64 2, ptr %[[COOKIE_PTR]], align 8
+// LLVM:   %[[ALLOCATED_PTR:.*]] = getelementptr ptr, ptr %[[RAW_PTR]], i64 16
+// LLVM:   store ptr %[[ALLOCATED_PTR]], ptr %[[ALLOCA]], align 8
+
+// OGCG: @_Z27t_constant_size_nontrivial2v()
+// OGCG:   %[[ALLOCA:.*]] = alloca ptr, align 8
+// OGCG:   %[[COOKIE_PTR:.*]] = call noalias noundef nonnull ptr @_Znam(i64 noundef 20)
+// OGCG:   store i64 3, ptr %[[COOKIE_PTR]], align 8
+// OGCG:   %[[ALLOCATED_PTR:.*]] = getelementptr inbounds i8, ptr %[[COOKIE_PTR]], i64 8
+// OGCG:   store ptr %[[ALLOCATED_PTR]], ptr %[[ALLOCA]], align 8
 
 void t_new_multidim_constant_size() {
   auto p = new double[2][3][4];