Use dereferencable attribute in Clang for C++ references

[hfinkel]

Summary

This is the Clang companion patch to http://reviews.llvm.org/D4449 which adds a dereferencable function parameter attribute (like the nonnull attribute, but specifying that the pointer is dereferencable like the value of an alloca is dereferencable). This patch causes the dereferencable attribute to appear on reference parameters (and return values) just like nonnull does currently.

As mentioned in the llvm patch summary, my motivating use case is C++ references that are passes as function parameters and used in loops. For example,

void foo(int * restrict a, int * restrict b, int &c, int n) {

for (int i = 0; i < n; ++i)
  if (a[i] > 0)
    a[i] = c*b[i];

}

Currently, we generate a load of 'c' in every loop iteration because we can't prove that there is no control dependence on the dereferencability of 'c' from the if condition. But because 'c' is a reference, we know it must point to something, and since nothing else in the loop can alias it, it is safe to load it in the preheader.

[hfinkel]

Updated for changes in the LLVM patch (in response to Nick's review).

There also need to be a lot of regression-test updates (not yet included here).

[hfinkel]

Updated patch (associated with the updated LLVM patch). There is no longer a size limit, so that concern no longer applies.

I've changed the logic slightly, so that:

• We add the dereferenceable attribute for complete (constant-sized) types.
• Otherwise, in addrspace(0), we add nonnull

(this is a slight change in behavior, because we used to add nonnull even for non-addrspace(0) references, but I think this is wrong (and I'm missing a test case for this, and I'll certainly add one)).

Alternatively, we could add dereferenceable(1) for incomplete types instead of falling back to nonnull. Preferences?

[hfinkel]

Fixed up the remaining regression tests (now all pass), and added a new test for dereferenceable/nonnull on non-addrspace(0) references.

[hfinkel]

Richard accepted, will close.

[hfinkel]

r213386, thanks!

lib/CodeGen/CGCall.cpp

FuncAttrs.removeAttribute(llvm::Attribute::ReadOnly)
       .removeAttribute(llvm::Attribute::ReadNone);
     break;
   }
 
   case ABIArgInfo::Expand:
     llvm_unreachable("Invalid ABI kind for return argument");
   }
 
-  if (RetTy->isReferenceType())
+  if (RetTy->isReferenceType()) {
+    QualType PTy = RetTy->getAs<ReferenceType>()->getPointeeType();
+    if (!PTy->isIncompleteType() && PTy->isConstantSizeType())
+      RetAttrs.addDereferenceableAttr(getContext().getTypeSizeInChars(PTy)
+                                        .getQuantity());
+    else if (getContext().getTargetAddressSpace(PTy) == 0)
       RetAttrs.addAttribute(llvm::Attribute::NonNull);
+  }
 
   if (RetAttrs.hasAttributes())
     PAL.push_back(llvm::
                   AttributeSet::get(getLLVMContext(),
                                     llvm::AttributeSet::ReturnIndex,
                                     RetAttrs));
 
   for (const auto &I : FI.arguments()) {
case ABIArgInfo::Expand: {
       // anything here? The result should be just reconstructed on the other
       // side, so extension should be a non-issue.
       getTypes().GetExpandedTypes(ParamType, types);
       Index += types.size();
       continue;
     }
     }
 
-    if (ParamType->isReferenceType())
+    if (ParamType->isReferenceType()) {
+      QualType PTy = ParamType->getAs<ReferenceType>()->getPointeeType();
+      if (!PTy->isIncompleteType() && PTy->isConstantSizeType())
+        Attrs.addDereferenceableAttr(getContext().getTypeSizeInChars(PTy)
+                                       .getQuantity());
+      else if (getContext().getTargetAddressSpace(PTy) == 0)
         Attrs.addAttribute(llvm::Attribute::NonNull);
+    }
 
     if (Attrs.hasAttributes())
       PAL.push_back(llvm::AttributeSet::get(getLLVMContext(), Index, Attrs));
     ++Index;
   }
 
   // Add the inalloca attribute to the trailing inalloca parameter if present.
   if (FI.usesInAlloca()) {

test/CXX/except/except.spec/p14-ir.cpp

 
 struct X4 {
   X4(X4 &) throw();
 };
 
 struct X5 : X0, X4 { };
 
 void test(X2 x2, X3 x3, X5 x5) {
-  // CHECK: define linkonce_odr void @_ZN2X2C1ERKS_(%struct.X2* %this, %struct.X2* nonnull) unnamed_addr
+  // CHECK: define linkonce_odr void @_ZN2X2C1ERKS_(%struct.X2* %this, %struct.X2* dereferenceable({{[0-9]+}})) unnamed_addr
   // CHECK:      call void @_ZN2X2C2ERKS_({{.*}}) [[NUW:#[0-9]+]]
   // CHECK-NEXT: ret void
   // CHECK-NEXT: }
   X2 x2a(x2);
-  // CHECK: define linkonce_odr void @_ZN2X3C1ERKS_(%struct.X3* %this, %struct.X3* nonnull) unnamed_addr
+  // CHECK: define linkonce_odr void @_ZN2X3C1ERKS_(%struct.X3* %this, %struct.X3* dereferenceable({{[0-9]+}})) unnamed_addr
   // CHECK:      call void @_ZN2X3C2ERKS_({{.*}}) [[NUW]]
   // CHECK-NEXT: ret void
   // CHECK-NEXT: }
   X3 x3a(x3);
   // CHECK: define linkonce_odr void @_ZN2X5C1ERS_({{.*}}) unnamed_addr
   // CHECK-NOT: call void @__cxa_call_unexpected
   // CHECK: ret void
   X5 x5a(x5);

test/CodeGenCXX/address-space-ref.cpp

+// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
+
+// For a reference to a complete type, output the dereferenceable attribute (in
+// any address space).
+
+typedef int a __attribute__((address_space(1)));
+
+a & foo(a &x, a & y) {
+  return x;
+}
+
+// CHECK: define dereferenceable(4) i32 addrspace(1)* @_Z3fooRU3AS1iS0_(i32 addrspace(1)* dereferenceable(4) %x, i32 addrspace(1)* dereferenceable(4) %y)
+
+// For a reference to an incomplete type in an alternate address space, output
+// neither dereferenceable nor nonnull.
+
+class bc;
+typedef bc b __attribute__((address_space(1)));
+
+b & bar(b &x, b & y) {
+  return x;
+}
+
+// CHECK: define %class.bc addrspace(1)* @_Z3barRU3AS12bcS1_(%class.bc addrspace(1)* %x, %class.bc addrspace(1)* %y)
+
+// For a reference to an incomplete type in addrspace(0), output nonnull.
+
+bc & bar2(bc &x, bc & y) {
+  return x;
+}
+
+// CHECK: define nonnull %class.bc* @_Z4bar2R2bcS0_(%class.bc* nonnull %x, %class.bc* nonnull %y)
+
+

test/CodeGenCXX/blocks-cxx11.cpp

void test(A a) {
     lambda(); // make sure we emit the invocation function
   }
   // CHECK-LABEL:    define internal void @"_ZZN20test_block_in_lambda4testENS_1AEENK3$_0clEv"(
   // CHECK:      [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
   // CHECK:      [[THIS:%.*]] = load [[LAMBDA_T:%.*]]**
   // CHECK:      [[TO_DESTROY:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
   // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
   // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[LAMBDA_T]]* [[THIS]], i32 0, i32 0
-  // CHECK-NEXT: call void @_ZN20test_block_in_lambda1AC1ERKS0_({{.*}}* [[T0]], {{.*}}* nonnull [[T1]])
+  // CHECK-NEXT: call void @_ZN20test_block_in_lambda1AC1ERKS0_({{.*}}* [[T0]], {{.*}}* dereferenceable({{[0-9]+}}) [[T1]])
   // CHECK-NEXT: [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
   // CHECK-NEXT: call void @_ZN20test_block_in_lambda9takeBlockEU13block_pointerFvvE(void ()* [[T0]])
   // CHECK-NEXT: call void @_ZN20test_block_in_lambda1AD1Ev({{.*}}* [[TO_DESTROY]])
   // CHECK-NEXT: ret void
 }

test/CodeGenCXX/blocks.cpp

namespace test5 {
   // CHECK-NEXT: [[CLEANUP_ADDR:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
   // CHECK-NEXT: [[T0:%.*]] = load i8* [[COND]], align 1
   // CHECK-NEXT: [[T1:%.*]] = trunc i8 [[T0]] to i1
   // CHECK-NEXT: store i1 false, i1* [[CLEANUP_ACTIVE]]
   // CHECK-NEXT: br i1 [[T1]],
 
   // CHECK-NOT:  br
   // CHECK:      [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
-  // CHECK-NEXT: call void @_ZN5test51AC1ERKS0_([[A]]* [[CAPTURE]], [[A]]* nonnull [[X]])
+  // CHECK-NEXT: call void @_ZN5test51AC1ERKS0_([[A]]* [[CAPTURE]], [[A]]* dereferenceable({{[0-9]+}}) [[X]])
   // CHECK-NEXT: store i1 true, i1* [[CLEANUP_ACTIVE]]
   // CHECK-NEXT: bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
   // CHECK-NEXT: br label
   // CHECK:      br label
   // CHECK:      phi
   // CHECK-NEXT: store
   // CHECK-NEXT: load
   // CHECK-NEXT: call void @_ZN5test511doWithBlockEU13block_pointerFvvE(

test/CodeGenCXX/catch-undef-behavior.cpp

void downcast_pointer(B *b) {
   // CHECK: [[C_INT:%[0-9]*]] = ptrtoint %class.C* [[FROM_PHI]] to i64
   // CHECK-NEXT: [[MASKED:%[0-9]*]] = and i64 [[C_INT]], 15
   // CHECK-NEXT: [[TEST:%[0-9]*]] = icmp eq i64 [[MASKED]], 0
   // AND the alignment test with the objectsize test.
   // CHECK-NEXT: [[AND:%[0-9]*]] = and i1 {{.*}}, [[TEST]]
   // CHECK-NEXT: br i1 [[AND]]
 }
 
-// CHECK-LABEL: define void @_Z18downcast_referenceR1B(%class.B* nonnull %b)
+// CHECK-LABEL: define void @_Z18downcast_referenceR1B(%class.B* dereferenceable({{[0-9]+}}) %b)
 void downcast_reference(B &b) {
   (void) static_cast<C&>(b);
   // Alignment check from EmitTypeCheck(TCK_DowncastReference, ...)
   // CHECK:      [[SUB:%[.a-z0-9]*]] = getelementptr i8* {{.*}}, i64 -16
   // CHECK-NEXT: [[C:%[0-9]*]] = bitcast i8* [[SUB]] to %class.C*
   // Objectsize check goes here
   // CHECK:      [[C_INT:%[0-9]*]] = ptrtoint %class.C* [[C]] to i64
   // CHECK-NEXT: [[MASKED:%[0-9]*]] = and i64 [[C_INT]], 15

test/CodeGenCXX/conditional-gnu-ext.cpp

namespace test3 {
 
   B test0(B &x) {
     // CHECK-LABEL:    define void @_ZN5test35test0ERNS_1BE(
     // CHECK:      [[X:%.*]] = alloca [[B:%.*]]*,
     // CHECK-NEXT: store [[B]]* {{%.*}}, [[B]]** [[X]]
     // CHECK-NEXT: [[T0:%.*]] = load [[B]]** [[X]]
     // CHECK-NEXT: [[BOOL:%.*]] = call zeroext i1 @_ZN5test31BcvbEv([[B]]* [[T0]])
     // CHECK-NEXT: br i1 [[BOOL]]
-    // CHECK:      call void @_ZN5test31BC1ERKS0_([[B]]* [[RESULT:%.*]], [[B]]* nonnull [[T0]])
+    // CHECK:      call void @_ZN5test31BC1ERKS0_([[B]]* [[RESULT:%.*]], [[B]]* dereferenceable({{[0-9]+}}) [[T0]])
     // CHECK-NEXT: br label
     // CHECK:      call void @_ZN5test31BC1Ev([[B]]* [[RESULT]])
     // CHECK-NEXT: br label
     // CHECK:      ret void
     return x ?: B();
   }
 
   B test1() {
     // CHECK-LABEL:    define void @_ZN5test35test1Ev(
     // CHECK:      [[TEMP:%.*]] = alloca [[B]],
     // CHECK-NEXT: call  void @_ZN5test312test1_helperEv([[B]]* sret [[TEMP]])
     // CHECK-NEXT: [[BOOL:%.*]] = call zeroext i1 @_ZN5test31BcvbEv([[B]]* [[TEMP]])
     // CHECK-NEXT: br i1 [[BOOL]]
-    // CHECK:      call void @_ZN5test31BC1ERKS0_([[B]]* [[RESULT:%.*]], [[B]]* nonnull [[TEMP]])
+    // CHECK:      call void @_ZN5test31BC1ERKS0_([[B]]* [[RESULT:%.*]], [[B]]* dereferenceable({{[0-9]+}}) [[TEMP]])
     // CHECK-NEXT: br label
     // CHECK:      call void @_ZN5test31BC1Ev([[B]]* [[RESULT]])
     // CHECK-NEXT: br label
     // CHECK:      call void @_ZN5test31BD1Ev([[B]]* [[TEMP]])
     // CHECK-NEXT: ret void
     extern B test1_helper();
     return test1_helper() ?: B();
   }

test/CodeGenCXX/const-init-cxx11.cpp

void test() {
     consume(b);
 
     // CHECK: call void @_ZN13InitFromConst7consumeIiEEvT_(i32 5)
     consume(n);
 
     // CHECK: call void @_ZN13InitFromConst7consumeIdEEvT_(double 4.300000e+00)
     consume(d);
 
-    // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* nonnull @_ZN13InitFromConstL1sE)
+    // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE)
     consume<const S&>(s);
 
-    // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* nonnull @_ZN13InitFromConstL1sE)
+    // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE)
     consume<const S&>(r);
 
     // CHECK: call void @_ZN13InitFromConst7consumeIPKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE)
     consume(p);
 
     // CHECK: call void @_ZN13InitFromConst7consumeIMNS_1SEiEEvT_(i64 0)
     consume(mp);
 

test/CodeGenCXX/constructor-direct-call.cpp

void f3() {
   Test3 var;
 
   // CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1Ev(%class.Test3* %var2)
   Test3 var2;
 
   // CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1Ev(%class.Test3* %var)
   var.Test3::Test3();
 
-  // CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1ERKS_(%class.Test3* %var, %class.Test3* nonnull %var2)
+  // CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1ERKS_(%class.Test3* %var, %class.Test3* dereferenceable({{[0-9]+}}) %var2)
   var.Test3::Test3(var2);
 }

test/CodeGenCXX/constructor-init.cpp

struct X {
   T *start;
   T *end;
 };
 
 template<typename T> struct X;
 
 // Make sure that the instantiated constructor initializes start and
 // end properly.
-// CHECK-LABEL: define linkonce_odr void @_ZN1XIiEC2ERKS0_(%struct.X* %this, %struct.X* nonnull %other) unnamed_addr
+// CHECK-LABEL: define linkonce_odr void @_ZN1XIiEC2ERKS0_(%struct.X* %this, %struct.X* dereferenceable({{[0-9]+}}) %other) unnamed_addr
 // CHECK: {{store.*null}}
 // CHECK: {{store.*null}}
 // CHECK: ret
 template<typename T>
 X<T>::X(const X &other) : start(0), end(0) { }
 
 X<int> get_X(X<int> x) { return x; }
 

test/CodeGenCXX/convert-to-fptr.cpp

  printf("i = %d\n", i);
 
  int j = b(20); // Calls f1 via pointer returned from conversion function
  printf("j = %d\n", j);
  return 0;
 }
 
 // CHECK: call i32 (i32)* (%struct.A*)* @_ZN1AcvPFiiEEv
-// CHECK: call nonnull i32 (i32)* (%struct.B*)* @_ZN1BcvRFiiEEv
+// CHECK: call i32 (i32)* (%struct.B*)* @_ZN1BcvRFiiEEv

test/CodeGenCXX/copy-assign-synthesis-1.cpp

 
 int main() {
   dstY = dstX = srcX;
   srcX.pr();
   dstX.pr();
   dstY.pr();
 }
 
-// CHECK: define linkonce_odr nonnull %struct.X* @_ZN1XaSERKS_
+// CHECK: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.X* @_ZN1XaSERKS_

test/CodeGenCXX/copy-constructor-elim-2.cpp

namespace no_elide_base {
   struct Other {
     operator Base() const;
   };
 
   struct Derived : public virtual Base { 
     Derived(const Other &O);
   };
 
-  // CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* returned %this, %"struct.no_elide_base::Other"* nonnull %O) unnamed_addr
+  // CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* returned %this, %"struct.no_elide_base::Other"* dereferenceable({{[0-9]+}}) %O) unnamed_addr
   Derived::Derived(const Other &O) 
     // CHECK: call {{.*}} @_ZNK13no_elide_base5OthercvNS_4BaseEEv
     // CHECK: call {{.*}} @_ZN13no_elide_base4BaseC2ERKS0_
     // CHECK: call {{.*}} @_ZN13no_elide_base4BaseD1Ev
     : Base(O)
   {
     // CHECK: ret
   }

test/CodeGenCXX/copy-constructor-synthesis-2.cpp

 // RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
 
 struct A { virtual void a(); };
 A x(A& y) { return y; }
 
-// CHECK: define linkonce_odr {{.*}} @_ZN1AC1ERKS_(%struct.A* {{.*}}%this, %struct.A* nonnull) unnamed_addr
+// CHECK: define linkonce_odr {{.*}} @_ZN1AC1ERKS_(%struct.A* {{.*}}%this, %struct.A* dereferenceable({{[0-9]+}})) unnamed_addr
 // CHECK: store i8** getelementptr inbounds ([3 x i8*]* @_ZTV1A, i64 0, i64 2)

test/CodeGenCXX/copy-constructor-synthesis.cpp

 };
 
 struct P {
   int iP;
   P() : iP(init++) {}
 };
 
 
-// CHECK-LABEL: define linkonce_odr void @_ZN1XC1ERKS_(%struct.X* %this, %struct.X* nonnull) unnamed_addr
+// CHECK-LABEL: define linkonce_odr void @_ZN1XC1ERKS_(%struct.X* %this, %struct.X* dereferenceable({{[0-9]+}})) unnamed_addr
 struct X  : M, N, P { // ...
   X() : f1(1.0), d1(2.0), i1(3), name("HELLO"), bf1(0xff), bf2(0xabcd),
         au_i1(1234), au1_4("MASKED") {}
   P p0;
   void pr() {
     printf("iM = %d iN = %d, m1.iM = %d\n", iM, iN, m1.iM); 
     printf("im = %d p0.iP = %d, p1.iP = %d\n", iP, p0.iP, p1.iP); 
     printf("f1 = %f  d1 = %f  i1 = %d name(%s) \n", f1, d1, i1, name);
struct B : A {
   A a[10];
 };
 
 // Force the copy constructor to be synthesized.
 void f(B b1) {
   B b2 = b1;
 }
 
-// CHECK:    define linkonce_odr nonnull [[A:%.*]]* @_ZN12rdar138169401AaSERKS0_(
+// CHECK:    define linkonce_odr dereferenceable({{[0-9]+}}) [[A:%.*]]* @_ZN12rdar138169401AaSERKS0_(
 // CHECK:      [[THIS:%.*]] = load [[A]]**
 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[A]]* [[THIS]], i32 0, i32 1
 // CHECK-NEXT: [[OTHER:%.*]] = load [[A]]**
 // CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[A]]* [[OTHER]], i32 0, i32 1
 // CHECK-NEXT: [[T4:%.*]] = bitcast i16* [[T0]] to i8*
 // CHECK-NEXT: [[T5:%.*]] = bitcast i16* [[T2]] to i8*
 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T4]], i8* [[T5]], i64 8, i32 8, i1 false)
 // CHECK-NEXT: ret [[A]]* [[THIS]]
 
 // CHECK-LABEL:    define linkonce_odr void @_ZN12rdar138169401AC2ERKS0_(
 // CHECK:      [[THIS:%.*]] = load [[A]]**
 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[THIS]] to i8***
 // CHECK-NEXT: store i8** getelementptr inbounds ([4 x i8*]* @_ZTVN12rdar138169401AE, i64 0, i64 2), i8*** [[T0]]
 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[A]]* [[THIS]], i32 0, i32 1
 // CHECK-NEXT: [[OTHER:%.*]] = load [[A]]**
 // CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[A]]* [[OTHER]], i32 0, i32 1
 // CHECK-NEXT: [[T4:%.*]] = bitcast i16* [[T0]] to i8*
 // CHECK-NEXT: [[T5:%.*]] = bitcast i16* [[T2]] to i8*
 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T4]], i8* [[T5]], i64 8, i32 8, i1 false)
 // CHECK-NEXT: ret void
 
-// CHECK-LABEL: define linkonce_odr void @_ZN6PR66281BC2ERKS0_(%"struct.PR6628::B"* %this, %"struct.PR6628::B"* nonnull) unnamed_addr
+// CHECK-LABEL: define linkonce_odr void @_ZN6PR66281BC2ERKS0_(%"struct.PR6628::B"* %this, %"struct.PR6628::B"* dereferenceable({{[0-9]+}})) unnamed_addr
 // CHECK: call void @_ZN6PR66281TC1Ev
 // CHECK: call void @_ZN6PR66281TC1Ev
 // CHECK: call void @_ZN6PR66281AC2ERKS0_RKNS_1TES5_
 // CHECK: call void @_ZN6PR66281TD1Ev
 // CHECK: call void @_ZN6PR66281TD1Ev
 // CHECK: call void @_ZN6PR66281TC1Ev
 // CHECK: call void @_ZN6PR66281TC1Ev
 // CHECK: call void @_ZN6PR66281AC1ERKS0_RKNS_1TES5_

test/CodeGenCXX/cxx11-initializer-aggregate.cpp

 
 struct B { int &r; int &f() { return r; } };
 
 // CHECK: define {{.*}}@_Z3fn2Ri(
 int &fn2(int &v) {
   // CHECK: %[[INITLIST2:.*]] = alloca %struct.B, align 8
   // CHECK: %[[R:.*]] = getelementptr inbounds %struct.B* %[[INITLIST2:.*]], i32 0, i32 0
   // CHECK: store i32* %{{.*}}, i32** %[[R]], align 8
-  // CHECK: call nonnull i32* @_ZN1B1fEv(%struct.B* %[[INITLIST2:.*]])
+  // CHECK: call dereferenceable({{[0-9]+}}) i32* @_ZN1B1fEv(%struct.B* %[[INITLIST2:.*]])
   return B{v}.f();
 }
 
 // CHECK: define {{.*}}@__cxx_global_var_init(
 //
 // CHECK: call {{.*}}@_ZN14NonTrivialInit1AC1Ev(
 // CHECK: getelementptr inbounds {{.*}}, i64 1
 // CHECK: br i1

test/CodeGenCXX/cxx11-thread-local-reference.cpp

 // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
 
 int &f();
 
 // CHECK: @r = thread_local global i32* null
 thread_local int &r = f();
 
 // CHECK: @_ZTH1r = alias void ()* @__tls_init
 
 int &g() { return r; }
 
 // CHECK: define {{.*}} @[[R_INIT:.*]]()
-// CHECK: call nonnull i32* @_Z1fv()
+// CHECK: call dereferenceable({{[0-9]+}}) i32* @_Z1fv()
 // CHECK: store i32* %{{.*}}, i32** @r, align 8
 
-// CHECK-LABEL: define nonnull i32* @_Z1gv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i32* @_Z1gv()
 // CHECK: call i32* @_ZTW1r()
 // CHECK: ret i32* %{{.*}}
 
 // CHECK: define weak_odr hidden i32* @_ZTW1r() {
 // CHECK: call void @_ZTH1r()
 // CHECK: load i32** @r, align 8
 // CHECK: ret i32* %{{.*}}
 
 // CHECK-LABEL: define internal void @__tls_init()
 // CHECK: call void @[[R_INIT]]()

test/CodeGenCXX/decl-ref-init.cpp

 extern B f(); 
 extern D d(); 
 
 int main() {
   const A& rca = f();
   const A& rca2 = d();
 }
 
-// CHECK: call nonnull %struct.A* @_ZN1BcvR1AEv
-// CHECK: call nonnull %struct.A* @_ZN1BcvR1AEv
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.A* @_ZN1BcvR1AEv
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.A* @_ZN1BcvR1AEv

test/CodeGenCXX/default-arg-temps.cpp

 public:
         X();
         X(const X&, const T& t = T());
 };
 
 // CHECK-LABEL: define void @_Z1gv()
 void g() {
   // CHECK:      call void @_ZN1TC1Ev([[T:%.*]]* [[AGG1:%.*]])
-  // CHECK-NEXT: call void @_Z1fRK1T([[T]]* nonnull [[AGG1]])
+  // CHECK-NEXT: call void @_Z1fRK1T([[T]]* dereferenceable({{[0-9]+}}) [[AGG1]])
   // CHECK-NEXT: call void @_ZN1TD1Ev([[T]]* [[AGG1]])
   f();
 
   // CHECK-NEXT: call void @_ZN1TC1Ev([[T:%.*]]* [[AGG2:%.*]])
-  // CHECK-NEXT: call void @_Z1fRK1T([[T]]* nonnull [[AGG2]])
+  // CHECK-NEXT: call void @_Z1fRK1T([[T]]* dereferenceable({{[0-9]+}}) [[AGG2]])
   // CHECK-NEXT: call void @_ZN1TD1Ev([[T]]* [[AGG2]])
   f();
 
   // CHECK-NEXT: call void @_ZN1XC1Ev(
   X a;
 
   // CHECK-NEXT: call void @_ZN1TC1Ev(
   // CHECK-NEXT: call void @_ZN1XC1ERKS_RK1T(

test/CodeGenCXX/derived-to-base-conv.cpp

struct X {
   C c;
 };
 
 void test0_helper(A);
 void test0(X x) {
   test0_helper(x);
   // CHECK-LABEL:    define void @_Z5test01X(
   // CHECK:      [[TMP:%.*]] = alloca [[A:%.*]], align
-  // CHECK-NEXT: [[T0:%.*]] = call nonnull [[B:%.*]]* @_ZN1XcvR1BEv(
+  // CHECK-NEXT: [[T0:%.*]] = call dereferenceable({{[0-9]+}}) [[B:%.*]]* @_ZN1XcvR1BEv(
   // CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]* [[T0]] to [[A]]*
-  // CHECK-NEXT: call void @_ZN1AC1ERKS_([[A]]* [[TMP]], [[A]]* nonnull [[T1]])
+  // CHECK-NEXT: call void @_ZN1AC1ERKS_([[A]]* [[TMP]], [[A]]* dereferenceable({{[0-9]+}}) [[T1]])
   // CHECK-NEXT: call void @_Z12test0_helper1A([[A]]* [[TMP]])
   // CHECK-NEXT: call void @_ZN1AD1Ev([[A]]* [[TMP]])
   // CHECK-NEXT: ret void
 }
 
 struct Base;
 
 struct Root {

test/CodeGenCXX/derived-to-virtual-base-class-calls-final.cpp

 // RUN: %clang_cc1 %s -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s
 
 struct A { int i; };
 struct B { char j; };
 struct C : A, B { int k; };
 
 struct D final : virtual C { 
   D(); 
   virtual void f();
 };
 
-// CHECK-LABEL: define nonnull %struct.B* @_Z1fR1D
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.B* @_Z1fR1D
 B &f(D &d) {
   // CHECK-NOT: load i8**
   return d;
 }

test/CodeGenCXX/dllexport-members.cpp

struct ExportSpecials {
   // M32-DAG: define dllexport x86_thiscallcc void @"\01??1ExportSpecials@@QAE@XZ"(%struct.ExportSpecials* %this)
   // M64-DAG: define dllexport                void @"\01??1ExportSpecials@@QEAA@XZ"(%struct.ExportSpecials* %this)
   // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsD1Ev(%struct.ExportSpecials* %this)
   // G64-DAG: define dllexport                void @_ZN14ExportSpecialsD1Ev(%struct.ExportSpecials* %this)
   // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsD2Ev(%struct.ExportSpecials* %this)
   // G64-DAG: define dllexport                void @_ZN14ExportSpecialsD2Ev(%struct.ExportSpecials* %this)
   __declspec(dllexport) ~ExportSpecials();
 
-  // M32-DAG: define dllexport x86_thiscallcc %struct.ExportSpecials* @"\01??0ExportSpecials@@QAE@ABU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* nonnull)
-  // M64-DAG: define dllexport                %struct.ExportSpecials* @"\01??0ExportSpecials@@QEAA@AEBU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC1ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC1ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC2ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC2ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
+  // M32-DAG: define dllexport x86_thiscallcc %struct.ExportSpecials* @"\01??0ExportSpecials@@QAE@ABU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: define dllexport                %struct.ExportSpecials* @"\01??0ExportSpecials@@QEAA@AEBU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC1ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC1ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC2ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC2ERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllexport) ExportSpecials(const ExportSpecials&);
 
-  // M32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportSpecials* @"\01??4ExportSpecials@@QAEAAU0@ABU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // M64-DAG: define dllexport                nonnull %struct.ExportSpecials* @"\01??4ExportSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportSpecials* @_ZN14ExportSpecialsaSERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                nonnull %struct.ExportSpecials* @_ZN14ExportSpecialsaSERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
+  // M32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @"\01??4ExportSpecials@@QAEAAU0@ABU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @"\01??4ExportSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @_ZN14ExportSpecialsaSERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @_ZN14ExportSpecialsaSERKS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllexport) ExportSpecials& operator=(const ExportSpecials&);
 
-  // M32-DAG: define dllexport x86_thiscallcc %struct.ExportSpecials* @"\01??0ExportSpecials@@QAE@$$QAU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* nonnull)
-  // M64-DAG: define dllexport                %struct.ExportSpecials* @"\01??0ExportSpecials@@QEAA@$$QEAU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC1EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC1EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC2EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC2EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
+  // M32-DAG: define dllexport x86_thiscallcc %struct.ExportSpecials* @"\01??0ExportSpecials@@QAE@$$QAU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: define dllexport                %struct.ExportSpecials* @"\01??0ExportSpecials@@QEAA@$$QEAU0@@Z"(%struct.ExportSpecials* returned %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC1EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC1EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc void @_ZN14ExportSpecialsC2EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                void @_ZN14ExportSpecialsC2EOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllexport) ExportSpecials(ExportSpecials&&);
 
-  // M32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportSpecials* @"\01??4ExportSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // M64-DAG: define dllexport                nonnull %struct.ExportSpecials* @"\01??4ExportSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportSpecials* @_ZN14ExportSpecialsaSEOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
-  // G64-DAG: define dllexport                nonnull %struct.ExportSpecials* @_ZN14ExportSpecialsaSEOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* nonnull)
+  // M32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @"\01??4ExportSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @"\01??4ExportSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @_ZN14ExportSpecialsaSEOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportSpecials* @_ZN14ExportSpecialsaSEOS_(%struct.ExportSpecials* %this, %struct.ExportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllexport) ExportSpecials& operator=(ExportSpecials&&);
 };
 ExportSpecials::ExportSpecials() {}
 ExportSpecials::~ExportSpecials() {}
 ExportSpecials::ExportSpecials(const ExportSpecials&) {}
 ExportSpecials& ExportSpecials::operator=(const ExportSpecials&) { return *this; }
 ExportSpecials::ExportSpecials(ExportSpecials&&) {}
 ExportSpecials& ExportSpecials::operator=(ExportSpecials&&) { return *this; }
struct ExportInlineSpecials {
   __declspec(dllexport) ~ExportInlineSpecials() {}
 
   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportInlineSpecials* @"\01??0ExportInlineSpecials@@QAE@ABU0@@Z"(
   // M64-DAG: define weak_odr dllexport                %struct.ExportInlineSpecials* @"\01??0ExportInlineSpecials@@QEAA@AEBU0@@Z"(
   // G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN20ExportInlineSpecialsC1ERKS_(
   // G64-DAG: define weak_odr dllexport                void @_ZN20ExportInlineSpecialsC1ERKS_(
   __declspec(dllexport) inline ExportInlineSpecials(const ExportInlineSpecials&);
 
-  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QAEAAU0@ABU0@@Z"(
-  // M64-DAG: define weak_odr dllexport                nonnull %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QEAAAEAU0@AEBU0@@Z"(
-  // G32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSERKS_(
-  // G64-DAG: define weak_odr dllexport                nonnull %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSERKS_(
+  // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QAEAAU0@ABU0@@Z"(
+  // M64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QEAAAEAU0@AEBU0@@Z"(
+  // G32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSERKS_(
+  // G64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSERKS_(
   __declspec(dllexport) ExportInlineSpecials& operator=(const ExportInlineSpecials&);
 
   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportInlineSpecials* @"\01??0ExportInlineSpecials@@QAE@$$QAU0@@Z"(
   // M64-DAG: define weak_odr dllexport                %struct.ExportInlineSpecials* @"\01??0ExportInlineSpecials@@QEAA@$$QEAU0@@Z"(
   // G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN20ExportInlineSpecialsC1EOS_(
   // G64-DAG: define weak_odr dllexport                void @_ZN20ExportInlineSpecialsC1EOS_(
   __declspec(dllexport) ExportInlineSpecials(ExportInlineSpecials&&) {}
 
-  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(
-  // M64-DAG: define weak_odr dllexport                nonnull %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QEAAAEAU0@$$QEAU0@@Z"(
-  // G32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSEOS_(
-  // G64-DAG: define weak_odr dllexport                nonnull %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSEOS_(
+  // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(
+  // M64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @"\01??4ExportInlineSpecials@@QEAAAEAU0@$$QEAU0@@Z"(
+  // G32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSEOS_(
+  // G64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportInlineSpecials* @_ZN20ExportInlineSpecialsaSEOS_(
   __declspec(dllexport) ExportInlineSpecials& operator=(ExportInlineSpecials&&) { return *this; }
 };
 ExportInlineSpecials::ExportInlineSpecials(const ExportInlineSpecials&) {}
 inline ExportInlineSpecials& ExportInlineSpecials::operator=(const ExportInlineSpecials&) { return *this; }
 
 
 // Export defaulted member function definitions.
 struct ExportDefaultedDefs {

 // M32-DAG: define dllexport x86_thiscallcc void @"\01??1ExportDefaultedDefs@@QAE@XZ"(%struct.ExportDefaultedDefs* %this)
 // M64-DAG: define dllexport                void @"\01??1ExportDefaultedDefs@@QEAA@XZ"(%struct.ExportDefaultedDefs* %this)
 // G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsD1Ev(%struct.ExportDefaultedDefs* %this)
 // G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsD1Ev(%struct.ExportDefaultedDefs* %this)
 // G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsD2Ev(%struct.ExportDefaultedDefs* %this)
 // G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsD2Ev(%struct.ExportDefaultedDefs* %this)
 ExportDefaultedDefs::~ExportDefaultedDefs() = default;
 
-// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* nonnull)
-// M64-DAG: define weak_odr dllexport                %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC1ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define weak_odr dllexport                void @_ZN19ExportDefaultedDefsC1ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC2ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define weak_odr dllexport                void @_ZN19ExportDefaultedDefsC2ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
+// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define weak_odr dllexport                %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC1ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define weak_odr dllexport                void @_ZN19ExportDefaultedDefsC1ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC2ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define weak_odr dllexport                void @_ZN19ExportDefaultedDefsC2ERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
 __declspec(dllexport) ExportDefaultedDefs::ExportDefaultedDefs(const ExportDefaultedDefs&) = default;
 
-// M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QAEAAU0@ABU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// M64-DAG: define weak_odr dllexport                nonnull %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define weak_odr dllexport                nonnull %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
+// M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QAEAAU0@ABU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define weak_odr dllexport                dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSERKS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
 inline ExportDefaultedDefs& ExportDefaultedDefs::operator=(const ExportDefaultedDefs&) = default;
 
-// M32-DAG: define dllexport x86_thiscallcc %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QAE@$$QAU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* nonnull)
-// M64-DAG: define dllexport                %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QEAA@$$QEAU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC1EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsC1EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC2EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsC2EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
+// M32-DAG: define dllexport x86_thiscallcc %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QAE@$$QAU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define dllexport                %struct.ExportDefaultedDefs* @"\01??0ExportDefaultedDefs@@QEAA@$$QEAU0@@Z"(%struct.ExportDefaultedDefs* returned %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC1EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsC1EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define dllexport x86_thiscallcc void @_ZN19ExportDefaultedDefsC2EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define dllexport                void @_ZN19ExportDefaultedDefsC2EOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
 __declspec(dllexport) ExportDefaultedDefs::ExportDefaultedDefs(ExportDefaultedDefs&&) = default;
 
-// M32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QAEAAU0@$$QAU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// M64-DAG: define dllexport                nonnull %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G32-DAG: define dllexport x86_thiscallcc nonnull %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSEOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
-// G64-DAG: define dllexport                nonnull %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSEOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* nonnull)
+// M32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QAEAAU0@$$QAU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @"\01??4ExportDefaultedDefs@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSEOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define dllexport                dereferenceable({{[0-9]+}}) %struct.ExportDefaultedDefs* @_ZN19ExportDefaultedDefsaSEOS_(%struct.ExportDefaultedDefs* %this, %struct.ExportDefaultedDefs* dereferenceable({{[0-9]+}}))
 ExportDefaultedDefs& ExportDefaultedDefs::operator=(ExportDefaultedDefs&&) = default;
 
 
 // Export allocation functions.
 struct ExportAlloc {
   __declspec(dllexport) void* operator new(__SIZE_TYPE__);
   __declspec(dllexport) void* operator new[](__SIZE_TYPE__);
   __declspec(dllexport) void operator delete(void*);

test/CodeGenCXX/dllexport.cpp

struct T {
     void __declspec(dllexport) a() {}
     // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@S@@QAEXXZ"
   };
 };
 
 
 struct __declspec(dllexport) T {
   // Copy assignment operator:
-  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.T* @"\01??4T@@QAEAAU0@ABU0@@Z"
+  // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"\01??4T@@QAEAAU0@ABU0@@Z"
 
   // Explicitly defaulted copy constructur:
   T(const T&) = default;
   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.T* @"\01??0T@@QAE@ABU0@@Z"
 
   void a() {}
   // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@@QAEXXZ"
 
   static int b;
   // M32-DAG: @"\01?b@T@@2HA" = external dllexport global i32
 
   static int c;
   // M32-DAG: @"\01?c@T@@2HA" = dllexport global i32 0, align 4
 };
 
 USEVAR(T::b)
 int T::c;
 
 template <typename T> struct __declspec(dllexport) U { void foo() {} };
 // The U<int> specialization below must cause the following to be emitted:
 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?foo@?$U@H@@QAEXXZ"
-// M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.U* @"\01??4?$U@H@@QAEAAU0@ABU0@@Z"
+// M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.U* @"\01??4?$U@H@@QAEAAU0@ABU0@@Z"
 struct __declspec(dllexport) V : public U<int> { };
 
 
 struct __declspec(dllexport) W { virtual void foo() {} };
 // Default ctor:
 // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@XZ"
 // Copy ctor:
 // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@ABU0@@Z"
 // vftable:
 // M32-DAG: [[W_VTABLE:@.*]] = private unnamed_addr constant [2 x i8*] [i8* bitcast (%rtti.CompleteObjectLocator* @"\01??_R4W@@6B@" to i8*), i8* bitcast (void (%struct.W*)* @"\01?foo@W@@UAEXXZ" to i8*)], comdat $"\01??_7W@@6B@"
 // M32-DAG: @"\01??_7W@@6B@" = dllexport unnamed_addr alias getelementptr inbounds ([2 x i8*]* [[W_VTABLE]], i32 0, i32 1)
 // G32-DAG: @_ZTV1W = weak_odr dllexport unnamed_addr constant [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1W to i8*), i8* bitcast (void (%struct.W*)* @_ZN1W3fooEv to i8*)]
 
 struct __declspec(dllexport) X : public virtual W {};
 // vbtable:
 // M32-DAG: @"\01??_8X@@7B@" = weak_odr dllexport unnamed_addr constant [2 x i32] [i32 0, i32 4]
 
 struct __declspec(dllexport) Y {
   // Move assignment operator:
-  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.Y* @"\01??4Y@@QAEAAU0@$$QAU0@@Z"
+  // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.Y* @"\01??4Y@@QAEAAU0@$$QAU0@@Z"
 
   int x;
 };
 
 struct __declspec(dllexport) Z { virtual ~Z() {} };
 // The scalar deleting dtor does not get exported:
 // M32-DAG: define linkonce_odr x86_thiscallcc void @"\01??_GZ@@UAEPAXI@Z"
 

test/CodeGenCXX/dllimport-members.cpp

struct ImportSpecials {
   __declspec(dllimport) ImportSpecials();
 
   // M32-DAG: declare dllimport x86_thiscallcc void @"\01??1ImportSpecials@@QAE@XZ"(%struct.ImportSpecials*)
   // M64-DAG: declare dllimport                void @"\01??1ImportSpecials@@QEAA@XZ"(%struct.ImportSpecials*)
   // G32-DAG: declare dllimport x86_thiscallcc void                    @_ZN14ImportSpecialsD1Ev(%struct.ImportSpecials*)
   // G64-DAG: declare dllimport                void                    @_ZN14ImportSpecialsD1Ev(%struct.ImportSpecials*)
   __declspec(dllimport) ~ImportSpecials();
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportSpecials* @"\01??0ImportSpecials@@QAE@ABU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportSpecials* @"\01??0ImportSpecials@@QEAA@AEBU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void                    @_ZN14ImportSpecialsC1ERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G64-DAG: declare dllimport                void                    @_ZN14ImportSpecialsC1ERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportSpecials* @"\01??0ImportSpecials@@QAE@ABU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportSpecials* @"\01??0ImportSpecials@@QEAA@AEBU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void                    @_ZN14ImportSpecialsC1ERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void                    @_ZN14ImportSpecialsC1ERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportSpecials(const ImportSpecials&);
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportSpecials* @"\01??4ImportSpecials@@QAEAAU0@ABU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportSpecials* @"\01??4ImportSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportSpecials* @_ZN14ImportSpecialsaSERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportSpecials* @_ZN14ImportSpecialsaSERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @"\01??4ImportSpecials@@QAEAAU0@ABU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @"\01??4ImportSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @_ZN14ImportSpecialsaSERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @_ZN14ImportSpecialsaSERKS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportSpecials& operator=(const ImportSpecials&);
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportSpecials* @"\01??0ImportSpecials@@QAE@$$QAU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportSpecials* @"\01??0ImportSpecials@@QEAA@$$QEAU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void                    @_ZN14ImportSpecialsC1EOS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G64-DAG: declare dllimport                void                    @_ZN14ImportSpecialsC1EOS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportSpecials* @"\01??0ImportSpecials@@QAE@$$QAU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportSpecials* @"\01??0ImportSpecials@@QEAA@$$QEAU0@@Z"(%struct.ImportSpecials* returned, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void                    @_ZN14ImportSpecialsC1EOS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void                    @_ZN14ImportSpecialsC1EOS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportSpecials(ImportSpecials&&);
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportSpecials* @"\01??4ImportSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportSpecials* @"\01??4ImportSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportSpecials* @_ZN14ImportSpecialsaSEOS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportSpecials* @_ZN14ImportSpecialsaSEOS_(%struct.ImportSpecials*, %struct.ImportSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @"\01??4ImportSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @"\01??4ImportSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @_ZN14ImportSpecialsaSEOS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportSpecials* @_ZN14ImportSpecialsaSEOS_(%struct.ImportSpecials*, %struct.ImportSpecials* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportSpecials& operator=(ImportSpecials&&);
 };
 USESPECIALS(ImportSpecials)
 
 
 // Export inline special member functions.
 struct ImportInlineSpecials {
   // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@XZ"(%struct.ImportInlineSpecials* returned)
   // M64-DAG: declare dllimport                %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QEAA@XZ"(%struct.ImportInlineSpecials* returned)
   // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1Ev(%struct.ImportInlineSpecials*)
   // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsC1Ev(%struct.ImportInlineSpecials*)
   // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@XZ"(
   // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1Ev(
   __declspec(dllimport) ImportInlineSpecials() {}
 
   // M32-DAG: declare dllimport x86_thiscallcc void @"\01??1ImportInlineSpecials@@QAE@XZ"(%struct.ImportInlineSpecials*)
   // M64-DAG: declare dllimport                void @"\01??1ImportInlineSpecials@@QEAA@XZ"(%struct.ImportInlineSpecials*)
   // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsD1Ev(%struct.ImportInlineSpecials*)
   // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsD1Ev(%struct.ImportInlineSpecials*)
   // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"\01??1ImportInlineSpecials@@QAE@XZ"(
   // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsD1Ev(
   __declspec(dllimport) ~ImportInlineSpecials() {}
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@ABU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QEAA@AEBU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1ERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsC1ERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@ABU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QEAA@AEBU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1ERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsC1ERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
   // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@ABU0@@Z"(
   // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1ERKS_(
   __declspec(dllimport) inline ImportInlineSpecials(const ImportInlineSpecials&);
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@ABU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@ABU0@@Z"(
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@ABU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@ABU0@@Z"(
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSERKS_(
   __declspec(dllimport) ImportInlineSpecials& operator=(const ImportInlineSpecials&);
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@$$QAU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QEAA@$$QEAU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1EOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsC1EOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@$$QAU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QEAA@$$QEAU0@@Z"(%struct.ImportInlineSpecials* returned, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1EOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void @_ZN20ImportInlineSpecialsC1EOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
   // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportInlineSpecials* @"\01??0ImportInlineSpecials@@QAE@$$QAU0@@Z"(
   // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN20ImportInlineSpecialsC1EOS_(
   __declspec(dllimport) ImportInlineSpecials(ImportInlineSpecials&&) {}
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(%struct.ImportInlineSpecials*, %struct.ImportInlineSpecials* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @"\01??4ImportInlineSpecials@@QAEAAU0@$$QAU0@@Z"(
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportInlineSpecials* @_ZN20ImportInlineSpecialsaSEOS_(
   __declspec(dllimport) ImportInlineSpecials& operator=(ImportInlineSpecials&&) { return *this; }
 };
 ImportInlineSpecials::ImportInlineSpecials(const ImportInlineSpecials&) {}
 inline ImportInlineSpecials& ImportInlineSpecials::operator=(const ImportInlineSpecials&) { return *this; }
 USESPECIALS(ImportInlineSpecials)
 
 
 // Import defaulted member functions.
struct ImportDefaulted {
   // M32-DAG: declare dllimport x86_thiscallcc void @"\01??1ImportDefaulted@@QAE@XZ"(%struct.ImportDefaulted*)
   // M64-DAG: declare dllimport                void @"\01??1ImportDefaulted@@QEAA@XZ"(%struct.ImportDefaulted*)
   // G32-DAG: declare dllimport x86_thiscallcc void @_ZN15ImportDefaultedD1Ev(%struct.ImportDefaulted*)
   // G64-DAG: declare dllimport                void @_ZN15ImportDefaultedD1Ev(%struct.ImportDefaulted*)
   // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"\01??1ImportDefaulted@@QAE@XZ"(%struct.ImportDefaulted* %this)
   // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN15ImportDefaultedD1Ev(%struct.ImportDefaulted* %this)
   __declspec(dllimport) ~ImportDefaulted() = default;
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@ABU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QEAA@AEBU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void                     @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G64-DAG: declare dllimport                void                     @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@ABU0@@Z"(%struct.ImportDefaulted* returned %this, %struct.ImportDefaulted* nonnull)
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@ABU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QEAA@AEBU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void                     @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void                     @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@ABU0@@Z"(%struct.ImportDefaulted* returned %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN15ImportDefaultedC1ERKS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportDefaulted(const ImportDefaulted&) = default;
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSERKS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportDefaulted& operator=(const ImportDefaulted&) = default;
 
-  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@$$QAU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* nonnull)
-  // M64-DAG: declare dllimport                %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QEAA@$$QEAU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc void                     @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G64-DAG: declare dllimport                void                     @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@$$QAU0@@Z"(%struct.ImportDefaulted* returned %this, %struct.ImportDefaulted* nonnull)
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@$$QAU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QEAA@$$QEAU0@@Z"(%struct.ImportDefaulted* returned, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc void                     @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                void                     @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc %struct.ImportDefaulted* @"\01??0ImportDefaulted@@QAE@$$QAU0@@Z"(%struct.ImportDefaulted* returned %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc void @_ZN15ImportDefaultedC1EOS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportDefaulted(ImportDefaulted&&) = default;
 
-  // M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // M64-DAG: declare dllimport                nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // G64-DAG: declare dllimport                nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* nonnull)
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
-  // GO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* nonnull)
+  // M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted*, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @"\01??4ImportDefaulted@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
+  // GO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaulted* @_ZN15ImportDefaultedaSEOS_(%struct.ImportDefaulted* %this, %struct.ImportDefaulted* dereferenceable({{[0-9]+}}))
   __declspec(dllimport) ImportDefaulted& operator=(ImportDefaulted&&) = default;
 
   ForceNonTrivial v; // ensure special members are non-trivial
 };
 USESPECIALS(ImportDefaulted)
 
 
 // Import defaulted member function definitions.

 __declspec(dllimport) ImportDefaultedDefs::ImportDefaultedDefs() = default;
 
 // M32-DAG: declare dllimport x86_thiscallcc void @"\01??1ImportDefaultedDefs@@QAE@XZ"(%struct.ImportDefaultedDefs*)
 // M64-DAG: declare dllimport                void @"\01??1ImportDefaultedDefs@@QEAA@XZ"(%struct.ImportDefaultedDefs*)
 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN19ImportDefaultedDefsD1Ev(%struct.ImportDefaultedDefs*)
 // G64-DAG: declare dllimport                void @_ZN19ImportDefaultedDefsD1Ev(%struct.ImportDefaultedDefs*)
 __declspec(dllimport) ImportDefaultedDefs::~ImportDefaultedDefs() = default;
 
-// M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QAE@ABU0@@Z"(%struct.ImportDefaultedDefs* returned, %struct.ImportDefaultedDefs* nonnull)
-// M64-DAG: declare dllimport                %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QEAA@AEBU0@@Z"(%struct.ImportDefaultedDefs* returned, %struct.ImportDefaultedDefs* nonnull)
-// G32-DAG: declare dllimport x86_thiscallcc void @_ZN19ImportDefaultedDefsC1ERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
-// G64-DAG: declare dllimport                void @_ZN19ImportDefaultedDefsC1ERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
+// M32-DAG: declare dllimport x86_thiscallcc %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QAE@ABU0@@Z"(%struct.ImportDefaultedDefs* returned, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: declare dllimport                %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QEAA@AEBU0@@Z"(%struct.ImportDefaultedDefs* returned, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: declare dllimport x86_thiscallcc void @_ZN19ImportDefaultedDefsC1ERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: declare dllimport                void @_ZN19ImportDefaultedDefsC1ERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
 inline ImportDefaultedDefs::ImportDefaultedDefs(const ImportDefaultedDefs&) = default;
 
-// M32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
-// M64-DAG: declare dllimport                nonnull %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
-// G32-DAG: declare dllimport x86_thiscallcc nonnull %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
-// G64-DAG: declare dllimport                nonnull %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* nonnull)
+// M32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QAEAAU0@ABU0@@Z"(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: declare dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: declare dllimport                dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSERKS_(%struct.ImportDefaultedDefs*, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
 inline ImportDefaultedDefs& ImportDefaultedDefs::operator=(const ImportDefaultedDefs&) = default;
 
-// M32-DAG: define x86_thiscallcc %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QAE@$$QAU0@@Z"(%struct.ImportDefaultedDefs* returned %this, %struct.ImportDefaultedDefs* nonnull)
-// M64-DAG: define                %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QEAA@$$QEAU0@@Z"(%struct.ImportDefaultedDefs* returned %this, %struct.ImportDefaultedDefs* nonnull)
-// G32-DAG: define x86_thiscallcc void @_ZN19ImportDefaultedDefsC1EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// G64-DAG: define                void @_ZN19ImportDefaultedDefsC1EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// G32-DAG: define x86_thiscallcc void @_ZN19ImportDefaultedDefsC2EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// G64-DAG: define                void @_ZN19ImportDefaultedDefsC2EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
+// M32-DAG: define x86_thiscallcc %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QAE@$$QAU0@@Z"(%struct.ImportDefaultedDefs* returned %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define                %struct.ImportDefaultedDefs* @"\01??0ImportDefaultedDefs@@QEAA@$$QEAU0@@Z"(%struct.ImportDefaultedDefs* returned %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define x86_thiscallcc void @_ZN19ImportDefaultedDefsC1EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define                void @_ZN19ImportDefaultedDefsC1EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define x86_thiscallcc void @_ZN19ImportDefaultedDefsC2EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define                void @_ZN19ImportDefaultedDefsC2EOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
 ImportDefaultedDefs::ImportDefaultedDefs(ImportDefaultedDefs&&) = default; // dllimport ignored
 
-// M32-DAG: define x86_thiscallcc nonnull %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// M64-DAG: define                nonnull %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// G32-DAG: define x86_thiscallcc nonnull %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSEOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
-// G64-DAG: define                nonnull %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSEOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* nonnull)
+// M32-DAG: define x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QAEAAU0@$$QAU0@@Z"(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// M64-DAG: define                dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @"\01??4ImportDefaultedDefs@@QEAAAEAU0@$$QEAU0@@Z"(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G32-DAG: define x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSEOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
+// G64-DAG: define                dereferenceable({{[0-9]+}}) %struct.ImportDefaultedDefs* @_ZN19ImportDefaultedDefsaSEOS_(%struct.ImportDefaultedDefs* %this, %struct.ImportDefaultedDefs* dereferenceable({{[0-9]+}}))
 ImportDefaultedDefs& ImportDefaultedDefs::operator=(ImportDefaultedDefs&&) = default; // dllimport ignored
 
 USESPECIALS(ImportDefaultedDefs)
 
 
 // Import allocation functions.
 struct ImportAlloc {
   __declspec(dllimport) void* operator new(__SIZE_TYPE__);

test/CodeGenCXX/dllimport.cpp

 struct __declspec(dllimport) T {
   void a() {}
   // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"\01?a@T@@QAEXXZ"
 
   static int b;
   // MO1-DAG: @"\01?b@T@@2HA" = external dllimport global i32
 
   T& operator=(T&) = default;
-  // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull %struct.T* @"\01??4T@@QAEAAU0@AAU0@@Z"
+  // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"\01??4T@@QAEAAU0@AAU0@@Z"
 
   T& operator=(T&&) = default;
   // Note: Don't mark inline move operators dllimport because current MSVC versions don't export them.
-  // MO1-DAG: define linkonce_odr x86_thiscallcc nonnull %struct.T* @"\01??4T@@QAEAAU0@$$QAU0@@Z"
+  // MO1-DAG: define linkonce_odr x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"\01??4T@@QAEAAU0@$$QAU0@@Z"
 };
 USEMEMFUNC(T, a)
 USEVAR(T::b)
 USECOPYASSIGN(T)
 USEMOVEASSIGN(T)
 
 template <typename T> struct __declspec(dllimport) U { void foo() {} };
 // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"\01?foo@?$U@H@@QAEXXZ"

test/CodeGenCXX/eh.cpp

void test2() {
   throw d2;
 }
 
 // CHECK-LABEL:     define void @_Z5test2v()
 // CHECK:       [[EXNVAR:%.*]] = alloca i8*
 // CHECK-NEXT:  [[SELECTORVAR:%.*]] = alloca i32
 // CHECK-NEXT:  [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 16)
 // CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
-// CHECK-NEXT:  invoke void @_ZN7test2_DC1ERKS_([[DSTAR]] [[EXN]], [[DSTAR]] nonnull @d2)
+// CHECK-NEXT:  invoke void @_ZN7test2_DC1ERKS_([[DSTAR]] [[EXN]], [[DSTAR]] dereferenceable({{[0-9]+}}) @d2)
 // CHECK-NEXT:     to label %[[CONT:.*]] unwind label %{{.*}}
 //      :     [[CONT]]:   (can't check this in Release-Asserts builds)
 // CHECK:       call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{.*}}* @_ZTI7test2_D to i8*), i8* null) [[NR]]
 // CHECK-NEXT:  unreachable
 
 
 struct test3_D {
   test3_D() { }
void bar() {
     // CHECK-NEXT: br i1 [[COND]],
 
     // CHECK:      [[EXN:%.*]] = call i8* @__cxa_allocate_exception(i64 4)
     // CHECK-NEXT: store i8* [[EXN]], i8** [[EXN_SAVE]]
     // CHECK-NEXT: store i1 true, i1* [[EXN_ACTIVE]]
     // CHECK-NEXT: [[T0:%.*]] = bitcast i8* [[EXN]] to [[B:%.*]]*
     // CHECK-NEXT: invoke void @_ZN6test161AC1Ev([[A]]* [[TEMP]])
     // CHECK:      store i1 true, i1* [[TEMP_ACTIVE]]
-    // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* nonnull [[TEMP]])
+    // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* dereferenceable({{[0-9]+}}) [[TEMP]])
     // CHECK:      store i1 false, i1* [[EXN_ACTIVE]]
     // CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXN]],
 
     // CHECK:      invoke void @_ZN6test163fooEv()
     // CHECK:      br label
 
     // CHECK:      invoke void @_ZN6test161AD1Ev([[A]]* [[TEMP]])
     // CHECK:      ret void

test/CodeGenCXX/empty-nontrivially-copyable.cpp

 
 bool foo(Empty e) {
 // CHECK: @_Z3foo5Empty(%struct.Empty* %e)
 // CHECK: call {{.*}} @_ZN5Empty5checkEv(%struct.Empty* %e)
   return e.check();
 }
 
 void caller(Empty &e) {
-// CHECK: @_Z6callerR5Empty(%struct.Empty* nonnull %e)
+// CHECK: @_Z6callerR5Empty(%struct.Empty* dereferenceable({{[0-9]+}}) %e)
 // CHECK: call {{.*}} @_ZN5EmptyC1ERKS_(%struct.Empty* [[NEWTMP:%.*]], %struct.Empty*
 // CHECK: call {{.*}} @_Z3foo5Empty(%struct.Empty* [[NEWTMP]])
   foo(e);
 }

test/CodeGenCXX/exceptions.cpp

namespace test5 {
   // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
   // CHECK-NEXT: [[A:%.*]] = alloca [[A_T:%.*]], align 1
   // CHECK-NEXT: [[T:%.*]] = alloca [[T_T:%.*]], align 1
   // CHECK-NEXT: invoke void @_ZN5test53fooEv()
   // CHECK:      [[EXN:%.*]] = load i8** [[EXNSLOT]]
   // CHECK-NEXT: [[ADJ:%.*]] = call i8* @__cxa_get_exception_ptr(i8* [[EXN]])
   // CHECK-NEXT: [[SRC:%.*]] = bitcast i8* [[ADJ]] to [[A_T]]*
   // CHECK-NEXT: invoke void @_ZN5test51TC1Ev([[T_T]]* [[T]])
-  // CHECK:      invoke void @_ZN5test51AC1ERKS0_RKNS_1TE([[A_T]]* [[A]], [[A_T]]* nonnull [[SRC]], [[T_T]]* nonnull [[T]])
+  // CHECK:      invoke void @_ZN5test51AC1ERKS0_RKNS_1TE([[A_T]]* [[A]], [[A_T]]* dereferenceable({{[0-9]+}}) [[SRC]], [[T_T]]* dereferenceable({{[0-9]+}}) [[T]])
   // CHECK:      invoke void @_ZN5test51TD1Ev([[T_T]]* [[T]])
   // CHECK:      call i8* @__cxa_begin_catch(i8* [[EXN]]) [[NUW]]
   // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A_T]]* [[A]])
   // CHECK:      call void @__cxa_end_catch()
   void test() {
     try {
       foo();
     } catch (A a) {

test/CodeGenCXX/fastcall.cpp

 // RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
 
 void __attribute__((fastcall)) foo1(int &y);
 void bar1(int &y) {
   // CHECK-LABEL: define void @_Z4bar1Ri
-  // CHECK: call x86_fastcallcc void @_Z4foo1Ri(i32* inreg nonnull %
+  // CHECK: call x86_fastcallcc void @_Z4foo1Ri(i32* inreg dereferenceable({{[0-9]+}}) %
   foo1(y);
 }
 
 struct S1 {
   int x;
   S1(const S1 &y);
 };
 
 void __attribute__((fastcall)) foo2(S1 a, int b);
 void bar2(S1 a, int b) {
   // CHECK-LABEL: define void @_Z4bar22S1i
   // CHECK: call x86_fastcallcc void @_Z4foo22S1i(%struct.S1* inreg %{{.*}}, i32 inreg %
   foo2(a, b);
 }

test/CodeGenCXX/goto.cpp

template<int X> int test(int x) {
     // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]
     // CHECK-NEXT: [[CLEANUPACTIVE:%.*]] = alloca i1
     // CHECK:      call void @_ZN5test01AC1Ev([[A]]* [[Y]])
     // CHECK-NEXT: invoke void @_ZN5test01AC1Ev([[A]]* [[Z]])
     // CHECK:      [[NEW:%.*]] = invoke noalias i8* @_Znwm(i64 1)
     // CHECK:      store i1 true, i1* [[CLEANUPACTIVE]]
     // CHECK:      [[NEWCAST:%.*]] = bitcast i8* [[NEW]] to [[V]]*
     // CHECK-NEXT: invoke void @_ZN5test01AC1Ev([[A]]* [[TMP]])
-    // CHECK:      invoke void @_ZN5test01VC1ERKNS_1AE([[V]]* [[NEWCAST]], [[A]]* nonnull [[TMP]])
+    // CHECK:      invoke void @_ZN5test01VC1ERKNS_1AE([[V]]* [[NEWCAST]], [[A]]* dereferenceable({{[0-9]+}}) [[TMP]])
     // CHECK:      store i1 false, i1* [[CLEANUPACTIVE]]
     // CHECK-NEXT: invoke void @_ZN5test01AD1Ev([[A]]* [[TMP]])
     A y;
     try {
       A z;
       V *v = new V();
 
       if (x) return 1;

test/CodeGenCXX/implicit-copy-assign-operator.cpp

struct D : A, B, virtual C {
 
   CopyByValue by_value;
 };
 
 void test_D(D d1, D d2) {
   d1 = d2;
 }
 
-// CHECK-LABEL: define linkonce_odr nonnull %struct.D* @_ZN1DaSERS_
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.D* @_ZN1DaSERS_
 // CHECK: {{call.*_ZN1AaSERS_}}
 // CHECK: {{call.*_ZN1BaSERS_}}
 // CHECK: {{call.*_ZN1CaSERKS_}}
 // CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 28}}
 // CHECK: {{call.*_ZN1BaSERS_}}
 // CHECK: br
 // CHECK: {{call.*_ZN1CaSERKS_}}
 // CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 288}}
 // CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 12}}
 // CHECK: call void @_ZN11CopyByValueC1ERKS_
 // CHECK: {{call.*_ZN11CopyByValueaSES_}}
 // CHECK: ret

test/CodeGenCXX/implicit-copy-constructor.cpp

union {
     float f[3];
   };
 };
 
 void f(D d) {
   D d2(d);
 }
 
-// CHECK-LABEL: define linkonce_odr void @_ZN1DC1ERS_(%struct.D* %this, %struct.D* nonnull) unnamed_addr
+// CHECK-LABEL: define linkonce_odr void @_ZN1DC1ERS_(%struct.D* %this, %struct.D* dereferenceable({{[0-9]+}})) unnamed_addr
 // CHECK: call void @_ZN1AC1Ev
 // CHECK: call void @_ZN1CC2ERS_1A
 // CHECK: call void @_ZN1AD1Ev
 // CHECK: call void @_ZN1AC2ERS_
 // CHECK: call void @_ZN1BC2ERS_
 // CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 28}}
 // CHECK: call void @_ZN1BC1ERS_
 // CHECK: br

test/CodeGenCXX/mangle-lambdas.cpp

 namespace PR12123 {
   struct A { virtual ~A(); } g;
   struct B {
     void f(const std::type_info& x = typeid([]()->A& { return g; }()));
     void h();
   };
   void B::h() { f(); }
 }
-// CHECK-LABEL: define linkonce_odr nonnull %"struct.PR12123::A"* @_ZZN7PR121231B1fERKSt9type_infoEd_NKUlvE_clEv
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %"struct.PR12123::A"* @_ZZN7PR121231B1fERKSt9type_infoEd_NKUlvE_clEv
 
 namespace PR12808 {
   template <typename> struct B {
     int a;
     template <typename L> constexpr B(L&& x) : a(x()) { }
   };
   template <typename> void b(int) {
     [&]{ (void)B<int>([&]{ return 1; }); }();

test/CodeGenCXX/mangle.cpp

struct Ops {
   Ops& operator+(const Ops&);
   Ops& operator-(const Ops&);
   Ops& operator&(const Ops&);
   Ops& operator*(const Ops&);
   
   void *v;
 };
 
-// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsplERKS_
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.Ops* @_ZN3OpsplERKS_
 Ops& Ops::operator+(const Ops&) { return *this; }
-// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsmiERKS_
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.Ops* @_ZN3OpsmiERKS_
 Ops& Ops::operator-(const Ops&) { return *this; }
-// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsanERKS_
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.Ops* @_ZN3OpsanERKS_
 Ops& Ops::operator&(const Ops&) { return *this; }
-// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsmlERKS_
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.Ops* @_ZN3OpsmlERKS_
 Ops& Ops::operator*(const Ops&) { return *this; }
 
 // PR5861
 namespace PR5861 {
 template<bool> class P;
 template<> class P<true> {};
 
 template<template <bool> class, bool>

test/CodeGenCXX/microsoft-abi-sret-and-byval.cpp

 // WIN64-LABEL: define void @"\01?call_small_arg_with_dtor@@YAXXZ"()
 // WIN64:   call %struct.SmallWithDtor* @"\01??0SmallWithDtor@@QEAA@XZ"
 // WIN64:   call void @"\01?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i32 %{{.*}})
 // WIN64:   call void @"\01??1SmallWithDtor@@QEAA@XZ"
 // WIN64:   ret void
 
 // Test that references aren't destroyed in the callee.
 void ref_small_arg_with_dtor(const SmallWithDtor &s) { }
-// WIN32: define void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"(%struct.SmallWithDtor* nonnull %s) {{.*}} {
+// WIN32: define void @"\01?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s) {{.*}} {
 // WIN32-NOT:   call x86_thiscallcc void @"\01??1SmallWithDtor@@QAE@XZ"
 // WIN32: }
-// WIN64-LABEL: define void @"\01?ref_small_arg_with_dtor@@YAXAEBUSmallWithDtor@@@Z"(%struct.SmallWithDtor* nonnull %s)
+// WIN64-LABEL: define void @"\01?ref_small_arg_with_dtor@@YAXAEBUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s)
 
 void big_arg_with_dtor(BigWithDtor s) {}
 // WIN64-LABEL: define void @"\01?big_arg_with_dtor@@YAXUBigWithDtor@@@Z"(%struct.BigWithDtor* %s)
 // WIN64:   call void @"\01??1BigWithDtor@@QEAA@XZ"
 // WIN64: }
 
 void call_big_arg_with_dtor() {
   big_arg_with_dtor(BigWithDtor());

test/CodeGenCXX/microsoft-abi-static-initializers.cpp

inline S &UnreachableStatic() {
   if (0) {
     static S s; // bit 1
     return s;
   }
   static S s; // bit 2
   return s;
 }
 
-// CHECK-LABEL: define linkonce_odr nonnull %struct.S* @"\01?UnreachableStatic@@YAAAUS@@XZ"()
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.S* @"\01?UnreachableStatic@@YAAAUS@@XZ"()
 // CHECK: and i32 {{.*}}, 2
 // CHECK: or i32 {{.*}}, 2
 // CHECK: ret
 
 inline S &getS() {
   static S TheS;
   return TheS;
 }
 
-// CHECK-LABEL: define linkonce_odr nonnull %struct.S* @"\01?getS@@YAAAUS@@XZ"
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.S* @"\01?getS@@YAAAUS@@XZ"
 // CHECK: load i32* @"\01??_B?1??getS@@YAAAUS@@XZ@51"
 // CHECK: and i32 {{.*}}, 1
 // CHECK: icmp ne i32 {{.*}}, 0
 // CHECK: br i1
 //   init:
 // CHECK: or i32 {{.*}}, 1
 // CHECK: store i32 {{.*}}, i32* @"\01??_B?1??getS@@YAAAUS@@XZ@51"
 // CHECK: call x86_thiscallcc %struct.S* @"\01??0S@@QAE@XZ"(%struct.S* @"\01?TheS@?1??getS@@YAAAUS@@XZ@4U2@A")

test/CodeGenCXX/nrvo.cpp

 
 // rdar://problem/10430868
 // CHECK-LABEL: define void @_Z5test6v
 X test6() {
   X a __attribute__((aligned(8)));
   return a;
   // CHECK:      [[A:%.*]] = alloca [[X:%.*]], align 8
   // CHECK-NEXT: call {{.*}} @_ZN1XC1Ev([[X]]* [[A]])
-  // CHECK-NEXT: call {{.*}} @_ZN1XC1ERKS_([[X]]* {{%.*}}, [[X]]* nonnull [[A]])
+  // CHECK-NEXT: call {{.*}} @_ZN1XC1ERKS_([[X]]* {{%.*}}, [[X]]* dereferenceable({{[0-9]+}}) [[A]])
   // CHECK-NEXT: call {{.*}} @_ZN1XD1Ev([[X]]* [[A]])
   // CHECK-NEXT: ret void
 }
 
 // CHECK-LABEL: define void @_Z5test7b
 X test7(bool b) {
   // CHECK: tail call {{.*}} @_ZN1XC1Ev
   // CHECK-NEXT: ret

test/CodeGenCXX/pod-member-memcpys.cpp

 CALL_AO(PODLikeMember)
 CALL_AO(ArrayMember)
 CALL_AO(VolatileMember)
 CALL_AO(BitfieldMember)
 CALL_AO(InnerClassMember)
 CALL_AO(PackedMembers)
 
 // Basic copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.Basic* @_ZN5BasicaSERKS_(%struct.Basic* %this, %struct.Basic* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.Basic* @_ZN5BasicaSERKS_(%struct.Basic* %this, %struct.Basic* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret %struct.Basic*
 
 // PODMember copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.PODMember* @_ZN9PODMemberaSERKS_(%struct.PODMember* %this, %struct.PODMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.PODMember* @_ZN9PODMemberaSERKS_(%struct.PODMember* %this, %struct.PODMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret %struct.PODMember*
 
 // PODLikeMember copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.PODLikeMember* @_ZN13PODLikeMemberaSERKS_(%struct.PODLikeMember* %this, %struct.PODLikeMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.PODLikeMember* @_ZN13PODLikeMemberaSERKS_(%struct.PODLikeMember* %this, %struct.PODLikeMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret %struct.PODLikeMember*
 
 // ArrayMember copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.ArrayMember* @_ZN11ArrayMemberaSERKS_(%struct.ArrayMember* %this, %struct.ArrayMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.ArrayMember* @_ZN11ArrayMemberaSERKS_(%struct.ArrayMember* %this, %struct.ArrayMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 64, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 64, i32 4{{.*}})
 // CHECK: ret %struct.ArrayMember*
 
 // VolatileMember copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.VolatileMember* @_ZN14VolatileMemberaSERKS_(%struct.VolatileMember* %this, %struct.VolatileMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.VolatileMember* @_ZN14VolatileMemberaSERKS_(%struct.VolatileMember* %this, %struct.VolatileMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: load volatile i32* {{.*}}, align 4
 // CHECK: store volatile i32 {{.*}}, align 4
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret %struct.VolatileMember*
 
 // BitfieldMember copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.BitfieldMember* @_ZN14BitfieldMemberaSERKS_(%struct.BitfieldMember* %this, %struct.BitfieldMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.BitfieldMember* @_ZN14BitfieldMemberaSERKS_(%struct.BitfieldMember* %this, %struct.BitfieldMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 3, i32 1{{.*}})
 // CHECK: ret %struct.BitfieldMember*
 
 // InnerClass copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.InnerClassMember* @_ZN16InnerClassMemberaSERKS_(%struct.InnerClassMember* %this, %struct.InnerClassMember* nonnull)
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.InnerClassMember* @_ZN16InnerClassMemberaSERKS_(%struct.InnerClassMember* %this, %struct.InnerClassMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret %struct.InnerClassMember*
 
 // PackedMembers copy-assignment:
-// CHECK-LABEL: define linkonce_odr nonnull %struct.PackedMembers* @_ZN13PackedMembersaSERKS_(%struct.PackedMembers* %this, %struct.PackedMembers* nonnull)
-// CHECK: call nonnull %struct.NonPOD* @_ZN6NonPODaSERKS_
+// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.PackedMembers* @_ZN13PackedMembersaSERKS_(%struct.PackedMembers* %this, %struct.PackedMembers* dereferenceable({{[0-9]+}}))
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.NonPOD* @_ZN6NonPODaSERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 1{{.*}})
 // CHECK: ret %struct.PackedMembers*
 
 // COPY-CONSTRUCTORS:
 
 // Clang outputs copy-constructors in the reverse of the order that
 // copy-constructor calls are encountered. Add functions that call the copy
 // constructors of the classes above in reverse order here.
 
 #define CALL_CC(T) T callCC##T(const T& b) { return b; }
 
 CALL_CC(PackedMembers)
 CALL_CC(BitfieldMember2)
 CALL_CC(ReferenceMember)
 CALL_CC(InnerClassMember)
 CALL_CC(BitfieldMember)
 CALL_CC(VolatileMember)
 CALL_CC(ArrayMember)
 CALL_CC(PODLikeMember)
 CALL_CC(PODMember)
 CALL_CC(Basic)
 
 // Basic copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN5BasicC2ERKS_(%struct.Basic* %this, %struct.Basic* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN5BasicC2ERKS_(%struct.Basic* %this, %struct.Basic* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret void
 
 // PODMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN9PODMemberC2ERKS_(%struct.PODMember* %this, %struct.PODMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN9PODMemberC2ERKS_(%struct.PODMember* %this, %struct.PODMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret void
 
 // PODLikeMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN13PODLikeMemberC2ERKS_(%struct.PODLikeMember* %this, %struct.PODLikeMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN13PODLikeMemberC2ERKS_(%struct.PODLikeMember* %this, %struct.PODLikeMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
 // CHECK: invoke void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret void
 // CHECK: landingpad
 // CHECK: invoke void @_ZN7PODLikeD1Ev
 
 // ArrayMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN11ArrayMemberC2ERKS_(%struct.ArrayMember* %this, %struct.ArrayMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN11ArrayMemberC2ERKS_(%struct.ArrayMember* %this, %struct.ArrayMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 64, i32 4{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 64, i32 4{{.*}})
 // CHECK: ret void
 
 // VolatileMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN14VolatileMemberC2ERKS_(%struct.VolatileMember* %this, %struct.VolatileMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN14VolatileMemberC2ERKS_(%struct.VolatileMember* %this, %struct.VolatileMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: load volatile i32* {{.*}}, align 4
 // CHECK: store volatile i32 {{.*}}, align 4
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret void
 
 // BitfieldMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN14BitfieldMemberC2ERKS_(%struct.BitfieldMember* %this, %struct.BitfieldMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN14BitfieldMemberC2ERKS_(%struct.BitfieldMember* %this, %struct.BitfieldMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 3, i32 1{{.*}})
 // CHECK: ret void
 
 // InnerClass copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN16InnerClassMemberC2ERKS_(%struct.InnerClassMember* %this, %struct.InnerClassMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN16InnerClassMemberC2ERKS_(%struct.InnerClassMember* %this, %struct.InnerClassMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 32, i32 4{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4{{.*}})
 // CHECK: ret void
 
 // ReferenceMember copy-constructor:
-// CHECK-LABEL: define linkonce_odr void @_ZN15ReferenceMemberC2ERKS_(%struct.ReferenceMember* %this, %struct.ReferenceMember* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN15ReferenceMemberC2ERKS_(%struct.ReferenceMember* %this, %struct.ReferenceMember* dereferenceable({{[0-9]+}}))
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 8{{.*}})
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 8{{.*}})
 // CHECK: ret void
 
 // BitfieldMember2 copy-constructor:
-// CHECK-2-LABEL: define linkonce_odr void @_ZN15BitfieldMember2C2ERKS_(%struct.BitfieldMember2* %this, %struct.BitfieldMember2* nonnull)
+// CHECK-2-LABEL: define linkonce_odr void @_ZN15BitfieldMember2C2ERKS_(%struct.BitfieldMember2* %this, %struct.BitfieldMember2* dereferenceable({{[0-9]+}}))
 // CHECK-2: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 4, i1 false)
 // CHECK-2: call void @_ZN6NonPODC1ERKS_
 // CHECK-2: ret void
 
 // PackedMembers copy-assignment:
-// CHECK-LABEL: define linkonce_odr void @_ZN13PackedMembersC2ERKS_(%struct.PackedMembers* %this, %struct.PackedMembers* nonnull)
+// CHECK-LABEL: define linkonce_odr void @_ZN13PackedMembersC2ERKS_(%struct.PackedMembers* %this, %struct.PackedMembers* dereferenceable({{[0-9]+}}))
 // CHECK: call void @_ZN6NonPODC1ERKS_
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 16, i32 1{{.*}})
 // CHECK: ret void

test/CodeGenCXX/pointers-to-data-members.cpp

 
 }
 
 namespace BoolPtrToMember {
   struct X {
     bool member;
   };
 
-  // CHECK-LABEL: define nonnull i8* @_ZN15BoolPtrToMember1fERNS_1XEMS0_b
+  // CHECK-LABEL: define dereferenceable({{[0-9]+}}) i8* @_ZN15BoolPtrToMember1fERNS_1XEMS0_b
   bool &f(X &x, bool X::*member) {
     // CHECK: {{bitcast.* to i8\*}}
     // CHECK-NEXT: getelementptr inbounds i8*
     // CHECK-NEXT: ret i8*
     return x.*member;
   }
 }
 

test/CodeGenCXX/reference-cast.cpp

 // RUN: %clang_cc1 -emit-llvm -triple x86_64-apple-darwin10 -o - %s | FileCheck %s
 
 // PR6024
 extern int i;
 
-// CHECK: define nonnull i32* @_Z16lvalue_noop_castv() [[NUW:#[0-9]+]]
+// CHECK: define dereferenceable({{[0-9]+}}) i32* @_Z16lvalue_noop_castv() [[NUW:#[0-9]+]]
 const int &lvalue_noop_cast() {
   if (i == 0)
     // CHECK: store i32 17, i32*
     return (const int&)17;
   else if (i == 1)
     // CHECK: store i32 17, i32*
     return static_cast<const int&>(17);
     // CHECK: store i32 17, i32*
   return 17;
 }
 
-// CHECK-LABEL: define nonnull i16* @_Z20lvalue_integral_castv() 
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i16* @_Z20lvalue_integral_castv() 
 const short &lvalue_integral_cast() {
   if (i == 0)
     // CHECK: store i16 17, i16*
     return (const short&)17;
   else if (i == 1)
     // CHECK: store i16 17, i16*
     return static_cast<const short&>(17);
   // CHECK: store i16 17, i16*
   return 17;
 }
 
-// CHECK-LABEL: define nonnull i16* @_Z29lvalue_floating_integral_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i16* @_Z29lvalue_floating_integral_castv()
 const short &lvalue_floating_integral_cast() {
   if (i == 0)
     // CHECK: store i16 17, i16*
     return (const short&)17.5;
   else if (i == 1)
     // CHECK: store i16 17, i16*
     return static_cast<const short&>(17.5);
   // CHECK: store i16 17, i16*
   return 17.5;
 }
 
-// CHECK-LABEL: define nonnull float* @_Z29lvalue_integral_floating_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) float* @_Z29lvalue_integral_floating_castv()
 const float &lvalue_integral_floating_cast() {
   if (i == 0)
     // CHECK: store float 1.700000e+{{0*}}1, float*
     return (const float&)17;
   else if (i == 1)
     // CHECK: store float 1.700000e+{{0*}}1, float*
     return static_cast<const float&>(17);
   // CHECK: store float 1.700000e+{{0*}}1, float*
   return 17;
 }
 
-// CHECK-LABEL: define nonnull float* @_Z20lvalue_floating_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) float* @_Z20lvalue_floating_castv()
 const float &lvalue_floating_cast() {
   if (i == 0)
     // CHECK: store float 1.700000e+{{0*}}1, float*
     return (const float&)17.0;
   else if (i == 1)
     // CHECK: store float 1.700000e+{{0*}}1, float*
     return static_cast<const float&>(17.0);
   // CHECK: store float 1.700000e+{{0*}}1, float*
   return 17.0;
 }
 
 int get_int();
 
-// CHECK-LABEL: define nonnull i8* @_Z24lvalue_integer_bool_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i8* @_Z24lvalue_integer_bool_castv()
 const bool &lvalue_integer_bool_cast() {
   if (i == 0)
     // CHECK: call i32 @_Z7get_intv()
     // CHECK: store i8
     return (const bool&)get_int();
   else if (i == 1)
     // CHECK: call i32 @_Z7get_intv()
     // CHECK: store i8
     return static_cast<const bool&>(get_int());
   // CHECK: call i32 @_Z7get_intv()
   // CHECK: store i8
   return get_int();
 }
 
 float get_float();
 
-// CHECK-LABEL: define nonnull i8* @_Z25lvalue_floating_bool_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i8* @_Z25lvalue_floating_bool_castv()
 const bool &lvalue_floating_bool_cast() {
   if (i == 0)
     // CHECK: call float @_Z9get_floatv()
     // CHECK: fcmp une float
     // CHECK: store i8
     return (const bool&)get_float();
   else if (i == 1)
     // CHECK: call float @_Z9get_floatv()
     // CHECK: fcmp une float
     // CHECK: store i8
     return static_cast<const bool&>(get_float());
   // CHECK: call float @_Z9get_floatv()
   // CHECK: fcmp une float
   // CHECK: store i8
   return get_float();
 }
 
 struct X { };
 typedef int X::*pm;
 typedef int (X::*pmf)(int);
 
 pm get_pointer_to_member_data();
 pmf get_pointer_to_member_function();
 
-// CHECK-LABEL: define nonnull i8* @_Z26lvalue_ptrmem_to_bool_castv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i8* @_Z26lvalue_ptrmem_to_bool_castv()
 const bool &lvalue_ptrmem_to_bool_cast() {
   if (i == 0)
     // CHECK: call i64 @_Z26get_pointer_to_member_datav()
     // CHECK: store i8
     // CHECK: store i8*
     return (const bool&)get_pointer_to_member_data();
   else if (i == 1)
     // CHECK: call i64 @_Z26get_pointer_to_member_datav()
     // CHECK: store i8
     // CHECK: store i8*
     return static_cast<const bool&>(get_pointer_to_member_data());
   // CHECK: call i64 @_Z26get_pointer_to_member_datav()
   // CHECK: store i8
   // CHECK: store i8*
   return get_pointer_to_member_data();
 }
 
-// CHECK-LABEL: define nonnull i8* @_Z27lvalue_ptrmem_to_bool_cast2v
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i8* @_Z27lvalue_ptrmem_to_bool_cast2v
 const bool &lvalue_ptrmem_to_bool_cast2() {
   if (i == 0)
     // CHECK: {{call.*_Z30get_pointer_to_member_functionv}}
     // CHECK: store i8
     // CHECK: store i8*
     return (const bool&)get_pointer_to_member_function();
   else if (i == 1)
     // CHECK: {{call.*_Z30get_pointer_to_member_functionv}}

test/CodeGenCXX/rvalue-references.cpp

 // RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s | FileCheck %s
 
 
 struct Spacer { int x; };
 struct A { double array[2]; };
 struct B : Spacer, A { };
 
 B &getB();
 
-// CHECK-LABEL: define nonnull %struct.A* @_Z4getAv()
-// CHECK: call nonnull %struct.B* @_Z4getBv()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.A* @_Z4getAv()
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.B* @_Z4getBv()
 // CHECK-NEXT: bitcast %struct.B*
 // CHECK-NEXT: getelementptr inbounds i8*
 // CHECK-NEXT: bitcast i8* {{.*}} to %struct.A*
 // CHECK-NEXT: ret %struct.A*
 A &&getA() { return static_cast<A&&>(getB()); }
 
 int &getIntLValue();
 int &&getIntXValue();
 int getIntPRValue();
 
-// CHECK-LABEL: define nonnull i32* @_Z2f0v()
-// CHECK: call nonnull i32* @_Z12getIntLValuev()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i32* @_Z2f0v()
+// CHECK: call dereferenceable({{[0-9]+}}) i32* @_Z12getIntLValuev()
 // CHECK-NEXT: ret i32*
 int &&f0() { return static_cast<int&&>(getIntLValue()); }
 
-// CHECK-LABEL: define nonnull i32* @_Z2f1v()
-// CHECK: call nonnull i32* @_Z12getIntXValuev()
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i32* @_Z2f1v()
+// CHECK: call dereferenceable({{[0-9]+}}) i32* @_Z12getIntXValuev()
 // CHECK-NEXT: ret i32*
 int &&f1() { return static_cast<int&&>(getIntXValue()); }
 
-// CHECK-LABEL: define nonnull i32* @_Z2f2v
+// CHECK-LABEL: define dereferenceable({{[0-9]+}}) i32* @_Z2f2v
 // CHECK: call i32 @_Z13getIntPRValuev()
 // CHECK-NEXT: store i32 {{.*}}, i32*
 // CHECK-NEXT: ret i32*
 int &&f2() { return static_cast<int&&>(getIntPRValue()); }
 
 bool ok;
 
 class C
namespace test1 {
 
   struct A { A(int); };
   struct B {
     A a;
     B(int i);
   };
 
   // CHECK-LABEL:    define void @_ZN5test11BC2Ei(
-  // CHECK:      [[T0:%.*]] = call nonnull i32* @_ZN5test14moveERi(
+  // CHECK:      [[T0:%.*]] = call dereferenceable({{[0-9]+}}) i32* @_ZN5test14moveERi(
   // CHECK-NEXT: [[T1:%.*]] = load i32* [[T0]]
   // CHECK-NEXT: call void @_ZN5test11AC1Ei({{.*}}, i32 [[T1]])
   // CHECK-NEXT: ret void
   B::B(int i) : a(move(i)) {}
 }
 
 // PR11009
 struct MoveConvertible {
   operator int&& () const;
 };
 void moveConstruct() {
   (void)(int)MoveConvertible();
 }

test/CodeGenCXX/temporaries.cpp

 };
 
 int& f(int);
 
 // CHECK-LABEL: define void @_ZN3T121gEv
 void g() {
   // CHECK: call void @_ZN3T121AC1Ev
   // CHECK-NEXT: call i32 @_ZN3T121A1fEv(
-  // CHECK-NEXT: call nonnull i32* @_ZN3T121fEi(
+  // CHECK-NEXT: call dereferenceable({{[0-9]+}}) i32* @_ZN3T121fEi(
   // CHECK-NEXT: call void @_ZN3T121AD1Ev(
   int& i = f(A().f());
 }
 
 }
 
 namespace PR6648 {
   struct B {
namespace Elision {
 
 
   // CHECK-LABEL: define void @_ZN7Elision5test1EbNS_1AE(
   void test1(bool c, A x) {
     // CHECK:      [[I:%.*]] = alloca [[A]], align 8
     // CHECK-NEXT: [[J:%.*]] = alloca [[A]], align 8
 
     // CHECK:      call void @_ZN7Elision1AC1Ev([[A]]* [[I]])
-    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[I]], [[A]]* nonnull [[X:%.*]])
+    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[I]], [[A]]* dereferenceable({{[0-9]+}}) [[X:%.*]])
     A i = (c ? A() : x);
 
-    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[J]], [[A]]* nonnull [[X]])
+    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[J]], [[A]]* dereferenceable({{[0-9]+}}) [[X]])
     // CHECK:      call void @_ZN7Elision1AC1Ev([[A]]* [[J]])
     A j = (c ? x : A());
 
     // CHECK:      call void @_ZN7Elision1AD1Ev([[A]]* [[J]])
     // CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[I]])
   }
 
   // CHECK: define void @_ZN7Elision5test2Ev([[A]]* noalias sret
   A test2() {
     // CHECK:      call void @_ZN7Elision3fooEv()
     // CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[RET:%.*]])
     // CHECK-NEXT: ret void
     return (foo(), A());
   }
 
   // CHECK: define void @_ZN7Elision5test3EiNS_1AE([[A]]* noalias sret
   A test3(int v, A x) {
     if (v < 5)
     // CHECK:      call void @_ZN7Elision1AC1Ev([[A]]* [[RET:%.*]])
-    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* nonnull [[X:%.*]])
+    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* dereferenceable({{[0-9]+}}) [[X:%.*]])
       return (v < 0 ? A() : x);
     else
-    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* nonnull [[X]])
+    // CHECK:      call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* dereferenceable({{[0-9]+}}) [[X]])
     // CHECK:      call void @_ZN7Elision1AC1Ev([[A]]* [[RET]])
       return (v > 10 ? x : A());
 
     // CHECK:      ret void
   }
 
   // CHECK-LABEL: define void @_ZN7Elision5test4Ev()
   void test4() {
     // CHECK:      [[X:%.*]] = alloca [[A]], align 8
     // CHECK-NEXT: [[XS:%.*]] = alloca [2 x [[A]]], align 16
 
     // CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[X]])
     A x;
 
     // CHECK-NEXT: [[XS0:%.*]] = getelementptr inbounds [2 x [[A]]]* [[XS]], i64 0, i64 0
     // CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[XS0]])
     // CHECK-NEXT: [[XS1:%.*]] = getelementptr inbounds [[A]]* [[XS0]], i64 1
-    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[XS1]], [[A]]* nonnull [[X]])
+    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[XS1]], [[A]]* dereferenceable({{[0-9]+}}) [[X]])
     A xs[] = { A(), x };
 
     // CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [2 x [[A]]]* [[XS]], i32 0, i32 0
     // CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 2
     // CHECK-NEXT: br label
     // CHECK:      [[AFTER:%.*]] = phi [[A]]*
     // CHECK-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[AFTER]], i64 -1
     // CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[CUR]])
A test5() {
     // CHECK:      [[AT0:%.*]] = alloca [[A]], align 8
     // CHECK-NEXT: [[BT0:%.*]] = alloca [[B:%.*]], align 8
     // CHECK-NEXT: [[X:%.*]] = alloca [[A]], align 8
     // CHECK-NEXT: [[BT1:%.*]] = alloca [[B]], align 8
     // CHECK-NEXT: [[BT2:%.*]] = alloca [[B]], align 8
 
     // CHECK:      call void @_ZN7Elision1BC1Ev([[B]]* [[BT0]])
     // CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT0]], i32 0, i32 0
-    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[AT0]], [[A]]* nonnull [[AM]])
+    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[AT0]], [[A]]* dereferenceable({{[0-9]+}}) [[AM]])
     // CHECK-NEXT: call void @_ZN7Elision5takeAENS_1AE([[A]]* [[AT0]])
     // CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[AT0]])
     // CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT0]])
     takeA(B().a);
 
     // CHECK-NEXT: call void @_ZN7Elision1BC1Ev([[B]]* [[BT1]])
     // CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT1]], i32 0, i32 0
-    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[X]], [[A]]* nonnull [[AM]])
+    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[X]], [[A]]* dereferenceable({{[0-9]+}}) [[AM]])
     // CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT1]])
     A x = B().a;
 
     // CHECK-NEXT: call void @_ZN7Elision1BC1Ev([[B]]* [[BT2]])
     // CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT2]], i32 0, i32 0
-    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET:%.*]], [[A]]* nonnull [[AM]])
+    // CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET:%.*]], [[A]]* dereferenceable({{[0-9]+}}) [[AM]])
     // CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT2]])
     return B().a;
 
     // CHECK:      call void @_ZN7Elision1AD1Ev([[A]]* [[X]])
   }
 
   // Reduced from webkit.
   // CHECK: define void @_ZN7Elision5test6EPKNS_1CE([[C:%.*]]*

test/CodeGenCXX/throw-expressions.cpp

void test7(bool cond) {
   // x.false:
   // CHECK: br label
   //
   // end:
   // CHECK: ret void
   cond ? throw test7 : val;
 }
 
-// CHECK-LABEL: define nonnull i32* @_Z5test8b(
+// CHECK-LABEL: define dereferenceable(4) i32* @_Z5test8b(
 int &test8(bool cond) {
   // CHECK: br i1
   //
   // x.true:
   // CHECK: br label
   //
   // x.false:
   // CHECK: call void @__cxa_throw(
   // CHECK-NEXT: unreachable
   //
   // end:
   // CHECK: ret i32* @val
   return cond ? val : ((throw "foo"));
 }

test/CodeGenCXX/volatile.cpp

namespace test0 {
   };
 
   volatile A *array;
 
   // CHECK-LABEL: define void @_ZN5test04testENS_1AE(
   void test(A t) {
     // CHECK:      [[ARR:%.*]] = load [[A:%.*]]** @_ZN5test05arrayE, align 8
     // CHECK-NEXT: [[IDX:%.*]] = getelementptr inbounds [[A]]* [[ARR]], i64 0
-    // CHECK-NEXT: [[TMP:%.*]] = call nonnull [[A]]* @_ZNV5test01AaSERVKS0_([[A]]* [[IDX]], [[A]]* nonnull [[T:%.*]])
+    // CHECK-NEXT: [[TMP:%.*]] = call dereferenceable({{[0-9]+}}) [[A]]* @_ZNV5test01AaSERVKS0_([[A]]* [[IDX]], [[A]]* dereferenceable({{[0-9]+}}) [[T:%.*]])
     // CHECK-NEXT: ret void
     array[0] = t;
   }
 }
 
 namespace test1 {
   volatile int *x;
 
   // CHECK-LABEL: define void @_ZN5test14testEv()
   void test() {
     // CHECK:      [[TMP:%.*]] = load i32** @_ZN5test11xE, align 8
     // CHECK-NEXT: ret void
     *x;
   }
 }

test/CodeGenObjC/return-objc-object.mm

 
 NSOperationQueue &f();
 NSOperationQueue<P1> &f1();
 
 void call_once() {
   f();
   f1();
 }
-// CHECK: call nonnull %0* @_Z1fv()
-// CHECK: call nonnull %0* @_Z2f1v()  
+// CHECK: call dereferenceable({{[0-9]+}}) %0* @_Z1fv()
+// CHECK: call dereferenceable({{[0-9]+}}) %0* @_Z2f1v()  

test/CodeGenObjCXX/arc-blocks.mm

namespace test0 {
   // CHECK-NEXT: ret void
 
   // CHECK:    define internal void [[COPY_HELPER]](
   // CHECK:      [[T0:%.*]] = bitcast i8* {{.*}} to [[BYREF_A]]*
   // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_A]]* [[T0]], i32 0, i32 7
   // CHECK-NEXT: load
   // CHECK-NEXT: [[T2:%.*]] = bitcast i8* {{.*}} to [[BYREF_A]]*
   // CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds [[BYREF_A]]* [[T2]], i32 0, i32 7
-  // CHECK-NEXT: call void @_ZN5test01AC1ERKS0_([[A]]* [[T1]], [[A]]* nonnull [[T3]])
+  // CHECK-NEXT: call void @_ZN5test01AC1ERKS0_([[A]]* [[T1]], [[A]]* dereferenceable({{[0-9]+}}) [[T3]])
   // CHECK-NEXT: ret void
 
   // CHECK:    define internal void [[DISPOSE_HELPER]](
   // CHECK:      [[T0:%.*]] = bitcast i8* {{.*}} to [[BYREF_A]]*
   // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_A]]* [[T0]], i32 0, i32 7
   // CHECK-NEXT: call void @_ZN5test01AD1Ev([[A]]* [[T1]])
   // CHECK-NEXT: ret void
 }

test/CodeGenObjCXX/arc-move.mm

 
 template<typename T> 
 typename remove_reference<T>::type&& move(T &&x) { 
   return static_cast<typename remove_reference<T>::type&&>(x); 
 }
 
 // CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_objectS2_
 void library_move(__strong id &x, __strong id &y) {
-  // CHECK: call nonnull i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
+  // CHECK: call dereferenceable({{[0-9]+}}) i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
   // CHECK: load i8**
   // CHECK: store i8* null, i8**
   // CHECK: load i8***
   // CHECK-NEXT: load i8**
   // CHECK-NEXT: store i8*
   // CHECK-NEXT: call void @objc_release
   // CHECK-NEXT: ret void
   x = move(y);
 }
 
 // CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_object
 void library_move(__strong id &y) {
-  // CHECK: [[Y:%[a-zA-Z0-9]+]] = call nonnull i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
+  // CHECK: [[Y:%[a-zA-Z0-9]+]] = call dereferenceable({{[0-9]+}}) i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
   // Load the object
   // CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8** [[Y]]
   // Null out y
   // CHECK-NEXT: store i8* null, i8** [[Y]]
   // Initialize x with the object
   // CHECK-NEXT: store i8* [[OBJ]], i8** [[X:%[a-zA-Z0-9]+]]
   id x = move(y);
 
   // CHECK-NEXT: store i32 17
   int i = 17;
   // CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8** [[X]]
   // CHECK-NEXT: call void @objc_release(i8* [[OBJ]])
   // CHECK-NEXT: ret void
 }
 
 // CHECK-LABEL: define void @_Z10const_moveRKU8__strongP11objc_object(
 void const_move(const __strong id &x) {
   // CHECK:      [[Y:%.*]] = alloca i8*,
-  // CHECK:      [[X:%.*]] = call nonnull i8** @_Z4moveIRKU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_(
+  // CHECK:      [[X:%.*]] = call dereferenceable({{[0-9]+}}) i8** @_Z4moveIRKU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_(
   // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]]
   // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
   // CHECK-NEXT: store i8* [[T1]], i8** [[Y]]
   // CHECK-NEXT: [[T0:%.*]] = load i8** [[Y]]
   // CHECK-NEXT: call void @objc_release(i8* [[T0]])
   id y = move(x);
 }

test/CodeGenObjCXX/arc-special-member-functions.mm

 // CHECK-LABEL: define void @_Z32test_ObjCBlockMember_copy_assign15ObjCBlockMemberS_
 void test_ObjCBlockMember_copy_assign(ObjCBlockMember m1, ObjCBlockMember m2) {
   // CHECK: {{call.*_ZN15ObjCBlockMemberaSERKS_}}
   m1 = m2;
   // CHECK-NEXT: ret void
 }
 
 // Implicitly-generated copy assignment operator for ObjCBlockMember
-// CHECK:    define linkonce_odr nonnull {{%.*}}* @_ZN15ObjCBlockMemberaSERKS_(
+// CHECK:    define linkonce_odr dereferenceable({{[0-9]+}}) {{%.*}}* @_ZN15ObjCBlockMemberaSERKS_(
 // CHECK:      [[T0:%.*]] = getelementptr inbounds [[T:%.*]]* {{%.*}}, i32 0, i32 0
 // CHECK-NEXT: [[T1:%.*]] = load i32 (i32)** [[T0]], align 8
 // CHECK-NEXT: [[T2:%.*]] = bitcast i32 (i32)* [[T1]] to i8*
 // CHECK-NEXT: [[T3:%.*]] = call i8* @objc_retainBlock(i8* [[T2]])
 // CHECK-NEXT: [[T4:%.*]] = bitcast i8* [[T3]] to i32 (i32)*
 // CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds [[T]]* {{%.*}}, i32 0, i32 0
 // CHECK-NEXT: [[T6:%.*]] = load i32 (i32)** [[T5]], align 8
 // CHECK-NEXT: store i32 (i32)* [[T4]], i32 (i32)** [[T5]]

test/CodeGenObjCXX/implicit-copy-assign-operator.mm

struct D : A, B, virtual C {
 
   CopyByValue by_value;
 };
 
 void test_D(D d1, D d2) {
   d1 = d2;
 }
 
-// CHECK-OBJ-LABEL: define linkonce_odr nonnull %struct.D* @_ZN1DaSERS_
+// CHECK-OBJ-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.D* @_ZN1DaSERS_
 // CHECK-OBJ: {{call.*_ZN1AaSERS_}}
 // CHECK-OBJ: {{call.*_ZN1BaSERS_}}
 // CHECK-OBJ: {{call.*_ZN1CaSERKS_}}
 // CHECK-OBJ: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 24}}
 // CHECK-OBJ: {{call.*_ZN1BaSERS_}}
 // CHECK-OBJ: br
 // CHECK-OBJ: {{call.*_ZN1CaSERKS_}}
 // CHECK-OBJ: {{call.*@objc_memmove_collectable}}

test/CodeGenObjCXX/implicit-copy-constructor.mm

union {
     float f[3];
   };
 };
 
 void f(D d) {
   D d2(d);
 }
 
-// CHECK-LABEL: define linkonce_odr void @_ZN1DC1ERS_(%struct.D* %this, %struct.D* nonnull) unnamed_addr
+// CHECK-LABEL: define linkonce_odr void @_ZN1DC1ERS_(%struct.D* %this, %struct.D* dereferenceable({{[0-9]+}})) unnamed_addr
 // CHECK: call void @_ZN1AC1Ev
 // CHECK: call void @_ZN1CC2ERS_1A
 // CHECK: call void @_ZN1AD1Ev
 // CHECK: call void @_ZN1AC2ERS_
 // CHECK: call void @_ZN1BC2ERS_
 // CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 24}}
 // CHECK: call void @_ZN1BC1ERS_
 // CHECK: br

test/CodeGenObjCXX/lvalue-reference-getter.mm

//  [self sections].at(100);
     self.sections.at(100);
    return gSetSection;
 }
 @end
 
 // CHECK: [[SELF:%.*]] = alloca [[T6:%.*]]*, align
 // CHECK: [[T0:%.*]] = load {{.*}}* [[SELF]], align
 // CHECK: [[T1:%.*]] = load {{.*}}* @"\01L_OBJC_SELECTOR_REFERENCES_"
-// CHECK: [[C:%.*]] = call nonnull %struct.SetSection* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
-// CHECK: call nonnull i32* @_ZN10SetSection2atEi(%struct.SetSection* [[C]]
+// CHECK: [[C:%.*]] = call dereferenceable({{[0-9]+}}) %struct.SetSection* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK: call dereferenceable({{[0-9]+}}) i32* @_ZN10SetSection2atEi(%struct.SetSection* [[C]]

test/CodeGenObjCXX/message-reference.mm

 @end
 
 @implementation MyClass
 +(int)writeBlip:(I*)srcBlip{
   return ([srcBlip referenceCount] == 0);
 }
 @end
 
-// CHECK: [[T:%.*]] = call nonnull i32* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK: [[T:%.*]] = call dereferenceable({{[0-9]+}}) i32* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
 // CHECK: [[U:%.*]] = load i32* [[T]]
 // CHECK  [[V:%.*]] = icmp eq i32 [[U]], 0

test/CodeGenObjCXX/property-dot-reference.mm

 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fexceptions -o - %s | FileCheck %s
 // rdar://8409336
 
 struct TFENode {
 void GetURL() const;
 };
 
 @interface TNodeIconAndNameCell
 - (const TFENode&) node;
 @end
 
 @implementation TNodeIconAndNameCell     
 - (const TFENode&) node {
-// CHECK: call nonnull %struct.TFENode* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK: call dereferenceable({{[0-9]+}}) %struct.TFENode* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
 // CHECK-NEXT: call void @_ZNK7TFENode6GetURLEv(%struct.TFENode* %{{.*}})
   self.node.GetURL();
 } // expected-warning {{control reaches end of non-void function}}
 @end
 
 // rdar://8437240
 struct X {
   int x;
 };
 
 void f0(const X &parent);
 @interface A
 - (const X&) target;
 @end
 void f1(A *a) {
-// CHECK: [[PRP:%.*]] = call nonnull %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
-// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* nonnull [[PRP]])
+// CHECK: [[PRP:%.*]] = call dereferenceable({{[0-9]+}}) %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* dereferenceable({{[0-9]+}}) [[PRP]])
   f0(a.target);
 
-// CHECK: [[MSG:%.*]] = call nonnull %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
-// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* nonnull [[MSG]])
+// CHECK: [[MSG:%.*]] = call dereferenceable({{[0-9]+}}) %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* dereferenceable({{[0-9]+}}) [[MSG]])
   f0([a target]);
 }
 
 @interface Test2
 @property (readonly) int myProperty;
 - (int) myProperty;
 - (double) myGetter;
 @end

test/CodeGenObjCXX/property-lvalue-capture.mm

 @end
 void test(C *c, const A &a) {
  const A &result = c.prop = a;
 }
 
 // CHECK:   [[ONE1:%.*]] = load %struct.A** [[AADDR:%.*]], align 8
 // CHECK:   [[TWO1:%.*]] = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_5", !invariant.load ![[MD_NUM]]
 // CHECK:   [[THREE1:%.*]] = bitcast [[TWOT:%.*]]* [[ZERO1:%.*]] to i8*
-// CHECK:   call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, %struct.A*)*)(i8* [[THREE1]], i8* [[TWO1]], %struct.A* nonnull [[ONE1]])
+// CHECK:   call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, %struct.A*)*)(i8* [[THREE1]], i8* [[TWO1]], %struct.A* dereferenceable({{[0-9]+}}) [[ONE1]])
 // CHECK:   store %struct.A* [[ONE1]], %struct.A** [[RESULT:%.*]], align 8

test/CodeGenObjCXX/property-object-reference-2.mm

@implementation MyDocument
   @synthesize MyProperty = _cppObject;
   @synthesize MyProperty1 = _cppObject1;
 @end
 
 // CHECK-LABEL: define internal void @__copy_helper_atomic_property_(
 // CHECK: [[TWO:%.*]] = load %struct.TCPPObject** [[ADDR:%.*]], align 8
 // CHECK: [[THREE:%.*]] = load %struct.TCPPObject** [[ADDR1:%.*]], align 8
 // CHECK: [[CALL:%.*]] = call i32 @_Z7DEFAULTv()
-// CHECK:  call void @_ZN10TCPPObjectC1ERKS_i(%struct.TCPPObject* [[TWO]], %struct.TCPPObject* nonnull [[THREE]], i32 [[CALL]])
+// CHECK:  call void @_ZN10TCPPObjectC1ERKS_i(%struct.TCPPObject* [[TWO]], %struct.TCPPObject* dereferenceable({{[0-9]+}}) [[THREE]], i32 [[CALL]])
 // CHECK:  ret void
 
 // CHECK: define internal void @"\01-[MyDocument MyProperty]"(
 // CHECK: [[ONE:%.*]] = bitcast i8* [[ADDPTR:%.*]] to %struct.TCPPObject*
 // CHECK: [[TWO:%.*]] = bitcast %struct.TCPPObject* [[ONE]] to i8*
 // CHECK: [[THREE:%.*]] = bitcast %struct.TCPPObject* [[AGGRESULT:%.*]] to i8*
 // CHECK: call void @objc_copyCppObjectAtomic(i8* [[THREE]], i8* [[TWO]], i8* bitcast (void (%struct.TCPPObject*, %struct.TCPPObject*)* @__copy_helper_atomic_property_ to i8*))
 // CHECK: ret void
 
 // CHECK-LABEL: define internal void @__assign_helper_atomic_property_(
 // CHECK: [[TWO:%.*]] = load %struct.TCPPObject** [[ADDR:%.*]], align 8
 // CHECK: [[THREE:%.*]] = load %struct.TCPPObject** [[ADDR1:%.*]], align 8
-// CHECK: [[CALL:%.*]] = call nonnull %struct.TCPPObject* @_ZN10TCPPObjectaSERKS_(%struct.TCPPObject* [[TWO]], %struct.TCPPObject* nonnull [[THREE]])
+// CHECK: [[CALL:%.*]] = call dereferenceable({{[0-9]+}}) %struct.TCPPObject* @_ZN10TCPPObjectaSERKS_(%struct.TCPPObject* [[TWO]], %struct.TCPPObject* dereferenceable({{[0-9]+}}) [[THREE]])
 // CHECK:  ret void
 
 // CHECK: define internal void @"\01-[MyDocument setMyProperty:]"(
 // CHECK: [[ONE:%.*]] = bitcast i8* [[ADDRPTR:%.*]] to %struct.TCPPObject*
 // CHECK: [[TWO:%.*]] = bitcast %struct.TCPPObject* [[ONE]] to i8*
 // CHECK: [[THREE:%.*]] = bitcast %struct.TCPPObject* [[MYPROPERTY:%.*]] to i8*
 // CHECK: call void @objc_copyCppObjectAtomic(i8* [[TWO]], i8* [[THREE]], i8* bitcast (void (%struct.TCPPObject*, %struct.TCPPObject*)* @__assign_helper_atomic_property_ to i8*))
 // CHECK: ret void
 
 // CHECK-GNUSTEP: objc_getCppObjectAtomic
 // CHECK-GNUSTEP: objc_setCppObjectAtomic

test/CodeGenObjCXX/property-objects.mm

 @end
 
 @implementation I
 @synthesize position;
 @synthesize bounds;
 @synthesize frame;
 
 // CHECK: define internal void @"\01-[I setPosition:]"
-// CHECK: call nonnull %class.S* @_ZN1SaSERKS_
+// CHECK: call dereferenceable({{[0-9]+}}) %class.S* @_ZN1SaSERKS_
 // CHECK-NEXT: ret void
 
 - (void)setFrame:(CGRect)frameRect {}
 - (CGRect)frame {return bounds;}
 
 - (void)initWithOwner {
   I* _labelLayer;
   CGRect labelLayerFrame = self.bounds;
   labelLayerFrame = self.bounds;
   _labelLayer.frame = labelLayerFrame;
 }
 
 // rdar://8366604
 - (void)dealloc
   {
       CGRect cgrect = self.extent;
   }
 - (struct CGRect)extent {return bounds;}
 
 @end
 
 // CHECK-LABEL: define i32 @main
-// CHECK: call void @_ZN1SC1ERKS_(%class.S* [[AGGTMP:%[a-zA-Z0-9\.]+]], %class.S* nonnull {{%[a-zA-Z0-9\.]+}})
+// CHECK: call void @_ZN1SC1ERKS_(%class.S* [[AGGTMP:%[a-zA-Z0-9\.]+]], %class.S* dereferenceable({{[0-9]+}}) {{%[a-zA-Z0-9\.]+}})
 // CHECK: call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, %class.S*)*)(i8* {{%[a-zA-Z0-9\.]+}}, i8* {{%[a-zA-Z0-9\.]+}}, %class.S* [[AGGTMP]])
 // CHECK-NEXT: ret i32 0
 int main() {
   I *i;
   S s1;
   i.position = s1;
   return 0;
 }
 
 // rdar://8379892
 // CHECK-LABEL: define void @_Z1fP1A
 // CHECK: call void @_ZN1XC1Ev(%struct.X* [[LVTEMP:%[a-zA-Z0-9\.]+]])
-// CHECK: call void @_ZN1XC1ERKS_(%struct.X* [[AGGTMP:%[a-zA-Z0-9\.]+]], %struct.X* nonnull [[LVTEMP]])
+// CHECK: call void @_ZN1XC1ERKS_(%struct.X* [[AGGTMP:%[a-zA-Z0-9\.]+]], %struct.X* dereferenceable({{[0-9]+}}) [[LVTEMP]])
 // CHECK: call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, %struct.X*)*)({{.*}} %struct.X* [[AGGTMP]])
 struct X {
   X();
   X(const X&);
   ~X();
 };
 
 @interface A {

test/CodeGenObjCXX/property-reference.mm

void test0() {
   MyClass* myClass;
   MyStruct myStruct;
 
   myClass.foo = myStruct;
 
   const MyStruct& currentMyStruct = myClass.foo;   
 }
 
-// CHECK: [[C:%.*]] = call nonnull %struct.MyStruct* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
+// CHECK: [[C:%.*]] = call dereferenceable({{[0-9]+}}) %struct.MyStruct* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
 // CHECK:   store %struct.MyStruct* [[C]], %struct.MyStruct** [[D:%.*]]
 
 namespace test1 {
   struct A { A(); A(const A&); A&operator=(const A&); ~A(); };
 }
 @interface Test1 {
   test1::A ivar;
 }
 @property (nonatomic) const test1::A &prop1;
 @end
 @implementation Test1
 @synthesize prop1 = ivar;
 @end
-// CHECK:    define internal nonnull [[A:%.*]]* @"\01-[Test1 prop1]"(
+// CHECK:    define internal dereferenceable({{[0-9]+}}) [[A:%.*]]* @"\01-[Test1 prop1]"(
 // CHECK:      [[SELF:%.*]] = alloca [[TEST1:%.*]]*, align 8
 // CHECK:      [[T0:%.*]] = load [[TEST1]]** [[SELF]]
 // CHECK-NEXT: [[T1:%.*]] = bitcast [[TEST1]]* [[T0]] to i8*
 // CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i8* [[T1]], i64 0
 // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
 // CHECK-NEXT: ret [[A]]* [[T3]]
 
 // CHECK:    define internal void @"\01-[Test1 setProp1:]"(
-// CHECK:      call nonnull [[A]]* @_ZN5test11AaSERKS0_(
+// CHECK:      call dereferenceable({{[0-9]+}}) [[A]]* @_ZN5test11AaSERKS0_(
 // CHECK-NEXT: ret void
 
 // rdar://problem/10497174
 @interface Test2
 @property int prop;
 @end
 
 // The fact that these are all non-dependent is critical.

test/Modules/templates.mm

unsigned testMixedStruct() {
   // CHECK: %[[r:.*]] = alloca %[[ListInt]], align 8
 
   // CHECK: call {{.*}}memcpy{{.*}}(i8* %{{.*}}, i8* bitcast ({{.*}}* @_ZZ15testMixedStructvE1l to i8*), i64 16,
   ListInt_left l{0, 1};
 
   // CHECK: call {{.*}}memcpy{{.*}}(i8* %{{.*}}, i8* bitcast ({{.*}}* @_ZZ15testMixedStructvE1r to i8*), i64 16,
   ListInt_right r{0, 2};
 
-  // CHECK: call void @_Z10useListIntR4ListIiE(%[[ListInt]]* nonnull %[[l]])
+  // CHECK: call void @_Z10useListIntR4ListIiE(%[[ListInt]]* dereferenceable({{[0-9]+}}) %[[l]])
   useListInt(l);
-  // CHECK: call void @_Z10useListIntR4ListIiE(%[[ListInt]]* nonnull %[[r]])
+  // CHECK: call void @_Z10useListIntR4ListIiE(%[[ListInt]]* dereferenceable({{[0-9]+}}) %[[r]])
   useListInt(r);
 
   // CHECK: load i32* bitcast (i8* getelementptr inbounds (i8* bitcast ({{.*}}* @list_left to i8*), i64 8) to i32*)
   // CHECK: load i32* bitcast (i8* getelementptr inbounds (i8* bitcast ({{.*}}* @list_right to i8*), i64 8) to i32*)
   return list_left.*size_right + list_right.*size_left;
 }
 
 template<typename T> struct MergePatternDecl {