CFI: Introduce -fsanitize=cfi-icall flag.

[pcc]

Summary

This flag causes the compiler to emit bit set entries for functions as well
as runtime bitset checks at indirect call sites. Depends on the new function
bitset mechanism.

[rsmith]

This seems to have a lot of overlap with the function sanitizer. The documentation would probably benefit from some advice about when to use each and how they compare.

lib/AST/ItaniumMangle.cpp

4100–4107

:( Making up a name here seems like it should not be necessary. Could you use a named metadata node with no name as the key for your bitset? (Weird as it is, that seems to be our representation for "internal linkage" metadata.)

[samsonov]

Driver changes look good.

[pcc]

• Create distinct MDNodes for types with internal linkage; replace custom bit set mangling with mangleTypeName throughout
• Add documentation explaining the difference between this and -fsanitize=function

[pcc]

The documentation would probably benefit from some advice about when to use each and how they compare.

Added.

lib/AST/ItaniumMangle.cpp

4100–4107

Done. This also required some improvements to the bitset lowering pass (D11857) to permit non-string bitset identifiers.

[pcc]

Rebase onto D12038

[kcc]

docs/ControlFlowIntegrity.rst

151

mention that LTO is require explicitly?

[pcc]

• Address comment

docs/ControlFlowIntegrity.rst

151

Done above.

[pcc]

• Add apology for lack of documentation

[kcc]

LGTM with a nit

test/CodeGen/cfi-icall.c

2

Add a comment explaining what we are testing here.
same below.

[pcc]

test/CodeGen/cfi-icall.c

2

Done

docs/ControlFlowIntegrity.rst

 
 Clang includes an implementation of a number of control flow integrity (CFI)
 schemes, which are designed to abort the program upon detecting certain forms
 of undefined behavior that can potentially allow attackers to subvert the
 program's control flow. These schemes have been optimized for performance,
 allowing developers to enable them in release builds.
 
 To enable Clang's available CFI schemes, use the flag ``-fsanitize=cfi``.
-As currently implemented, CFI relies on link-time optimization (LTO); so it is
-required to specify ``-flto``, and the linker used must support LTO, for example
-via the `gold plugin`_. To allow the checks to be implemented efficiently,
-the program must be structured such that certain object files are compiled
-with CFI enabled, and are statically linked into the program. This may
-preclude the use of shared libraries in some cases.
+As currently implemented, all of Clang's CFI schemes (``cfi-vcall``,
+``cfi-derived-cast``, ``cfi-unrelated-cast``, ``cfi-nvcall``, ``cfi-icall``)
+rely on link-time optimization (LTO); so it is required to specify
+``-flto``, and the linker used must support LTO, for example via the `gold
+plugin`_. To allow the checks to be implemented efficiently, the program must
+be structured such that certain object files are compiled with CFI enabled,
+and are statically linked into the program. This may preclude the use of
+shared libraries in some cases.
 
 Clang currently implements forward-edge CFI for member function calls and
 bad cast checking. More schemes are under development.
 
 .. _gold plugin: http://llvm.org/docs/GoldPlugin.html
 
 Forward-Edge CFI for Virtual Calls
 ----------------------------------

 to the least derived such class.
 
 Casting an instance of a base class to such a derived class is technically
 undefined behavior, but it is a relatively common hack for introducing
 member functions on class instances with specific properties that works under
 most compilers and should not have security implications, so we allow it by
 default. It can be disabled with ``-fsanitize=cfi-cast-strict``.
 
+Indirect Function Call Checking
+-------------------------------
+
+This scheme checks that function calls take place using a function of the
+correct dynamic type; that is, the dynamic type of the function must match
+the static type used at the call. This CFI scheme can be enabled on its own
+using ``-fsanitize=cfi-icall``.
+
+For this scheme to work, each indirect function call in the program, other
+than calls in :ref:`blacklisted <cfi-blacklist>` functions, must call a
+function which was either compiled with ``-fsanitize=cfi-icall`` enabled,
+or whose address was taken by a function in a translation unit compiled with
+``-fsanitize=cfi-icall``.
+
+If a function in a translation unit compiled with ``-fsanitize=cfi-icall``
+takes the address of a function not compiled with ``-fsanitize=cfi-icall``,
+that address may differ from the address taken by a function in a translation
+unit not compiled with ``-fsanitize=cfi-icall``. This is technically a
+violation of the C and C++ standards, but it should not affect most programs.
+
+Each translation unit compiled with ``-fsanitize=cfi-icall`` must be
+statically linked into the program or shared library, and calls across
+shared library boundaries are handled as if the callee was not compiled with
+``-fsanitize=cfi-icall``.
+
+This scheme is currently only supported on the x86 and x86_64 architectures.
+
+``-fsanitize=cfi-icall`` and ``-fsanitize=function``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This tool is similar to ``-fsanitize=function`` in that both tools check
+the types of function calls. However, the two tools occupy different points
+on the design space; ``-fsanitize=function`` is a developer tool designed
+to find bugs in local development builds, whereas ``-fsanitize=cfi-icall``
+is a security hardening mechanism designed to be deployed in release builds.
+
+``-fsanitize=function`` has a higher space and time overhead due to a more
+complex type check at indirect call sites, as well as a need for run-time
+type information (RTTI), which may make it unsuitable for deployment. Because
+of the need for RTTI, ``-fsanitize=function`` can only be used with C++
+programs, whereas ``-fsanitize=cfi-icall`` can protect both C and C++ programs.
+
+On the other hand, ``-fsanitize=function`` conforms more closely with the C++
+standard and user expectations around interaction with shared libraries;
+the identity of function pointers is maintained, and calls across shared
+library boundaries are no different from calls within a single program or
+shared library.
+
 .. _cfi-blacklist:
 
 Blacklist
 ---------
 
 A :doc:`SanitizerSpecialCaseList` can be used to relax CFI checks for certain
 source files, functions and types using the ``src``, ``fun`` and ``type``
 entity types.

include/clang/AST/Mangle.h

virtual void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
                                      raw_ostream &Out) = 0;
 
   /// Generates a unique string for an externally visible type for use with TBAA
   /// or type uniquing.
   /// TODO: Extend this to internal types by generating names that are unique
   /// across translation units so it can be used with LTO.
   virtual void mangleTypeName(QualType T, raw_ostream &) = 0;
 
-  virtual void mangleCXXVTableBitSet(const CXXRecordDecl *RD,
-                                     raw_ostream &) = 0;
-
   /// @}
 };
 
 class ItaniumMangleContext : public MangleContext {
 public:
   explicit ItaniumMangleContext(ASTContext &C, DiagnosticsEngine &D)
       : MangleContext(C, D, MK_Itanium) {}
 

include/clang/Basic/Sanitizers.def

 SANITIZER("unsigned-integer-overflow", UnsignedIntegerOverflow)
 
 // DataFlowSanitizer
 SANITIZER("dataflow", DataFlow)
 
 // Control Flow Integrity
 SANITIZER("cfi-cast-strict", CFICastStrict)
 SANITIZER("cfi-derived-cast", CFIDerivedCast)
+SANITIZER("cfi-icall", CFIICall)
 SANITIZER("cfi-unrelated-cast", CFIUnrelatedCast)
 SANITIZER("cfi-nvcall", CFINVCall)
 SANITIZER("cfi-vcall", CFIVCall)
 SANITIZER_GROUP("cfi", CFI,
-                CFIDerivedCast | CFIUnrelatedCast | CFINVCall | CFIVCall)
+                CFIDerivedCast | CFIICall | CFIUnrelatedCast | CFINVCall |
+                CFIVCall)
 
 // Safe Stack
 SANITIZER("safe-stack", SafeStack)
 
 // -fsanitize=undefined includes all the sanitizers which have low overhead, no
 // ABI or address space layout implications, and only catch undefined behavior.
 SANITIZER_GROUP("undefined", Undefined,
                 Alignment | Bool | ArrayBounds | Enum | FloatCastOverflow |

lib/AST/ItaniumMangle.cpp

public:
   void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
                              raw_ostream &Out) override;
   void mangleItaniumThreadLocalInit(const VarDecl *D, raw_ostream &) override;
   void mangleItaniumThreadLocalWrapper(const VarDecl *D,
                                        raw_ostream &) override;
 
   void mangleStringLiteral(const StringLiteral *, raw_ostream &) override;
 
-  void mangleCXXVTableBitSet(const CXXRecordDecl *RD, raw_ostream &) override;
-
   bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
     // Lambda closure types are already numbered.
     if (isLambda(ND))
       return false;
 
     // Anonymous tags are already numbered.
     if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
       if (Tag->getName().empty() && !Tag->getTypedefNameForAnonDecl())
void ItaniumMangleContextImpl::mangleCXXRTTIName(QualType Ty,
   Mangler.getStream() << "_ZTS";
   Mangler.mangleType(Ty);
 }
 
 void ItaniumMangleContextImpl::mangleTypeName(QualType Ty, raw_ostream &Out) {
   mangleCXXRTTIName(Ty, Out);
 }
 
-void ItaniumMangleContextImpl::mangleCXXVTableBitSet(const CXXRecordDecl *RD,
-                                                     raw_ostream &Out) {
-  if (!RD->isExternallyVisible()) {
-    // This part of the identifier needs to be unique across all translation
-    // units in the linked program. The scheme fails if multiple translation
-    // units are compiled using the same relative source file path, or if
-    // multiple translation units are built from the same source file.
-    SourceManager &SM = getASTContext().getSourceManager();
-    Out << "[" << SM.getFileEntryForID(SM.getMainFileID())->getName() << "]";
-  }
-
-  CXXNameMangler Mangler(*this, Out);
-  Mangler.mangleType(QualType(RD->getTypeForDecl(), 0));
-}
-
 void ItaniumMangleContextImpl::mangleStringLiteral(const StringLiteral *, raw_ostream &) {
   llvm_unreachable("Can't mangle string literals");
 }
 
 ItaniumMangleContext *
 ItaniumMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
   return new ItaniumMangleContextImpl(Context, Diags);
 }
 

lib/AST/MicrosoftMangle.cpp

public:
   void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
   void mangleDynamicAtExitDestructor(const VarDecl *D,
                                      raw_ostream &Out) override;
   void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
                                  raw_ostream &Out) override;
   void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
                              raw_ostream &Out) override;
   void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
-  void mangleCXXVTableBitSet(const CXXRecordDecl *RD,
-                             raw_ostream &Out) override;
   bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
     // Lambda closure types are already numbered.
     if (isLambda(ND))
       return false;
 
     const DeclContext *DC = getEffectiveDeclContext(ND);
     if (!DC->isFunctionOrMethod())
       return false;
void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
   if (NumCharsToMangle < 32)
     for (unsigned NullTerminator = 0; NullTerminator < SL->getCharByteWidth();
          ++NullTerminator)
       MangleByte(0);
 
   Mangler.getStream() << '@';
 }
 
-void MicrosoftMangleContextImpl::mangleCXXVTableBitSet(const CXXRecordDecl *RD,
-                                                       raw_ostream &Out) {
-  if (!RD->isExternallyVisible()) {
-    // This part of the identifier needs to be unique across all translation
-    // units in the linked program. The scheme fails if multiple translation
-    // units are compiled using the same relative source file path, or if
-    // multiple translation units are built from the same source file.
-    SourceManager &SM = getASTContext().getSourceManager();
-    Out << "[" << SM.getFileEntryForID(SM.getMainFileID())->getName() << "]";
-  }
-
-  MicrosoftCXXNameMangler mangler(*this, Out);
-  mangler.mangleName(RD);
-}
-
 MicrosoftMangleContext *
 MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
   return new MicrosoftMangleContextImpl(Context, Diags);
 }

lib/CodeGen/CGClass.cpp

void CodeGenFunction::EmitVTablePtrCheck(const CXXRecordDecl *RD,
                                          llvm::Value *VTable,
                                          CFITypeCheckKind TCK,
                                          SourceLocation Loc) {
   if (CGM.IsCFIBlacklistedRecord(RD))
     return;
 
   SanitizerScope SanScope(this);
 
-  std::string OutName;
-  llvm::raw_string_ostream Out(OutName);
-  CGM.getCXXABI().getMangleContext().mangleCXXVTableBitSet(RD, Out);
-
   llvm::Value *BitSetName = llvm::MetadataAsValue::get(
-      getLLVMContext(), llvm::MDString::get(getLLVMContext(), Out.str()));
+      getLLVMContext(),
+      CGM.CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0)));
 
   llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
   llvm::Value *BitSetTest =
       Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::bitset_test),
                          {CastedVTable, BitSetName});
 
   SanitizerMask M;
   switch (TCK) {

lib/CodeGen/CGExpr.cpp

if (llvm::Constant *PrefixSig =
       EmitCheck(std::make_pair(CalleeRTTIMatch, SanitizerKind::Function),
                 "function_type_mismatch", StaticData, Callee);
 
       Builder.CreateBr(Cont);
       EmitBlock(Cont);
     }
   }
 
+  // If we are checking indirect calls and this call is indirect, check that the
+  // function pointer is a member of the bit set for the function type.
+  if (SanOpts.has(SanitizerKind::CFIICall) &&
+      (!TargetDecl || !isa<FunctionDecl>(TargetDecl))) {
+    SanitizerScope SanScope(this);
+
+    llvm::Value *BitSetName = llvm::MetadataAsValue::get(
+        getLLVMContext(),
+        CGM.CreateMetadataIdentifierForType(QualType(FnType, 0)));
+
+    llvm::Value *CastedCallee = Builder.CreateBitCast(Callee, Int8PtrTy);
+    llvm::Value *BitSetTest =
+        Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::bitset_test),
+                           {CastedCallee, BitSetName});
+
+    llvm::Constant *StaticData[] = {
+      EmitCheckSourceLocation(E->getLocStart()),
+      EmitCheckTypeDescriptor(QualType(FnType, 0)),
+    };
+    EmitCheck(std::make_pair(BitSetTest, SanitizerKind::CFIICall),
+              "cfi_bad_icall", StaticData, CastedCallee);
+  }
+
   CallArgList Args;
   if (Chain)
     Args.add(RValue::get(Builder.CreateBitCast(Chain, CGM.VoidPtrTy)),
              CGM.getContext().VoidPtrTy);
   EmitCallArgs(Args, dyn_cast<FunctionProtoType>(FnType), E->arguments(),
                E->getDirectCallee(), /*ParamsToSkip*/ 0);
 
   const CGFunctionInfo &FnInfo = CGM.getTypes().arrangeFreeFunctionCall(

lib/CodeGen/CGVTables.cpp

if (!LangOpts.Sanitize.has(SanitizerKind::CFIVCall) &&
       !LangOpts.Sanitize.has(SanitizerKind::CFINVCall) &&
       !LangOpts.Sanitize.has(SanitizerKind::CFIDerivedCast) &&
       !LangOpts.Sanitize.has(SanitizerKind::CFIUnrelatedCast))
     return;
 
   CharUnits PointerWidth =
       Context.toCharUnitsFromBits(Context.getTargetInfo().getPointerWidth(0));
 
-  std::vector<llvm::MDTuple *> BitsetEntries;
+  typedef std::pair<const CXXRecordDecl *, unsigned> BSEntry;
+  std::vector<BSEntry> BitsetEntries;
   // Create a bit set entry for each address point.
   for (auto &&AP : VTLayout.getAddressPoints()) {
     if (IsCFIBlacklistedRecord(AP.first.getBase()))
       continue;
 
-    BitsetEntries.push_back(CreateVTableBitSetEntry(
-        VTable, PointerWidth * AP.second, AP.first.getBase()));
+    BitsetEntries.push_back(std::make_pair(AP.first.getBase(), AP.second));
   }
 
   // Sort the bit set entries for determinism.
-  std::sort(BitsetEntries.begin(), BitsetEntries.end(), [](llvm::MDTuple *T1,
-                                                           llvm::MDTuple *T2) {
-    if (T1 == T2)
+  std::sort(BitsetEntries.begin(), BitsetEntries.end(),
+            [this](const BSEntry &E1, const BSEntry &E2) {
+    if (&E1 == &E2)
       return false;
 
-    StringRef S1 = cast<llvm::MDString>(T1->getOperand(0))->getString();
-    StringRef S2 = cast<llvm::MDString>(T2->getOperand(0))->getString();
+    std::string S1;
+    llvm::raw_string_ostream O1(S1);
+    getCXXABI().getMangleContext().mangleTypeName(
+        QualType(E1.first->getTypeForDecl(), 0), O1);
+    O1.flush();
+
+    std::string S2;
+    llvm::raw_string_ostream O2(S2);
+    getCXXABI().getMangleContext().mangleTypeName(
+        QualType(E2.first->getTypeForDecl(), 0), O2);
+    O2.flush();
+
     if (S1 < S2)
       return true;
     if (S1 != S2)
       return false;
 
-    uint64_t Offset1 = cast<llvm::ConstantInt>(
-                           cast<llvm::ConstantAsMetadata>(T1->getOperand(2))
-                               ->getValue())->getZExtValue();
-    uint64_t Offset2 = cast<llvm::ConstantInt>(
-                           cast<llvm::ConstantAsMetadata>(T2->getOperand(2))
-                               ->getValue())->getZExtValue();
-    assert(Offset1 != Offset2);
-    return Offset1 < Offset2;
+    return E1.second < E2.second;
   });
 
   llvm::NamedMDNode *BitsetsMD =
       getModule().getOrInsertNamedMetadata("llvm.bitsets");
   for (auto BitsetEntry : BitsetEntries)
-    BitsetsMD->addOperand(BitsetEntry);
+    BitsetsMD->addOperand(CreateVTableBitSetEntry(
+        VTable, PointerWidth * BitsetEntry.second, BitsetEntry.first));
 }

lib/CodeGen/CodeGenModule.cpp

void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
   if (const SectionAttr *SA = FD->getAttr<SectionAttr>())
     F->setSection(SA->getName());
 
   // A replaceable global allocation function does not act like a builtin by
   // default, only if it is invoked by a new-expression or delete-expression.
   if (FD->isReplaceableGlobalAllocationFunction())
     F->addAttribute(llvm::AttributeSet::FunctionIndex,
                     llvm::Attribute::NoBuiltin);
+
+  // If we are checking indirect calls and this is not a non-static member
+  // function, emit a bit set entry for the function type.
+  if (LangOpts.Sanitize.has(SanitizerKind::CFIICall) &&
+      !(isa<CXXMethodDecl>(FD) && !cast<CXXMethodDecl>(FD)->isStatic())) {
+    llvm::NamedMDNode *BitsetsMD =
+        getModule().getOrInsertNamedMetadata("llvm.bitsets");
+
+    llvm::Metadata *BitsetOps[] = {
+        CreateMetadataIdentifierForType(FD->getType()),
+        llvm::ConstantAsMetadata::get(F),
+        llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(Int64Ty, 0))};
+    BitsetsMD->addOperand(llvm::MDTuple::get(getLLVMContext(), BitsetOps));
+  }
 }
 
 void CodeGenModule::addUsedGlobal(llvm::GlobalValue *GV) {
   assert(!GV->isDeclaration() &&
          "Only globals with definition can force usage.");
   LLVMUsed.emplace_back(GV);
 }
 
InternalId = llvm::MDNode::getDistinct(getLLVMContext(),
                                            llvm::ArrayRef<llvm::Metadata *>());
   }
 
   return InternalId;
 }
 
 llvm::MDTuple *CodeGenModule::CreateVTableBitSetEntry(
     llvm::GlobalVariable *VTable, CharUnits Offset, const CXXRecordDecl *RD) {
-  std::string OutName;
-  llvm::raw_string_ostream Out(OutName);
-  getCXXABI().getMangleContext().mangleCXXVTableBitSet(RD, Out);
-
   llvm::Metadata *BitsetOps[] = {
-      llvm::MDString::get(getLLVMContext(), Out.str()),
+      CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0)),
       llvm::ConstantAsMetadata::get(VTable),
       llvm::ConstantAsMetadata::get(
           llvm::ConstantInt::get(Int64Ty, Offset.getQuantity()))};
   return llvm::MDTuple::get(getLLVMContext(), BitsetOps);
 }

lib/Driver/ToolChain.cpp

bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args,
   CmdArgs.push_back(Args.MakeArgString(Path));
   return true;
 }
 
 SanitizerMask ToolChain::getSupportedSanitizers() const {
   // Return sanitizers which don't require runtime support and are not
   // platform or architecture-dependent.
   using namespace SanitizerKind;
-  return (Undefined & ~Vptr & ~Function) | CFI | CFICastStrict |
+  return (Undefined & ~Vptr & ~Function) | (CFI & ~CFIICall) | CFICastStrict |
          UnsignedIntegerOverflow | LocalBounds;
 }

lib/Driver/ToolChains.cpp

if (IsX86_64 || IsMIPS64 || IsAArch64)
     Res |= SanitizerKind::DataFlow;
   if (IsX86_64 || IsMIPS64)
     Res |= SanitizerKind::Leak;
   if (IsX86_64 || IsMIPS64 || IsAArch64)
     Res |= SanitizerKind::Thread;
   if (IsX86_64 || IsMIPS64 || IsPowerPC64)
     Res |= SanitizerKind::Memory;
   if (IsX86 || IsX86_64) {
+    Res |= SanitizerKind::CFIICall;
     Res |= SanitizerKind::Function;
     Res |= SanitizerKind::SafeStack;
   }
   return Res;
 }
 
 /// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
 

test/CodeGen/cfi-icall.c

+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -emit-llvm -o - %s | FileCheck --check-prefix=ITANIUM %s
+// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -emit-llvm -o - %s | FileCheck --check-prefix=MS %s
+
+void f() {
+}
+
+void xf();
+
+void g(int b) {
+  void (*fp)() = b ? f : xf;
+  // ITANIUM: call i1 @llvm.bitset.test(i8* {{.*}}, metadata !"_ZTSFvE")
+  fp();
+}
+
+// ITANIUM-DAG: !{!"_ZTSFvE", void ()* @f, i64 0}
+// ITANIUM-DAG: !{!"_ZTSFvE", void (...)* @xf, i64 0}
+// MS-DAG: !{!"?6AX@Z", void ()* @f, i64 0}
+// MS-DAG: !{!"?6AX@Z", void (...)* @xf, i64 0}

test/CodeGenCXX/cfi-cast.cpp

 struct B : A {
   virtual void f();
 };
 
 struct C : A {};
 
 // CHECK-DCAST-LABEL: define void @_Z3abpP1A
 void abp(A *a) {
-  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-DCAST: [[TRAPBB]]
   // CHECK-DCAST-NEXT: call void @llvm.trap()
   // CHECK-DCAST-NEXT: unreachable
 
   // CHECK-DCAST: [[CONTBB]]
   // CHECK-DCAST: ret
   static_cast<B*>(a);
 }
 
 // CHECK-DCAST-LABEL: define void @_Z3abrR1A
 void abr(A &a) {
-  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-DCAST: [[TRAPBB]]
   // CHECK-DCAST-NEXT: call void @llvm.trap()
   // CHECK-DCAST-NEXT: unreachable
 
   // CHECK-DCAST: [[CONTBB]]
   // CHECK-DCAST: ret
   static_cast<B&>(a);
 }
 
 // CHECK-DCAST-LABEL: define void @_Z4abrrO1A
 void abrr(A &&a) {
-  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-DCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-DCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-DCAST: [[TRAPBB]]
   // CHECK-DCAST-NEXT: call void @llvm.trap()
   // CHECK-DCAST-NEXT: unreachable
 
   // CHECK-DCAST: [[CONTBB]]
   // CHECK-DCAST: ret
   static_cast<B&&>(a);
 }
 
 // CHECK-UCAST-LABEL: define void @_Z3vbpPv
 void vbp(void *p) {
-  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-UCAST: [[TRAPBB]]
   // CHECK-UCAST-NEXT: call void @llvm.trap()
   // CHECK-UCAST-NEXT: unreachable
 
   // CHECK-UCAST: [[CONTBB]]
   // CHECK-UCAST: ret
   static_cast<B*>(p);
 }
 
 // CHECK-UCAST-LABEL: define void @_Z3vbrRc
 void vbr(char &r) {
-  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-UCAST: [[TRAPBB]]
   // CHECK-UCAST-NEXT: call void @llvm.trap()
   // CHECK-UCAST-NEXT: unreachable
 
   // CHECK-UCAST: [[CONTBB]]
   // CHECK-UCAST: ret
   reinterpret_cast<B&>(r);
 }
 
 // CHECK-UCAST-LABEL: define void @_Z4vbrrOc
 void vbrr(char &&r) {
-  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   // CHECK-UCAST-NEXT: br i1 [[P]], label %[[CONTBB:[^ ]*]], label %[[TRAPBB:[^ ,]*]]
 
   // CHECK-UCAST: [[TRAPBB]]
   // CHECK-UCAST-NEXT: call void @llvm.trap()
   // CHECK-UCAST-NEXT: unreachable
 
   // CHECK-UCAST: [[CONTBB]]
   // CHECK-UCAST: ret
   reinterpret_cast<B&&>(r);
 }
 
 // CHECK-UCAST-LABEL: define void @_Z3vcpPv
 // CHECK-UCAST-STRICT-LABEL: define void @_Z3vcpPv
 void vcp(void *p) {
-  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1A")
-  // CHECK-UCAST-STRICT: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1C")
+  // CHECK-UCAST: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
+  // CHECK-UCAST-STRICT: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
   static_cast<C*>(p);
 }

test/CodeGenCXX/cfi-icall.cpp

+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=ITANIUM %s
+// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=MS %s
+
+namespace {
+
+struct S {};
+
+void f(S *s) {
+}
+
+}
+
+void g() {
+  void (*fp)(S *) = f;
+  // CHECK: call i1 @llvm.bitset.test(i8* {{.*}}, metadata ![[VOIDS:[0-9]+]])
+  fp(0);
+}
+
+// ITANIUM: !{![[VOIDS]], void (%"struct.(anonymous namespace)::S"*)* @_ZN12_GLOBAL__N_11fEPNS_1SE, i64 0}
+// MS: !{![[VOIDS]], void (%"struct.(anonymous namespace)::S"*)* @"\01?f@?A@@YAXPEAUS@?A@@@Z", i64 0}

test/CodeGenCXX/cfi-ms-rtti.cpp

 // RUN: %clang_cc1 -emit-llvm -o - -triple=x86_64-pc-win32 %s -fsanitize=cfi-vcall | FileCheck --check-prefix=RTTI %s
 // RUN: %clang_cc1 -emit-llvm -o - -triple=x86_64-pc-win32 %s -fsanitize=cfi-vcall -fno-rtti-data | FileCheck --check-prefix=NO-RTTI %s
 
 struct A {
   A();
   virtual void f() {}
 };
 
 A::A() {}
 
-// RTTI: !{!"A@@", [2 x i8*]* {{.*}}, i64 8}
-// NO-RTTI: !{!"A@@", [1 x i8*]* {{.*}}, i64 0}
+// RTTI: !{!"?AUA@@", [2 x i8*]* {{.*}}, i64 8}
+// NO-RTTI: !{!"?AUA@@", [1 x i8*]* {{.*}}, i64 0}

test/CodeGenCXX/cfi-nvcall.cpp

 
 struct C : A {
   void g();
 };
 
 // CHECK-LABEL: @bg
 // CHECK-STRICT-LABEL: @bg
 extern "C" void bg(B *b) {
-  // CHECK: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
-  // CHECK-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
+  // CHECK: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
+  // CHECK-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
   b->g();
 }
 
 // CHECK-LABEL: @cg
 // CHECK-STRICT-LABEL: @cg
 extern "C" void cg(C *c) {
   // http://clang.llvm.org/docs/ControlFlowIntegrity.html#strictness
   // In this case C's layout is the same as its base class, so we allow
   // c to be of type A in non-strict mode.
 
-  // CHECK: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1A")
-  // CHECK-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1C")
+  // CHECK: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
+  // CHECK-STRICT: call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
   c->g();
 }

test/CodeGenCXX/cfi-vcall.cpp

 
 // DIAG: @[[SRC:.*]] = private unnamed_addr constant [{{.*}} x i8] c"{{.*}}cfi-vcall.cpp\00", align 1
 // DIAG: @[[TYPE:.*]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'A'\00" }
 // DIAG: @[[BADTYPESTATIC:.*]] = private unnamed_addr global { { [{{.*}} x i8]*, i32, i32 }, { i16, i16, [4 x i8] }*, i8 } { { [{{.*}} x i8]*, i32, i32 } { [{{.*}} x i8]* @[[SRC]], i32 [[@LINE+21]], i32 3 }, { i16, i16, [4 x i8] }* @[[TYPE]], i8 0 }
 
 // ITANIUM: define void @_Z2afP1A
 // MS: define void @"\01?af@@YAXPEAUA@@@Z"
 void af(A *a) {
-  // ITANIUM: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* [[VT:%[^ ]*]], metadata !"1A")
-  // MS: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* [[VT:%[^ ]*]], metadata !"A@@")
+  // ITANIUM: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* [[VT:%[^ ]*]], metadata !"_ZTS1A")
+  // MS: [[P:%[^ ]*]] = call i1 @llvm.bitset.test(i8* [[VT:%[^ ]*]], metadata !"?AUA@@")
   // CHECK-NEXT: br i1 [[P]], label %[[CONTBB:[^ ,]*]], label %[[TRAPBB:[^ ,]*]]
   // CHECK-NEXT: {{^$}}
 
   // CHECK: [[TRAPBB]]
   // NDIAG-NEXT: call void @llvm.trap()
   // NDIAG-NEXT: unreachable
   // DIAG-NEXT: [[VTINT:%[^ ]*]] = ptrtoint i8* [[VT]] to i64
   // DIAG-ABORT-NEXT: call void @__ubsan_handle_cfi_bad_type_abort(i8* bitcast ({{.*}} @[[BADTYPESTATIC]] to i8*), i64 [[VTINT]])
   // DIAG-ABORT-NEXT: unreachable
   // DIAG-RECOVER-NEXT: call void @__ubsan_handle_cfi_bad_type(i8* bitcast ({{.*}} @[[BADTYPESTATIC]] to i8*), i64 [[VTINT]])
   // DIAG-RECOVER-NEXT: br label %[[CONTBB]]
 
   // CHECK: [[CONTBB]]
   // CHECK: call void %
   a->f();
 }
 
 // ITANIUM: define internal void @_Z3df1PN12_GLOBAL__N_11DE
 // MS: define internal void @"\01?df1@@YAXPEAUD@?A@@@Z"
 void df1(D *d) {
-  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"[{{.*}}cfi-vcall.cpp]N12_GLOBAL__N_11DE")
-  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"A@@")
+  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
+  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"?AUA@@")
   d->f();
 }
 
 // ITANIUM: define internal void @_Z3dg1PN12_GLOBAL__N_11DE
 // MS: define internal void @"\01?dg1@@YAXPEAUD@?A@@@Z"
 void dg1(D *d) {
-  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"1B")
-  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"B@@")
+  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
+  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"?AUB@@")
   d->g();
 }
 
 // ITANIUM: define internal void @_Z3dh1PN12_GLOBAL__N_11DE
 // MS: define internal void @"\01?dh1@@YAXPEAUD@?A@@@Z"
 void dh1(D *d) {
-  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"[{{.*}}cfi-vcall.cpp]N12_GLOBAL__N_11DE")
-  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"[{{.*}}cfi-vcall.cpp]D@?A@@")
+  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata ![[DTYPE]])
+  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata ![[DTYPE:[0-9]+]])
   d->h();
 }
 
 // ITANIUM: define internal void @_Z3df2PN12_GLOBAL__N_11DE
 // MS: define internal void @"\01?df2@@YAXPEAUD@?A@@@Z"
 __attribute__((no_sanitize("cfi")))
 void df2(D *d) {
   // CHECK-NOT: call i1 @llvm.bitset.test

 struct C : B, A {};
 struct D : C {
   void m_fn1();
 };
 
 // ITANIUM: define void @_ZN5test21fEPNS_1DE
 // MS: define void @"\01?f@test2@@YAXPEAUD@1@@Z"
 void f(D *d) {
-  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"N5test21DE")
-  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"A@test2@@")
+  // ITANIUM: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"_ZTSN5test21DE")
+  // MS: {{%[^ ]*}} = call i1 @llvm.bitset.test(i8* {{%[^ ]*}}, metadata !"?AUA@test2@@")
   d->m_fn1();
 }
 
 }
 
 // Check for the expected number of elements (9 or 15 respectively).
 // MS: !llvm.bitsets = !{[[X:[^,]*(,[^,]*){8}]]}
 // ITANIUM: !llvm.bitsets = !{[[X:[^,]*(,[^,]*){14}]]}
 
-// ITANIUM-DAG: !{!"1A", [3 x i8*]* @_ZTV1A, i64 16}
-// ITANIUM-DAG: !{!"1A", [7 x i8*]* @_ZTCN12_GLOBAL__N_11DE0_1B, i64 32}
-// ITANIUM-DAG: !{!"1B", [7 x i8*]* @_ZTCN12_GLOBAL__N_11DE0_1B, i64 32}
-// ITANIUM-DAG: !{!"1A", [9 x i8*]* @_ZTCN12_GLOBAL__N_11DE8_1C, i64 64}
-// ITANIUM-DAG: !{!"1C", [9 x i8*]* @_ZTCN12_GLOBAL__N_11DE8_1C, i64 32}
-// ITANIUM-DAG: !{!"1A", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
-// ITANIUM-DAG: !{!"1B", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
-// ITANIUM-DAG: !{!"1C", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 88}
-// ITANIUM-DAG: !{!"[{{.*}}cfi-vcall.cpp]N12_GLOBAL__N_11DE", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
-// ITANIUM-DAG: !{!"1A", [7 x i8*]* @_ZTV1B, i64 32}
-// ITANIUM-DAG: !{!"1B", [7 x i8*]* @_ZTV1B, i64 32}
-// ITANIUM-DAG: !{!"1A", [5 x i8*]* @_ZTV1C, i64 32}
-// ITANIUM-DAG: !{!"1C", [5 x i8*]* @_ZTV1C, i64 32}
-// ITANIUM-DAG: !{!"1A", [3 x i8*]* @_ZTVZ3foovE2FA, i64 16}
-// ITANIUM-DAG: !{!"[{{.*}}cfi-vcall.cpp]Z3foovE2FA", [3 x i8*]* @_ZTVZ3foovE2FA, i64 16}
-
-// MS-DAG: !{!"A@@", [2 x i8*]* @[[VTA]], i64 8}
-// MS-DAG: !{!"B@@", [3 x i8*]* @[[VTB]], i64 8}
-// MS-DAG: !{!"A@@", [2 x i8*]* @[[VTAinB]], i64 8}
-// MS-DAG: !{!"A@@", [2 x i8*]* @[[VTAinC]], i64 8}
-// MS-DAG: !{!"B@@", [3 x i8*]* @[[VTBinD]], i64 8}
-// MS-DAG: !{!"[{{.*}}cfi-vcall.cpp]D@?A@@", [3 x i8*]* @[[VTBinD]], i64 8}
-// MS-DAG: !{!"A@@", [2 x i8*]* @[[VTAinBinD]], i64 8}
-// MS-DAG: !{!"A@@", [2 x i8*]* @[[VTFA]], i64 8}
-// MS-DAG: !{!"[{{.*}}cfi-vcall.cpp]FA@?1??foo@@YAXXZ@", [2 x i8*]* @[[VTFA]], i64 8}
+// ITANIUM-DAG: !{!"_ZTS1A", [3 x i8*]* @_ZTV1A, i64 16}
+// ITANIUM-DAG: !{!"_ZTS1A", [7 x i8*]* @_ZTCN12_GLOBAL__N_11DE0_1B, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1B", [7 x i8*]* @_ZTCN12_GLOBAL__N_11DE0_1B, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1A", [9 x i8*]* @_ZTCN12_GLOBAL__N_11DE8_1C, i64 64}
+// ITANIUM-DAG: !{!"_ZTS1C", [9 x i8*]* @_ZTCN12_GLOBAL__N_11DE8_1C, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1A", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1B", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1C", [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 88}
+// ITANIUM-DAG: !{![[DTYPE]], [12 x i8*]* @_ZTVN12_GLOBAL__N_11DE, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1A", [7 x i8*]* @_ZTV1B, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1B", [7 x i8*]* @_ZTV1B, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1A", [5 x i8*]* @_ZTV1C, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1C", [5 x i8*]* @_ZTV1C, i64 32}
+// ITANIUM-DAG: !{!"_ZTS1A", [3 x i8*]* @_ZTVZ3foovE2FA, i64 16}
+// ITANIUM-DAG: !{!{{[0-9]+}}, [3 x i8*]* @_ZTVZ3foovE2FA, i64 16}
+
+// MS-DAG: !{!"?AUA@@", [2 x i8*]* @[[VTA]], i64 8}
+// MS-DAG: !{!"?AUB@@", [3 x i8*]* @[[VTB]], i64 8}
+// MS-DAG: !{!"?AUA@@", [2 x i8*]* @[[VTAinB]], i64 8}
+// MS-DAG: !{!"?AUA@@", [2 x i8*]* @[[VTAinC]], i64 8}
+// MS-DAG: !{!"?AUB@@", [3 x i8*]* @[[VTBinD]], i64 8}
+// MS-DAG: !{![[DTYPE]], [3 x i8*]* @[[VTBinD]], i64 8}
+// MS-DAG: !{!"?AUA@@", [2 x i8*]* @[[VTAinBinD]], i64 8}
+// MS-DAG: !{!"?AUA@@", [2 x i8*]* @[[VTFA]], i64 8}
+// MS-DAG: !{!{{[0-9]+}}, [2 x i8*]* @[[VTFA]], i64 8}

test/Driver/fsanitize.c

 // RUN: %clang -target i386-pc-openbsd -fsanitize=address %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-OPENBSD
 // CHECK-ASAN-OPENBSD: unsupported option '-fsanitize=address' for target 'i386-pc-openbsd'
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=cfi -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=cfi-derived-cast -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-DCAST
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=cfi-unrelated-cast -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-UCAST
 // RUN: %clang -target x86_64-linux-gnu -flto -fsanitize=cfi-nvcall -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NVCALL
 // RUN: %clang -target x86_64-linux-gnu -flto -fsanitize=cfi-vcall -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-VCALL
-// CHECK-CFI: -emit-llvm-bc{{.*}}-fsanitize=cfi-derived-cast,cfi-unrelated-cast,cfi-nvcall,cfi-vcall
+// CHECK-CFI: -emit-llvm-bc{{.*}}-fsanitize=cfi-derived-cast,cfi-icall,cfi-unrelated-cast,cfi-nvcall,cfi-vcall
 // CHECK-CFI-DCAST: -emit-llvm-bc{{.*}}-fsanitize=cfi-derived-cast
 // CHECK-CFI-UCAST: -emit-llvm-bc{{.*}}-fsanitize=cfi-unrelated-cast
 // CHECK-CFI-NVCALL: -emit-llvm-bc{{.*}}-fsanitize=cfi-nvcall
 // CHECK-CFI-VCALL: -emit-llvm-bc{{.*}}-fsanitize=cfi-vcall
 
 // RUN: %clang -target x86_64-linux-gnu -flto -fsanitize=cfi-derived-cast -fno-lto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOLTO
 // CHECK-CFI-NOLTO: '-fsanitize=cfi-derived-cast' only allowed with '-flto'
 
+// RUN: %clang -target mips-unknown-linux -fsanitize=cfi-icall %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-ICALL-MIPS
+// CHECK-CFI-ICALL-MIPS: unsupported option '-fsanitize=cfi-icall' for target 'mips-unknown-linux'
+
 // RUN: %clang -target x86_64-linux-gnu -fsanitize-trap=address -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-TRAP
 // CHECK-ASAN-TRAP: error: unsupported argument 'address' to option '-fsanitize-trap'
 
 // RUN: %clang -target x86_64-apple-darwin10 -mmacosx-version-min=10.7 -flto -fsanitize=cfi-vcall -fno-sanitize-trap=cfi -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOTRAP-OLD-MACOS
 // CHECK-CFI-NOTRAP-OLD-MACOS: error: unsupported option '-fno-sanitize-trap=cfi-vcall' for target 'x86_64-apple-darwin10'
 
 // RUN: %clang -target x86_64-pc-win32 -flto -fsanitize=cfi-vcall -fno-sanitize-trap=cfi -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOTRAP-WIN
 // CHECK-CFI-NOTRAP-WIN: -emit-llvm-bc