RuntimeLibcalls: Add entries for __security_check_cookie

Avoids hardcoding string name based on target, and gets
the entry in the centralized list of emitted calls.

Author: arsenm

llvm/include/llvm/CodeGen/TargetLowering.h

@@ -3560,6 +3560,11 @@ class LLVM_ABI TargetLoweringBase {
     return Libcalls.getLibcallName(Call);
   }
 
+  /// Get the libcall routine name for the specified libcall implementation
+  const char *getLibcallImplName(RTLIB::LibcallImpl Call) const {
+    return Libcalls.getLibcallImplName(Call);
+  }
+
   const char *getMemcpyName() const { return Libcalls.getMemcpyName(); }
 
   /// Get the comparison predicate that's to be used to test the result of the

llvm/include/llvm/IR/RuntimeLibcalls.td

@@ -24,7 +24,8 @@ def isNotOSMSVCRT : RuntimeLibcallPredicate<"!TT.isOSMSVCRT()">;
 def isPS : RuntimeLibcallPredicate<"TT.isPS()">;
 def isNotOSWindowsOrIsCygwinMinGW
   : RuntimeLibcallPredicate<"!TT.isOSWindows() || TT.isOSCygMing()">;
-
+def isWindowsMSVCEnvironment : RuntimeLibcallPredicate<
+  [{TT.isWindowsMSVCEnvironment()}]>;
 
 def isGNUEnvironment : RuntimeLibcallPredicate<"TT.isGNUEnvironment()">;
 def darwinHasSinCosStret : RuntimeLibcallPredicate<"darwinHasSinCosStret(TT)">;
@@ -365,6 +366,8 @@ def STACK_SMASH_HANDLER : RuntimeLibcall;
 // Safe stack
 def SAFESTACK_POINTER_ADDRESS : RuntimeLibcall;
 
+def SECURITY_CHECK_COOKIE : RuntimeLibcall;
+
 // Deoptimization
 def DEOPTIMIZE : RuntimeLibcall;
 
@@ -1005,6 +1008,10 @@ def __stack_smash_handler : RuntimeLibcallImpl<STACK_SMASH_HANDLER>;
 
 def __riscv_flush_icache : RuntimeLibcallImpl<RISCV_FLUSH_ICACHE>;
 
+def __security_check_cookie : RuntimeLibcallImpl<SECURITY_CHECK_COOKIE>;
+def __security_check_cookie_arm64ec : RuntimeLibcallImpl<SECURITY_CHECK_COOKIE,
+  "#__security_check_cookie_arm64ec">;
+
 //===----------------------------------------------------------------------===//
 // F128 libm Runtime Libcalls
 //===----------------------------------------------------------------------===//
@@ -1107,6 +1114,9 @@ defvar DarwinSinCosStret = LibcallImpls<(add __sincosf_stret, __sincos_stret),
                                         darwinHasSinCosStret>;
 defvar DarwinExp10 = LibcallImpls<(add __exp10f, __exp10), darwinHasExp10>;
 
+defvar SecurityCheckCookieIfWinMSVC =
+    LibcallImpls<(add __security_check_cookie), isWindowsMSVCEnvironment>;
+
 defvar LibmHasSinCosF32 = LibcallImpls<(add sincosf), hasSinCos>;
 defvar LibmHasSinCosF64 =  LibcallImpls<(add sincos), hasSinCos>;
 defvar LibmHasSinCosF80 = LibcallImpls<(add sincos_f80), hasSinCos>;
@@ -1211,6 +1221,7 @@ def AArch64SystemLibrary : SystemRuntimeLibrary<
        LibcallImpls<(add Int128RTLibcalls), isAArch64_ILP64>,
        LibcallImpls<(add bzero), isOSDarwin>,
        DarwinExp10, DarwinSinCosStret,
+       SecurityCheckCookieIfWinMSVC,
        LibmHasSinCosF32, LibmHasSinCosF64, LibmHasSinCosF128)
 >;
 
@@ -1227,7 +1238,8 @@ defset list<RuntimeLibcallImpl> WinArm64ECDefaultRuntimeLibcallImpls = {
 
 def WindowsARM64ECSystemLibrary
     : SystemRuntimeLibrary<isWindowsArm64EC,
-                           (add WinArm64ECDefaultRuntimeLibcallImpls)>;
+                           (add WinArm64ECDefaultRuntimeLibcallImpls,
+                                __security_check_cookie_arm64ec)>;
 
 //===----------------------------------------------------------------------===//
 // AMDGPU Runtime Libcalls
@@ -1479,6 +1491,7 @@ def ARMSystemLibrary
            LibmHasFrexpF128, LibmHasLdexpF128,
            WindowARMDivRemCalls,
            WindowARMFPIntCasts,
+           SecurityCheckCookieIfWinMSVC,
            AEABIDivRemCalls,
            DarwinSinCosStret, DarwinExp10,
            LibmHasSinCosF32, LibmHasSinCosF64, LibmHasSinCosF128,
@@ -2122,6 +2135,7 @@ defvar X86CommonLibcalls =
        LibmHasFrexpF80, LibmHasLdexpF80,
        LibcallImpls<(add frexp_f128, ldexp_f128), hasFrexplLdexplF128>,
        DefaultRuntimeLibcallImpls_f80,
+       SecurityCheckCookieIfWinMSVC,
        // FIXME: MSVCRT doesn't have powi. The f128 case is added as a
        // hack for one test relying on it.
        __powitf2_f128,

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -28609,14 +28609,16 @@ Value *AArch64TargetLowering::getIRStackGuard(IRBuilderBase &IRB) const {
 
 void AArch64TargetLowering::insertSSPDeclarations(Module &M) const {
   // MSVC CRT provides functionalities for stack protection.
-  if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment()) {
+  RTLIB::LibcallImpl SecurityCheckCookieLibcall =
+      getLibcallImpl(RTLIB::SECURITY_CHECK_COOKIE);
+  if (SecurityCheckCookieLibcall != RTLIB::Unsupported) {
     // MSVC CRT has a global variable holding security cookie.
     M.getOrInsertGlobal("__security_cookie",
                         PointerType::getUnqual(M.getContext()));
 
     // MSVC CRT has a function to validate security cookie.
     FunctionCallee SecurityCheckCookie =
-        M.getOrInsertFunction(Subtarget->getSecurityCheckCookieName(),
+        M.getOrInsertFunction(getLibcallImplName(SecurityCheckCookieLibcall),
                               Type::getVoidTy(M.getContext()),
                               PointerType::getUnqual(M.getContext()));
     if (Function *F = dyn_cast<Function>(SecurityCheckCookie.getCallee())) {
@@ -28637,8 +28639,10 @@ Value *AArch64TargetLowering::getSDagStackGuard(const Module &M) const {
 
 Function *AArch64TargetLowering::getSSPStackGuardCheck(const Module &M) const {
   // MSVC CRT has a function to validate security cookie.
-  if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment())
-    return M.getFunction(Subtarget->getSecurityCheckCookieName());
+  RTLIB::LibcallImpl SecurityCheckCookieLibcall =
+      getLibcallImpl(RTLIB::SECURITY_CHECK_COOKIE);
+  if (SecurityCheckCookieLibcall != RTLIB::Unsupported)
+    return M.getFunction(getLibcallImplName(SecurityCheckCookieLibcall));
   return TargetLowering::getSSPStackGuardCheck(M);
 }
 

llvm/lib/Target/AArch64/AArch64Subtarget.h

@@ -451,12 +451,6 @@ class AArch64Subtarget final : public AArch64GenSubtargetInfo {
     return "__chkstk";
   }
 
-  const char* getSecurityCheckCookieName() const {
-    if (isWindowsArm64EC())
-      return "#__security_check_cookie_arm64ec";
-    return "__security_check_cookie";
-  }
-
   /// Choose a method of checking LR before performing a tail call.
   AArch64PAuth::AuthCheckMethod
   getAuthenticatedLRCheckMethod(const MachineFunction &MF) const;

llvm/lib/Target/ARM/ARMISelLowering.cpp

@@ -21363,7 +21363,9 @@ bool ARMTargetLowering::useLoadStackGuardNode(const Module &M) const {
 }
 
 void ARMTargetLowering::insertSSPDeclarations(Module &M) const {
-  if (!Subtarget->getTargetTriple().isWindowsMSVCEnvironment())
+  RTLIB::LibcallImpl SecurityCheckCookieLibcall =
+      getLibcallImpl(RTLIB::SECURITY_CHECK_COOKIE);
+  if (SecurityCheckCookieLibcall == RTLIB::Unsupported)
     return TargetLowering::insertSSPDeclarations(M);
 
   // MSVC CRT has a global variable holding security cookie.
@@ -21372,23 +21374,32 @@ void ARMTargetLowering::insertSSPDeclarations(Module &M) const {
 
   // MSVC CRT has a function to validate security cookie.
   FunctionCallee SecurityCheckCookie = M.getOrInsertFunction(
-      "__security_check_cookie", Type::getVoidTy(M.getContext()),
-      PointerType::getUnqual(M.getContext()));
+      getLibcallImplName(SecurityCheckCookieLibcall),
+      Type::getVoidTy(M.getContext()), PointerType::getUnqual(M.getContext()));
   if (Function *F = dyn_cast<Function>(SecurityCheckCookie.getCallee()))
     F->addParamAttr(0, Attribute::AttrKind::InReg);
 }
 
 Value *ARMTargetLowering::getSDagStackGuard(const Module &M) const {
-  // MSVC CRT has a global variable holding security cookie.
-  if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment())
+  RTLIB::LibcallImpl SecurityCheckCookieLibcall =
+      getLibcallImpl(RTLIB::SECURITY_CHECK_COOKIE);
+  if (SecurityCheckCookieLibcall != RTLIB::Unsupported) {
+    // MSVC CRT has a global variable holding security cookie.
+    //
+    // FIXME: We have a libcall entry for the correlated check function, but not
+    // the global name.
     return M.getGlobalVariable("__security_cookie");
+  }
+
   return TargetLowering::getSDagStackGuard(M);
 }
 
 Function *ARMTargetLowering::getSSPStackGuardCheck(const Module &M) const {
   // MSVC CRT has a function to validate security cookie.
-  if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment())
-    return M.getFunction("__security_check_cookie");
+  RTLIB::LibcallImpl SecurityCheckCookie =
+      getLibcallImpl(RTLIB::SECURITY_CHECK_COOKIE);
+  if (SecurityCheckCookie != RTLIB::Unsupported)
+    return M.getFunction(getLibcallImplName(SecurityCheckCookie));
   return TargetLowering::getSSPStackGuardCheck(M);
 }