[SSP] Remove llvm.stackprotectorcheck.

This is a cleanup patch for SSP support in LLVM. There is no functional change.
llvm.stackprotectorcheck is not needed, because SelectionDAG isn't
actually lowering it in SelectBasicBlock; rather, it adds check code in
FinishBasicBlock, ignoring the position where the intrinsic is inserted
(See FindSplitPointForStackProtector()).

llvm-svn: 265851

1 files changed, 15 insertions, 2 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 4c2e54f8102..1931c7f4263 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -2193,9 +2193,9 @@ unsigned X86TargetLowering::getAddressSpace() const {
   return 256;
 }
 
-Value *X86TargetLowering::getStackCookieLocation(IRBuilder<> &IRB) const {
+Value *X86TargetLowering::getIRStackGuard(IRBuilder<> &IRB) const {
   if (!Subtarget.isTargetLinux())
-    return TargetLowering::getStackCookieLocation(IRB);
+    return TargetLowering::getIRStackGuard(IRB);
 
   // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
   // %gs:0x14 on i386
@@ -2206,6 +2206,19 @@ Value *X86TargetLowering::getStackCookieLocation(IRBuilder<> &IRB) const {
       Type::getInt8PtrTy(IRB.getContext())->getPointerTo(AddressSpace));
 }
 
+void X86TargetLowering::insertSSPDeclarations(Module &M) const {
+  if (!Subtarget.isTargetLinux())
+    TargetLowering::insertSSPDeclarations(M);
+  else
+    llvm_unreachable("X86 Linux supports customized IR stack guard load");
+}
+
+Value *X86TargetLowering::getSDStackGuard(const Module &M) const {
+  if (!Subtarget.isTargetLinux())
+    return TargetLowering::getSDStackGuard(M);
+  llvm_unreachable("X86 Linux supports customized IR stack guard load");
+}
+
 Value *X86TargetLowering::getSafeStackPointerLocation(IRBuilder<> &IRB) const {
   if (!Subtarget.isTargetAndroid())
     return TargetLowering::getSafeStackPointerLocation(IRB);