Revert "[safestack] Fast access to the unsafe stack pointer on AArch64/Android."

[oota-llvm.git] / lib / Target / AArch64 / AArch64ISelLowering.cpp

diff --git a/lib/Target/AArch64/AArch64ISelLowering.cpp b/lib/Target/AArch64/AArch64ISelLowering.cpp
index 93cb5ecdc6ea68d227fc600da9733c6d827e606b..b8e30921e8a8977ae6d875c648fc7b7234a19169 100644 (file)
--- a/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -9921,19 +9921,3 @@ bool AArch64TargetLowering::shouldNormalizeToSelectSequence(LLVMContext &,
                                                             EVT) const {
   return false;
 }
-
-Value *AArch64TargetLowering::getSafeStackPointerLocation(IRBuilder<> &IRB) const {
-  if (!Subtarget->isTargetAndroid())
-    return TargetLowering::getSafeStackPointerLocation(IRB);
-
-  // Android provides a fixed TLS slot for the SafeStack pointer. See the
-  // definition of TLS_SLOT_SAFESTACK in
-  // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h
-  const unsigned TlsOffset = 0x48;
-  Module *M = IRB.GetInsertBlock()->getParent()->getParent();
-  Function *ThreadPointerFunc =
-      Intrinsic::getDeclaration(M, Intrinsic::aarch64_thread_pointer);
-  return IRB.CreatePointerCast(
-      IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), TlsOffset),
-      Type::getInt8PtrTy(IRB.getContext())->getPointerTo(0));
-}