Revert rG6078f2fedcac5797ac39ee5ef3fd7a35ef1202d5 - "[AArch64][GlobalISel]: Support @llvm.{return,frame}address selection."

These intrinsics expand to a variable number of instructions so just like in
ISelLowering.cpp we use custom code to deal with them.

Committing Tim's original patch.

Differential Revision: https://reviews.llvm.org/D65656
----
Breaks EXPENSIVE_CHECKS builds.

1 files changed, 1 insertions, 38 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
index 9f9cc7d7c9e..b9ac2657e1c 100644
--- a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
@@ -4091,7 +4091,7 @@ bool AArch64InstructionSelector::selectIntrinsic(
   switch (IntrinID) {
   default:
     break;
-  case Intrinsic::aarch64_crypto_sha1h: {
+  case Intrinsic::aarch64_crypto_sha1h:
     Register DstReg = I.getOperand(0).getReg();
     Register SrcReg = I.getOperand(2).getReg();
 
@@ -4130,43 +4130,6 @@ bool AArch64InstructionSelector::selectIntrinsic(
     I.eraseFromParent();
     return true;
   }
-  case Intrinsic::frameaddress:
-  case Intrinsic::returnaddress: {
-    MachineFunction &MF = *I.getParent()->getParent();
-    MachineFrameInfo &MFI = MF.getFrameInfo();
-
-    unsigned Depth = I.getOperand(2).getImm();
-    Register DstReg = I.getOperand(0).getReg();
-    RBI.constrainGenericRegister(DstReg, AArch64::GPR64RegClass, MRI);
-
-    if (Depth == 0 && IntrinID == Intrinsic::returnaddress) {
-      MFI.setReturnAddressIsTaken(true);
-      MF.addLiveIn(AArch64::LR, &AArch64::GPR64RegClass);
-      I.getParent()->addLiveIn(AArch64::LR);
-      MIRBuilder.buildCopy({DstReg}, {Register(AArch64::LR)});
-      I.eraseFromParent();
-      return true;
-    }
-
-    MFI.setFrameAddressIsTaken(true);
-    Register FrameAddr(AArch64::FP);
-    while (Depth--) {
-      Register NextFrame = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
-      MIRBuilder.buildInstr(AArch64::LDRXui, {NextFrame}, {FrameAddr}).addImm(0);
-      FrameAddr = NextFrame;
-    }
-
-    if (IntrinID == Intrinsic::frameaddress)
-      MIRBuilder.buildCopy({DstReg}, {FrameAddr});
-    else {
-      MFI.setReturnAddressIsTaken(true);
-      MIRBuilder.buildInstr(AArch64::LDRXui, {DstReg}, {FrameAddr}).addImm(1);
-    }
-
-    I.eraseFromParent();
-    return true;
-  }
-  }
   return false;
 }