[ARM64] [Windows] Handle funclets

This patch adds support for funclets in frame lowering and ISel
lowering. Together with D50288 and D50166, it enables C++ exception
handling.

Patch by Sanjin Sijaric, with some fixes by me.

Differential Revision: https://reviews.llvm.org/D51524

llvm-svn: 346568

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp b/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
index 6e1824f632e..07295989ec8 100644
--- a/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
+++ b/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
@@ -269,4 +269,17 @@ void AArch64MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
     if (lowerOperand(MO, MCOp))
       OutMI.addOperand(MCOp);
   }
+
+  switch (OutMI.getOpcode()) {
+  case AArch64::CATCHRET:
+    OutMI = MCInst();
+    OutMI.setOpcode(AArch64::RET);
+    OutMI.addOperand(MCOperand::createReg(AArch64::LR));
+    break;
+  case AArch64::CLEANUPRET:
+    OutMI = MCInst();
+    OutMI.setOpcode(AArch64::RET);
+    OutMI.addOperand(MCOperand::createReg(AArch64::LR));
+    break;
+  }
 }