From 5e5974f51ad079a3ed890ca8be1d3f50150320ad Mon Sep 17 00:00:00 2001
From: Manman Ren <mren@apple.com>
Date: Wed, 27 Feb 2013 02:11:57 +0000
Subject: SelectionDAG: If llvm.donothing has a landingpad, we should clear
 CurrentCallSite to avoid an assertion failure:
 assert(MMI.getCurrentCallSite() == 0 && "Overlapping call sites!");

rdar://problem/13228754


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176154 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index b8ab2a9..e3c2c2e 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1872,6 +1872,13 @@ void SelectionDAGBuilder::visitInvoke(const InvokeInst &I) {
     visitInlineAsm(&I);
   else if (Fn && Fn->isIntrinsic()) {
     assert(Fn->getIntrinsicID() == Intrinsic::donothing);
+    // If donothing has a landingpad, we should clear CurrentCallSite.
+    if (LandingPad) {
+      MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
+      unsigned CallSiteIndex = MMI.getCurrentCallSite();
+      if (CallSiteIndex)
+        MMI.setCurrentCallSite(0);
+    }
     // Ignore invokes to @llvm.donothing: jump directly to the next BB.
   } else
     LowerCallTo(&I, getValue(Callee), false, LandingPad);
-- 
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