Fix PR3522. It's not safe to sink into landing pad BB's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64582 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index a85a41f..468bd01 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/lib/CodeGen/MachineSink.cpp
@@ -212,6 +212,11 @@
// If there are no outputs, it must have side-effects.
if (SuccToSinkTo == 0)
return false;
+
+ // It's not safe to sink instructions to EH landing pad. Control flow into
+ // landing pad is implicitly defined.
+ if (SuccToSinkTo->isLandingPad())
+ return false;
DEBUG(cerr << "Sink instr " << *MI);
DEBUG(cerr << "to block " << *SuccToSinkTo);