Fix PR3522. It's not safe to sink into landing pad BB's.

llvm-svn: 64582
2009-02-15 08:36:12 +00:00
parent 37959570af
commit 2510436e20
2 changed files with 35 additions and 0 deletions
--- a/llvm/lib/CodeGen/MachineSink.cpp
+++ b/llvm/lib/CodeGen/MachineSink.cpp
@@ -212,6 +212,11 @@ bool MachineSinking::SinkInstruction(MachineInstr *MI, bool &SawStore) {
  // 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);