commit e7ea8aa48a266f22f2c07003313e49174c6d9037
author Andrew Trick <atrick@apple.com> Sat Dec 01 01:22:38 2012 +0000
committer Andrew Trick <atrick@apple.com> Sat Dec 01 01:22:38 2012 +0000
tree cc0143fdaf852098e606567e575c195b7f27631f
parent fe9d110f3a3cb7488cd74b7e2eb89b16d9ba22d3

misched: fix RegionBegin when DebugValues get shuffled to the top.

assert (RemainingInstrs == 0 && "Instruction count mismatch!")

rdar://12776937.

llvm-svn: 169069

llvm/lib/CodeGen/MachineScheduler.cpp

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index b3e38f6..cc7aabd 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -674,6 +674,8 @@
     std::pair<MachineInstr *, MachineInstr *> P = *prior(DI);
     MachineInstr *DbgValue = P.first;
     MachineBasicBlock::iterator OrigPrevMI = P.second;
+    if (&*RegionBegin == DbgValue)
+      ++RegionBegin;
     BB->splice(++OrigPrevMI, BB, DbgValue);
     if (OrigPrevMI == llvm::prior(RegionEnd))
       RegionEnd = DbgValue;