commit 918f38ab2420bbdc350a6ec8c6ba6b09e37126b2
author Andrew Trick <atrick@apple.com> Fri Apr 20 20:05:21 2012 +0000
committer Andrew Trick <atrick@apple.com> Fri Apr 20 20:05:21 2012 +0000
tree b5f71cd331a4e0e99b8e9f96d7bfe1df1ce6bde1
parent d4786e221c679fced994993d9ee7228572d4b148

misched: initialize BB

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155226 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/ScheduleDAGInstrs.cpp

diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp
index d46eb89..ae49b05 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -126,7 +126,8 @@
   return 0;
 }
 
-void ScheduleDAGInstrs::startBlock(MachineBasicBlock *BB) {
+void ScheduleDAGInstrs::startBlock(MachineBasicBlock *bb) {
+  BB = bb;
   LoopRegs.Deps.clear();
   if (MachineLoop *ML = MLI.getLoopFor(BB))
     if (BB == ML->getLoopLatch())
@@ -134,6 +135,7 @@
 }
 
 void ScheduleDAGInstrs::finishBlock() {
+  BB = 0;
   // Nothing to do.
 }
 
@@ -159,7 +161,7 @@
                                     MachineBasicBlock::iterator begin,
                                     MachineBasicBlock::iterator end,
                                     unsigned endcount) {
-  BB = bb;
+  assert(bb == BB && "startBlock should set BB");
   RegionBegin = begin;
   RegionEnd = end;
   EndIndex = endcount;