Fix a use-after-free.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109468 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CriticalAntiDepBreaker.cpp b/lib/CodeGen/CriticalAntiDepBreaker.cpp
index cb15166cd4ae3e795bcff872566f9fb681f70289..98d4d413201815d174864e32ca8178c6ed47c8cd 100644 (file)
--- a/lib/CodeGen/CriticalAntiDepBreaker.cpp
+++ b/lib/CodeGen/CriticalAntiDepBreaker.cpp
@@ -41,8 +41,6 @@ CriticalAntiDepBreaker::~CriticalAntiDepBreaker() {
 }
 
 void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
-  Classes.clear();
-
   const unsigned BBSize = BB->size();
   for (unsigned i = 0, e = TRI->getNumRegs(); i != e; ++i) {
     // Clear out the register class data.