revert bill's patches in an attempt to fix the buildbot.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108419 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CriticalAntiDepBreaker.cpp b/lib/CodeGen/CriticalAntiDepBreaker.cpp
index 9d48665..e3746a9 100644
--- a/lib/CodeGen/CriticalAntiDepBreaker.cpp
+++ b/lib/CodeGen/CriticalAntiDepBreaker.cpp
@@ -34,9 +34,6 @@
TRI(MF.getTarget().getRegisterInfo()),
AllocatableSet(TRI->getAllocatableSet(MF))
{
- Classes.reserve(TRI->getNumRegs());
- KillIndices.reserve(TRI->getNumRegs());
- DefIndices.reserve(TRI->getNumRegs());
}
CriticalAntiDepBreaker::~CriticalAntiDepBreaker() {
@@ -44,7 +41,8 @@
void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
// Clear out the register class data.
- Classes.clear();
+ std::fill(Classes, array_endof(Classes),
+ static_cast<const TargetRegisterClass *>(0));
// Initialize the indices to indicate that no registers are live.
const unsigned BBSize = BB->size();