Replace std::vector<bool> with BitVector.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46104 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 2941824..3654efd 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -91,13 +91,15 @@
// scavenged. If a virtual register has simply been rematerialized, there
// is no reason to spill it to memory when we need the register back.
//
- std::vector<bool> VirtRegModified;
+ BitVector VirtRegModified;
void markVirtRegModified(unsigned Reg, bool Val = true) {
assert(MRegisterInfo::isVirtualRegister(Reg) && "Illegal VirtReg!");
Reg -= MRegisterInfo::FirstVirtualRegister;
- if (VirtRegModified.size() <= Reg) VirtRegModified.resize(Reg+1);
- VirtRegModified[Reg] = Val;
+ if (Val)
+ VirtRegModified.set(Reg);
+ else
+ VirtRegModified.reset(Reg);
}
bool isVirtRegModified(unsigned Reg) const {
@@ -819,7 +821,9 @@
// initialize the virtual->physical register map to have a 'null'
// mapping for all virtual registers
- Virt2PhysRegMap.grow(MF->getRegInfo().getLastVirtReg());
+ unsigned LastVirtReg = MF->getRegInfo().getLastVirtReg();
+ Virt2PhysRegMap.grow(LastVirtReg);
+ VirtRegModified.resize(LastVirtReg-MRegisterInfo::FirstVirtualRegister);
// Loop over all of the basic blocks, eliminating virtual register references
for (MachineFunction::iterator MBB = Fn.begin(), MBBe = Fn.end();