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Replace std::vector<bool> with BitVector.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46104 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-01-17 00:35:26 +00:00
parent 02c4285643
commit 644340a9bd
1 changed files with 8 additions and 4 deletions
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12
lib/CodeGen/RegAllocLocal.cpp
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@ -91,13 +91,15 @@ namespace {
// 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 @@ bool RALocal::runOnMachineFunction(MachineFunction &Fn) {
// 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();