#include "llvm/ADT/STLExtras.h"
using namespace llvm;
-namespace {
- static Statistic NumStores("ra-simple", "Number of stores added");
- static Statistic NumLoads ("ra-simple", "Number of loads added");
+STATISTIC(NumStores, "Number of stores added");
+STATISTIC(NumLoads , "Number of loads added");
+namespace {
static RegisterRegAlloc
simpleRegAlloc("simple", " simple register allocator",
createSimpleRegisterAllocator);
class VISIBILITY_HIDDEN RegAllocSimple : public MachineFunctionPass {
+ public:
+ static char ID;
+ RegAllocSimple() : MachineFunctionPass((intptr_t)&ID) {}
+ private:
MachineFunction *MF;
const TargetMachine *TM;
const MRegisterInfo *RegInfo;
- bool *PhysRegsEverUsed;
// StackSlotForVirtReg - Maps SSA Regs => frame index on the stack where
// these values are spilled
void spillVirtReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned VirtReg, unsigned PhysReg);
};
-
+ char RegAllocSimple::ID = 0;
}
/// getStackSpaceFor - This allocates space for the specified virtual
unsigned PhysReg = *(RI+regIdx);
if (!RegsUsed[PhysReg]) {
- PhysRegsEverUsed[PhysReg] = true;
+ MF->setPhysRegUsed(PhysReg);
return PhysReg;
}
}
if (Desc.ImplicitDefs) {
for (Regs = Desc.ImplicitDefs; *Regs; ++Regs) {
RegsUsed[*Regs] = true;
- PhysRegsEverUsed[*Regs] = true;
+ MF->setPhysRegUsed(*Regs);
}
}
TM = &MF->getTarget();
RegInfo = TM->getRegisterInfo();
- PhysRegsEverUsed = new bool[RegInfo->getNumRegs()];
- std::fill(PhysRegsEverUsed, PhysRegsEverUsed+RegInfo->getNumRegs(), false);
- Fn.setUsedPhysRegs(PhysRegsEverUsed);
-
// Loop over all of the basic blocks, eliminating virtual register references
for (MachineFunction::iterator MBB = Fn.begin(), MBBe = Fn.end();
MBB != MBBe; ++MBB)