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Nuke ifdef'd out code

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15777 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-08-15 22:03:57 +00:00
parent 913cbd65dc
commit 3cc03be51a
1 changed files with 0 additions and 33 deletions
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33
lib/CodeGen/RegAllocLocal.cpp
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@ -356,39 +356,6 @@ unsigned RA::getFreeReg(const TargetRegisterClass *RC) {
///
void RA::liberatePhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I,
unsigned PhysReg) {
// FIXME: This code checks to see if a register is available, but it really
// wants to know if a reg is available BEFORE the instruction executes. If
// called after killed operands are freed, it runs the risk of reallocating a
// used operand...
#if 0
if (isPhysRegAvailable(PhysReg)) return; // Already available...
// Check to see if the register is directly used, not indirectly used through
// aliases. If aliased registers are the ones actually used, we cannot be
// sure that we will be able to save the whole thing if we do a reg-reg copy.
if (PhysRegsUsed[PhysReg] != -1) {
// The virtual register held...
unsigned VirtReg = PhysRegsUsed[PhysReg]->second;
// Check to see if there is a compatible register available. If so, we can
// move the value into the new register...
//
const TargetRegisterClass *RC = RegInfo->getRegClass(PhysReg);
if (unsigned NewReg = getFreeReg(RC)) {
// Emit the code to copy the value...
RegInfo->copyRegToReg(MBB, I, NewReg, PhysReg, RC);
// Update our internal state to indicate that PhysReg is available and Reg
// isn't.
getVirt2PhysRegMapSlot[VirtReg] = 0;
removePhysReg(PhysReg); // Free the physreg
// Move reference over to new register...
assignVirtToPhysReg(VirtReg, NewReg);
return;
}
}
#endif
spillPhysReg(MBB, I, PhysReg);
}