diff options
Diffstat (limited to 'llvm/lib/CodeGen/RegAllocLocal.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegAllocLocal.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/RegAllocLocal.cpp b/llvm/lib/CodeGen/RegAllocLocal.cpp index acd3ddeccf2..174e394774b 100644 --- a/llvm/lib/CodeGen/RegAllocLocal.cpp +++ b/llvm/lib/CodeGen/RegAllocLocal.cpp @@ -220,10 +220,10 @@ namespace { /// getReg - Find a physical register to hold the specified virtual /// register. If all compatible physical registers are used, this method /// spills the last used virtual register to the stack, and uses that - /// register. - /// + /// register. If NoFree is true, that means the caller knows there isn't + /// a free register, do not call getFreeReg(). unsigned getReg(MachineBasicBlock &MBB, MachineInstr *MI, - unsigned VirtReg); + unsigned VirtReg, bool NoFree = false); /// reloadVirtReg - This method transforms the specified specified virtual /// register use to refer to a physical register. This method may do this @@ -398,11 +398,11 @@ unsigned RALocal::getFreeReg(const TargetRegisterClass *RC) { /// the last used virtual register to the stack, and uses that register. /// unsigned RALocal::getReg(MachineBasicBlock &MBB, MachineInstr *I, - unsigned VirtReg) { + unsigned VirtReg, bool NoFree) { const TargetRegisterClass *RC = MF->getRegInfo().getRegClass(VirtReg); // First check to see if we have a free register of the requested type... - unsigned PhysReg = getFreeReg(RC); + unsigned PhysReg = NoFree ? 0 : getFreeReg(RC); // If we didn't find an unused register, scavenge one now! if (PhysReg == 0) { @@ -498,7 +498,7 @@ MachineInstr *RALocal::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI, } else { // No registers available. // Force some poor hapless value out of the register file to // make room for the new register, and reload it. - PhysReg = getReg(MBB, MI, VirtReg); + PhysReg = getReg(MBB, MI, VirtReg, true); } markVirtRegModified(VirtReg, false); // Note that this reg was just reloaded |
