using namespace llvm;
static cl::opt<bool>
-ForceAllBaseRegAlloc("arm-force-base-reg-alloc", cl::Hidden, cl::init(false),
- cl::desc("Force use of virtual base registers for stack load/store"));
-static cl::opt<bool>
EnableLocalStackAlloc("enable-local-stack-alloc", cl::init(true), cl::Hidden,
cl::desc("Enable pre-regalloc stack frame index allocation"));
-static cl::opt<bool>
-EnableBasePointer("arm-use-base-pointer", cl::Hidden, cl::init(true),
- cl::desc("Enable use of a base pointer for complex stack frames"));
ARMBaseRegisterInfo::ARMBaseRegisterInfo(const ARMBaseInstrInfo &tii,
const ARMSubtarget &sti)
const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
- if (!EnableBasePointer)
- return false;
-
// When outgoing call frames are so large that we adjust the stack pointer
// around the call, we can no longer use the stack pointer to reach the
// emergency spill slot.
// pointer adjustments around calls.
if (MF.getTarget().getFrameLowering()->hasReservedCallFrame(MF))
return true;
- if (!EnableBasePointer)
- return false;
// A base pointer is required and allowed. Check that it isn't too late to
// reserve it.
return MRI->canReserveReg(BasePtr);
case ARM::VLDRS: case ARM::VLDRD:
case ARM::VSTRS: case ARM::VSTRD:
case ARM::tSTRspi: case ARM::tLDRspi:
- if (ForceAllBaseRegAlloc)
- return true;
break;
default:
return false;