1//===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the methods in the TargetOptions. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/CodeGen/MachineFunction.h" 15#include "llvm/CodeGen/MachineFrameInfo.h" 16#include "llvm/Target/TargetOptions.h" 17using namespace llvm; 18 19/// DisableFramePointerElim - This returns true if frame pointer elimination 20/// optimization should be disabled for the given machine function. 21bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const { 22 // Check to see if we should eliminate non-leaf frame pointers and then 23 // check to see if we should eliminate all frame pointers. 24 if (NoFramePointerElimNonLeaf && !NoFramePointerElim) { 25 const MachineFrameInfo *MFI = MF.getFrameInfo(); 26 return MFI->hasCalls(); 27 } 28 29 return NoFramePointerElim; 30} 31 32/// LessPreciseFPMAD - This flag return true when -enable-fp-mad option 33/// is specified on the command line. When this flag is off(default), the 34/// code generator is not allowed to generate mad (multiply add) if the 35/// result is "less precise" than doing those operations individually. 36bool TargetOptions::LessPreciseFPMAD() const { 37 return UnsafeFPMath || LessPreciseFPMADOption; 38} 39 40/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume 41/// that the rounding mode of the FPU can change from its default. 42bool TargetOptions::HonorSignDependentRoundingFPMath() const { 43 return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption; 44} 45 46/// getTrapFunctionName - If this returns a non-empty string, this means isel 47/// should lower Intrinsic::trap to a call to the specified function name 48/// instead of an ISD::TRAP node. 49StringRef TargetOptions::getTrapFunctionName() const { 50 return TrapFuncName; 51} 52 53