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/MachineFrameInfo.h" 15 #include "llvm/CodeGen/MachineFunction.h" 16 #include "llvm/CodeGen/TargetFrameLowering.h" 17 #include "llvm/CodeGen/TargetSubtargetInfo.h" 18 #include "llvm/IR/Function.h" 19 #include "llvm/IR/Module.h" 20 #include "llvm/Target/TargetOptions.h" 21 using namespace llvm; 22 23 /// DisableFramePointerElim - This returns true if frame pointer elimination 24 /// optimization should be disabled for the given machine function. DisableFramePointerElim(const MachineFunction & MF) const25bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const { 26 // Check to see if we should eliminate all frame pointers. 27 if (MF.getSubtarget().getFrameLowering()->noFramePointerElim(MF)) 28 return true; 29 30 // Check to see if we should eliminate non-leaf frame pointers. 31 if (MF.getFunction().hasFnAttribute("no-frame-pointer-elim-non-leaf")) 32 return MF.getFrameInfo().hasCalls(); 33 34 return false; 35 } 36 37 /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume 38 /// that the rounding mode of the FPU can change from its default. HonorSignDependentRoundingFPMath() const39bool TargetOptions::HonorSignDependentRoundingFPMath() const { 40 return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption; 41 } 42