Current Path : /usr/src/contrib/llvm/lib/CodeGen/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //usr/src/contrib/llvm/lib/CodeGen/TargetOptionsImpl.cpp |
//===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file implements the methods in the TargetOptions. // //===----------------------------------------------------------------------===// #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineFrameInfo.h" #include "llvm/Target/TargetOptions.h" using namespace llvm; /// DisableFramePointerElim - This returns true if frame pointer elimination /// optimization should be disabled for the given machine function. bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const { // Check to see if we should eliminate non-leaf frame pointers and then // check to see if we should eliminate all frame pointers. if (NoFramePointerElimNonLeaf && !NoFramePointerElim) { const MachineFrameInfo *MFI = MF.getFrameInfo(); return MFI->hasCalls(); } return NoFramePointerElim; } /// LessPreciseFPMAD - This flag return true when -enable-fp-mad option /// is specified on the command line. When this flag is off(default), the /// code generator is not allowed to generate mad (multiply add) if the /// result is "less precise" than doing those operations individually. bool TargetOptions::LessPreciseFPMAD() const { return UnsafeFPMath || LessPreciseFPMADOption; } /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume /// that the rounding mode of the FPU can change from its default. bool TargetOptions::HonorSignDependentRoundingFPMath() const { return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption; } /// getTrapFunctionName - If this returns a non-empty string, this means isel /// should lower Intrinsic::trap to a call to the specified function name /// instead of an ISD::TRAP node. StringRef TargetOptions::getTrapFunctionName() const { return TrapFuncName; }