llvm-6502/lib/CodeGen/TargetOptionsImpl.cpp
Eric Christopher ce0f74d412 Migrate ABIName to MCTargetOptions so that it can be shared between
the TargetMachine level and the MC level.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225891 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-14 00:50:31 +00:00

61 lines
2.4 KiB
C++

//===-- 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/IR/Function.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.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 (MF.getFunction()->hasFnAttribute("no-frame-pointer-elim-non-leaf") &&
!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;
}
/// getCFIFuncName - If this returns a non-empty string, then it is the name of
/// the function that gets called on CFI violations in CFI non-enforcing mode
/// (!TargetOptions::CFIEnforcing).
StringRef TargetOptions::getCFIFuncName() const {
return CFIFuncName;
}