| //===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the methods in the TargetOptions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/CodeGen/MachineFrameInfo.h" |
| #include "llvm/CodeGen/MachineFunction.h" |
| #include "llvm/CodeGen/TargetFrameLowering.h" |
| #include "llvm/CodeGen/TargetSubtargetInfo.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/Module.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 the target want to forcably keep frame pointer. |
| if (MF.getSubtarget().getFrameLowering()->keepFramePointer(MF)) |
| return true; |
| |
| const Function &F = MF.getFunction(); |
| |
| if (!F.hasFnAttribute("frame-pointer")) |
| return false; |
| StringRef FP = F.getFnAttribute("frame-pointer").getValueAsString(); |
| if (FP == "all") |
| return true; |
| if (FP == "non-leaf") |
| return MF.getFrameInfo().hasCalls(); |
| if (FP == "none") |
| return false; |
| llvm_unreachable("unknown frame pointer flag"); |
| } |
| |
| /// 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; |
| } |
| |
| /// NOTE: There are targets that still do not support the debug entry values |
| /// production and that is being controlled with the SupportsDebugEntryValues. |
| /// In addition, SCE debugger does not have the feature implemented, so prefer |
| /// not to emit the debug entry values in that case. |
| /// The EnableDebugEntryValues can be used for the testing purposes. |
| bool TargetOptions::ShouldEmitDebugEntryValues() const { |
| return (SupportsDebugEntryValues && DebuggerTuning != DebuggerKind::SCE) || |
| EnableDebugEntryValues; |
| } |