1//===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the methods in the TargetOptions.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/CodeGen/MachineFrameInfo.h"
14#include "llvm/CodeGen/MachineFunction.h"
15#include "llvm/CodeGen/TargetFrameLowering.h"
16#include "llvm/CodeGen/TargetSubtargetInfo.h"
17#include "llvm/IR/Function.h"
18#include "llvm/Target/TargetOptions.h"
19using namespace llvm;
20
21/// DisableFramePointerElim - This returns true if frame pointer elimination
22/// optimization should be disabled for the given machine function.
23bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
24 FramePointerKind FP = MF.getFrameInfo().getFramePointerPolicy();
25 switch (FP) {
26 case FramePointerKind::All:
27 return true;
28 case FramePointerKind::NonLeaf:
29 case FramePointerKind::NonLeafNoReserve:
30 return MF.getFrameInfo().hasCalls();
31 case FramePointerKind::None:
32 case FramePointerKind::Reserved:
33 return false;
34 }
35 llvm_unreachable("unknown frame pointer flag");
36}
37
38bool TargetOptions::FramePointerIsReserved(const MachineFunction &MF) const {
39 FramePointerKind FP = MF.getFrameInfo().getFramePointerPolicy();
40 switch (FP) {
41 case FramePointerKind::All:
42 case FramePointerKind::NonLeaf:
43 case FramePointerKind::Reserved:
44 return true;
45 case FramePointerKind::NonLeafNoReserve:
46 return MF.getFrameInfo().hasCalls();
47 case FramePointerKind::None:
48 return false;
49 }
50 llvm_unreachable("unknown frame pointer flag");
51}
52
53/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
54/// that the rounding mode of the FPU can change from its default.
55bool TargetOptions::HonorSignDependentRoundingFPMath() const {
56 return HonorSignDependentRoundingFPMathOption;
57}
58
59/// NOTE: There are targets that still do not support the debug entry values
60/// production and that is being controlled with the SupportsDebugEntryValues.
61/// In addition, SCE debugger does not have the feature implemented, so prefer
62/// not to emit the debug entry values in that case.
63/// The EnableDebugEntryValues can be used for the testing purposes.
64bool TargetOptions::ShouldEmitDebugEntryValues() const {
65 return (SupportsDebugEntryValues && DebuggerTuning != DebuggerKind::SCE) ||
66 EnableDebugEntryValues;
67}
68