1 //===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the methods in the TargetOptions.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/MachineFunction.h"
15 #include "llvm/CodeGen/MachineFrameInfo.h"
16 #include "llvm/Target/TargetOptions.h"
19 /// DisableFramePointerElim - This returns true if frame pointer elimination
20 /// optimization should be disabled for the given machine function.
21 bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
22 // Check to see if we should eliminate non-leaf frame pointers and then
23 // check to see if we should eliminate all frame pointers.
24 if (NoFramePointerElimNonLeaf && !NoFramePointerElim) {
25 const MachineFrameInfo *MFI = MF.getFrameInfo();
26 return MFI->hasCalls();
29 return NoFramePointerElim;
32 /// LessPreciseFPMAD - This flag return true when -enable-fp-mad option
33 /// is specified on the command line. When this flag is off(default), the
34 /// code generator is not allowed to generate mad (multiply add) if the
35 /// result is "less precise" than doing those operations individually.
36 bool TargetOptions::LessPreciseFPMAD() const {
37 return UnsafeFPMath || LessPreciseFPMADOption;
40 /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
41 /// that the rounding mode of the FPU can change from its default.
42 bool TargetOptions::HonorSignDependentRoundingFPMath() const {
43 return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
46 /// getTrapFunctionName - If this returns a non-empty string, this means isel
47 /// should lower Intrinsic::trap to a call to the specified function name
48 /// instead of an ISD::TRAP node.
49 StringRef TargetOptions::getTrapFunctionName() const {
53 bool TargetOptions::operator==(const TargetOptions &TO) {
54 #define ARE_EQUAL(X) X == TO.X
56 ARE_EQUAL(UnsafeFPMath) &&
57 ARE_EQUAL(NoInfsFPMath) &&
58 ARE_EQUAL(NoNaNsFPMath) &&
59 ARE_EQUAL(HonorSignDependentRoundingFPMathOption) &&
60 ARE_EQUAL(UseSoftFloat) &&
61 ARE_EQUAL(NoZerosInBSS) &&
62 ARE_EQUAL(JITEmitDebugInfo) &&
63 ARE_EQUAL(JITEmitDebugInfoToDisk) &&
64 ARE_EQUAL(GuaranteedTailCallOpt) &&
65 ARE_EQUAL(DisableTailCalls) &&
66 ARE_EQUAL(StackAlignmentOverride) &&
67 ARE_EQUAL(RealignStack) &&
68 ARE_EQUAL(SSPBufferSize) &&
69 ARE_EQUAL(EnableFastISel) &&
70 ARE_EQUAL(PositionIndependentExecutable) &&
71 ARE_EQUAL(EnableSegmentedStacks) &&
72 ARE_EQUAL(UseInitArray) &&
73 ARE_EQUAL(TrapFuncName) &&
74 ARE_EQUAL(FloatABIType) &&
75 ARE_EQUAL(AllowFPOpFusion);