AArch64Subtarget.cpp revision 5a364c5561ec04e33a6f5d52c14f1bac6f247ea0 
1//===-- AArch64Subtarget.cpp - AArch64 Subtarget Information --------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the AArch64 specific subclass of TargetSubtargetInfo.
11//
12//===----------------------------------------------------------------------===//
13
14#include "AArch64Subtarget.h"
15#include "AArch64RegisterInfo.h"
16#include "MCTargetDesc/AArch64MCTargetDesc.h"
17#include "llvm/IR/GlobalValue.h"
18#include "llvm/Target/TargetSubtargetInfo.h"
19#include "llvm/Support/CommandLine.h"
20#include "llvm/ADT/SmallVector.h"
21
22#define GET_SUBTARGETINFO_TARGET_DESC
23#define GET_SUBTARGETINFO_CTOR
24#include "AArch64GenSubtargetInfo.inc"
25
26using namespace llvm;
27
28// pin vtable to this file
29void AArch64Subtarget::anchor() {}
30
31AArch64Subtarget::AArch64Subtarget(StringRef TT, StringRef CPU, StringRef FS)
32    : AArch64GenSubtargetInfo(TT, CPU, FS), HasFPARMv8(false), HasNEON(false),
33      HasCrypto(false), TargetTriple(TT), CPUString(CPU) {
34
35  initializeSubtargetFeatures(CPU, FS);
36}
37
38void AArch64Subtarget::initializeSubtargetFeatures(StringRef CPU,
39                                                   StringRef FS) {
40  if (CPU.empty())
41    CPUString = "generic";
42
43  std::string FullFS = FS;
44  if (CPUString == "generic") {
45    // Enable FP by default.
46    if (FullFS.empty())
47      FullFS = "+fp-armv8";
48    else
49      FullFS = "+fp-armv8," + FullFS;
50  }
51
52  ParseSubtargetFeatures(CPU, FullFS);
53}
54
55bool AArch64Subtarget::GVIsIndirectSymbol(const GlobalValue *GV,
56                                          Reloc::Model RelocM) const {
57  if (RelocM == Reloc::Static)
58    return false;
59
60  return !GV->hasLocalLinkage() && !GV->hasHiddenVisibility();
61}
62