lib/Target/AArch64/AArch64Subtarget.cpp

   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/ADT/SmallVector.h"
  18 #include "llvm/IR/GlobalValue.h"
  19 #include "llvm/Support/CommandLine.h"
  20 #include "llvm/Target/TargetSubtargetInfo.h"
  21
  22 #define GET_SUBTARGETINFO_TARGET_DESC
  23 #define GET_SUBTARGETINFO_CTOR
  24 #include "AArch64GenSubtargetInfo.inc"
  25
  26 using namespace llvm;
  27
  28 // Pin the vtable to this file.
  29 void AArch64Subtarget::anchor() {}
  30
  31 AArch64Subtarget::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
  38 void 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
  55 bool 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 }