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 
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 }
62