1 //===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- C++ -*-===//
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 ARM specific subclass of TargetSubtarget.
12 //===----------------------------------------------------------------------===//
14 #include "ARMSubtarget.h"
15 #include "ARMGenSubtarget.inc"
16 #include "llvm/Module.h"
19 ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
25 , UseThumbBacktraces(false)
28 , CPUString("generic")
29 , TargetType(isELF) // Default to ELF unless otherwise specified.
30 , TargetABI(ARM_ABI_APCS) {
31 // Determine default and user specified characteristics
33 // Parse features string.
34 CPUString = ParseSubtargetFeatures(FS, CPUString);
36 // Set the boolean corresponding to the current target triple, or the default
37 // if one cannot be determined, to true.
38 const std::string& TT = M.getTargetTriple();
39 unsigned Len = TT.length();
42 if (Len >= 5 && TT.substr(0, 4) == "armv")
44 else if (Len >= 6 && TT.substr(0, 6) == "thumb") {
46 if (Len >= 7 && TT[5] == 'v')
50 unsigned SubVer = TT[Idx];
51 if (SubVer > '4' && SubVer <= '9') {
54 else if (SubVer == '6')
56 else if (SubVer == '5') {
58 if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
59 ARMArchVersion = V5TE;
65 if (TT.find("-darwin") != std::string::npos)
67 TargetType = isDarwin;
68 } else if (TT.empty()) {
69 #if defined(__APPLE__)
70 TargetType = isDarwin;
74 if (TT.find("eabi") != std::string::npos)
75 TargetABI = ARM_ABI_AAPCS;
80 if (isTargetDarwin()) {
81 UseThumbBacktraces = true;