SparcSubtarget.cpp revision 4ee451de366474b9c228b4e5fa573795a715216d 
1//===- SparcSubtarget.cpp - SPARC 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 SPARC specific subclass of TargetSubtarget.
11//
12//===----------------------------------------------------------------------===//
13
14#include "SparcSubtarget.h"
15#include "SparcGenSubtarget.inc"
16using namespace llvm;
17
18// FIXME: temporary.
19#include "llvm/Support/CommandLine.h"
20namespace {
21  cl::opt<bool> EnableV9("enable-sparc-v9-insts", cl::Hidden,
22                          cl::desc("Enable V9 instructions in the V8 target"));
23}
24
25SparcSubtarget::SparcSubtarget(const Module &M, const std::string &FS) {
26  // Set the default features.
27  IsV9 = false;
28  V8DeprecatedInsts = false;
29  IsVIS = false;
30
31  // Determine default and user specified characteristics
32  std::string CPU = "generic";
33
34  // FIXME: autodetect host here!
35  CPU = "v9";   // What is a good way to detect V9?
36
37  // Parse features string.
38  ParseSubtargetFeatures(FS, CPU);
39
40  // Unless explicitly enabled, disable the V9 instructions.
41  if (!EnableV9)
42    IsV9 = false;
43}
44