CodeGenTarget.cpp revision 803a5f6ecb1823280f80e3c4459aa58627d0484c 
1//===- CodeGenTarget.cpp - CodeGen Target Class Wrapper ---------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This class wrap target description classes used by the various code
11// generation TableGen backends.  This makes it easier to access the data and
12// provides a single place that needs to check it for validity.  All of these
13// classes throw exceptions on error conditions.
14//
15//===----------------------------------------------------------------------===//
16
17#include "CodeGenTarget.h"
18#include "Record.h"
19using namespace llvm;
20
21/// getValueType - Return the MCV::ValueType that the specified TableGen record
22/// corresponds to.
23MVT::ValueType llvm::getValueType(Record *Rec) {
24  return (MVT::ValueType)Rec->getValueAsInt("Value");
25}
26
27std::string llvm::getName(MVT::ValueType T) {
28  switch (T) {
29  case MVT::Other: return "UNKNOWN";
30  case MVT::i1:    return "i1";
31  case MVT::i8:    return "i8";
32  case MVT::i16:   return "i16";
33  case MVT::i32:   return "i32";
34  case MVT::i64:   return "i64";
35  case MVT::i128:  return "i128";
36  case MVT::f32:   return "f32";
37  case MVT::f64:   return "f64";
38  case MVT::f80:   return "f80";
39  case MVT::f128:  return "f128";
40  case MVT::isVoid:return "void";
41  default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
42  }
43}
44
45std::string llvm::getEnumName(MVT::ValueType T) {
46  switch (T) {
47  case MVT::Other: return "Other";
48  case MVT::i1:    return "i1";
49  case MVT::i8:    return "i8";
50  case MVT::i16:   return "i16";
51  case MVT::i32:   return "i32";
52  case MVT::i64:   return "i64";
53  case MVT::i128:  return "i128";
54  case MVT::f32:   return "f32";
55  case MVT::f64:   return "f64";
56  case MVT::f80:   return "f80";
57  case MVT::f128:  return "f128";
58  case MVT::isVoid:return "isVoid";
59  default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
60  }
61}
62
63
64std::ostream &llvm::operator<<(std::ostream &OS, MVT::ValueType T) {
65  return OS << getName(T);
66}
67
68
69/// getTarget - Return the current instance of the Target class.
70///
71CodeGenTarget::CodeGenTarget() : PointerType(MVT::Other) {
72  std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
73  if (Targets.size() == 0)
74    throw std::string("ERROR: No 'Target' subclasses defined!");
75  if (Targets.size() != 1)
76    throw std::string("ERROR: Multiple subclasses of Target defined!");
77  TargetRec = Targets[0];
78
79  // Read in all of the CalleeSavedRegisters...
80  ListInit *LI = TargetRec->getValueAsListInit("CalleeSavedRegisters");
81  for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
82    if (DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(i)))
83      CalleeSavedRegisters.push_back(DI->getDef());
84    else
85      throw "Target: " + TargetRec->getName() +
86            " expected register definition in CalleeSavedRegisters list!";
87
88  PointerType = getValueType(TargetRec->getValueAsDef("PointerType"));
89}
90
91
92const std::string &CodeGenTarget::getName() const {
93  return TargetRec->getName();
94}
95
96Record *CodeGenTarget::getInstructionSet() const {
97  return TargetRec->getValueAsDef("InstructionSet");
98}
99
100