SelectionDAG.cpp revision 78ec311bd5fcdf44ed64841a0f5df1124b3a9b17 
1//===-- SelectionDAG.cpp - Implement the SelectionDAG* classes ------------===//
2//
3// This file implements the SelectionDAG* classes, which are used to perform
4// DAG-based instruction selection in a target-specific manner.
5//
6//===----------------------------------------------------------------------===//
7
8#include "llvm/CodeGen/SelectionDAG.h"
9#include "llvm/Type.h"
10
11SelectionDAG::~SelectionDAG() {
12  for (unsigned i = 0, e = AllNodes.size(); i != e; ++i)
13    delete AllNodes[i];
14}
15
16
17/// dump - Print out the current Selection DAG...
18void SelectionDAG::dump() const {
19  Root->dump();  // Print from the root...
20}
21
22/// getValueType - Return the ValueType for the specified LLVM type.  This
23/// method works on all scalar LLVM types.
24///
25MVT::ValueType SelectionDAG::getValueType(const Type *Ty) const {
26  switch (Ty->getPrimitiveID()) {
27  case Type::VoidTyID: assert(0 && "Void type object in getValueType!");
28  default: assert(0 && "Unknown type in DAGBuilder!\n");
29  case Type::BoolTyID:    return MVT::i1;
30  case Type::SByteTyID:
31  case Type::UByteTyID:   return MVT::i8;
32  case Type::ShortTyID:
33  case Type::UShortTyID:  return MVT::i16;
34  case Type::IntTyID:
35  case Type::UIntTyID:    return MVT::i32;
36  case Type::LongTyID:
37  case Type::ULongTyID:   return MVT::i64;
38  case Type::FloatTyID:   return MVT::f32;
39  case Type::DoubleTyID:  return MVT::f64;
40  case Type::PointerTyID: return PointerType;
41  }
42}
43
44void SelectionDAGNode::dump() const {
45  // Print out the DAG in post-order
46  std::map<const SelectionDAGNode*, unsigned> NodeIDs;
47  unsigned ID = 0;
48  printit(0, ID, NodeIDs);
49}
50
51void SelectionDAGNode::printit(unsigned Offset, unsigned &LastID,
52                               std::map<const SelectionDAGNode*,
53                                        unsigned> &NodeIDs) const {
54  if (!NodeIDs.count(this)) {
55    // Emit all of the uses first...
56    for (unsigned i = 0, e = Uses.size(); i != e; ++i)
57      Uses[i]->printit(Offset+1, LastID, NodeIDs);
58
59    NodeIDs[this] = LastID++;
60
61    std::cerr << std::string(Offset, ' ') << "#" << LastID-1 << " ";
62  } else {
63    // Node has already been emitted...
64    std::cerr << std::string(Offset, ' ') << "#" << NodeIDs[this] << " ";
65  }
66
67  switch (ValueType) {
68  case MVT::isVoid: std::cerr << "V:"; break;
69  case MVT::i1:   std::cerr << "i1:"; break;
70  case MVT::i8:   std::cerr << "i8:"; break;
71  case MVT::i16:  std::cerr << "i16:"; break;
72  case MVT::i32:  std::cerr << "i32:"; break;
73  case MVT::i64:  std::cerr << "i64:"; break;
74  case MVT::f32:  std::cerr << "f32:"; break;
75  case MVT::f64:  std::cerr << "f64:"; break;
76  default: assert(0 && "Invalid node ValueType!");
77  }
78  switch (NodeType) {
79  case ISD::ChainNode:      std::cerr << "ChainNode"; break;
80  case ISD::BlockChainNode: std::cerr << "BlockChainNode"; break;
81  case ISD::ProtoNode:      std::cerr << "ProtoNode"; break;
82  case ISD::Constant:       std::cerr << "Constant"; break;
83  case ISD::FrameIndex:     std::cerr << "FrameIndex"; break;
84  case ISD::Plus:           std::cerr << "Plus"; break;
85  case ISD::Minus:          std::cerr << "Minus"; break;
86  case ISD::Times:          std::cerr << "Times"; break;
87  case ISD::SDiv:           std::cerr << "SDiv"; break;
88  case ISD::UDiv:           std::cerr << "UDiv"; break;
89  case ISD::SRem:           std::cerr << "SRem"; break;
90  case ISD::URem:           std::cerr << "URem"; break;
91  case ISD::And:            std::cerr << "And"; break;
92  case ISD::Or:             std::cerr << "Or"; break;
93  case ISD::Xor:            std::cerr << "Xor"; break;
94  case ISD::Br:             std::cerr << "Br"; break;
95  case ISD::Switch:         std::cerr << "Switch"; break;
96  case ISD::Ret:            std::cerr << "Ret"; break;
97  case ISD::RetVoid:        std::cerr << "RetVoid"; break;
98  case ISD::Load:           std::cerr << "Load"; break;
99  case ISD::Store:          std::cerr << "Store"; break;
100  case ISD::PHI:            std::cerr << "PHI"; break;
101  case ISD::Call:           std::cerr << "Call"; break;
102  }
103
104  std::cerr << "\n";
105}
106