blob: 53df8bde7f57361c98778b451383a155628be375 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
//===-- llvm/CodeGen/MachineFunctionInfo.h ----------------------*- C++ -*-===//
//
// This class keeps track of information about the stack frame and about the
// per-function constant pool.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEFUNCTIONINFO_H
#define LLVM_CODEGEN_MACHINEFUNCTIONINFO_H
#include "Support/HashExtras.h"
#include "Support/hash_set"
class MachineFunction;
class Value;
class Constant;
class Type;
class MachineFunctionInfo {
hash_set<const Constant*> constantsForConstPool;
hash_map<const Value*, int> offsets;
unsigned staticStackSize;
unsigned automaticVarsSize;
unsigned regSpillsSize;
unsigned maxOptionalArgsSize;
unsigned maxOptionalNumArgs;
unsigned currentTmpValuesSize;
unsigned maxTmpValuesSize;
bool compiledAsLeaf;
bool spillsAreaFrozen;
bool automaticVarsAreaFrozen;
MachineFunction &MF;
public:
MachineFunctionInfo(MachineFunction &mf) : MF(mf) {
staticStackSize = automaticVarsSize = regSpillsSize = 0;
maxOptionalArgsSize = maxOptionalNumArgs = currentTmpValuesSize = 0;
maxTmpValuesSize = 0;
compiledAsLeaf = spillsAreaFrozen = automaticVarsAreaFrozen = false;
}
/// CalculateArgSize - Call this method to fill in the maxOptionalArgsSize &
/// staticStackSize fields...
///
void CalculateArgSize();
//
// Accessors for global information about generated code for a method.
//
bool isCompiledAsLeafMethod() const { return compiledAsLeaf; }
unsigned getStaticStackSize() const { return staticStackSize; }
unsigned getAutomaticVarsSize() const { return automaticVarsSize; }
unsigned getRegSpillsSize() const { return regSpillsSize; }
unsigned getMaxOptionalArgsSize() const { return maxOptionalArgsSize;}
unsigned getMaxOptionalNumArgs() const { return maxOptionalNumArgs;}
const hash_set<const Constant*> &getConstantPoolValues() const {
return constantsForConstPool;
}
//
// Modifiers used during code generation
//
void initializeFrameLayout ();
void addToConstantPool (const Constant* constVal) {
constantsForConstPool.insert(constVal);
}
void markAsLeafMethod() { compiledAsLeaf = true; }
int computeOffsetforLocalVar (const Value* local,
unsigned& getPaddedSize,
unsigned sizeToUse = 0);
int allocateLocalVar (const Value* local,
unsigned sizeToUse = 0);
int allocateSpilledValue (const Type* type);
int pushTempValue (unsigned size);
void popAllTempValues ();
void freezeSpillsArea () { spillsAreaFrozen = true; }
void freezeAutomaticVarsArea () { automaticVarsAreaFrozen=true; }
int getOffset (const Value* val) const;
private:
void incrementAutomaticVarsSize(int incr) {
automaticVarsSize+= incr;
staticStackSize += incr;
}
void incrementRegSpillsSize(int incr) {
regSpillsSize+= incr;
staticStackSize += incr;
}
void incrementTmpAreaSize(int incr) {
currentTmpValuesSize += incr;
if (maxTmpValuesSize < currentTmpValuesSize)
{
staticStackSize += currentTmpValuesSize - maxTmpValuesSize;
maxTmpValuesSize = currentTmpValuesSize;
}
}
void resetTmpAreaSize() {
currentTmpValuesSize = 0;
}
int allocateOptionalArg(const Type* type);
};
#endif
|
