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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
// Derived from Inferno utils/6c/gc.h
// http://code.google.com/p/inferno-os/source/browse/utils/6c/gc.h
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#define Z N
#define Adr Addr
#define D_HI D_NONE
#define D_LO D_NONE
#define BLOAD(r) band(bnot(r->refbehind), r->refahead)
#define BSTORE(r) band(bnot(r->calbehind), r->calahead)
#define LOAD(r) (~r->refbehind.b[z] & r->refahead.b[z])
#define STORE(r) (~r->calbehind.b[z] & r->calahead.b[z])
#define CLOAD 5
#define CREF 5
#define CINF 1000
#define LOOP 3
typedef struct Reg Reg;
typedef struct Rgn Rgn;
struct Reg
{
Bits set;
Bits use1;
Bits use2;
Bits refbehind;
Bits refahead;
Bits calbehind;
Bits calahead;
Bits regdiff;
Bits act;
int32 regu; // register used bitmap
int32 rpo; // reverse post ordering
int32 active;
uint16 loop; // x5 for every loop
uchar refset; // diagnostic generated
Reg* p1;
Reg* p2;
Reg* p2link;
Reg* s1;
Reg* s2;
Reg* link;
Prog* prog;
};
#define R ((Reg*)0)
#define NRGN 600
struct Rgn
{
Reg* enter;
short cost;
short varno;
short regno;
};
EXTERN int32 exregoffset; // not set
EXTERN int32 exfregoffset; // not set
EXTERN Reg* firstr;
EXTERN Reg* lastr;
EXTERN Reg zreg;
EXTERN Reg* freer;
EXTERN Reg** rpo2r;
EXTERN Rgn region[NRGN];
EXTERN Rgn* rgp;
EXTERN int nregion;
EXTERN int nvar;
EXTERN int32 regbits;
EXTERN int32 exregbits;
EXTERN Bits externs;
EXTERN Bits params;
EXTERN Bits consts;
EXTERN Bits addrs;
EXTERN Bits ovar;
EXTERN int change;
EXTERN int32 maxnr;
EXTERN int32* idom;
EXTERN struct
{
int32 ncvtreg;
int32 nspill;
int32 nreload;
int32 ndelmov;
int32 nvar;
int32 naddr;
} ostats;
/*
* reg.c
*/
Reg* rega(void);
int rcmp(const void*, const void*);
void regopt(Prog*);
void addmove(Reg*, int, int, int);
Bits mkvar(Reg*, Adr*);
void prop(Reg*, Bits, Bits);
void loopit(Reg*, int32);
void synch(Reg*, Bits);
uint32 allreg(uint32, Rgn*);
void paint1(Reg*, int);
uint32 paint2(Reg*, int);
void paint3(Reg*, int, int32, int);
void addreg(Adr*, int);
void dumpone(Reg*);
void dumpit(char*, Reg*);
int noreturn(Prog *p);
/*
* peep.c
*/
void peep(void);
void excise(Reg*);
Reg* uniqp(Reg*);
Reg* uniqs(Reg*);
int regtyp(Adr*);
int anyvar(Adr*);
int subprop(Reg*);
int copyprop(Reg*);
int copy1(Adr*, Adr*, Reg*, int);
int copyu(Prog*, Adr*, Adr*);
int copyas(Adr*, Adr*);
int copyau(Adr*, Adr*);
int copysub(Adr*, Adr*, Adr*, int);
int copysub1(Prog*, Adr*, Adr*, int);
int32 RtoB(int);
int32 FtoB(int);
int BtoR(int32);
int BtoF(int32);
#pragma varargck type "D" Adr*
|