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e1a79915 | 1 | /* Print RTL for GNU C Compiler. |
5bf665df | 2 | Copyright (C) 1987-1991 Free Software Foundation, Inc. |
e1a79915 RS |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include <ctype.h> | |
23 | #include <stdio.h> | |
24 | #include "rtl.h" | |
25 | ||
26 | ||
cf99a734 RS |
27 | /* How to print out a register name. |
28 | We don't use PRINT_REG because some definitions of PRINT_REG | |
29 | don't work here. */ | |
30 | #ifndef DEBUG_PRINT_REG | |
31 | #define DEBUG_PRINT_REG(RTX, CODE, FILE) \ | |
32 | fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)]) | |
33 | #endif | |
34 | ||
35 | /* Array containing all of the register names */ | |
36 | ||
37 | #ifdef DEBUG_REGISTER_NAMES | |
38 | static char *reg_names[] = DEBUG_REGISTER_NAMES; | |
39 | #else | |
40 | static char *reg_names[] = REGISTER_NAMES; | |
41 | #endif | |
42 | ||
e1a79915 RS |
43 | static FILE *outfile; |
44 | ||
45 | char spaces[] = " "; | |
46 | ||
47 | static int sawclose = 0; | |
48 | ||
49 | /* Names for patterns. Non-zero only when linked with insn-output.c. */ | |
50 | ||
51 | extern char **insn_name_ptr; | |
52 | ||
53 | /* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */ | |
54 | ||
55 | static void | |
56 | print_rtx (in_rtx) | |
57 | register rtx in_rtx; | |
58 | { | |
59 | static int indent; | |
60 | register int i, j; | |
61 | register char *format_ptr; | |
62 | register int is_insn; | |
63 | ||
64 | if (sawclose) | |
65 | { | |
66 | fprintf (outfile, "\n%s", | |
bcd4420d | 67 | (spaces + (sizeof spaces - 1 - indent * 2))); |
e1a79915 RS |
68 | sawclose = 0; |
69 | } | |
70 | ||
71 | if (in_rtx == 0) | |
72 | { | |
73 | fprintf (outfile, "(nil)"); | |
74 | sawclose = 1; | |
75 | return; | |
76 | } | |
77 | ||
78 | /* print name of expression code */ | |
79 | fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx))); | |
80 | ||
81 | if (in_rtx->in_struct) | |
82 | fprintf (outfile, "/s"); | |
83 | ||
84 | if (in_rtx->volatil) | |
85 | fprintf (outfile, "/v"); | |
86 | ||
87 | if (in_rtx->unchanging) | |
88 | fprintf (outfile, "/u"); | |
89 | ||
90 | if (in_rtx->integrated) | |
91 | fprintf (outfile, "/i"); | |
92 | ||
93 | if (GET_MODE (in_rtx) != VOIDmode) | |
94 | { | |
95 | /* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */ | |
96 | if (GET_CODE (in_rtx) == EXPR_LIST || GET_CODE (in_rtx) == INSN_LIST) | |
97 | fprintf (outfile, ":%s", GET_REG_NOTE_NAME (GET_MODE (in_rtx))); | |
98 | else | |
99 | fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx))); | |
100 | } | |
101 | ||
102 | is_insn = (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i'); | |
103 | format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)); | |
104 | ||
105 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++) | |
106 | switch (*format_ptr++) | |
107 | { | |
108 | case 'S': | |
109 | case 's': | |
110 | if (XSTR (in_rtx, i) == 0) | |
111 | fprintf (outfile, " \"\""); | |
112 | else | |
113 | fprintf (outfile, " (\"%s\")", XSTR (in_rtx, i)); | |
114 | sawclose = 1; | |
115 | break; | |
116 | ||
117 | /* 0 indicates a field for internal use that should not be printed. */ | |
118 | case '0': | |
119 | break; | |
120 | ||
121 | case 'e': | |
122 | indent += 2; | |
123 | if (!sawclose) | |
124 | fprintf (outfile, " "); | |
125 | print_rtx (XEXP (in_rtx, i)); | |
126 | indent -= 2; | |
127 | break; | |
128 | ||
129 | case 'E': | |
130 | case 'V': | |
131 | indent += 2; | |
132 | if (sawclose) | |
133 | { | |
134 | fprintf (outfile, "\n%s", | |
bcd4420d | 135 | (spaces + (sizeof spaces - 1 - indent * 2))); |
e1a79915 RS |
136 | sawclose = 0; |
137 | } | |
138 | fprintf (outfile, "[ "); | |
139 | if (NULL != XVEC (in_rtx, i)) | |
140 | { | |
141 | indent += 2; | |
142 | if (XVECLEN (in_rtx, i)) | |
143 | sawclose = 1; | |
144 | ||
145 | for (j = 0; j < XVECLEN (in_rtx, i); j++) | |
146 | print_rtx (XVECEXP (in_rtx, i, j)); | |
147 | ||
148 | indent -= 2; | |
149 | } | |
150 | if (sawclose) | |
151 | fprintf (outfile, "\n%s", | |
bcd4420d | 152 | (spaces + (sizeof spaces - 1 - indent * 2))); |
e1a79915 RS |
153 | |
154 | fprintf (outfile, "] "); | |
155 | sawclose = 1; | |
156 | indent -= 2; | |
157 | break; | |
158 | ||
5bf665df RK |
159 | case 'w': |
160 | fprintf (outfile, | |
161 | #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT | |
162 | " %d", | |
163 | #else | |
164 | " %ld", | |
165 | #endif | |
166 | XWINT (in_rtx, i)); | |
167 | break; | |
168 | ||
e1a79915 | 169 | case 'i': |
cf99a734 RS |
170 | { |
171 | register int value = XINT (in_rtx, i); | |
172 | ||
173 | if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER) | |
174 | { | |
175 | fputc (' ', outfile); | |
176 | DEBUG_PRINT_REG (in_rtx, 0, outfile); | |
177 | } | |
178 | else | |
179 | fprintf (outfile, " %d", value); | |
180 | } | |
e1a79915 RS |
181 | if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i) |
182 | && insn_name_ptr | |
183 | && XINT (in_rtx, i) >= 0) | |
cf99a734 | 184 | fprintf (outfile, " {%s}", insn_name_ptr[XINT (in_rtx, i)]); |
e1a79915 RS |
185 | sawclose = 0; |
186 | break; | |
187 | ||
188 | /* Print NOTE_INSN names rather than integer codes. */ | |
189 | ||
190 | case 'n': | |
191 | if (XINT (in_rtx, i) <= 0) | |
192 | fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i))); | |
193 | else | |
194 | fprintf (outfile, " %d", XINT (in_rtx, i)); | |
195 | sawclose = 0; | |
196 | break; | |
197 | ||
198 | case 'u': | |
199 | if (XEXP (in_rtx, i) != NULL) | |
d64be5ec | 200 | fprintf (outfile, " %d", INSN_UID (XEXP (in_rtx, i))); |
e1a79915 | 201 | else |
d64be5ec CH |
202 | fprintf (outfile, " 0"); |
203 | sawclose = 0; | |
204 | break; | |
205 | ||
206 | case '*': | |
207 | fprintf (outfile, " Unknown"); | |
e1a79915 RS |
208 | sawclose = 0; |
209 | break; | |
210 | ||
211 | default: | |
212 | fprintf (stderr, | |
213 | "switch format wrong in rtl.print_rtx(). format was: %c.\n", | |
214 | format_ptr[-1]); | |
215 | abort (); | |
216 | } | |
217 | ||
218 | fprintf (outfile, ")"); | |
219 | sawclose = 1; | |
220 | } | |
221 | ||
222 | /* Call this function from the debugger to see what X looks like. */ | |
223 | ||
224 | void | |
225 | debug_rtx (x) | |
226 | rtx x; | |
227 | { | |
228 | outfile = stderr; | |
229 | print_rtx (x); | |
230 | fprintf (stderr, "\n"); | |
231 | } | |
232 | ||
716f003f DE |
233 | /* Count of rtx's to print with debug_rtx_list. |
234 | This global exists because gdb user defined commands have no arguments. */ | |
235 | ||
236 | int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */ | |
237 | ||
238 | /* Call this function to print list from X on. | |
239 | ||
240 | N is a count of the rtx's to print. Positive values print from the specified | |
241 | rtx on. Negative values print a window around the rtx. | |
242 | EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */ | |
243 | ||
244 | void | |
245 | debug_rtx_list (x, n) | |
246 | rtx x; | |
247 | int n; | |
248 | { | |
249 | int i,count; | |
250 | rtx insn; | |
251 | ||
252 | count = n == 0 ? 1 : n < 0 ? -n : n; | |
253 | ||
254 | /* If we are printing a window, back up to the start. */ | |
255 | ||
256 | if (n < 0) | |
257 | for (i = count / 2; i > 0; i--) | |
258 | { | |
259 | if (PREV_INSN (x) == 0) | |
260 | break; | |
261 | x = PREV_INSN (x); | |
262 | } | |
263 | ||
264 | for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn)) | |
265 | debug_rtx (insn); | |
266 | } | |
267 | ||
268 | /* Call this function to search an rtx list to find one with insn uid UID, | |
269 | and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT. | |
270 | The found insn is returned to enable further debugging analysis. */ | |
271 | ||
272 | rtx | |
273 | debug_rtx_find(x, uid) | |
274 | rtx x; | |
275 | int uid; | |
276 | { | |
277 | while (x != 0 && INSN_UID (x) != uid) | |
278 | x = NEXT_INSN (x); | |
279 | if (x != 0) | |
280 | { | |
281 | debug_rtx_list (x, debug_rtx_count); | |
282 | return x; | |
283 | } | |
284 | else | |
285 | { | |
286 | fprintf (stderr, "insn uid %d not found\n", uid); | |
287 | return 0; | |
288 | } | |
289 | } | |
290 | ||
e1a79915 RS |
291 | /* External entry point for printing a chain of insns |
292 | starting with RTX_FIRST onto file OUTF. | |
293 | A blank line separates insns. | |
294 | ||
295 | If RTX_FIRST is not an insn, then it alone is printed, with no newline. */ | |
296 | ||
297 | void | |
298 | print_rtl (outf, rtx_first) | |
299 | FILE *outf; | |
300 | rtx rtx_first; | |
301 | { | |
302 | register rtx tmp_rtx; | |
303 | ||
304 | outfile = outf; | |
305 | sawclose = 0; | |
306 | ||
307 | if (rtx_first == 0) | |
308 | fprintf (outf, "(nil)\n"); | |
309 | else | |
310 | switch (GET_CODE (rtx_first)) | |
311 | { | |
312 | case INSN: | |
313 | case JUMP_INSN: | |
314 | case CALL_INSN: | |
315 | case NOTE: | |
316 | case CODE_LABEL: | |
317 | case BARRIER: | |
318 | for (tmp_rtx = rtx_first; NULL != tmp_rtx; tmp_rtx = NEXT_INSN (tmp_rtx)) | |
319 | { | |
320 | print_rtx (tmp_rtx); | |
321 | fprintf (outfile, "\n"); | |
322 | } | |
323 | break; | |
324 | ||
325 | default: | |
326 | print_rtx (rtx_first); | |
327 | } | |
328 | } |