1 | /* Print RTL for GNU C Compiler. |
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2 | Copyright (C) 1987, 1988, 1992 Free Software Foundation, Inc. |
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3 | |
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4 | This file is part of GNU CC. |
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5 | |
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6 | GNU CC is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with GNU CC; see the file COPYING. If not, write to |
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18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | |
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22 | #include "config.h" |
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23 | #include <ctype.h> |
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24 | #include <stdio.h> |
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25 | #include "rtl.h" |
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26 | |
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27 | |
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28 | /* How to print out a register name. |
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29 | We don't use PRINT_REG because some definitions of PRINT_REG |
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30 | don't work here. */ |
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31 | #ifndef DEBUG_PRINT_REG |
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32 | #define DEBUG_PRINT_REG(RTX, CODE, FILE) \ |
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33 | fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)]) |
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34 | #endif |
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35 | |
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36 | /* Array containing all of the register names */ |
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37 | |
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38 | #ifdef DEBUG_REGISTER_NAMES |
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39 | static char *reg_names[] = DEBUG_REGISTER_NAMES; |
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40 | #else |
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41 | static char *reg_names[] = REGISTER_NAMES; |
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42 | #endif |
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43 | |
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44 | static FILE *outfile; |
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45 | |
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46 | char spaces[] = " "; |
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47 | |
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48 | static int sawclose = 0; |
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49 | |
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50 | /* Names for patterns. Non-zero only when linked with insn-output.c. */ |
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51 | |
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52 | extern char **insn_name_ptr; |
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53 | |
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54 | /* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */ |
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55 | |
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56 | static void |
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57 | print_rtx (in_rtx) |
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58 | register rtx in_rtx; |
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59 | { |
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60 | static int indent; |
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61 | register int i, j; |
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62 | register char *format_ptr; |
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63 | register int is_insn; |
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64 | |
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65 | if (sawclose) |
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66 | { |
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67 | fprintf (outfile, "\n%s", |
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68 | (spaces + (sizeof spaces - 1 - indent * 2))); |
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69 | sawclose = 0; |
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70 | } |
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71 | |
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72 | if (in_rtx == 0) |
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73 | { |
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74 | fprintf (outfile, "(nil)"); |
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75 | sawclose = 1; |
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76 | return; |
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77 | } |
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78 | |
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79 | /* print name of expression code */ |
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80 | fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx))); |
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81 | |
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82 | if (in_rtx->in_struct) |
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83 | fprintf (outfile, "/s"); |
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84 | |
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85 | if (in_rtx->volatil) |
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86 | fprintf (outfile, "/v"); |
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87 | |
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88 | if (in_rtx->unchanging) |
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89 | fprintf (outfile, "/u"); |
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90 | |
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91 | if (in_rtx->integrated) |
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92 | fprintf (outfile, "/i"); |
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93 | |
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94 | if (GET_MODE (in_rtx) != VOIDmode) |
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95 | { |
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96 | /* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */ |
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97 | if (GET_CODE (in_rtx) == EXPR_LIST || GET_CODE (in_rtx) == INSN_LIST) |
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98 | fprintf (outfile, ":%s", GET_REG_NOTE_NAME (GET_MODE (in_rtx))); |
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99 | else |
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100 | fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx))); |
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101 | } |
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102 | |
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103 | is_insn = (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i'); |
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104 | format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)); |
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105 | |
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106 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++) |
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107 | switch (*format_ptr++) |
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108 | { |
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109 | case 'S': |
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110 | case 's': |
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111 | if (XSTR (in_rtx, i) == 0) |
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112 | fprintf (outfile, " \"\""); |
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113 | else |
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114 | fprintf (outfile, " (\"%s\")", XSTR (in_rtx, i)); |
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115 | sawclose = 1; |
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116 | break; |
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117 | |
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118 | /* 0 indicates a field for internal use that should not be printed. */ |
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119 | case '0': |
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120 | break; |
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121 | |
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122 | case 'e': |
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123 | indent += 2; |
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124 | if (!sawclose) |
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125 | fprintf (outfile, " "); |
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126 | print_rtx (XEXP (in_rtx, i)); |
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127 | indent -= 2; |
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128 | break; |
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129 | |
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130 | case 'E': |
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131 | case 'V': |
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132 | indent += 2; |
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133 | if (sawclose) |
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134 | { |
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135 | fprintf (outfile, "\n%s", |
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136 | (spaces + (sizeof spaces - 1 - indent * 2))); |
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137 | sawclose = 0; |
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138 | } |
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139 | fprintf (outfile, "[ "); |
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140 | if (NULL != XVEC (in_rtx, i)) |
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141 | { |
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142 | indent += 2; |
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143 | if (XVECLEN (in_rtx, i)) |
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144 | sawclose = 1; |
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145 | |
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146 | for (j = 0; j < XVECLEN (in_rtx, i); j++) |
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147 | print_rtx (XVECEXP (in_rtx, i, j)); |
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148 | |
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149 | indent -= 2; |
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150 | } |
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151 | if (sawclose) |
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152 | fprintf (outfile, "\n%s", |
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153 | (spaces + (sizeof spaces - 1 - indent * 2))); |
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154 | |
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155 | fprintf (outfile, "] "); |
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156 | sawclose = 1; |
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157 | indent -= 2; |
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158 | break; |
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159 | |
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160 | case 'w': |
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161 | fprintf (outfile, |
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162 | #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT |
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163 | " %d", |
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164 | #else |
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165 | " %ld", |
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166 | #endif |
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167 | XWINT (in_rtx, i)); |
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168 | break; |
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169 | |
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170 | case 'i': |
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171 | { |
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172 | register int value = XINT (in_rtx, i); |
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173 | |
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174 | if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER) |
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175 | { |
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176 | fputc (' ', outfile); |
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177 | DEBUG_PRINT_REG (in_rtx, 0, outfile); |
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178 | } |
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179 | else |
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180 | fprintf (outfile, " %d", value); |
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181 | } |
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182 | if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i) |
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183 | && insn_name_ptr |
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184 | && XINT (in_rtx, i) >= 0) |
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185 | fprintf (outfile, " {%s}", insn_name_ptr[XINT (in_rtx, i)]); |
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186 | sawclose = 0; |
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187 | break; |
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188 | |
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189 | /* Print NOTE_INSN names rather than integer codes. */ |
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190 | |
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191 | case 'n': |
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192 | if (XINT (in_rtx, i) <= 0) |
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193 | fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i))); |
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194 | else |
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195 | fprintf (outfile, " %d", XINT (in_rtx, i)); |
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196 | sawclose = 0; |
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197 | break; |
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198 | |
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199 | case 'u': |
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200 | if (XEXP (in_rtx, i) != NULL) |
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201 | fprintf (outfile, " %d", INSN_UID (XEXP (in_rtx, i))); |
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202 | else |
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203 | fprintf (outfile, " 0"); |
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204 | sawclose = 0; |
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205 | break; |
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206 | |
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207 | case '*': |
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208 | fprintf (outfile, " Unknown"); |
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209 | sawclose = 0; |
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210 | break; |
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211 | |
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212 | default: |
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213 | fprintf (stderr, |
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214 | "switch format wrong in rtl.print_rtx(). format was: %c.\n", |
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215 | format_ptr[-1]); |
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216 | abort (); |
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217 | } |
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218 | |
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219 | fprintf (outfile, ")"); |
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220 | sawclose = 1; |
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221 | } |
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222 | |
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223 | /* Call this function from the debugger to see what X looks like. */ |
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224 | |
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225 | void |
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226 | debug_rtx (x) |
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227 | rtx x; |
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228 | { |
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229 | outfile = stderr; |
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230 | print_rtx (x); |
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231 | fprintf (stderr, "\n"); |
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232 | } |
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233 | |
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234 | /* Count of rtx's to print with debug_rtx_list. |
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235 | This global exists because gdb user defined commands have no arguments. */ |
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236 | |
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237 | int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */ |
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238 | |
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239 | /* Call this function to print list from X on. |
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240 | |
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241 | N is a count of the rtx's to print. Positive values print from the specified |
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242 | rtx on. Negative values print a window around the rtx. |
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243 | EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */ |
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244 | |
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245 | void |
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246 | debug_rtx_list (x, n) |
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247 | rtx x; |
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248 | int n; |
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249 | { |
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250 | int i,count; |
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251 | rtx insn; |
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252 | |
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253 | count = n == 0 ? 1 : n < 0 ? -n : n; |
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254 | |
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255 | /* If we are printing a window, back up to the start. */ |
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256 | |
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257 | if (n < 0) |
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258 | for (i = count / 2; i > 0; i--) |
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259 | { |
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260 | if (PREV_INSN (x) == 0) |
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261 | break; |
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262 | x = PREV_INSN (x); |
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263 | } |
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264 | |
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265 | for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn)) |
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266 | debug_rtx (insn); |
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267 | } |
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268 | |
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269 | /* Call this function to search an rtx list to find one with insn uid UID, |
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270 | and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT. |
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271 | The found insn is returned to enable further debugging analysis. */ |
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272 | |
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273 | rtx |
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274 | debug_rtx_find(x, uid) |
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275 | rtx x; |
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276 | int uid; |
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277 | { |
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278 | while (x != 0 && INSN_UID (x) != uid) |
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279 | x = NEXT_INSN (x); |
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280 | if (x != 0) |
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281 | { |
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282 | debug_rtx_list (x, debug_rtx_count); |
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283 | return x; |
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284 | } |
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285 | else |
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286 | { |
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287 | fprintf (stderr, "insn uid %d not found\n", uid); |
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288 | return 0; |
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289 | } |
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290 | } |
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291 | |
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292 | /* External entry point for printing a chain of insns |
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293 | starting with RTX_FIRST onto file OUTF. |
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294 | A blank line separates insns. |
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295 | |
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296 | If RTX_FIRST is not an insn, then it alone is printed, with no newline. */ |
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297 | |
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298 | void |
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299 | print_rtl (outf, rtx_first) |
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300 | FILE *outf; |
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301 | rtx rtx_first; |
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302 | { |
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303 | register rtx tmp_rtx; |
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304 | |
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305 | outfile = outf; |
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306 | sawclose = 0; |
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307 | |
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308 | if (rtx_first == 0) |
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309 | fprintf (outf, "(nil)\n"); |
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310 | else |
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311 | switch (GET_CODE (rtx_first)) |
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312 | { |
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313 | case INSN: |
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314 | case JUMP_INSN: |
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315 | case CALL_INSN: |
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316 | case NOTE: |
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317 | case CODE_LABEL: |
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318 | case BARRIER: |
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319 | for (tmp_rtx = rtx_first; NULL != tmp_rtx; tmp_rtx = NEXT_INSN (tmp_rtx)) |
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320 | { |
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321 | print_rtx (tmp_rtx); |
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322 | fprintf (outfile, "\n"); |
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323 | } |
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324 | break; |
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325 | |
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326 | default: |
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327 | print_rtx (rtx_first); |
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328 | } |
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329 | } |
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