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annotate lwasm/pass5.c @ 417:d7b7004b0883

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Update gcc6809 patch to fix an ICE. Add new gcc6809 patch with a fix to an internal compiler error reported by Tormod Volden. It seems whoever created the offending instruction patterns didn't fully understand the instruction contraints system and likely got away with it due to characteristics of the instruction generator in previous versions of gcc. Alas, it causes problems now so unless someone has a brilliant idea how to make it work, addhi_mem_1 and addhi_mem_minus1 have to go. Fortunately, the compiler is smart enough to use an alternate strategy all on its own.
author William Astle <lost@l-w.ca>
date Sun, 27 Mar 2016 21:46:18 -0600
parents 8764142b3192
children 58cafa61ab40
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 pass5.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdio.h>
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23 #include <string.h>
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24
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25 #include <lw_alloc.h>
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26 #include <lw_string.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30
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31 /*
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32 AssignAddresses Pass
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33
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34 Force resolution of all line addresses
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35
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36 */
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37
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38 static int exprok_aux(lw_expr_t e, void *priv)
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39 {
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40 asmstate_t *as = priv;
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41
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42 if (lw_expr_istype(e, lw_expr_type_int))
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43 return 0;
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44 if (lw_expr_istype(e, lw_expr_type_oper))
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45 return 0;
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46 if (lw_expr_istype(e, lw_expr_type_special) && as -> output_format == OUTPUT_OBJ)
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47 {
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48 int t;
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49 t = lw_expr_specint(e);
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50 if (t == lwasm_expr_secbase)
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51 return 0;
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52 }
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53
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54 return 1;
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55 }
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56
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57 static int exprok(asmstate_t *as, lw_expr_t e)
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58 {
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59 if (lw_expr_testterms(e, exprok_aux, as))
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60 return 0;
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61 return 1;
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62 }
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63
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64 void do_pass5(asmstate_t *as)
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65 {
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66 // int rc;
0
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67 int cnt;
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68 int ocnt;
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69 line_t *cl, *sl;
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70 // struct line_expr_s *le;
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71
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72 // first, count the number of non-constant addresses; do
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73 // a reduction first on each one
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74 for (cnt = 0, cl = as -> line_head; cl; cl = cl -> next)
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75 {
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76 as -> cl = cl;
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77 lwasm_reduce_expr(as, cl -> addr);
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78 if (!exprok(as, cl -> addr))
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79 cnt++;
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80 lwasm_reduce_expr(as, cl -> daddr);
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81 if (!exprok(as, cl -> daddr))
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82 cnt++;
0
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83 }
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84
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85 sl = as -> line_head;
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86 while (cnt > 0)
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87 {
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88 ocnt = cnt;
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89
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90 // find an unresolved address
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91 for ( ; sl && exprok(as, sl -> addr) && exprok(as, sl -> daddr); sl = sl -> next)
0
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92 /* do nothing */ ;
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93
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94 // simplify address
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95 for (cl = sl; cl; cl = cl -> next)
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96 {
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97 as -> cl = sl;
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98 lwasm_reduce_expr(as, sl -> addr);
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99
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100 if (exprok(as, cl -> addr))
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101 {
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102 if (0 == --cnt)
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103 return;
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104 }
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105 lwasm_reduce_expr(as, sl -> daddr);
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106 if (exprok(as, cl -> addr))
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107 {
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108 if (0 == --cnt)
0
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109 return;
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110 }
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111 }
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112
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113 if (cnt == ocnt)
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114 break;
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115 }
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116
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117 if (cnt)
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118 {
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119 // we have non-resolved line addresses here
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120 for (cl = sl; cl; cl = cl -> next)
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121 {
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122 if (!exprok(as, cl -> addr))
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123 {
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124 lwasm_register_error(as, cl, E_LINE_ADDRESS);
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125 }
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126 if (!exprok(as, cl -> daddr))
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127 {
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128 lwasm_register_error(as, cl, E_LINED_ADDRESS);
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129 }
0
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130 }
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131 }
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132 }