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bug fixed in last_mnem(): test on nil-pointer.

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bug fixed in try_tail(): add line "if(l1==0||l2==0) return FALSE".
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bal 1985-01-23 16:13:57 +00:00
parent f487f26e00
commit 5a95c31414
1 changed files with 4 additions and 1 deletions
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5
util/ego/cj/cj.c
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@ -83,7 +83,9 @@ STATIC line_p last_mnem(b)
register line_p l;
for (l = b->b_start; l->l_next != (line_p) 0; l = l->l_next);
while (INSTR(l) < sp_fmnem || INSTR(l) > sp_lmnem) l = PREV(l);
while (l != (line_p) 0 && (INSTR(l) < sp_fmnem || INSTR(l) > sp_lmnem)) {
l = PREV(l);
}
return l;
}
@ -205,6 +207,7 @@ STATIC bool try_tail(b1,b2)
if (b1->b_start == (line_p) 0 || b2->b_start == (line_p) 0) return FALSE;
l1 = last_mnem(b1);
l2 = last_mnem(b2);
if (l1 == (line_p) 0 || l2 == (line_p) 0) return FALSE;
/* printf("consider:\n"); showinstr(l1); showinstr(l2); */
if (INSTR(l1) == op_bra) {
b = b1;