56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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/* C O P Y P R O P A G A T I O N
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*
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* A U X I L I A R Y R O U T I N E S
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*/
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#include "../share/types.h"
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#include "../ud/ud.h"
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#include "../share/debug.h"
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#include "../share/global.h"
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#include "../share/alloc.h"
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#include "../share/lset.h"
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#include "../share/cset.h"
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#include "../share/def.h"
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#include "../share/locals.h"
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#include "../share/aux.h"
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#include "../../../h/em_mnem.h"
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#include "../../../h/em_pseu.h"
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#include "../../../h/em_spec.h"
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#include "../ud/ud_defs.h"
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repl_line(old,new,b)
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line_p old,new;
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bblock_p b;
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{
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/* Replace 'old' by 'new' */
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if (PREV(old) == (line_p) 0) {
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b->b_start = new;
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} else {
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PREV(old)->l_next = new;
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}
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PREV(new) = PREV(old);
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if ((new->l_next = old->l_next) != (line_p) 0) {
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PREV(new->l_next) = new;
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}
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oldline(old);
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}
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bool same_var(use,def)
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line_p use,def;
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{
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/* 'use' is an instruction that uses a variable
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* for which we maintain ud-info (e.g. a LOL).
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* See if 'def' references the same variable.
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*/
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if (TYPE(use) == OPOBJECT) {
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return TYPE(def) == OPOBJECT && OBJ(use) == OBJ(def);
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} else {
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return TYPE(def) != OPOBJECT && off_set(use) == off_set(def);
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}
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}
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