220 lines
6.6 KiB
C
220 lines
6.6 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "compiler.h"
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#include "opcode.h"
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#include "toktyp.h"
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#include "advancewindow.h"
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#include "mlabel2xtern.h"
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#include "mrout2xtern.h"
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#include "gtmimagename.h"
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#include "rtnhdr.h"
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#include "stack_frame.h"
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GBLREF stack_frame *frame_pointer;
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GBLREF mident routine_name;
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error_def(ERR_LABELEXPECTED);
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error_def(ERR_RTNNAME);
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triple *entryref(opctype op1, opctype op2, mint commargcode, boolean_t can_commarg, boolean_t labref, boolean_t textname)
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{
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oprtype offset, label, routine, rte1;
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char rtn_text[SIZEOF(mident_fixed)], lab_text[SIZEOF(mident_fixed)];
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mident rtnname, labname;
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mstr rtn_str, lbl_str;
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triple *ref, *next, *rettrip;
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boolean_t same_rout;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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rtnname.len = labname.len = 0;
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rtnname.addr = &rtn_text[0];
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labname.addr = &lab_text[0];
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/* These cases don't currently exist but if they start to exist, the code in this
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* routine needs to be revisited for proper operation as the textname conditions
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* were assumed not to happen if can_commarg was FALSE (which it is in the one
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* known use of textname TRUE - in m_zgoto).
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*/
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assert(!(can_commarg && textname));
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switch (TREF(window_token))
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{
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case TK_INTLIT:
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int_label();
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/* caution: fall through */
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case TK_IDENT:
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memcpy(labname.addr, (TREF(window_ident)).addr, (TREF(window_ident)).len);
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labname.len = (TREF(window_ident)).len;
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advancewindow();
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if ((TK_PLUS != TREF(window_token)) && (TK_CIRCUMFLEX != TREF(window_token)) && !IS_MCODE_RUNNING && can_commarg)
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{
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rettrip = newtriple(op1);
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rettrip->operand[0] = put_mlab(&labname);
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return rettrip;
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}
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label.oprclass = 0;
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break;
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case TK_ATSIGN:
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if(!indirection(&label))
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return NULL;
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if ((TK_PLUS != TREF(window_token)) && (TK_CIRCUMFLEX != TREF(window_token)) && (TK_COLON != TREF(window_token))
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&& can_commarg)
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{
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rettrip = ref = maketriple(OC_COMMARG);
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ref->operand[0] = label;
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ref->operand[1] = put_ilit(commargcode);
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ins_triple(ref);
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return rettrip;
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}
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labname.len = 0;
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break;
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case TK_PLUS:
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stx_error(ERR_LABELEXPECTED);
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return NULL;
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default:
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labname.len = 0;
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label.oprclass = 0;
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break;
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}
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if (!labref && (TK_PLUS == TREF(window_token)))
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{ /* Have line offset specified */
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advancewindow();
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if (EXPR_FAIL == expr(&offset, MUMPS_INT))
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return NULL;
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} else
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offset.oprclass = 0;
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if (TK_CIRCUMFLEX == TREF(window_token))
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{ /* Have a routine name specified */
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advancewindow();
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switch (TREF(window_token))
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{
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case TK_IDENT:
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MROUT2XTERN((TREF(window_ident)).addr, rtnname.addr, (TREF(window_ident)).len);
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rtn_str.len = rtnname.len = (TREF(window_ident)).len;
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rtn_str.addr = rtnname.addr;
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advancewindow();
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if (!IS_MCODE_RUNNING)
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{ /* Triples for indirect code */
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same_rout = (MIDENT_EQ(&rtnname, &routine_name) && can_commarg);
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if (!textname)
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{ /* Resolve routine and label names to addresses for most calls */
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if (!label.oprclass && !offset.oprclass)
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{ /* Routine only (no label or offset) */
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if (same_rout)
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{
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rettrip = newtriple(op1);
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rettrip->operand[0] = put_mlab(&labname);
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} else
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{
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rettrip = maketriple(op2);
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if (rtnname.addr[0] == '%')
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rtnname.addr[0] = '_';
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rettrip->operand[0] = put_cdlt(&rtn_str);
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mlabel2xtern(&lbl_str, &rtnname, &labname);
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rettrip->operand[1] = put_cdlt(&lbl_str);
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ins_triple(rettrip);
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}
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return rettrip;
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} else if (!same_rout)
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{
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rte1 = put_str(rtn_str.addr, rtn_str.len);
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if (rtnname.addr[0] == '%')
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rtnname.addr[0] = '_';
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routine = put_cdlt(&rtn_str);
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ref = newtriple(OC_RHDADDR);
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ref->operand[0] = rte1;
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ref->operand[1] = routine;
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routine = put_tref(ref);
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} else
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routine = put_tref(newtriple(OC_CURRHD));
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} else
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{ /* Return the actual names used */
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if (!label.oprclass && !offset.oprclass)
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{ /* Routine only (no label or offset) */
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rettrip = maketriple(op2);
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rettrip->operand[0] = put_str(rtn_str.addr, rtn_str.len);
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ref = newtriple(OC_PARAMETER);
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ref->operand[0] = put_str(labname.addr, labname.len);
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ref->operand[1] = put_ilit(0);
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rettrip->operand[1] = put_tref(ref);
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ins_triple(rettrip);
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return rettrip;
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} else
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routine = put_str(rtn_str.addr, rtn_str.len);
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}
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} else
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{ /* Triples for normal compiled code */
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routine = put_str(rtn_str.addr, rtn_str.len);
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if (!textname)
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{ /* If not returning text name, convert text name to routine header address */
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ref = newtriple(OC_RHDADDR1);
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ref->operand[0] = routine;
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routine = put_tref(ref);
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}
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}
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break;
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case TK_ATSIGN:
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if (!indirection(&routine))
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return NULL;
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if (!textname)
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{ /* If not returning text name, convert text name to routine header address */
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ref = newtriple(OC_RHDADDR1);
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ref->operand[0] = routine;
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routine = put_tref(ref);
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}
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break;
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default:
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stx_error(ERR_RTNNAME);
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return NULL;
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}
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} else
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{
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if (!label.oprclass && (0 == labname.len))
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{
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stx_error(ERR_LABELEXPECTED);
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return NULL;
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}
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if (!textname)
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routine = put_tref(newtriple(OC_CURRHD));
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else
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{ /* If we need a name, the mechanism to retrieve it differs between normal and indirect compilation */
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if (!IS_MCODE_RUNNING)
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/* For normal compile, use routine name set when started compile */
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routine = put_str(routine_name.addr, routine_name.len);
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else
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/* For an indirect compile, obtain the currently running routine header and pull the routine
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* name out of that.
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*/
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routine = put_str(frame_pointer->rvector->routine_name.addr,
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frame_pointer->rvector->routine_name.len);
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}
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}
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if (!offset.oprclass)
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offset = put_ilit(0);
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if (!label.oprclass)
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label = put_str(labname.addr, labname.len);
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ref = textname ? newtriple(OC_PARAMETER) : newtriple(OC_LABADDR);
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ref->operand[0] = label;
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next = newtriple(OC_PARAMETER);
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ref->operand[1] = put_tref(next);
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next->operand[0] = offset;
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if (!textname)
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next->operand[1] = routine; /* Not needed if giving text names */
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rettrip = next = newtriple(op2);
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next->operand[0] = routine;
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next->operand[1] = put_tref(ref);
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return rettrip;
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}
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