146 lines
3.8 KiB
C
146 lines
3.8 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 "compiler.h"
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#include "mdq.h"
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#include "opcode.h"
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#include "indir_enum.h"
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#include "nametabtyp.h"
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#include "toktyp.h"
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#include "merge_def.h"
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#include "cmd.h"
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#include "mvalconv.h"
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#include "advancewindow.h"
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error_def(ERR_EQUAL);
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error_def(ERR_RPARENMISSING);
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error_def(ERR_VAREXPECTED);
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int m_merge(void)
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{
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int type;
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mval mv;
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opctype put_oc;
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oprtype mopr;
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triple *obp, *ref, *restart, *s1, *sub, tmpchain;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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restart = newtriple(OC_RESTARTPC); /* Here is where a restart should pick up */
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dqinit(&tmpchain, exorder);
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/* Left Hand Side of EQUAL sign */
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switch (TREF(window_token))
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{
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case TK_IDENT:
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if (!lvn(&mopr, OC_PUTINDX, 0))
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return FALSE;
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if (OC_PUTINDX == mopr.oprval.tref->opcode)
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{ /* we insert left hand side argument into tmpchain. */
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dqdel(mopr.oprval.tref, exorder);
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dqins(tmpchain.exorder.bl, exorder, mopr.oprval.tref);
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}
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ref = maketriple(OC_MERGE_LVARG);
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ref->operand[0] = put_ilit(MARG1_LCL);
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ref->operand[1] = mopr;
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dqins(tmpchain.exorder.bl, exorder, ref);
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break;
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case TK_CIRCUMFLEX:
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s1 = (TREF(curtchain))->exorder.bl;
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if (!gvn())
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return FALSE;
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for (sub = (TREF(curtchain))->exorder.bl; sub != s1; sub = sub->exorder.bl)
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{
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put_oc = sub->opcode;
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if (OC_GVNAME == put_oc || OC_GVNAKED == put_oc || OC_GVEXTNAM == put_oc)
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break;
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}
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assert((OC_GVNAME == put_oc) || (OC_GVNAKED == put_oc) || (OC_GVEXTNAM == put_oc));
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/* we insert left hand side argument into tmpchain. */
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dqdel(sub, exorder);
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dqins(tmpchain.exorder.bl ,exorder, sub);
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ref = maketriple(OC_MERGE_GVARG);
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ref->operand[0] = put_ilit(MARG1_GBL);
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dqins(tmpchain.exorder.bl, exorder, ref);
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break;
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case TK_ATSIGN:
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if (!indirection(&mopr))
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return FALSE;
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if (TK_EQUAL != TREF(window_token))
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{
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ref = newtriple(OC_COMMARG);
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ref->operand[0] = mopr;
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ref->operand[1] = put_ilit((mint) indir_merge);
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return TRUE;
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}
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type = MARG1_LCL | MARG1_GBL;
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MV_FORCE_MVAL(&mv, type);
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MV_FORCE_STRD(&mv);
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ref = maketriple(OC_INDMERGE);
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ref->operand[0] = put_lit(&mv);
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ref->operand[1] = mopr;
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/* we insert left hand side argument into tmpchain. */
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dqins(tmpchain.exorder.bl, exorder, ref);
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break;
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default:
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stx_error(ERR_VAREXPECTED);
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return FALSE;
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}
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if (TREF(window_token) != TK_EQUAL)
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{
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stx_error(ERR_EQUAL);
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return FALSE;
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}
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advancewindow();
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/* Right Hand Side of EQUAL sign */
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switch (TREF(window_token))
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{
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case TK_IDENT:
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if (!lvn(&mopr, OC_M_SRCHINDX, 0))
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return FALSE;
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ref = newtriple(OC_MERGE_LVARG);
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ref->operand[0] = put_ilit(MARG2_LCL);
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ref->operand[1] = mopr;
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break;
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case TK_CIRCUMFLEX:
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if (!gvn())
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return FALSE;
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ref = newtriple(OC_MERGE_GVARG);
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ref->operand[0] = put_ilit(MARG2_GBL);
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break;
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case TK_ATSIGN:
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if (!indirection(&mopr))
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{
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stx_error(ERR_VAREXPECTED);
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return FALSE;
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}
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type = MARG2_LCL | MARG2_GBL;
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MV_FORCE_MVAL(&mv, type);
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MV_FORCE_STRD(&mv);
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ref = maketriple(OC_INDMERGE);
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ref->operand[0] = put_lit(&mv);
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ref->operand[1] = mopr;
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ins_triple(ref);
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break;
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default:
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stx_error(ERR_VAREXPECTED);
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return FALSE;
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}
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/*
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* Make sure that during runtime right hand side argument is processed first.
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* This is specially important if global naked variable is used .
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*/
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obp = (TREF(curtchain))->exorder.bl;
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dqadd(obp, &tmpchain, exorder);
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ref = newtriple(OC_MERGE);
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return TRUE;
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}
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