342 lines
8.1 KiB
C
342 lines
8.1 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* I N L I N E S U B S T I T U T I O N */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <em_path.h>
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#include <em_mnem.h>
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#include <em_pseu.h>
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#include "../share/types.h"
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#include "il.h"
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#include "../share/debug.h"
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#include "../share/alloc.h"
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#include "../share/global.h"
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#include "../share/lset.h"
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#include "../share/files.h"
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#include "../share/map.h"
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#include "il_aux.h"
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#include "il1_anal.h"
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#include "il2_aux.h"
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#include "il3_subst.h"
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#include "../share/get.h"
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#include "../share/put.h"
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#include "../share/go.h"
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int calnr;
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int complete_program;
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calcnt_p cchead; /* call-count info of current proc */
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STATIC long space = 0;
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STATIC long total_size = 0;
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STATIC char cname[128] = TMP_DIR;
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STATIC char ccname[128] = TMP_DIR;
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/* For debugging only */
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STATIC char sname[128] = TMP_DIR;
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STATIC int kp_temps = 0;
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int Ssubst;
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#ifdef VERBOSE
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int Senv,Srecursive,Slocals,Sinstrlab,Sparsefails,Spremoved,Scals;
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int Sbig_caller,Sdispensable,Schangedcallee,Sbigcallee,Sspace,Szeroratio;
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#endif
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/* P A S S 1
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*
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* Pass 1 reads and analyses the EM text and the CFG.
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* It determines for every procedure if it may be expanded
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* in line and how it uses its formal parameters.
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* It also collects all calls appearing in the program and
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* recognizes the actual parameters of every call.
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* The call descriptors are put in a file (calfile).
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*/
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pass1(lnam,bnam,cnam)
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char *lnam, *bnam, *cnam;
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{
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FILE *f, *gf, *cf, *ccf; /* The EM input, the basic block graph,
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* the call-list file and the calcnt file.
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*/
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long laddr;
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bblock_p g;
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short kind;
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line_p l;
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f = openfile(lnam,"r");
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gf = openfile(bnam,"r");
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cf = openfile(cnam,"w");
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ccf = openfile(ccname,"w");
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mesregs = Lempty_set();
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apriori(fproc);
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/* use information from the procedure table to
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* see which calls certainly cannot be expanded.
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*/
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while(TRUE) {
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laddr = ftell(f);
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if (!getunit(gf,f,&kind,&g,&l,&curproc,TRUE)) break;
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/* Read the control flow graph and EM text of
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* one procedure and analyze it.
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*/
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if (kind == LDATA) {
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remunit(LDATA,(proc_p) 0,l);
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continue;
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}
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OUTTRACE("flow graph of proc %d read",curproc->p_id);
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assert(INSTR(g->b_start) == ps_pro);
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curproc->p_start = g;
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curproc->P_LADDR = laddr;
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/* address of em text in em-file */
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/* address of graph in basic block file */
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curproc->P_SIZE = proclength(curproc); /* #instructions */
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total_size += curproc->P_SIZE;
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if (BIG_PROC(curproc)) {
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/* curproc is too large to be expanded in line */
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UNSUITABLE(curproc);
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}
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calnr = 0;
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anal_proc(curproc,cf,ccf);
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OUTTRACE("proc %d processed",curproc->p_id);
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remunit(LTEXT,curproc,(line_p) 0);
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/* remove control flow graph + text */
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OUTTRACE("graph of proc %d removed",curproc->p_id);
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Ldeleteset(mesregs);
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mesregs = Lempty_set();
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}
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fclose(f);
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fclose(gf);
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fclose(cf);
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fclose(ccf);
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}
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/* P A S S 2
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*
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* Pass 2 reads the calfile and determines which calls should
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* be expanded in line. It does not use the EM text.
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*/
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STATIC char cname2[128] = TMP_DIR;
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pass2(cnam,space)
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char *cnam;
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long space;
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{
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FILE *cf, *cf2, *ccf;
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call_p c,a;
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cf = openfile(cnam,"r");
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cf2 = openfile(cname2,"w");
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ccf = openfile(ccname,"r");
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while ((c = getcall(cf)) != (call_p) 0) {
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/* process all calls */
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if (SUITABLE(c->cl_proc) && anal_params(c)) {
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/* called proc. may be put in line */
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/* see which parameters may be put in line */
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assign_ratio(c); /* assign a rank */
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a = abstract(c); /* abstract essential info */
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append_abstract(a,a->cl_caller);
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/* put it in call-list of calling proc. */
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putcall(c,cf2,(short) 0);
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} else {
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rem_call(c);
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}
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}
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select_calls(fproc,ccf,space);
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fclose(cf); if (! kp_temps) unlink(cnam);
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fclose(cf2);
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fclose(ccf); if (! kp_temps) unlink(ccname);
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cf2 = openfile(cname2,"r");
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add_actuals(fproc,cf2);
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cleancals(fproc); /* remove calls that were not selected */
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/* add actual parameters to each selected call */
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fclose(cf2); if (! kp_temps) unlink(cname2);
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}
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/* P A S S 3
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*
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* pass 3 reads the substitution file and performs all
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* substitutions described in that file. It reads the
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* original EM text and produced a new (optimized)
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* EM textfile.
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*/
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pass3(lnam,lnam2)
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char *lnam,*lnam2;
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{
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bool verbose = TRUE;
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FILE *lfile, *lfilerand, *lfile2, *sfile;
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call_p c,next;
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line_p l,startscan,cal;
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short lastcid; /* last call-id seen */
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lfile = openfile(lnam, "r");
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lfilerand = openfile(lnam, "r");
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lfile2 = openfile(lnam2,"w");
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if (verbose) {
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sfile = openfile(sname,"w");
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}
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mesregs = Lempty_set();
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while ((l = get_text(lfile,&curproc)) != (line_p) 0) {
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if (curproc == (proc_p) 0) {
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/* Just a data-unit; no real instructions */
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putlines(l->l_next,lfile2);
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oldline(l);
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continue;
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}
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if (IS_DISPENSABLE(curproc)) {
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liquidate(curproc,l->l_next);
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} else {
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startscan = l->l_next;
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lastcid = 0;
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for (c = curproc->P_CALS; c != (call_p) 0; c = next) {
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next = c->cl_cdr;
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cal = scan_to_cal(startscan,c->cl_id - lastcid);
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assert (cal != (line_p) 0);
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startscan = scan_to_cal(cal->l_next,1);
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/* next CAL */
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lastcid = c->cl_id;
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/* next CAL after current one */
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substitute(lfilerand,c,cal,l->l_next);
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if (verbose) {
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putcall(c,sfile,0);
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} else {
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rem_call(c);
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}
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}
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}
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putlines(l->l_next,lfile2);
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Ldeleteset(mesregs);
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mesregs = Lempty_set();
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oldline(l);
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}
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fclose(lfile);
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fclose(lfile2);
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if (verbose) {
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fclose(sfile);
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if (! kp_temps) unlink(sname);
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}
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}
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STATIC il_extptab(ptab)
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proc_p ptab;
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{
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/* Allocate space for extension of proctable entries.
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* Also, initialise some of the fields just allocated.
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*/
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register proc_p p;
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for (p = ptab; p != (proc_p) 0; p = p->p_next) {
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p->p_extend = newilpx();
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p->P_ORGLABELS = p->p_nrlabels;
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p->P_ORGLOCALS = p->p_localbytes;
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}
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}
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STATIC il_cleanptab(ptab)
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proc_p ptab;
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{
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/* De-allocate space for extensions */
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register proc_p p;
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for (p = ptab; p != (proc_p) 0; p = p->p_next) {
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oldilpx(p->p_extend);
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}
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}
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#ifdef VERBOSE
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Sdiagnostics()
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{
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/* print statictical information */
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fprintf(stderr,"STATISTICS:\n");
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fprintf(stderr,"Info about procedures:\n");
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fprintf(stderr,"environment accessed: %d\n",Senv);
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fprintf(stderr,"recursive: %d\n",Srecursive);
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fprintf(stderr,"too many locals: %d\n",Slocals);
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fprintf(stderr,"instr. lab in data block: %d\n",Sinstrlab);
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fprintf(stderr,"procedures removed: %d\n",Spremoved);
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fprintf(stderr,"\nInfo about calls:\n");
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fprintf(stderr,"total number of calls: %d\n",Scals);
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fprintf(stderr,"total number of calls substituted: %d\n",Ssubst);
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fprintf(stderr,"parser failed: %d\n",Sparsefails);
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fprintf(stderr,"caller too big: %d\n",Sbig_caller);
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fprintf(stderr,"caller dispensable: %d\n",Sdispensable);
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fprintf(stderr,"callee is changed: %d\n",Schangedcallee);
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fprintf(stderr,"callee too big: %d\n",Sbigcallee);
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fprintf(stderr,"no space available: %d\n",Sspace);
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fprintf(stderr,"zero ratio: %d\n",Szeroratio);
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}
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#endif
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il_flags(p)
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char *p;
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{
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switch(*p++) {
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case 's':
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while (*p != '\0') {
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space = 10*space +*p++ -'0';
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}
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break;
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case 'a':
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complete_program = 1;
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break;
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case 't':
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strcpy(cname, ".");
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strcpy(ccname, ".");
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strcpy(sname, ".");
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strcpy(cname2, ".");
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kp_temps = 1;
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break;
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}
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}
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main(argc,argv)
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int argc;
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char *argv[];
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{
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FILE *f;
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go(argc,argv,no_action,no_action,no_action,il_flags);
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il_extptab(fproc); /* add extended data structures */
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strcat(cname, "/ego.i1.XXXXXX");
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strcat(ccname, "/ego.i2.XXXXXX");
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strcat(sname, "/ego.i3.XXXXXX");
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strcat(cname2, "/ego.i4.XXXXXX");
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mktemp(cname);
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mktemp(ccname);
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mktemp(sname);
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mktemp(cname2);
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pass1(lname,bname,cname); /* grep calls, analyse procedures */
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space = total_size * space / 100 ;
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pass2(cname,space); /* select calls to be expanded */
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pass3(lname,lname2); /* do substitutions */
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f = openfile(dname2,"w");
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il_cleanptab(fproc); /* remove extended data structures */
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putdtable(fdblock,f);
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f = openfile(pname2,"w");
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putptable(fproc,f,FALSE);
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report("inline substitutions",Ssubst);
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#ifdef VERBOSE
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if (verbose_flag) {
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Sdiagnostics();
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}
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#endif
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#ifdef DEBUG
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core_usage();
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#endif
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exit(0);
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}
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