376 lines
8.7 KiB
C
376 lines
8.7 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 <unistd.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 "il1_aux.h"
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#include "il2_aux.h"
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#include "il3_change.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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#include <limits.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[NAME_MAX];
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STATIC char ccname[NAME_MAX];
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STATIC char cname2[NAME_MAX];
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/* For debugging only */
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STATIC char sname[NAME_MAX];
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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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STATIC void pass1(const char *lnam, const char *bnam, const char *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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{
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laddr = ftell(f);
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if (!getunit(gf, f, &kind, &g, &l, &curproc, TRUE))
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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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{
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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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{
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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 void pass2(const char *cnam, 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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{
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/* process all calls */
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if (SUITABLE(c->cl_proc) && anal_params(c))
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{
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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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}
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else
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{
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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);
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if (!kp_temps)
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unlink(cnam);
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fclose(cf2);
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fclose(ccf);
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if (!kp_temps)
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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);
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if (!kp_temps)
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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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void pass3(const char *lnam, const char *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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{
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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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{
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if (curproc == (proc_p)0)
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{
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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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{
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liquidate(curproc, l->l_next);
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}
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else
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{
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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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{
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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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{
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putcall(c, sfile, 0);
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}
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else
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{
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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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{
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fclose(sfile);
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if (!kp_temps)
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unlink(sname);
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}
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}
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STATIC void 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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{
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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 void 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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{
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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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STATIC void 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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void il_flags(void *vp)
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{
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char *p = vp;
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switch (*p++)
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{
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case 's':
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while (*p != '\0')
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{
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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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int main(argc, argv) int argc;
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char* argv[];
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{
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struct files* files = findfiles(argc, argv);
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FILE* f;
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char* tmpdir = getenv("TMPDIR");
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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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if (!tmpdir)
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tmpdir = "/tmp";
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strcpy(cname, tmpdir);
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strcpy(ccname, tmpdir);
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strcpy(sname, tmpdir);
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strcpy(cname2, tmpdir);
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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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close(mkstemp(cname));
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close(mkstemp(ccname));
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close(mkstemp(sname));
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close(mkstemp(cname2));
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pass1(files->lname_in, files->bname_in, 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(files->lname_in, files->lname_out); /* do substitutions */
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f = openfile(files->dname_out, "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(files->pname_out, "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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{
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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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