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freebsd-skq/contrib/gcc/graph.c

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Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Output routines for graphical representation.
Copyright (C) 1998, 1999 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <config.h>
#include "system.h"
#include "rtl.h"
#include "flags.h"
#include "output.h"
#include "hard-reg-set.h"
#include "basic-block.h"
#include "toplev.h"
static const char *graph_ext[] =
{
/* no_graph */ "",
/* vcg */ ".vcg",
};
/* Output text for new basic block. */
static void
start_fct (fp)
FILE *fp;
{
switch (graph_dump_format)
{
case vcg:
fprintf (fp, "\
graph: { title: \"%s\"\nfolding: 1\nhidden: 2\nnode: { title: \"%s.0\" }\n",
current_function_name, current_function_name);
break;
case no_graph:
break;
}
}
static void
start_bb (fp, bb)
FILE *fp;
int bb;
{
switch (graph_dump_format)
{
case vcg:
fprintf (fp, "\
graph: {\ntitle: \"%s.BB%d\"\nfolding: 1\ncolor: lightblue\n\
label: \"basic block %d",
current_function_name, bb, bb);
break;
case no_graph:
break;
}
#if 0
/* FIXME Should this be printed? It makes the graph significantly larger. */
/* Print the live-at-start register list. */
fputc ('\n', fp);
EXECUTE_IF_SET_IN_REG_SET (basic_block_live_at_start[bb], 0, i,
{
fprintf (fp, " %d", i);
if (i < FIRST_PSEUDO_REGISTER)
fprintf (fp, " [%s]",
reg_names[i]);
});
#endif
switch (graph_dump_format)
{
case vcg:
fputs ("\"\n\n", fp);
break;
case no_graph:
break;
}
}
static void
node_data (fp, tmp_rtx)
FILE *fp;
rtx tmp_rtx;
{
if (PREV_INSN (tmp_rtx) == 0)
{
/* This is the first instruction. Add an edge from the starting
block. */
switch (graph_dump_format)
{
case vcg:
fprintf (fp, "\
edge: { sourcename: \"%s.0\" targetname: \"%s.%d\" }\n",
current_function_name,
current_function_name, XINT (tmp_rtx, 0));
break;
case no_graph:
break;
}
}
switch (graph_dump_format)
{
case vcg:
fprintf (fp, "node: {\n title: \"%s.%d\"\n color: %s\n \
label: \"%s %d\n",
current_function_name, XINT (tmp_rtx, 0),
GET_CODE (tmp_rtx) == NOTE ? "lightgrey"
: GET_CODE (tmp_rtx) == INSN ? "green"
: GET_CODE (tmp_rtx) == JUMP_INSN ? "darkgreen"
: GET_CODE (tmp_rtx) == CALL_INSN ? "darkgreen"
: GET_CODE (tmp_rtx) == CODE_LABEL ? "\
darkgrey\n shape: ellipse" : "white",
GET_RTX_NAME (GET_CODE (tmp_rtx)), XINT (tmp_rtx, 0));
break;
case no_graph:
break;
}
/* Print the RTL. */
if (GET_CODE (tmp_rtx) == NOTE)
{
static const char *note_names[] =
{
NULL,
"deleted",
"block_beg",
"block_end",
"loop_beg",
"loop_end",
"function_end",
"setjmp",
"loop_cont",
"loop_vtop",
"prologue_end",
"epilogue_beg",
"deleted_label",
"function_beg",
"eh_region_beg",
"eh_region_end",
"repeated_line_number",
"range_start",
"range_end",
"live",
"basic_block"
};
fprintf (fp, " %s",
XINT (tmp_rtx, 4) < 0 ? note_names[-XINT (tmp_rtx, 4)] : "");
}
else if (GET_RTX_CLASS (GET_CODE (tmp_rtx)) == 'i')
print_rtl_single (fp, PATTERN (tmp_rtx));
else
print_rtl_single (fp, tmp_rtx);
switch (graph_dump_format)
{
case vcg:
fputs ("\"\n}\n", fp);
break;
case no_graph:
break;
}
}
static void
draw_edge (fp, from, to, bb_edge, class)
FILE *fp;
int from;
int to;
int bb_edge;
int class;
{
char * color;
switch (graph_dump_format)
{
case vcg:
color = "";
if (class == 2)
color = "color: red ";
else if (bb_edge)
color = "color: blue ";
else if (class == 3)
color = "color: green ";
fprintf (fp,
"edge: { sourcename: \"%s.%d\" targetname: \"%s.%d\" %s",
current_function_name, from,
current_function_name, to, color);
if (class)
fprintf (fp, "class: %d ", class);
fputs ("}\n", fp);
break;
case no_graph:
break;
}
}
static void
end_bb (fp, bb)
FILE *fp;
int bb ATTRIBUTE_UNUSED;
{
switch (graph_dump_format)
{
case vcg:
fputs ("}\n", fp);
break;
case no_graph:
break;
}
}
static void
end_fct (fp)
FILE *fp;
{
switch (graph_dump_format)
{
case vcg:
fprintf (fp, "node: { title: \"%s.999999\" label: \"END\" }\n}\n",
current_function_name);
break;
case no_graph:
break;
}
}
/* Like print_rtl, but also print out live information for the start of each
basic block. */
void
print_rtl_graph_with_bb (base, suffix, rtx_first)
const char *base;
const char *suffix;
rtx rtx_first;
{
register rtx tmp_rtx;
size_t namelen = strlen (base);
size_t suffixlen = strlen (suffix);
size_t extlen = strlen (graph_ext[graph_dump_format]) + 1;
char *buf = (char *) alloca (namelen + suffixlen + extlen);
FILE *fp;
if (basic_block_info == NULL)
return;
memcpy (buf, base, namelen);
memcpy (buf + namelen, suffix, suffixlen);
memcpy (buf + namelen + suffixlen, graph_ext[graph_dump_format], extlen);
fp = fopen (buf, "a");
if (fp == NULL)
return;
if (rtx_first == 0)
fprintf (fp, "(nil)\n");
else
{
int i;
enum bb_state { NOT_IN_BB, IN_ONE_BB, IN_MULTIPLE_BB };
int max_uid = get_max_uid ();
int *start = (int *) alloca (max_uid * sizeof (int));
int *end = (int *) alloca (max_uid * sizeof (int));
enum bb_state *in_bb_p = (enum bb_state *)
alloca (max_uid * sizeof (enum bb_state));
basic_block bb;
for (i = 0; i < max_uid; ++i)
{
start[i] = end[i] = -1;
in_bb_p[i] = NOT_IN_BB;
}
for (i = n_basic_blocks - 1; i >= 0; --i)
{
rtx x;
bb = BASIC_BLOCK (i);
start[INSN_UID (bb->head)] = i;
end[INSN_UID (bb->end)] = i;
for (x = bb->head; x != NULL_RTX; x = NEXT_INSN (x))
{
in_bb_p[INSN_UID (x)]
= (in_bb_p[INSN_UID (x)] == NOT_IN_BB)
? IN_ONE_BB : IN_MULTIPLE_BB;
if (x == bb->end)
break;
}
}
/* Tell print-rtl that we want graph output. */
dump_for_graph = 1;
/* Start new function. */
start_fct (fp);
for (tmp_rtx = NEXT_INSN (rtx_first); NULL != tmp_rtx;
tmp_rtx = NEXT_INSN (tmp_rtx))
{
int edge_printed = 0;
rtx next_insn;
if (start[INSN_UID (tmp_rtx)] < 0 && end[INSN_UID (tmp_rtx)] < 0)
{
if (GET_CODE (tmp_rtx) == BARRIER)
continue;
if (GET_CODE (tmp_rtx) == NOTE
&& (1 || in_bb_p[INSN_UID (tmp_rtx)] == NOT_IN_BB))
continue;
}
if ((i = start[INSN_UID (tmp_rtx)]) >= 0)
{
/* We start a subgraph for each basic block. */
start_bb (fp, i);
if (i == 0)
draw_edge (fp, 0, INSN_UID (tmp_rtx), 1, 0);
}
/* Print the data for this node. */
node_data (fp, tmp_rtx);
next_insn = next_nonnote_insn (tmp_rtx);
if ((i = end[INSN_UID (tmp_rtx)]) >= 0)
{
edge e;
bb = BASIC_BLOCK (i);
/* End of the basic block. */
end_bb (fp, bb);
/* Now specify the edges to all the successors of this
basic block. */
for (e = bb->succ; e ; e = e->succ_next)
{
if (e->dest != EXIT_BLOCK_PTR)
{
rtx block_head = e->dest->head;
draw_edge (fp, INSN_UID (tmp_rtx),
INSN_UID (block_head),
next_insn != block_head,
(e->flags & EDGE_ABNORMAL ? 2 : 0));
if (block_head == next_insn)
edge_printed = 1;
}
else
{
draw_edge (fp, INSN_UID (tmp_rtx), 999999,
next_insn != 0,
(e->flags & EDGE_ABNORMAL ? 2 : 0));
if (next_insn == 0)
edge_printed = 1;
}
}
}
if (!edge_printed)
{
/* Don't print edges to barriers. */
if (next_insn == 0
|| GET_CODE (next_insn) != BARRIER)
draw_edge (fp, XINT (tmp_rtx, 0),
next_insn ? INSN_UID (next_insn) : 999999, 0, 0);
else
{
/* We draw the remaining edges in class 3. We have
to skip over the barrier since these nodes are
not printed at all. */
do
next_insn = NEXT_INSN (next_insn);
while (next_insn
&& (GET_CODE (next_insn) == NOTE
|| GET_CODE (next_insn) == BARRIER));
draw_edge (fp, XINT (tmp_rtx, 0),
next_insn ? INSN_UID (next_insn) : 999999, 0, 3);
}
}
}
dump_for_graph = 0;
end_fct (fp);
}
fclose (fp);
}
/* Similar as clean_dump_file, but this time for graph output files. */
void
clean_graph_dump_file (base, suffix)
const char *base;
const char *suffix;
{
size_t namelen = strlen (base);
size_t suffixlen = strlen (suffix);
size_t extlen = strlen (graph_ext[graph_dump_format]) + 1;
char *buf = (char *) alloca (namelen + extlen + suffixlen);
FILE *fp;
memcpy (buf, base, namelen);
memcpy (buf + namelen, suffix, suffixlen);
memcpy (buf + namelen + suffixlen, graph_ext[graph_dump_format], extlen);
fp = fopen (buf, "w");
if (fp == NULL)
pfatal_with_name (buf);
switch (graph_dump_format)
{
case vcg:
fputs ("graph: {\nport_sharing: no\n", fp);
break;
case no_graph:
abort ();
}
fclose (fp);
}
/* Do final work on the graph output file. */
void
finish_graph_dump_file (base, suffix)
const char *base;
const char *suffix;
{
size_t namelen = strlen (base);
size_t suffixlen = strlen (suffix);
size_t extlen = strlen (graph_ext[graph_dump_format]) + 1;
char *buf = (char *) alloca (namelen + suffixlen + extlen);
FILE *fp;
memcpy (buf, base, namelen);
memcpy (buf + namelen, suffix, suffixlen);
memcpy (buf + namelen + suffixlen, graph_ext[graph_dump_format], extlen);
fp = fopen (buf, "a");
if (fp != NULL)
{
switch (graph_dump_format)
{
case vcg:
fputs ("}\n", fp);
break;
case no_graph:
abort ();
}
fclose (fp);
}
}
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