/* Convert RTL to assembler code and output it, for GNU compiler.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GCC.
GCC 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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* This is the final pass of the compiler.
It looks at the rtl code for a function and outputs assembler code.
#include "debug.h"
#include "expr.h"
#include "cfglayout.h"
+#include "tree-pass.h"
+#include "timevar.h"
+#include "cgraph.h"
+#include "coverage.h"
+#include "df.h"
+#include "vecprim.h"
+#include "ggc.h"
#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h" /* Needed for external data
#include "dbxout.h"
#endif
+#ifdef SDB_DEBUGGING_INFO
+#include "sdbout.h"
+#endif
+
/* If we aren't using cc0, CC_STATUS_INIT shouldn't exist. So define a
null default for it to save conditionalization later. */
#ifndef CC_STATUS_INIT
/* Is the given character a logical line separator for the assembler? */
#ifndef IS_ASM_LOGICAL_LINE_SEPARATOR
-#define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == ';')
+#define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == ';')
#endif
#ifndef JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION 0
#endif
-#if defined(READONLY_DATA_SECTION) || defined(READONLY_DATA_SECTION_ASM_OP)
-#define HAVE_READONLY_DATA_SECTION 1
-#else
-#define HAVE_READONLY_DATA_SECTION 0
-#endif
-
/* Bitflags used by final_scan_insn. */
#define SEEN_BB 1
#define SEEN_NOTE 2
/* Filename of last NOTE. */
static const char *last_filename;
-extern int length_unit_log; /* This is defined in insn-attrtab.c. */
+/* Override filename and line number. */
+static const char *override_filename;
+static int override_linenum;
+
+/* Whether to force emission of a line note before the next insn. */
+static bool force_source_line = false;
+
+extern const int length_unit_log; /* This is defined in insn-attrtab.c. */
/* Nonzero while outputting an `asm' with operands.
This means that inconsistencies are the user's fault, so don't die.
CC_STATUS cc_prev_status;
#endif
-/* Indexed by hardware reg number, is 1 if that register is ever
- used in the current function.
-
- In life_analysis, or in stupid_life_analysis, this is set
- up to record the hard regs used explicitly. Reload adds
- in the hard regs used for holding pseudo regs. Final uses
- it to generate the code in the function prologue and epilogue
- to save and restore registers as needed. */
-
-char regs_ever_live[FIRST_PSEUDO_REGISTER];
-
-/* Like regs_ever_live, but 1 if a reg is set or clobbered from an asm.
- Unlike regs_ever_live, elements of this array corresponding to
- eliminable regs like the frame pointer are set if an asm sets them. */
-
-char regs_asm_clobbered[FIRST_PSEUDO_REGISTER];
-
/* Nonzero means current function must be given a frame pointer.
Initialized in function.c to 0. Set only in reload1.c as per
the needs of the function. */
static void profile_function (FILE *);
static void profile_after_prologue (FILE *);
static bool notice_source_line (rtx);
-static rtx walk_alter_subreg (rtx *);
+static rtx walk_alter_subreg (rtx *, bool *);
static void output_asm_name (void);
static void output_alternate_entry_point (FILE *, rtx);
static tree get_mem_expr_from_op (rtx, int *);
static int *insn_lengths;
-varray_type insn_addresses_;
+VEC(int,heap) *insn_addresses_;
/* Max uid for which the above arrays are valid. */
static int insn_lengths_max_uid;
}
/* Obtain the current length of an insn. If branch shortening has been done,
- get its actual length. Otherwise, get its maximum length. */
-
-int
-get_attr_length (rtx insn ATTRIBUTE_UNUSED)
+ get its actual length. Otherwise, use FALLBACK_FN to calculate the
+ length. */
+static inline int
+get_attr_length_1 (rtx insn ATTRIBUTE_UNUSED,
+ int (*fallback_fn) (rtx) ATTRIBUTE_UNUSED)
{
#ifdef HAVE_ATTR_length
rtx body;
return 0;
case CALL_INSN:
- length = insn_default_length (insn);
+ length = fallback_fn (insn);
break;
case JUMP_INSN:
ADDR_VEC_ALIGN. */
}
else
- length = insn_default_length (insn);
+ length = fallback_fn (insn);
break;
case INSN:
return 0;
else if (GET_CODE (body) == ASM_INPUT || asm_noperands (body) >= 0)
- length = asm_insn_count (body) * insn_default_length (insn);
+ length = asm_insn_count (body) * fallback_fn (insn);
else if (GET_CODE (body) == SEQUENCE)
for (i = 0; i < XVECLEN (body, 0); i++)
length += get_attr_length (XVECEXP (body, 0, i));
else
- length = insn_default_length (insn);
+ length = fallback_fn (insn);
break;
default:
return length;
#else /* not HAVE_ATTR_length */
return 0;
+#define insn_default_length 0
+#define insn_min_length 0
#endif /* not HAVE_ATTR_length */
}
+
+/* Obtain the current length of an insn. If branch shortening has been done,
+ get its actual length. Otherwise, get its maximum length. */
+int
+get_attr_length (rtx insn)
+{
+ return get_attr_length_1 (insn, insn_default_length);
+}
+
+/* Obtain the current length of an insn. If branch shortening has been done,
+ get its actual length. Otherwise, get its minimum length. */
+int
+get_attr_min_length (rtx insn)
+{
+ return get_attr_length_1 (insn, insn_min_length);
+}
\f
/* Code to handle alignment inside shorten_branches. */
}
#endif /* HAVE_ATTR_length */
\f
-void
+/* Compute branch alignments based on frequency information in the
+ CFG. */
+
+static unsigned int
compute_alignments (void)
{
int log, max_skip, max_log;
max_labelno = max_label_num ();
min_labelno = get_first_label_num ();
- label_align = xcalloc (max_labelno - min_labelno + 1,
- sizeof (struct label_alignment));
+ label_align = XCNEWVEC (struct label_alignment, max_labelno - min_labelno + 1);
/* If not optimizing or optimizing for size, don't assign any alignments. */
if (! optimize || optimize_size)
- return;
+ return 0;
FOR_EACH_BB (bb)
{
LABEL_TO_ALIGNMENT (label) = max_log;
LABEL_TO_MAX_SKIP (label) = max_skip;
}
+ return 0;
}
+
+struct tree_opt_pass pass_compute_alignments =
+{
+ NULL, /* name */
+ NULL, /* gate */
+ compute_alignments, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ 0 /* letter */
+};
+
\f
/* Make a pass over all insns and compute their actual lengths by shortening
any branches of variable length if possible. */
/* Free uid_shuid before reallocating it. */
free (uid_shuid);
-
- uid_shuid = xmalloc (max_uid * sizeof *uid_shuid);
+
+ uid_shuid = XNEWVEC (int, max_uid);
if (max_labelno != max_label_num ())
{
INSN_SHUID (insn) = i++;
if (INSN_P (insn))
- {
- /* reorg might make the first insn of a loop being run once only,
- and delete the label in front of it. Then we want to apply
- the loop alignment to the new label created by reorg, which
- is separated by the former loop start insn from the
- NOTE_INSN_LOOP_BEG. */
- }
- else if (LABEL_P (insn))
+ continue;
+
+ if (LABEL_P (insn))
{
rtx next;
next = next_nonnote_insn (insn);
/* ADDR_VECs only take room if read-only data goes into the text
section. */
- if (JUMP_TABLES_IN_TEXT_SECTION || !HAVE_READONLY_DATA_SECTION)
+ if (JUMP_TABLES_IN_TEXT_SECTION
+ || readonly_data_section == text_section)
if (next && JUMP_P (next))
{
rtx nextbody = PATTERN (next);
#ifdef HAVE_ATTR_length
/* Allocate the rest of the arrays. */
- insn_lengths = xmalloc (max_uid * sizeof (*insn_lengths));
+ insn_lengths = XNEWVEC (int, max_uid);
insn_lengths_max_uid = max_uid;
/* Syntax errors can lead to labels being outside of the main insn stream.
Initialize insn_addresses, so that we get reproducible results. */
INSN_ADDRESSES_ALLOC (max_uid);
- varying_length = xcalloc (max_uid, sizeof (char));
+ varying_length = XCNEWVEC (char, max_uid);
/* Initialize uid_align. We scan instructions
from end to start, and keep in align_tab[n] the last seen insn
that does an alignment of at least n+1, i.e. the successor
in the alignment chain for an insn that does / has a known
alignment of n. */
- uid_align = xcalloc (max_uid, sizeof *uid_align);
+ uid_align = XCNEWVEC (rtx, max_uid);
for (i = MAX_CODE_ALIGN; --i >= 0;)
align_tab[i] = NULL_RTX;
{
/* This only takes room if read-only data goes into the text
section. */
- if (JUMP_TABLES_IN_TEXT_SECTION || !HAVE_READONLY_DATA_SECTION)
+ if (JUMP_TABLES_IN_TEXT_SECTION
+ || readonly_data_section == text_section)
insn_lengths[uid] = (XVECLEN (body,
GET_CODE (body) == ADDR_DIFF_VEC)
* GET_MODE_SIZE (GET_MODE (body)));
PUT_MODE (body, CASE_VECTOR_SHORTEN_MODE (min_addr - rel_addr,
max_addr - rel_addr,
body));
- if (JUMP_TABLES_IN_TEXT_SECTION || !HAVE_READONLY_DATA_SECTION)
+ if (JUMP_TABLES_IN_TEXT_SECTION
+ || readonly_data_section == text_section)
{
insn_lengths[uid]
= (XVECLEN (body, 1) * GET_MODE_SIZE (GET_MODE (body)));
if (GET_CODE (body) == ASM_INPUT)
template = XSTR (body, 0);
else
- template = decode_asm_operands (body, NULL, NULL, NULL, NULL);
+ template = decode_asm_operands (body, NULL, NULL, NULL, NULL, NULL);
for (; *template; template++)
- if (IS_ASM_LOGICAL_LINE_SEPARATOR (*template) || *template == '\n')
+ if (IS_ASM_LOGICAL_LINE_SEPARATOR (*template, template)
+ || *template == '\n')
count++;
return count;
}
#endif
\f
+/* ??? This is probably the wrong place for these. */
+/* Structure recording the mapping from source file and directory
+ names at compile time to those to be embedded in debug
+ information. */
+typedef struct debug_prefix_map
+{
+ const char *old_prefix;
+ const char *new_prefix;
+ size_t old_len;
+ size_t new_len;
+ struct debug_prefix_map *next;
+} debug_prefix_map;
+
+/* Linked list of such structures. */
+debug_prefix_map *debug_prefix_maps;
+
+
+/* Record a debug file prefix mapping. ARG is the argument to
+ -fdebug-prefix-map and must be of the form OLD=NEW. */
+
+void
+add_debug_prefix_map (const char *arg)
+{
+ debug_prefix_map *map;
+ const char *p;
+
+ p = strchr (arg, '=');
+ if (!p)
+ {
+ error ("invalid argument %qs to -fdebug-prefix-map", arg);
+ return;
+ }
+ map = XNEW (debug_prefix_map);
+ map->old_prefix = ggc_alloc_string (arg, p - arg);
+ map->old_len = p - arg;
+ p++;
+ map->new_prefix = ggc_strdup (p);
+ map->new_len = strlen (p);
+ map->next = debug_prefix_maps;
+ debug_prefix_maps = map;
+}
+
+/* Perform user-specified mapping of debug filename prefixes. Return
+ the new name corresponding to FILENAME. */
+
+const char *
+remap_debug_filename (const char *filename)
+{
+ debug_prefix_map *map;
+ char *s;
+ const char *name;
+ size_t name_len;
+
+ for (map = debug_prefix_maps; map; map = map->next)
+ if (strncmp (filename, map->old_prefix, map->old_len) == 0)
+ break;
+ if (!map)
+ return filename;
+ name = filename + map->old_len;
+ name_len = strlen (name) + 1;
+ s = (char *) alloca (name_len + map->new_len);
+ memcpy (s, map->new_prefix, map->new_len);
+ memcpy (s + map->new_len, name, name_len);
+ return ggc_strdup (s);
+}
+\f
/* Output assembler code for the start of a function,
and initialize some of the variables in this file
for the new function. The label for the function and associated
function. */
if (write_symbols)
{
- remove_unnecessary_notes ();
reemit_insn_block_notes ();
number_blocks (current_function_decl);
/* We never actually put out begin/end notes for the top-level
if (! NO_PROFILE_COUNTERS)
{
int align = MIN (BIGGEST_ALIGNMENT, LONG_TYPE_SIZE);
- data_section ();
+ switch_to_section (data_section);
ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT));
targetm.asm_out.internal_label (file, "LP", current_function_funcdef_no);
assemble_integer (const0_rtx, LONG_TYPE_SIZE / BITS_PER_UNIT, align, 1);
}
- current_function_section (current_function_decl);
+ switch_to_section (current_function_section ());
#if defined(ASM_OUTPUT_REG_PUSH)
if (sval && svrtx != NULL_RTX && REG_P (svrtx))
- ASM_OUTPUT_REG_PUSH (file, REGNO (svrtx));
+ {
+ ASM_OUTPUT_REG_PUSH (file, REGNO (svrtx));
+ }
#endif
#if defined(STATIC_CHAIN_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH)
#if defined(ASM_OUTPUT_REG_PUSH)
if (sval && svrtx != NULL_RTX && REG_P (svrtx))
- ASM_OUTPUT_REG_POP (file, REGNO (svrtx));
+ {
+ ASM_OUTPUT_REG_POP (file, REGNO (svrtx));
+ }
#endif
}
last_ignored_compare = 0;
-#ifdef SDB_DEBUGGING_INFO
- /* When producing SDB debugging info, delete troublesome line number
- notes from inlined functions in other files as well as duplicate
- line number notes. */
- if (write_symbols == SDB_DEBUG)
- {
- rtx last = 0;
- for (insn = first; insn; insn = NEXT_INSN (insn))
- if (NOTE_P (insn) && NOTE_LINE_NUMBER (insn) > 0)
- {
- if (last != 0
-#ifdef USE_MAPPED_LOCATION
- && NOTE_SOURCE_LOCATION (insn) == NOTE_SOURCE_LOCATION (last)
-#else
- && NOTE_LINE_NUMBER (insn) == NOTE_LINE_NUMBER (last)
- && NOTE_SOURCE_FILE (insn) == NOTE_SOURCE_FILE (last)
-#endif
- )
- {
- delete_insn (insn); /* Use delete_note. */
- continue;
- }
- last = insn;
- }
- }
-#endif
-
for (insn = first; insn; insn = NEXT_INSN (insn))
{
if (INSN_UID (insn) > max_uid) /* Find largest UID. */
CC_STATUS_INIT;
/* Output the insns. */
- for (insn = NEXT_INSN (first); insn;)
+ for (insn = first; insn;)
{
#ifdef HAVE_ATTR_length
if ((unsigned) INSN_UID (insn) >= INSN_ADDRESSES_SIZE ())
switch (GET_CODE (insn))
{
case NOTE:
- switch (NOTE_LINE_NUMBER (insn))
+ switch (NOTE_KIND (insn))
{
case NOTE_INSN_DELETED:
- case NOTE_INSN_LOOP_BEG:
- case NOTE_INSN_LOOP_END:
- case NOTE_INSN_FUNCTION_END:
- case NOTE_INSN_REPEATED_LINE_NUMBER:
- case NOTE_INSN_EXPECTED_VALUE:
break;
case NOTE_INSN_SWITCH_TEXT_SECTIONS:
-
- /* The presence of this note indicates that this basic block
- belongs in the "cold" section of the .o file. If we are
- not already writing to the cold section we need to change
- to it. */
-
- if (last_text_section == in_text)
- {
- (*debug_hooks->switch_text_section) ();
- unlikely_text_section ();
- }
- else
- {
- (*debug_hooks->switch_text_section) ();
- text_section ();
- }
+ in_cold_section_p = !in_cold_section_p;
+ (*debug_hooks->switch_text_section) ();
+ switch_to_section (current_function_section ());
break;
-
+
case NOTE_INSN_BASIC_BLOCK:
-
#ifdef TARGET_UNWIND_INFO
targetm.asm_out.unwind_emit (asm_out_file, insn);
#endif
if ((*seen & (SEEN_EMITTED | SEEN_BB)) == SEEN_BB)
{
*seen |= SEEN_EMITTED;
- last_filename = NULL;
+ force_source_line = true;
}
else
*seen |= SEEN_BB;
if ((*seen & (SEEN_EMITTED | SEEN_NOTE)) == SEEN_NOTE)
{
*seen |= SEEN_EMITTED;
- last_filename = NULL;
+ force_source_line = true;
}
else
*seen |= SEEN_NOTE;
if ((*seen & (SEEN_EMITTED | SEEN_NOTE)) == SEEN_NOTE)
{
*seen |= SEEN_EMITTED;
- last_filename = NULL;
+ force_source_line = true;
}
else
*seen |= SEEN_NOTE;
/* Mark this block as output. */
TREE_ASM_WRITTEN (NOTE_BLOCK (insn)) = 1;
}
+ if (write_symbols == DBX_DEBUG
+ || write_symbols == SDB_DEBUG)
+ {
+ location_t *locus_ptr
+ = block_nonartificial_location (NOTE_BLOCK (insn));
+
+ if (locus_ptr != NULL)
+ {
+ override_filename = LOCATION_FILE (*locus_ptr);
+ override_linenum = LOCATION_LINE (*locus_ptr);
+ }
+ }
break;
case NOTE_INSN_BLOCK_END:
(*debug_hooks->end_block) (high_block_linenum, n);
}
+ if (write_symbols == DBX_DEBUG
+ || write_symbols == SDB_DEBUG)
+ {
+ tree outer_block = BLOCK_SUPERCONTEXT (NOTE_BLOCK (insn));
+ location_t *locus_ptr
+ = block_nonartificial_location (outer_block);
+
+ if (locus_ptr != NULL)
+ {
+ override_filename = LOCATION_FILE (*locus_ptr);
+ override_linenum = LOCATION_LINE (*locus_ptr);
+ }
+ else
+ {
+ override_filename = NULL;
+ override_linenum = 0;
+ }
+ }
break;
case NOTE_INSN_DELETED_LABEL:
(*debug_hooks->var_location) (insn);
break;
- case 0:
- break;
-
default:
- gcc_assert (NOTE_LINE_NUMBER (insn) > 0);
+ gcc_unreachable ();
break;
}
break;
{
int log_align;
- targetm.asm_out.function_rodata_section (current_function_decl);
+ switch_to_section (targetm.asm_out.function_rodata_section
+ (current_function_decl));
#ifdef ADDR_VEC_ALIGN
log_align = ADDR_VEC_ALIGN (next);
ASM_OUTPUT_ALIGN (file, log_align);
}
else
- current_function_section (current_function_decl);
+ switch_to_section (current_function_section ());
#ifdef ASM_OUTPUT_CASE_LABEL
ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
int insn_code_number;
const char *template;
+#ifdef HAVE_conditional_execution
+ /* Reset this early so it is correct for ASM statements. */
+ current_insn_predicate = NULL_RTX;
+#endif
/* An INSN, JUMP_INSN or CALL_INSN.
First check for special kinds that recog doesn't recognize. */
#endif
if (! JUMP_TABLES_IN_TEXT_SECTION)
- targetm.asm_out.function_rodata_section (current_function_decl);
+ switch_to_section (targetm.asm_out.function_rodata_section
+ (current_function_decl));
else
- current_function_section (current_function_decl);
+ switch_to_section (current_function_section ());
if (app_on)
{
#endif
#endif
- current_function_section (current_function_decl);
+ switch_to_section (current_function_section ());
break;
}
if (string[0])
{
+ expanded_location loc;
+
if (! app_on)
{
fputs (ASM_APP_ON, file);
app_on = 1;
}
+#ifdef USE_MAPPED_LOCATION
+ loc = expand_location (ASM_INPUT_SOURCE_LOCATION (body));
+#else
+ loc.file = ASM_INPUT_SOURCE_FILE (body);
+ loc.line = ASM_INPUT_SOURCE_LINE (body);
+#endif
+ if (*loc.file && loc.line)
+ fprintf (asm_out_file, "%s %i \"%s\" 1\n",
+ ASM_COMMENT_START, loc.line, loc.file);
fprintf (asm_out_file, "\t%s\n", string);
+#if HAVE_AS_LINE_ZERO
+ if (*loc.file && loc.line)
+ fprintf (asm_out_file, "%s 0 \"\" 2\n", ASM_COMMENT_START);
+#endif
}
break;
}
unsigned int noperands = asm_noperands (body);
rtx *ops = alloca (noperands * sizeof (rtx));
const char *string;
+ location_t loc;
+ expanded_location expanded;
/* There's no telling what that did to the condition codes. */
CC_STATUS_INIT;
/* Get out the operand values. */
- string = decode_asm_operands (body, ops, NULL, NULL, NULL);
+ string = decode_asm_operands (body, ops, NULL, NULL, NULL, &loc);
/* Inhibit dieing on what would otherwise be compiler bugs. */
insn_noperands = noperands;
this_is_asm_operands = insn;
+ expanded = expand_location (loc);
#ifdef FINAL_PRESCAN_INSN
FINAL_PRESCAN_INSN (insn, ops, insn_noperands);
fputs (ASM_APP_ON, file);
app_on = 1;
}
+ if (expanded.file && expanded.line)
+ fprintf (asm_out_file, "%s %i \"%s\" 1\n",
+ ASM_COMMENT_START, expanded.line, expanded.file);
output_asm_insn (string, ops);
+#if HAVE_AS_LINE_ZERO
+ if (expanded.file && expanded.line)
+ fprintf (asm_out_file, "%s 0 \"\" 2\n", ASM_COMMENT_START);
+#endif
}
this_is_asm_operands = 0;
INSN_CODE (insn) = -1;
}
+ /* If this is a conditional trap, maybe modify it if the cc's
+ are in a nonstandard state so that it accomplishes the same
+ thing that it would do straightforwardly if the cc's were
+ set up normally. */
+ if (cc_status.flags != 0
+ && NONJUMP_INSN_P (insn)
+ && GET_CODE (body) == TRAP_IF
+ && COMPARISON_P (TRAP_CONDITION (body))
+ && XEXP (TRAP_CONDITION (body), 0) == cc0_rtx)
+ {
+ /* This function may alter the contents of its argument
+ and clear some of the cc_status.flags bits.
+ It may also return 1 meaning condition now always true
+ or -1 meaning condition now always false
+ or 2 meaning condition nontrivial but altered. */
+ int result = alter_cond (TRAP_CONDITION (body));
+
+ /* If TRAP_CONDITION has become always false, delete the
+ instruction. */
+ if (result == -1)
+ {
+ delete_insn (insn);
+ break;
+ }
+
+ /* If TRAP_CONDITION has become always true, replace
+ TRAP_CONDITION with const_true_rtx. */
+ if (result == 1)
+ TRAP_CONDITION (body) = const_true_rtx;
+
+ /* Rerecognize the instruction if it has changed. */
+ if (result != 0)
+ INSN_CODE (insn) = -1;
+ }
+
/* Make same adjustments to instructions that examine the
condition codes without jumping and instructions that
handle conditional moves (if this machine has either one). */
#ifdef HAVE_conditional_execution
if (GET_CODE (PATTERN (insn)) == COND_EXEC)
current_insn_predicate = COND_EXEC_TEST (PATTERN (insn));
- else
- current_insn_predicate = NULL_RTX;
#endif
#ifdef HAVE_cc0
return NEXT_INSN (insn);
}
\f
-/* Output debugging info to the assembler file FILE
- based on the NOTE-insn INSN, assumed to be a line number. */
+/* Return whether a source line note needs to be emitted before INSN. */
static bool
notice_source_line (rtx insn)
{
- const char *filename = insn_file (insn);
- int linenum = insn_line (insn);
+ const char *filename;
+ int linenum;
- if (filename && (filename != last_filename || last_linenum != linenum))
+ if (override_filename)
{
+ filename = override_filename;
+ linenum = override_linenum;
+ }
+ else
+ {
+ filename = insn_file (insn);
+ linenum = insn_line (insn);
+ }
+
+ if (filename
+ && (force_source_line
+ || filename != last_filename
+ || last_linenum != linenum))
+ {
+ force_source_line = false;
last_filename = filename;
last_linenum = linenum;
high_block_linenum = MAX (last_linenum, high_block_linenum);
cleanup_subreg_operands (rtx insn)
{
int i;
+ bool changed = false;
extract_insn_cached (insn);
for (i = 0; i < recog_data.n_operands; i++)
{
matches the else clause. Instead we test the underlying
expression directly. */
if (GET_CODE (*recog_data.operand_loc[i]) == SUBREG)
- recog_data.operand[i] = alter_subreg (recog_data.operand_loc[i]);
+ {
+ recog_data.operand[i] = alter_subreg (recog_data.operand_loc[i]);
+ changed = true;
+ }
else if (GET_CODE (recog_data.operand[i]) == PLUS
|| GET_CODE (recog_data.operand[i]) == MULT
|| MEM_P (recog_data.operand[i]))
- recog_data.operand[i] = walk_alter_subreg (recog_data.operand_loc[i]);
+ recog_data.operand[i] = walk_alter_subreg (recog_data.operand_loc[i], &changed);
}
for (i = 0; i < recog_data.n_dups; i++)
{
if (GET_CODE (*recog_data.dup_loc[i]) == SUBREG)
- *recog_data.dup_loc[i] = alter_subreg (recog_data.dup_loc[i]);
+ {
+ *recog_data.dup_loc[i] = alter_subreg (recog_data.dup_loc[i]);
+ changed = true;
+ }
else if (GET_CODE (*recog_data.dup_loc[i]) == PLUS
|| GET_CODE (*recog_data.dup_loc[i]) == MULT
|| MEM_P (*recog_data.dup_loc[i]))
- *recog_data.dup_loc[i] = walk_alter_subreg (recog_data.dup_loc[i]);
+ *recog_data.dup_loc[i] = walk_alter_subreg (recog_data.dup_loc[i], &changed);
}
+ if (changed)
+ df_insn_rescan (insn);
}
/* If X is a SUBREG, replace it with a REG or a MEM,
/* Do alter_subreg on all the SUBREGs contained in X. */
static rtx
-walk_alter_subreg (rtx *xp)
+walk_alter_subreg (rtx *xp, bool *changed)
{
rtx x = *xp;
switch (GET_CODE (x))
case PLUS:
case MULT:
case AND:
- XEXP (x, 0) = walk_alter_subreg (&XEXP (x, 0));
- XEXP (x, 1) = walk_alter_subreg (&XEXP (x, 1));
+ XEXP (x, 0) = walk_alter_subreg (&XEXP (x, 0), changed);
+ XEXP (x, 1) = walk_alter_subreg (&XEXP (x, 1), changed);
break;
case MEM:
case ZERO_EXTEND:
- XEXP (x, 0) = walk_alter_subreg (&XEXP (x, 0));
+ XEXP (x, 0) = walk_alter_subreg (&XEXP (x, 0), changed);
break;
case SUBREG:
+ *changed = true;
return alter_subreg (xp);
default:
In an `asm', it's the user's fault; otherwise, the compiler's fault. */
void
-output_operand_lossage (const char *msgid, ...)
+output_operand_lossage (const char *cmsgid, ...)
{
char *fmt_string;
char *new_message;
const char *pfx_str;
va_list ap;
- va_start (ap, msgid);
+ va_start (ap, cmsgid);
pfx_str = this_is_asm_operands ? _("invalid 'asm': ") : "output_operand: ";
- asprintf (&fmt_string, "%s%s", pfx_str, _(msgid));
+ asprintf (&fmt_string, "%s%s", pfx_str, _(cmsgid));
vasprintf (&new_message, fmt_string, ap);
if (this_is_asm_operands)
int letter = *p++;
unsigned long opnum;
char *endptr;
-
+
opnum = strtoul (p, &endptr, 10);
if (endptr == p)
{
unsigned long opnum;
char *endptr;
-
+
opnum = strtoul (p, &endptr, 10);
if (this_is_asm_operands && opnum >= insn_noperands)
output_operand_lossage ("operand number out of range");
x = XEXP (x, 0);
if (LABEL_P (x)
|| (NOTE_P (x)
- && NOTE_LINE_NUMBER (x) == NOTE_INSN_DELETED_LABEL))
+ && NOTE_KIND (x) == NOTE_INSN_DELETED_LABEL))
ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x));
else
output_operand_lossage ("'%%l' operand isn't a label");
void
output_address (rtx x)
{
- walk_alter_subreg (&x);
+ bool changed = false;
+ walk_alter_subreg (&x, &changed);
PRINT_OPERAND_ADDRESS (asm_out_file, x);
}
\f
break;
case SYMBOL_REF:
+ if (SYMBOL_REF_DECL (x))
+ mark_decl_referenced (SYMBOL_REF_DECL (x));
#ifdef ASM_OUTPUT_SYMBOL_REF
ASM_OUTPUT_SYMBOL_REF (file, x);
#else
output_operand_lossage ("floating constant misused");
break;
+ case CONST_FIXED:
+ fprintf (file, HOST_WIDE_INT_PRINT_HEX, CONST_FIXED_VALUE_LOW (x));
+ break;
+
case PLUS:
/* Some assemblers need integer constants to appear last (eg masm). */
if (GET_CODE (XEXP (x, 0)) == CONST_INT)
final_forward_branch_p (rtx insn)
{
int insn_id, label_id;
-
+
gcc_assert (uid_shuid);
insn_id = INSN_SHUID (insn);
label_id = INSN_SHUID (JUMP_LABEL (insn));
const char *const permitted_reg_in_leaf_functions = LEAF_REGISTERS;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if ((regs_ever_live[i] || global_regs[i])
+ if ((df_regs_ever_live_p (i) || global_regs[i])
&& ! permitted_reg_in_leaf_functions[i])
return 0;
}
newreg = LEAF_REG_REMAP (newreg);
gcc_assert (newreg >= 0);
- regs_ever_live[REGNO (in_rtx)] = 0;
- regs_ever_live[newreg] = 1;
- REGNO (in_rtx) = newreg;
+ df_set_regs_ever_live (REGNO (in_rtx), false);
+ df_set_regs_ever_live (newreg, true);
+ SET_REGNO (in_rtx, newreg);
in_rtx->used = 1;
}
for (i = 0; i < symbol_queue_index; ++i)
{
- /* If we pushed queued symbols then such symbols are must be
+ /* If we pushed queued symbols then such symbols must be
output no matter what anyone else says. Specifically,
we need to make sure dbxout_symbol() thinks the symbol was
used and also we need to override TYPE_DECL_SUPPRESS_DEBUG
symbol_queue_size = 0;
}
}
+\f
+/* Turn the RTL into assembly. */
+static unsigned int
+rest_of_handle_final (void)
+{
+ rtx x;
+ const char *fnname;
+
+ /* Get the function's name, as described by its RTL. This may be
+ different from the DECL_NAME name used in the source file. */
+
+ x = DECL_RTL (current_function_decl);
+ gcc_assert (MEM_P (x));
+ x = XEXP (x, 0);
+ gcc_assert (GET_CODE (x) == SYMBOL_REF);
+ fnname = XSTR (x, 0);
+
+ assemble_start_function (current_function_decl, fnname);
+ final_start_function (get_insns (), asm_out_file, optimize);
+ final (get_insns (), asm_out_file, optimize);
+ final_end_function ();
+
+#ifdef TARGET_UNWIND_INFO
+ /* ??? The IA-64 ".handlerdata" directive must be issued before
+ the ".endp" directive that closes the procedure descriptor. */
+ output_function_exception_table (fnname);
+#endif
+
+ assemble_end_function (current_function_decl, fnname);
+
+#ifndef TARGET_UNWIND_INFO
+ /* Otherwise, it feels unclean to switch sections in the middle. */
+ output_function_exception_table (fnname);
+#endif
+
+ user_defined_section_attribute = false;
+
+ /* Free up reg info memory. */
+ free_reg_info ();
+
+ if (! quiet_flag)
+ fflush (asm_out_file);
+
+ /* Write DBX symbols if requested. */
+
+ /* Note that for those inline functions where we don't initially
+ know for certain that we will be generating an out-of-line copy,
+ the first invocation of this routine (rest_of_compilation) will
+ skip over this code by doing a `goto exit_rest_of_compilation;'.
+ Later on, wrapup_global_declarations will (indirectly) call
+ rest_of_compilation again for those inline functions that need
+ to have out-of-line copies generated. During that call, we
+ *will* be routed past here. */
+
+ timevar_push (TV_SYMOUT);
+ (*debug_hooks->function_decl) (current_function_decl);
+ timevar_pop (TV_SYMOUT);
+ if (DECL_STATIC_CONSTRUCTOR (current_function_decl)
+ && targetm.have_ctors_dtors)
+ targetm.asm_out.constructor (XEXP (DECL_RTL (current_function_decl), 0),
+ decl_init_priority_lookup
+ (current_function_decl));
+ if (DECL_STATIC_DESTRUCTOR (current_function_decl)
+ && targetm.have_ctors_dtors)
+ targetm.asm_out.destructor (XEXP (DECL_RTL (current_function_decl), 0),
+ decl_fini_priority_lookup
+ (current_function_decl));
+ return 0;
+}
+
+struct tree_opt_pass pass_final =
+{
+ NULL, /* name */
+ NULL, /* gate */
+ rest_of_handle_final, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_FINAL, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_ggc_collect, /* todo_flags_finish */
+ 0 /* letter */
+};
+
+
+static unsigned int
+rest_of_handle_shorten_branches (void)
+{
+ /* Shorten branches. */
+ shorten_branches (get_insns ());
+ return 0;
+}
+
+struct tree_opt_pass pass_shorten_branches =
+{
+ "shorten", /* name */
+ NULL, /* gate */
+ rest_of_handle_shorten_branches, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_FINAL, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func, /* todo_flags_finish */
+ 0 /* letter */
+};
+
+
+static unsigned int
+rest_of_clean_state (void)
+{
+ rtx insn, next;
+
+ /* It is very important to decompose the RTL instruction chain here:
+ debug information keeps pointing into CODE_LABEL insns inside the function
+ body. If these remain pointing to the other insns, we end up preserving
+ whole RTL chain and attached detailed debug info in memory. */
+ for (insn = get_insns (); insn; insn = next)
+ {
+ next = NEXT_INSN (insn);
+ NEXT_INSN (insn) = NULL;
+ PREV_INSN (insn) = NULL;
+ }
+
+ /* In case the function was not output,
+ don't leave any temporary anonymous types
+ queued up for sdb output. */
+#ifdef SDB_DEBUGGING_INFO
+ if (write_symbols == SDB_DEBUG)
+ sdbout_types (NULL_TREE);
+#endif
+
+ reload_completed = 0;
+ epilogue_completed = 0;
+#ifdef STACK_REGS
+ regstack_completed = 0;
+#endif
+
+ /* Clear out the insn_length contents now that they are no
+ longer valid. */
+ init_insn_lengths ();
+
+ /* Show no temporary slots allocated. */
+ init_temp_slots ();
+
+ free_bb_for_insn ();
+
+ if (targetm.binds_local_p (current_function_decl))
+ {
+ int pref = cfun->preferred_stack_boundary;
+ if (cfun->stack_alignment_needed > cfun->preferred_stack_boundary)
+ pref = cfun->stack_alignment_needed;
+ cgraph_rtl_info (current_function_decl)->preferred_incoming_stack_boundary
+ = pref;
+ }
+
+ /* Make sure volatile mem refs aren't considered valid operands for
+ arithmetic insns. We must call this here if this is a nested inline
+ function, since the above code leaves us in the init_recog state,
+ and the function context push/pop code does not save/restore volatile_ok.
+
+ ??? Maybe it isn't necessary for expand_start_function to call this
+ anymore if we do it here? */
+
+ init_recog_no_volatile ();
+
+ /* We're done with this function. Free up memory if we can. */
+ free_after_parsing (cfun);
+ free_after_compilation (cfun);
+ return 0;
+}
+
+struct tree_opt_pass pass_clean_state =
+{
+ NULL, /* name */
+ NULL, /* gate */
+ rest_of_clean_state, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_FINAL, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ PROP_rtl, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ 0 /* letter */
+};
+
OSDN Git Service
