/* 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 Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
This file is part of GCC.
rtx label = BB_HEAD (bb);
int fallthru_frequency = 0, branch_frequency = 0, has_fallthru = 0;
edge e;
+ edge_iterator ei;
if (!LABEL_P (label)
|| probably_never_executed_bb_p (bb))
max_log = LABEL_ALIGN (label);
max_skip = LABEL_ALIGN_MAX_SKIP;
- for (e = bb->pred; e; e = e->pred_next)
+ FOR_EACH_EDGE (e, ei, bb->preds)
{
if (e->flags & EDGE_FALLTHRU)
has_fallthru = 1, fallthru_frequency += EDGE_FREQUENCY (e);
/* Compute maximum UID and allocate label_align / uid_shuid. */
max_uid = get_max_uid ();
- /* Free uid_shuid before reallocating it. */
+ /* Free uid_shuid before reallocating it. */
free (uid_shuid);
uid_shuid = xmalloc (max_uid * sizeof *uid_shuid);
max_log = log;
max_skip = LABEL_ALIGN_MAX_SKIP;
}
- next = NEXT_INSN (insn);
+ 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)
XEXP (pat, 3) = gen_rtx_LABEL_REF (VOIDmode, max_lab);
insn_shuid = INSN_SHUID (insn);
rel = INSN_SHUID (XEXP (XEXP (pat, 0), 0));
+ memset (&flags, 0, sizeof (flags));
flags.min_align = min_align;
flags.base_after_vec = rel > insn_shuid;
flags.min_after_vec = min > insn_shuid;
#if defined (DWARF2_UNWIND_INFO) && defined (HAVE_prologue)
if (dwarf2out_do_frame ())
- dwarf2out_frame_debug (NULL_RTX);
+ dwarf2out_frame_debug (NULL_RTX, false);
#endif
/* If debugging, assign block numbers to all of the blocks in this
assemble_integer (const0_rtx, LONG_TYPE_SIZE / BITS_PER_UNIT, align, 1);
}
- function_section (current_function_decl);
+ current_function_section (current_function_decl);
#if defined(ASM_OUTPUT_REG_PUSH)
if (sval && svrtx != NULL_RTX && REG_P (svrtx))
}
\f
/* Output assembler code for some insns: all or part of a function.
- For description of args, see `final_start_function', above.
-
- PRESCAN is 1 if we are not really outputting,
- just scanning as if we were outputting.
- Prescanning deletes and rearranges insns just like ordinary output.
- PRESCAN is -2 if we are outputting after having prescanned.
- In this case, don't try to delete or rearrange insns
- because that has already been done.
- Prescanning is done only on certain machines. */
+ For description of args, see `final_start_function', above. */
void
-final (rtx first, FILE *file, int optimize, int prescan)
+final (rtx first, FILE *file, int optimize)
{
rtx insn;
int max_uid = 0;
insn_current_address = INSN_ADDRESSES (INSN_UID (insn));
#endif /* HAVE_ATTR_length */
- insn = final_scan_insn (insn, file, optimize, prescan, 0, &seen);
+ insn = final_scan_insn (insn, file, optimize, 0, &seen);
}
}
\f
}
}
-/* Return boolean indicating if there is a NOTE_INSN_UNLIKELY_EXECUTED_CODE
- note in the instruction chain (going forward) between the current
- instruction, and the next 'executable' instruction. */
-
-bool
-scan_ahead_for_unlikely_executed_note (rtx insn)
-{
- rtx temp;
- int bb_note_count = 0;
-
- for (temp = insn; temp; temp = NEXT_INSN (temp))
- {
- if (NOTE_P (temp)
- && NOTE_LINE_NUMBER (temp) == NOTE_INSN_UNLIKELY_EXECUTED_CODE)
- return true;
- if (NOTE_P (temp)
- && NOTE_LINE_NUMBER (temp) == NOTE_INSN_BASIC_BLOCK)
- {
- bb_note_count++;
- if (bb_note_count > 1)
- return false;
- }
- if (INSN_P (temp))
- return false;
- }
-
- return false;
-}
-
/* The final scan for one insn, INSN.
Args are same as in `final', except that INSN
is the insn being scanned.
rtx
final_scan_insn (rtx insn, FILE *file, int optimize ATTRIBUTE_UNUSED,
- int prescan, int nopeepholes ATTRIBUTE_UNUSED,
- int *seen)
+ int nopeepholes ATTRIBUTE_UNUSED, int *seen)
{
#ifdef HAVE_cc0
rtx set;
#endif
+ rtx next;
insn_counter++;
switch (GET_CODE (insn))
{
case NOTE:
- if (prescan > 0)
- break;
-
switch (NOTE_LINE_NUMBER (insn))
{
case NOTE_INSN_DELETED:
case NOTE_INSN_EXPECTED_VALUE:
break;
- case NOTE_INSN_UNLIKELY_EXECUTED_CODE:
+ 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. */
-
- unlikely_text_section ();
+
+ if (last_text_section == in_text)
+ {
+ (*debug_hooks->switch_text_section) ();
+ unlikely_text_section ();
+ }
+ else
+ {
+ (*debug_hooks->switch_text_section) ();
+ text_section ();
+ }
break;
case NOTE_INSN_BASIC_BLOCK:
- /* If we are performing the optimization that partitions
- basic blocks into hot & cold sections of the .o file,
- then at the start of each new basic block, before
- beginning to write code for the basic block, we need to
- check to see whether the basic block belongs in the hot
- or cold section of the .o file, and change the section we
- are writing to appropriately. */
-
- if (flag_reorder_blocks_and_partition
- && !scan_ahead_for_unlikely_executed_note (insn))
- function_section (current_function_decl);
-
#ifdef TARGET_UNWIND_INFO
targetm.asm_out.unwind_emit (asm_out_file, insn);
#endif
case BARRIER:
#if defined (DWARF2_UNWIND_INFO)
if (dwarf2out_do_frame ())
- dwarf2out_frame_debug (insn);
+ dwarf2out_frame_debug (insn, false);
#endif
break;
}
}
#endif
- if (prescan > 0)
- break;
if (LABEL_NAME (insn))
(*debug_hooks->label) (insn);
- /* If we are doing the optimization that partitions hot & cold
- basic blocks into separate sections of the .o file, we need
- to ensure the jump table ends up in the correct section... */
-
- if (flag_reorder_blocks_and_partition
- && targetm.have_named_sections)
- {
- rtx tmp_table, tmp_label;
- if (LABEL_P (insn)
- && tablejump_p (NEXT_INSN (insn), &tmp_label, &tmp_table))
- {
- /* Do nothing; Do NOT change the current section. */
- }
- else if (scan_ahead_for_unlikely_executed_note (insn))
- unlikely_text_section ();
- else if (in_unlikely_text_section ())
- function_section (current_function_decl);
- }
-
if (app_on)
{
fputs (ASM_APP_OFF, file);
app_on = 0;
}
- if (NEXT_INSN (insn) != 0
- && JUMP_P (NEXT_INSN (insn)))
+
+ next = next_nonnote_insn (insn);
+ if (next != 0 && JUMP_P (next))
{
- rtx nextbody = PATTERN (NEXT_INSN (insn));
+ rtx nextbody = PATTERN (next);
/* If this label is followed by a jump-table,
make sure we put the label in the read-only section. Also
targetm.asm_out.function_rodata_section (current_function_decl);
#ifdef ADDR_VEC_ALIGN
- log_align = ADDR_VEC_ALIGN (NEXT_INSN (insn));
+ log_align = ADDR_VEC_ALIGN (next);
#else
log_align = exact_log2 (BIGGEST_ALIGNMENT / BITS_PER_UNIT);
#endif
ASM_OUTPUT_ALIGN (file, log_align);
}
else
- function_section (current_function_decl);
+ current_function_section (current_function_decl);
#ifdef ASM_OUTPUT_CASE_LABEL
ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
- NEXT_INSN (insn));
+ next);
#else
targetm.asm_out.internal_label (file, "L", CODE_LABEL_NUMBER (insn));
#endif
int vlen, idx;
#endif
- if (prescan > 0)
- break;
+ if (! JUMP_TABLES_IN_TEXT_SECTION)
+ targetm.asm_out.function_rodata_section (current_function_decl);
+ else
+ current_function_section (current_function_decl);
if (app_on)
{
#endif
#endif
- function_section (current_function_decl);
+ current_function_section (current_function_decl);
break;
}
/* There's no telling what that did to the condition codes. */
CC_STATUS_INIT;
- if (prescan > 0)
- break;
if (string[0])
{
/* There's no telling what that did to the condition codes. */
CC_STATUS_INIT;
- if (prescan > 0)
- break;
/* Get out the operand values. */
string = decode_asm_operands (body, ops, NULL, NULL, NULL);
break;
}
- if (prescan <= 0 && app_on)
+ if (app_on)
{
fputs (ASM_APP_OFF, file);
app_on = 0;
{
/* A delayed-branch sequence */
int i;
- rtx next;
- if (prescan > 0)
- break;
final_sequence = body;
/* Record the delay slots' frame information before the branch.
#if defined (DWARF2_UNWIND_INFO)
if (dwarf2out_do_frame ())
for (i = 1; i < XVECLEN (body, 0); i++)
- dwarf2out_frame_debug (XVECEXP (body, 0, i));
+ dwarf2out_frame_debug (XVECEXP (body, 0, i), false);
#endif
/* The first insn in this SEQUENCE might be a JUMP_INSN that will
thought unnecessary. If that happens, cancel this sequence
and cause that insn to be restored. */
- next = final_scan_insn (XVECEXP (body, 0, 0), file, 0, prescan, 1, seen);
+ next = final_scan_insn (XVECEXP (body, 0, 0), file, 0, 1, seen);
if (next != XVECEXP (body, 0, 1))
{
final_sequence = 0;
/* We loop in case any instruction in a delay slot gets
split. */
do
- insn = final_scan_insn (insn, file, 0, prescan, 1, seen);
+ insn = final_scan_insn (insn, file, 0, 1, seen);
while (insn != next);
}
#ifdef DBR_OUTPUT_SEQEND
}
#endif
-#ifndef STACK_REGS
- /* Don't bother outputting obvious no-ops, even without -O.
- This optimization is fast and doesn't interfere with debugging.
- Don't do this if the insn is in a delay slot, since this
- will cause an improper number of delay insns to be written. */
- if (final_sequence == 0
- && prescan >= 0
- && NONJUMP_INSN_P (insn) && GET_CODE (body) == SET
- && REG_P (SET_SRC (body))
- && REG_P (SET_DEST (body))
- && REGNO (SET_SRC (body)) == REGNO (SET_DEST (body)))
- break;
-#endif
-
#ifdef HAVE_cc0
/* If this is a conditional branch, maybe modify it
if the cc's are in a nonstandard state
&& SET_DEST (body) == pc_rtx
&& GET_CODE (SET_SRC (body)) == IF_THEN_ELSE
&& COMPARISON_P (XEXP (SET_SRC (body), 0))
- && XEXP (XEXP (SET_SRC (body), 0), 0) == cc0_rtx
- /* This is done during prescan; it is not done again
- in final scan when prescan has been done. */
- && prescan >= 0)
+ && XEXP (XEXP (SET_SRC (body), 0), 0) == cc0_rtx)
{
/* This function may alter the contents of its argument
and clear some of the cc_status.flags bits.
for (note = NEXT_INSN (insn); note != next;
note = NEXT_INSN (note))
- final_scan_insn (note, file, optimize, prescan, nopeepholes, seen);
+ final_scan_insn (note, file, optimize, nopeepholes, seen);
- /* In case this is prescan, put the notes
- in proper position for later rescan. */
+ /* Put the notes in the proper position for a later
+ rescan. For example, the SH target can do this
+ when generating a far jump in a delayed branch
+ sequence. */
note = NEXT_INSN (insn);
PREV_INSN (note) = prev;
NEXT_INSN (prev) = note;
#if defined (DWARF2_UNWIND_INFO)
if (CALL_P (insn) && dwarf2out_do_frame ())
- dwarf2out_frame_debug (insn);
+ dwarf2out_frame_debug (insn, false);
#endif
/* Find the proper template for this insn. */
return new;
}
- if (prescan > 0)
- break;
-
#ifdef TARGET_UNWIND_INFO
/* ??? This will put the directives in the wrong place if
get_insn_template outputs assembly directly. However calling it
the unwind info. We've already done this for delay slots
and call instructions. */
#if defined (DWARF2_UNWIND_INFO)
- if (NONJUMP_INSN_P (insn)
+ if (final_sequence == 0
#if !defined (HAVE_prologue)
&& !ACCUMULATE_OUTGOING_ARGS
#endif
- && final_sequence == 0
&& dwarf2out_do_frame ())
- dwarf2out_frame_debug (insn);
+ dwarf2out_frame_debug (insn, true);
#endif
current_output_insn = debug_insn = 0;
/* simplify_subreg does not remove subreg from volatile references.
We are required to. */
if (MEM_P (y))
- *xp = adjust_address (y, GET_MODE (x), SUBREG_BYTE (x));
+ {
+ int offset = SUBREG_BYTE (x);
+
+ /* For paradoxical subregs on big-endian machines, SUBREG_BYTE
+ contains 0 instead of the proper offset. See simplify_subreg. */
+ if (offset == 0
+ && GET_MODE_SIZE (GET_MODE (y)) < GET_MODE_SIZE (GET_MODE (x)))
+ {
+ int difference = GET_MODE_SIZE (GET_MODE (y))
+ - GET_MODE_SIZE (GET_MODE (x));
+ if (WORDS_BIG_ENDIAN)
+ offset += (difference / UNITS_PER_WORD) * UNITS_PER_WORD;
+ if (BYTES_BIG_ENDIAN)
+ offset += difference % UNITS_PER_WORD;
+ }
+
+ *xp = adjust_address (y, GET_MODE (x), offset);
+ }
else
{
rtx new = simplify_subreg (GET_MODE (x), y, GET_MODE (y),
if (new != 0)
*xp = new;
- else
+ else if (REG_P (y))
{
/* Simplify_subreg can't handle some REG cases, but we have to. */
- unsigned int regno = subreg_hard_regno (x, 1);
-
- gcc_assert (REG_P (y));
+ unsigned int regno = subreg_regno (x);
*xp = gen_rtx_REG_offset (y, GET_MODE (x), regno, SUBREG_BYTE (x));
}
}
va_start (ap, msgid);
- pfx_str = this_is_asm_operands ? _("invalid `asm': ") : "output_operand: ";
+ pfx_str = this_is_asm_operands ? _("invalid 'asm': ") : "output_operand: ";
asprintf (&fmt_string, "%s%s", pfx_str, _(msgid));
vasprintf (&new_message, fmt_string, ap);
else if (ISALPHA (*p))
{
int letter = *p++;
- c = atoi (p);
-
- if (! ISDIGIT (*p))
- output_operand_lossage ("operand number missing after %%-letter");
- else if (this_is_asm_operands
- && (c < 0 || (unsigned int) c >= insn_noperands))
+ unsigned long opnum;
+ char *endptr;
+
+ opnum = strtoul (p, &endptr, 10);
+
+ if (endptr == p)
+ output_operand_lossage ("operand number missing "
+ "after %%-letter");
+ else if (this_is_asm_operands && opnum >= insn_noperands)
output_operand_lossage ("operand number out of range");
else if (letter == 'l')
- output_asm_label (operands[c]);
+ output_asm_label (operands[opnum]);
else if (letter == 'a')
- output_address (operands[c]);
+ output_address (operands[opnum]);
else if (letter == 'c')
{
- if (CONSTANT_ADDRESS_P (operands[c]))
- output_addr_const (asm_out_file, operands[c]);
+ if (CONSTANT_ADDRESS_P (operands[opnum]))
+ output_addr_const (asm_out_file, operands[opnum]);
else
- output_operand (operands[c], 'c');
+ output_operand (operands[opnum], 'c');
}
else if (letter == 'n')
{
- if (GET_CODE (operands[c]) == CONST_INT)
+ if (GET_CODE (operands[opnum]) == CONST_INT)
fprintf (asm_out_file, HOST_WIDE_INT_PRINT_DEC,
- - INTVAL (operands[c]));
+ - INTVAL (operands[opnum]));
else
{
putc ('-', asm_out_file);
- output_addr_const (asm_out_file, operands[c]);
+ output_addr_const (asm_out_file, operands[opnum]);
}
}
else
- output_operand (operands[c], letter);
+ output_operand (operands[opnum], letter);
- if (!opoutput[c])
- oporder[ops++] = c;
- opoutput[c] = 1;
+ if (!opoutput[opnum])
+ oporder[ops++] = opnum;
+ opoutput[opnum] = 1;
- while (ISDIGIT (c = *p))
- p++;
+ p = endptr;
+ c = *p;
}
/* % followed by a digit outputs an operand the default way. */
else if (ISDIGIT (*p))
{
- c = atoi (p);
- if (this_is_asm_operands
- && (c < 0 || (unsigned int) c >= insn_noperands))
+ 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");
else
- output_operand (operands[c], 0);
+ output_operand (operands[opnum], 0);
- if (!opoutput[c])
- oporder[ops++] = c;
- opoutput[c] = 1;
+ if (!opoutput[opnum])
+ oporder[ops++] = opnum;
+ opoutput[opnum] = 1;
- while (ISDIGIT (c = *p))
- p++;
+ p = endptr;
+ c = *p;
}
/* % followed by punctuation: output something for that
punctuation character alone, with no operand.
&& NOTE_LINE_NUMBER (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");
+ output_operand_lossage ("'%%l' operand isn't a label");
assemble_name (asm_out_file, buf);
}
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
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