/* 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, 2006, 2007, 2008
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GCC.
/* Line number of last NOTE. */
static int last_linenum;
+/* Last discriminator written to assembly. */
+static int last_discriminator;
+
+/* Discriminator of current block. */
+static int discriminator;
+
/* Highest line number in current block. */
static int high_block_linenum;
int
label_to_alignment (rtx label)
{
- return LABEL_TO_ALIGNMENT (label);
+ if (CODE_LABEL_NUMBER (label) <= max_labelno)
+ return LABEL_TO_ALIGNMENT (label);
+ return 0;
+}
+
+int
+label_to_max_skip (rtx label)
+{
+ if (CODE_LABEL_NUMBER (label) <= max_labelno)
+ return LABEL_TO_MAX_SKIP (label);
+ return 0;
}
#ifdef HAVE_ATTR_length
/* Compute branch alignments based on frequency information in the
CFG. */
-static unsigned int
+unsigned int
compute_alignments (void)
{
int log, max_skip, max_log;
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)
+ if (! optimize || optimize_function_for_size_p (cfun))
return 0;
if (dump_file)
edge_iterator ei;
if (!LABEL_P (label)
- || probably_never_executed_bb_p (bb))
+ || optimize_bb_for_size_p (bb))
{
if (dump_file)
fprintf(dump_file, "BB %4i freq %4i loop %2i loop_depth %2i skipped.\n",
/* In case block is frequent and reached mostly by non-fallthru edge,
align it. It is most likely a first block of loop. */
if (has_fallthru
- && maybe_hot_bb_p (bb)
+ && optimize_bb_for_speed_p (bb)
&& branch_frequency + fallthru_frequency > freq_threshold
&& (branch_frequency
> fallthru_frequency * PARAM_VALUE (PARAM_ALIGN_LOOP_ITERATIONS)))
}
if (dump_file)
- loop_optimizer_finalize ();
+ {
+ loop_optimizer_finalize ();
+ free_dominance_info (CDI_DOMINATORS);
+ }
return 0;
}
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
- 0, /* tv_id */
+ TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
if (LABEL_P (insn))
{
rtx next;
+ bool next_is_jumptable;
/* Merge in alignments computed by compute_alignments. */
log = LABEL_TO_ALIGNMENT (insn);
max_skip = LABEL_TO_MAX_SKIP (insn);
}
- log = LABEL_ALIGN (insn);
- if (max_log < log)
+ next = next_nonnote_insn (insn);
+ next_is_jumptable = next && JUMP_TABLE_DATA_P (next);
+ if (!next_is_jumptable)
{
- max_log = log;
- max_skip = LABEL_ALIGN_MAX_SKIP;
+ log = LABEL_ALIGN (insn);
+ if (max_log < log)
+ {
+ max_log = log;
+ max_skip = LABEL_ALIGN_MAX_SKIP;
+ }
}
- 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
- || readonly_data_section == text_section)
- if (next && JUMP_P (next))
- {
- rtx nextbody = PATTERN (next);
- if (GET_CODE (nextbody) == ADDR_VEC
- || GET_CODE (nextbody) == ADDR_DIFF_VEC)
- {
- log = ADDR_VEC_ALIGN (next);
- if (max_log < log)
- {
- max_log = log;
- max_skip = LABEL_ALIGN_MAX_SKIP;
- }
- }
- }
+ if ((JUMP_TABLES_IN_TEXT_SECTION
+ || readonly_data_section == text_section)
+ && next_is_jumptable)
+ {
+ log = ADDR_VEC_ALIGN (next);
+ if (max_log < log)
+ {
+ max_log = log;
+ max_skip = LABEL_ALIGN_MAX_SKIP;
+ }
+ }
LABEL_TO_ALIGNMENT (insn) = max_log;
LABEL_TO_MAX_SKIP (insn) = max_skip;
max_log = 0;
last_filename = locator_file (prologue_locator);
last_linenum = locator_line (prologue_locator);
+ last_discriminator = discriminator = 0;
high_block_linenum = high_function_linenum = last_linenum;
}
}
+/* Given a CALL_INSN, find and return the nested CALL. */
+static rtx
+call_from_call_insn (rtx insn)
+{
+ rtx x;
+ gcc_assert (CALL_P (insn));
+ x = PATTERN (insn);
+
+ while (GET_CODE (x) != CALL)
+ {
+ switch (GET_CODE (x))
+ {
+ default:
+ gcc_unreachable ();
+ case COND_EXEC:
+ x = COND_EXEC_CODE (x);
+ break;
+ case PARALLEL:
+ x = XVECEXP (x, 0, 0);
+ break;
+ case SET:
+ x = XEXP (x, 1);
+ break;
+ }
+ }
+ return x;
+}
+
/* The final scan for one insn, INSN.
Args are same as in `final', except that INSN
is the insn being scanned.
else
*seen |= SEEN_BB;
+ discriminator = NOTE_BASIC_BLOCK (insn)->discriminator;
+
break;
case NOTE_INSN_EH_REGION_BEG:
break;
case NOTE_INSN_EPILOGUE_BEG:
+#if defined (DWARF2_UNWIND_INFO) && defined (HAVE_epilogue)
+ if (dwarf2out_do_frame ())
+ dwarf2out_begin_epilogue (insn);
+#endif
targetm.asm_out.function_begin_epilogue (file);
break;
+ case NOTE_INSN_CFA_RESTORE_STATE:
+#if defined (DWARF2_UNWIND_INFO)
+ dwarf2out_frame_debug_restore_state ();
+#endif
+ break;
+
case NOTE_INSN_FUNCTION_BEG:
app_disable ();
(*debug_hooks->end_prologue) (last_linenum, last_filename);
if (LABEL_NAME (insn))
(*debug_hooks->label) (insn);
- if (app_on)
- {
- fputs (ASM_APP_OFF, file);
- app_on = 0;
- }
+ app_disable ();
next = next_nonnote_insn (insn);
- if (next != 0 && JUMP_P (next))
+ /* If this label is followed by a jump-table, make sure we put
+ the label in the read-only section. Also possibly write the
+ label and jump table together. */
+ if (next != 0 && JUMP_TABLE_DATA_P (next))
{
- 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
- possibly write the label and jump table together. */
-
- if (GET_CODE (nextbody) == ADDR_VEC
- || GET_CODE (nextbody) == ADDR_DIFF_VEC)
- {
#if defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC)
- /* In this case, the case vector is being moved by the
- target, so don't output the label at all. Leave that
- to the back end macros. */
+ /* In this case, the case vector is being moved by the
+ target, so don't output the label at all. Leave that
+ to the back end macros. */
#else
- if (! JUMP_TABLES_IN_TEXT_SECTION)
- {
- int log_align;
+ if (! JUMP_TABLES_IN_TEXT_SECTION)
+ {
+ int log_align;
- switch_to_section (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);
+ log_align = ADDR_VEC_ALIGN (next);
#else
- log_align = exact_log2 (BIGGEST_ALIGNMENT / BITS_PER_UNIT);
+ log_align = exact_log2 (BIGGEST_ALIGNMENT / BITS_PER_UNIT);
#endif
- ASM_OUTPUT_ALIGN (file, log_align);
- }
- else
- switch_to_section (current_function_section ());
+ ASM_OUTPUT_ALIGN (file, log_align);
+ }
+ else
+ switch_to_section (current_function_section ());
#ifdef ASM_OUTPUT_CASE_LABEL
- ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
- next);
+ ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
+ next);
#else
- targetm.asm_out.internal_label (file, "L", CODE_LABEL_NUMBER (insn));
+ targetm.asm_out.internal_label (file, "L", CODE_LABEL_NUMBER (insn));
#endif
#endif
- break;
- }
+ break;
}
if (LABEL_ALT_ENTRY_P (insn))
output_alternate_entry_point (file, insn);
else
switch_to_section (current_function_section ());
- if (app_on)
- {
- fputs (ASM_APP_OFF, file);
- app_on = 0;
- }
+ app_disable ();
#if defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC)
if (GET_CODE (body) == ADDR_VEC)
note in a row. */
if (notice_source_line (insn))
{
- (*debug_hooks->source_line) (last_linenum, last_filename);
+ (*debug_hooks->source_line) (last_linenum,
+ last_filename,
+ last_discriminator);
}
if (GET_CODE (body) == ASM_INPUT)
{
expanded_location loc;
- if (! app_on)
- {
- fputs (ASM_APP_ON, file);
- app_on = 1;
- }
+ app_enable ();
loc = expand_location (ASM_INPUT_SOURCE_LOCATION (body));
if (*loc.file && loc.line)
fprintf (asm_out_file, "%s %i \"%s\" 1\n",
/* Output the insn using them. */
if (string[0])
{
- if (! app_on)
- {
- fputs (ASM_APP_ON, file);
- app_on = 1;
- }
+ app_enable ();
if (expanded.file && expanded.line)
fprintf (asm_out_file, "%s %i \"%s\" 1\n",
ASM_COMMENT_START, expanded.line, expanded.file);
#endif
}
+ if (targetm.asm_out.final_postscan_insn)
+ targetm.asm_out.final_postscan_insn (file, insn, ops,
+ insn_noperands);
+
this_is_asm_operands = 0;
break;
}
- if (app_on)
- {
- fputs (ASM_APP_OFF, file);
- app_on = 0;
- }
+ app_disable ();
if (GET_CODE (body) == SEQUENCE)
{
&& GET_CODE (SET_DEST (set)) == CC0
&& insn != last_ignored_compare)
{
+ rtx src1, src2;
if (GET_CODE (SET_SRC (set)) == SUBREG)
SET_SRC (set) = alter_subreg (&SET_SRC (set));
- else if (GET_CODE (SET_SRC (set)) == COMPARE)
+
+ src1 = SET_SRC (set);
+ src2 = NULL_RTX;
+ if (GET_CODE (SET_SRC (set)) == COMPARE)
{
if (GET_CODE (XEXP (SET_SRC (set), 0)) == SUBREG)
XEXP (SET_SRC (set), 0)
if (GET_CODE (XEXP (SET_SRC (set), 1)) == SUBREG)
XEXP (SET_SRC (set), 1)
= alter_subreg (&XEXP (SET_SRC (set), 1));
+ if (XEXP (SET_SRC (set), 1)
+ == CONST0_RTX (GET_MODE (XEXP (SET_SRC (set), 0))))
+ src2 = XEXP (SET_SRC (set), 0);
}
if ((cc_status.value1 != 0
- && rtx_equal_p (SET_SRC (set), cc_status.value1))
+ && rtx_equal_p (src1, cc_status.value1))
|| (cc_status.value2 != 0
- && rtx_equal_p (SET_SRC (set), cc_status.value2)))
+ && rtx_equal_p (src1, cc_status.value2))
+ || (src2 != 0 && cc_status.value1 != 0
+ && rtx_equal_p (src2, cc_status.value1))
+ || (src2 != 0 && cc_status.value2 != 0
+ && rtx_equal_p (src2, cc_status.value2)))
{
/* Don't delete insn if it has an addressing side-effect. */
if (! FIND_REG_INC_NOTE (insn, NULL_RTX)
}
}
}
-#endif
-#ifdef HAVE_cc0
/* If this is a conditional branch, maybe modify it
if the cc's are in a nonstandard state
so that it accomplishes the same thing that it would
targetm.asm_out.unwind_emit (asm_out_file, insn);
#endif
+ if (CALL_P (insn))
+ {
+ rtx x = call_from_call_insn (insn);
+ x = XEXP (x, 0);
+ if (x && MEM_P (x) && GET_CODE (XEXP (x, 0)) == SYMBOL_REF)
+ {
+ tree t;
+ x = XEXP (x, 0);
+ t = SYMBOL_REF_DECL (x);
+ if (t)
+ assemble_external (t);
+ }
+ }
+
/* Output assembler code from the template. */
output_asm_insn (templ, recog_data.operand);
+ /* Some target machines need to postscan each insn after
+ it is output. */
+ if (targetm.asm_out.final_postscan_insn)
+ targetm.asm_out.final_postscan_insn (file, insn, recog_data.operand,
+ recog_data.n_operands);
+
/* If necessary, report the effect that the instruction has on
the unwind info. We've already done this for delay slots
and call instructions. */
if (filename
&& (force_source_line
|| filename != last_filename
- || last_linenum != linenum))
+ || last_linenum != linenum
+ || last_discriminator != discriminator))
{
force_source_line = false;
last_filename = filename;
last_linenum = linenum;
+ last_discriminator = discriminator;
high_block_linenum = MAX (last_linenum, high_block_linenum);
high_function_linenum = MAX (last_linenum, high_function_linenum);
return true;
assemble_name (asm_out_file, buf);
}
+/* Helper rtx-iteration-function for mark_symbol_refs_as_used and
+ output_operand. Marks SYMBOL_REFs as referenced through use of
+ assemble_external. */
+
+static int
+mark_symbol_ref_as_used (rtx *xp, void *dummy ATTRIBUTE_UNUSED)
+{
+ rtx x = *xp;
+
+ /* If we have a used symbol, we may have to emit assembly
+ annotations corresponding to whether the symbol is external, weak
+ or has non-default visibility. */
+ if (GET_CODE (x) == SYMBOL_REF)
+ {
+ tree t;
+
+ t = SYMBOL_REF_DECL (x);
+ if (t)
+ assemble_external (t);
+
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Marks SYMBOL_REFs in x as referenced through use of assemble_external. */
+
+void
+mark_symbol_refs_as_used (rtx x)
+{
+ for_each_rtx (&x, mark_symbol_ref_as_used, NULL);
+}
+
/* Print operand X using machine-dependent assembler syntax.
The macro PRINT_OPERAND is defined just to control this function.
CODE is a non-digit that preceded the operand-number in the % spec,
gcc_assert (!x || !REG_P (x) || REGNO (x) < FIRST_PSEUDO_REGISTER);
PRINT_OPERAND (asm_out_file, x, code);
+
+ if (x == NULL_RTX)
+ return;
+
+ for_each_rtx (&x, mark_symbol_ref_as_used, NULL);
}
/* Print a memory reference operand for address X
case SYMBOL_REF:
if (SYMBOL_REF_DECL (x))
- mark_decl_referenced (SYMBOL_REF_DECL (x));
+ {
+ mark_decl_referenced (SYMBOL_REF_DECL (x));
+ assemble_external (SYMBOL_REF_DECL (x));
+ }
#ifdef ASM_OUTPUT_SYMBOL_REF
ASM_OUTPUT_SYMBOL_REF (file, x);
#else
timevar_push (TV_SYMOUT);
(*debug_hooks->function_decl) (current_function_decl);
timevar_pop (TV_SYMOUT);
+
+ /* Release the blocks that are linked to DECL_INITIAL() to free the memory. */
+ DECL_INITIAL (current_function_decl) = error_mark_node;
+
if (DECL_STATIC_CONSTRUCTOR (current_function_decl)
&& targetm.have_ctors_dtors)
targetm.asm_out.constructor (XEXP (DECL_RTL (current_function_decl), 0),
sdbout_types (NULL_TREE);
#endif
+ flag_rerun_cse_after_global_opts = 0;
reload_completed = 0;
epilogue_completed = 0;
#ifdef STACK_REGS
0 /* todo_flags_finish */
}
};
-
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