FUNCTION_EPILOGUE. Those instructions never exist as rtl. */
#include "config.h"
-#ifdef __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
#include "system.h"
#include "tree.h"
#include "output.h"
#include "except.h"
#include "toplev.h"
+#include "reload.h"
/* Get N_SLINE and N_SOL from stab.h if we can expect the file to exist. */
#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
-#if defined (USG) || defined (NO_STAB_H)
+#include "dbxout.h"
+#if defined (USG) || !defined (HAVE_STAB_H)
#include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */
#else
-#include <stab.h> /* On BSD, use the system's stab.h. */
-#endif /* not USG */
+#include <stab.h>
+#endif
+
#endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h"
#endif
+#ifdef DWARF_DEBUGGING_INFO
+#include "dwarfout.h"
+#endif
+
+#if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
+#include "dwarf2out.h"
+#endif
+
+#ifdef SDB_DEBUGGING_INFO
+#include "sdbout.h"
+#endif
+
/* .stabd code for line number. */
#ifndef N_SLINE
#define N_SLINE 0x44
#define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == ';')
#endif
+#ifndef JUMP_TABLES_IN_TEXT_SECTION
+#define JUMP_TABLES_IN_TEXT_SECTION 0
+#endif
+
/* Nonzero means this function is a leaf function, with no function calls.
This variable exists to be examined in FUNCTION_PROLOGUE
and FUNCTION_EPILOGUE. Always zero, unless set by some action. */
for each insn we'll call the alignment chain of this insn in the following
comments. */
-rtx *uid_align;
-int *uid_shuid;
-short *label_align;
+struct label_alignment {
+ short alignment;
+ short max_skip;
+};
+
+static rtx *uid_align;
+static int *uid_shuid;
+static struct label_alignment *label_align;
/* Indicate that branch shortening hasn't yet been done. */
#define LABEL_ALIGN(LABEL) 0
#endif
+#ifndef LABEL_ALIGN_MAX_SKIP
+#define LABEL_ALIGN_MAX_SKIP 0
+#endif
+
#ifndef LOOP_ALIGN
#define LOOP_ALIGN(LABEL) 0
#endif
+#ifndef LOOP_ALIGN_MAX_SKIP
+#define LOOP_ALIGN_MAX_SKIP 0
+#endif
+
#ifndef LABEL_ALIGN_AFTER_BARRIER
#define LABEL_ALIGN_AFTER_BARRIER(LABEL) 0
#endif
+#ifndef LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP
+#define LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP 0
+#endif
+
#ifndef ADDR_VEC_ALIGN
int
final_addr_vec_align (addr_vec)
static int min_labelno, max_labelno;
#define LABEL_TO_ALIGNMENT(LABEL) \
- (label_align[CODE_LABEL_NUMBER (LABEL) - min_labelno])
+ (label_align[CODE_LABEL_NUMBER (LABEL) - min_labelno].alignment)
+
+#define LABEL_TO_MAX_SKIP(LABEL) \
+ (label_align[CODE_LABEL_NUMBER (LABEL) - min_labelno].max_skip)
/* For the benefit of port specific code do this also as a function. */
int
int max_uid;
int i;
int max_log;
+ int max_skip;
#ifdef HAVE_ATTR_length
#define MAX_CODE_ALIGN 16
rtx seq;
max_labelno = max_label_num ();
min_labelno = get_first_label_num ();
- label_align
- = (short*) xmalloc ((max_labelno - min_labelno + 1) * sizeof (short));
- bzero (label_align, (max_labelno - min_labelno + 1) * sizeof (short));
+ label_align = (struct label_alignment *) xmalloc (
+ (max_labelno - min_labelno + 1) * sizeof (struct label_alignment));
+ bzero ((char *) label_align,
+ (max_labelno - min_labelno + 1) * sizeof (struct label_alignment));
uid_shuid = (int *) xmalloc (max_uid * sizeof *uid_shuid);
impose on the next CODE_LABEL (or the current one if we are processing
the CODE_LABEL itself). */
- for (max_log = 0, insn = get_insns (), i = 1; insn; insn = NEXT_INSN (insn))
+ max_log = 0;
+ max_skip = 0;
+
+ for (insn = get_insns (), i = 1; insn; insn = NEXT_INSN (insn))
{
int log;
log = LABEL_ALIGN (insn);
if (max_log < log)
- max_log = log;
- next = NEXT_INSN (insn);
-/* ADDR_VECs only take room if read-only data goes into the text section. */
-#if !defined(READONLY_DATA_SECTION) || defined(JUMP_TABLES_IN_TEXT_SECTION)
- if (next && GET_CODE (next) == JUMP_INSN)
{
- 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_log = log;
+ max_skip = LABEL_ALIGN_MAX_SKIP;
}
+ next = NEXT_INSN (insn);
+ /* ADDR_VECs only take room if read-only data goes into the text
+ section. */
+ if (JUMP_TABLES_IN_TEXT_SECTION
+#if !defined(READONLY_DATA_SECTION)
+ || 1
#endif
+ )
+ if (next && GET_CODE (next) == JUMP_INSN)
+ {
+ 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;
+ }
+ }
+ }
LABEL_TO_ALIGNMENT (insn) = max_log;
+ LABEL_TO_MAX_SKIP (insn) = max_skip;
max_log = 0;
+ max_skip = 0;
}
else if (GET_CODE (insn) == BARRIER)
{
{
log = LABEL_ALIGN_AFTER_BARRIER (insn);
if (max_log < log)
- max_log = log;
+ {
+ max_log = log;
+ max_skip = LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP;
+ }
break;
}
}
{
log = LOOP_ALIGN (insn);
if (max_log < log)
- max_log = log;
+ {
+ max_log = log;
+ max_skip = LOOP_ALIGN_MAX_SKIP;
+ }
break;
}
}
{
/* This only takes room if read-only data goes into the text
section. */
-#if !defined(READONLY_DATA_SECTION) || defined(JUMP_TABLES_IN_TEXT_SECTION)
- insn_lengths[uid] = (XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC)
- * GET_MODE_SIZE (GET_MODE (body)));
+ if (JUMP_TABLES_IN_TEXT_SECTION
+#if !defined(READONLY_DATA_SECTION)
+ || 1
+#endif
+ )
+ insn_lengths[uid] = (XVECLEN (body,
+ GET_CODE (body) == ADDR_DIFF_VEC)
+ * GET_MODE_SIZE (GET_MODE (body)));
/* Alignment is handled by ADDR_VEC_ALIGN. */
-#endif
}
else if (asm_noperands (body) >= 0)
insn_lengths[uid] = asm_insn_count (body) * insn_default_length (insn);
PUT_MODE (body, CASE_VECTOR_SHORTEN_MODE (min_addr - rel_addr,
max_addr - rel_addr,
body));
-#if !defined(READONLY_DATA_SECTION) || defined(JUMP_TABLES_IN_TEXT_SECTION)
- insn_lengths[uid]
- = (XVECLEN (body, 1) * GET_MODE_SIZE (GET_MODE (body)));
- insn_current_address += insn_lengths[uid];
- if (insn_lengths[uid] != old_length)
- something_changed = 1;
+ if (JUMP_TABLES_IN_TEXT_SECTION
+#if !defined(READONLY_DATA_SECTION)
+ || 1
#endif
+ )
+ {
+ insn_lengths[uid]
+ = (XVECLEN (body, 1) * GET_MODE_SIZE (GET_MODE (body)));
+ insn_current_address += insn_lengths[uid];
+ if (insn_lengths[uid] != old_length)
+ something_changed = 1;
+ }
+
continue;
}
#endif /* CASE_VECTOR_SHORTEN_MODE */
int i;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (!call_used_regs[i] && !call_fixed_regs[i])
+ if (!call_used_regs[i])
regs_ever_live[i] = 1;
}
#endif
max_uid = INSN_UID (insn);
if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0)
line_note_exists[NOTE_LINE_NUMBER (insn)] = 1;
+#ifdef HAVE_cc0
+ /* If CC tracking across branches is enabled, record the insn which
+ jumps to each branch only reached from one place. */
+ if (GET_CODE (insn) == JUMP_INSN)
+ {
+ rtx lab = JUMP_LABEL (insn);
+ if (lab && LABEL_NUSES (lab) == 1)
+ {
+ LABEL_REFS (lab) = insn;
+ }
+ }
+#endif
}
/* Initialize insn_eh_region table if eh is being used. */
&& ! exceptions_via_longjmp)
{
ASM_OUTPUT_INTERNAL_LABEL (file, "LEHB", NOTE_BLOCK_NUMBER (insn));
- add_eh_table_entry (NOTE_BLOCK_NUMBER (insn));
+ if (! flag_new_exceptions)
+ add_eh_table_entry (NOTE_BLOCK_NUMBER (insn));
#ifdef ASM_OUTPUT_EH_REGION_BEG
ASM_OUTPUT_EH_REGION_BEG (file, NOTE_BLOCK_NUMBER (insn));
#endif
&& ! exceptions_via_longjmp)
{
ASM_OUTPUT_INTERNAL_LABEL (file, "LEHE", NOTE_BLOCK_NUMBER (insn));
+ if (flag_new_exceptions)
+ add_eh_table_entry (NOTE_BLOCK_NUMBER (insn));
#ifdef ASM_OUTPUT_EH_REGION_END
ASM_OUTPUT_EH_REGION_END (file, NOTE_BLOCK_NUMBER (insn));
#endif
if (CODE_LABEL_NUMBER (insn) <= max_labelno)
{
int align = LABEL_TO_ALIGNMENT (insn);
+#ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
+ int max_skip = LABEL_TO_MAX_SKIP (insn);
+#endif
if (align && NEXT_INSN (insn))
+#ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
+ ASM_OUTPUT_MAX_SKIP_ALIGN (file, align, max_skip);
+#else
ASM_OUTPUT_ALIGN (file, align);
+#endif
}
+#ifdef HAVE_cc0
CC_STATUS_INIT;
+ /* If this label is reached from only one place, set the condition
+ codes from the instruction just before the branch. */
+ if (LABEL_NUSES (insn) == 1)
+ {
+ rtx jump = LABEL_REFS (insn);
+ rtx barrier = prev_nonnote_insn (insn);
+ rtx prev;
+ /* If the LABEL_REFS field of this label has been set to point
+ at a branch, the predecessor of the branch is a regular
+ insn, and that branch is the only way to reach this label,
+ set the condition codes based on the branch and its
+ predecessor. */
+ if (barrier && GET_CODE (barrier) == BARRIER
+ && jump && GET_CODE (jump) == JUMP_INSN
+ && (prev = prev_nonnote_insn (jump))
+ && GET_CODE (prev) == INSN)
+ {
+ NOTICE_UPDATE_CC (PATTERN (prev), prev);
+ NOTICE_UPDATE_CC (PATTERN (jump), jump);
+ }
+ }
+#endif
if (prescan > 0)
break;
new_block = 1;
if (GET_CODE (nextbody) == ADDR_VEC
|| GET_CODE (nextbody) == ADDR_DIFF_VEC)
{
-#ifndef JUMP_TABLES_IN_TEXT_SECTION
- readonly_data_section ();
+#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. */
+#else
+ if (! JUMP_TABLES_IN_TEXT_SECTION)
+ {
+ readonly_data_section ();
#ifdef READONLY_DATA_SECTION
- ASM_OUTPUT_ALIGN (file,
- exact_log2 (BIGGEST_ALIGNMENT
- / BITS_PER_UNIT));
+ ASM_OUTPUT_ALIGN (file,
+ exact_log2 (BIGGEST_ALIGNMENT
+ / BITS_PER_UNIT));
#endif /* READONLY_DATA_SECTION */
-#else /* JUMP_TABLES_IN_TEXT_SECTION */
- function_section (current_function_decl);
-#endif /* JUMP_TABLES_IN_TEXT_SECTION */
+ }
+ else
+ function_section (current_function_decl);
+
#ifdef ASM_OUTPUT_CASE_LABEL
ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
NEXT_INSN (insn));
#else
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn));
#endif
+#endif
break;
}
}
app_on = 0;
}
+#if defined(ASM_OUTPUT_ADDR_VEC) || defined(ASM_OUTPUT_ADDR_DIFF_VEC)
+ if (GET_CODE (body) == ADDR_VEC)
+ {
+#ifdef ASM_OUTPUT_ADDR_VEC
+ ASM_OUTPUT_ADDR_VEC (PREV_INSN (insn), body);
+#else
+ abort();
+#endif
+ }
+ else
+ {
+#ifdef ASM_OUTPUT_ADDR_DIFF_VEC
+ ASM_OUTPUT_ADDR_DIFF_VEC (PREV_INSN (insn), body);
+#else
+ abort();
+#endif
+ }
+#else
vlen = XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC);
for (idx = 0; idx < vlen; idx++)
{
CODE_LABEL_NUMBER (PREV_INSN (insn)),
insn);
#endif
+#endif
function_section (current_function_decl);
/* If we didn't split the insn, go away. */
if (new == insn && PATTERN (new) == body)
- abort ();
+ fatal_insn ("Could not split insn", insn);
#ifdef HAVE_ATTR_length
/* This instruction should have been split in shorten_branches,
- MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (y))));
PUT_CODE (x, MEM);
MEM_VOLATILE_P (x) = MEM_VOLATILE_P (y);
+ MEM_IN_STRUCT_P (x) = MEM_IN_STRUCT_P (y);
+ MEM_ALIAS_SET (x) = MEM_ALIAS_SET (y);
XEXP (x, 0) = plus_constant (XEXP (y, 0), offset);
}
if (this_is_asm_operands)
error_for_asm (this_is_asm_operands, "invalid `asm': %s", str);
else
- abort ();
+ fatal ("Internal compiler error, output_operand_lossage `%s'", str);
}
\f
/* Output of assembler code from a template, and its subroutines. */
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