From 0d45dc27a174acaf7170bb60c341bc9ad42b32b8 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Wed, 29 Jun 1994 18:57:34 -0400 Subject: [PATCH] (end_final,profile_function): Profiling variables are size of pointer, not int. From-SVN: r7609 --- gcc/final.c | 3059 ----------------------------------------------------------- 1 file changed, 3059 deletions(-) diff --git a/gcc/final.c b/gcc/final.c index e2cb53e..e69de29 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -1,3059 +0,0 @@ -/* Convert RTL to assembler code and output it, for GNU compiler. - Copyright (C) 1987, 88, 89, 92, 93, 1994 Free Software Foundation, Inc. - -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, 675 Mass Ave, Cambridge, MA 02139, USA. */ - - -/* This is the final pass of the compiler. - It looks at the rtl code for a function and outputs assembler code. - - Call `final_start_function' to output the assembler code for function entry, - `final' to output assembler code for some RTL code, - `final_end_function' to output assembler code for function exit. - If a function is compiled in several pieces, each piece is - output separately with `final'. - - Some optimizations are also done at this level. - Move instructions that were made unnecessary by good register allocation - are detected and omitted from the output. (Though most of these - are removed by the last jump pass.) - - Instructions to set the condition codes are omitted when it can be - seen that the condition codes already had the desired values. - - In some cases it is sufficient if the inherited condition codes - have related values, but this may require the following insn - (the one that tests the condition codes) to be modified. - - The code for the function prologue and epilogue are generated - directly as assembler code by the macros FUNCTION_PROLOGUE and - FUNCTION_EPILOGUE. Those instructions never exist as rtl. */ - -#include "config.h" -#ifdef __STDC__ -#include -#else -#include -#endif -#include -#include - -#include "tree.h" -#include "rtl.h" -#include "regs.h" -#include "insn-config.h" -#include "insn-flags.h" -#include "insn-attr.h" -#include "insn-codes.h" -#include "recog.h" -#include "conditions.h" -#include "flags.h" -#include "real.h" -#include "hard-reg-set.h" -#include "defaults.h" -#include "output.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 "gstab.h" /* If doing DBX on sysV, use our own stab.h. */ -#else -#include /* On BSD, use the system's stab.h. */ -#endif /* not USG */ -#endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */ - -#ifdef XCOFF_DEBUGGING_INFO -#include "xcoffout.h" -#endif - -/* .stabd code for line number. */ -#ifndef N_SLINE -#define N_SLINE 0x44 -#endif - -/* .stabs code for included file name. */ -#ifndef N_SOL -#define N_SOL 0x84 -#endif - -#ifndef INT_TYPE_SIZE -#define INT_TYPE_SIZE BITS_PER_WORD -#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 -#define CC_STATUS_INIT -#endif - -/* How to start an assembler comment. */ -#ifndef ASM_COMMENT_START -#define ASM_COMMENT_START ";#" -#endif - -/* 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) == ';') -#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. */ -int leaf_function; - -/* Last insn processed by final_scan_insn. */ -static rtx debug_insn = 0; - -/* Line number of last NOTE. */ -static int last_linenum; - -/* Filename of last NOTE. */ -static char *last_filename; - -/* Number of basic blocks seen so far; - used if profile_block_flag is set. */ -static int count_basic_blocks; - -/* Nonzero while outputting an `asm' with operands. - This means that inconsistencies are the user's fault, so don't abort. - The precise value is the insn being output, to pass to error_for_asm. */ -static rtx this_is_asm_operands; - -/* Number of operands of this insn, for an `asm' with operands. */ -static int insn_noperands; - -/* Compare optimization flag. */ - -static rtx last_ignored_compare = 0; - -/* Flag indicating this insn is the start of a new basic block. */ - -static int new_block = 1; - -/* All the symbol-blocks (levels of scoping) in the compilation - are assigned sequence numbers in order of appearance of the - beginnings of the symbol-blocks. Both final and dbxout do this, - and assume that they will both give the same number to each block. - Final uses these sequence numbers to generate assembler label names - LBBnnn and LBEnnn for the beginning and end of the symbol-block. - Dbxout uses the sequence numbers to generate references to the same labels - from the dbx debugging information. - - Sdb records this level at the beginning of each function, - in order to find the current level when recursing down declarations. - It outputs the block beginning and endings - at the point in the asm file where the blocks would begin and end. */ - -int next_block_index; - -/* Assign a unique number to each insn that is output. - This can be used to generate unique local labels. */ - -static int insn_counter = 0; - -#ifdef HAVE_cc0 -/* This variable contains machine-dependent flags (defined in tm.h) - set and examined by output routines - that describe how to interpret the condition codes properly. */ - -CC_STATUS cc_status; - -/* During output of an insn, this contains a copy of cc_status - from before the insn. */ - -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]; - -/* Nonzero means current function must be given a frame pointer. - Set in stmt.c if anything is allocated on the stack there. - Set in reload1.c if anything is allocated on the stack there. */ - -int frame_pointer_needed; - -/* Assign unique numbers to labels generated for profiling. */ - -int profile_label_no; - -/* Length so far allocated in PENDING_BLOCKS. */ - -static int max_block_depth; - -/* Stack of sequence numbers of symbol-blocks of which we have seen the - beginning but not yet the end. Sequence numbers are assigned at - the beginning; this stack allows us to find the sequence number - of a block that is ending. */ - -static int *pending_blocks; - -/* Number of elements currently in use in PENDING_BLOCKS. */ - -static int block_depth; - -/* Nonzero if have enabled APP processing of our assembler output. */ - -static int app_on; - -/* If we are outputting an insn sequence, this contains the sequence rtx. - Zero otherwise. */ - -rtx final_sequence; - -#ifdef ASSEMBLER_DIALECT - -/* Number of the assembler dialect to use, starting at 0. */ -static int dialect_number; -#endif - -/* Indexed by line number, nonzero if there is a note for that line. */ - -static char *line_note_exists; - -/* Linked list to hold line numbers for each basic block. */ - -struct bb_list { - struct bb_list *next; /* pointer to next basic block */ - int line_num; /* line number */ - int file_label_num; /* LPBC label # for stored filename */ - int func_label_num; /* LPBC label # for stored function name */ -}; - -static struct bb_list *bb_head = 0; /* Head of basic block list */ -static struct bb_list **bb_tail = &bb_head; /* Ptr to store next bb ptr */ -static int bb_file_label_num = -1; /* Current label # for file */ -static int bb_func_label_num = -1; /* Current label # for func */ - -/* Linked list to hold the strings for each file and function name output. */ - -struct bb_str { - struct bb_str *next; /* pointer to next string */ - char *string; /* string */ - int label_num; /* label number */ - int length; /* string length */ -}; - -extern rtx peephole PROTO((rtx)); - -static struct bb_str *sbb_head = 0; /* Head of string list. */ -static struct bb_str **sbb_tail = &sbb_head; /* Ptr to store next bb str */ -static int sbb_label_num = 0; /* Last label used */ - -static int asm_insn_count PROTO((rtx)); -static void profile_function PROTO((FILE *)); -static void profile_after_prologue PROTO((FILE *)); -static void add_bb PROTO((FILE *)); -static int add_bb_string PROTO((char *, int)); -static void output_source_line PROTO((FILE *, rtx)); -static rtx walk_alter_subreg PROTO((rtx)); -static int alter_cond PROTO((rtx)); -static void output_operand PROTO((rtx, int)); -static void leaf_renumber_regs PROTO((rtx)); - -/* Initialize data in final at the beginning of a compilation. */ - -void -init_final (filename) - char *filename; -{ - next_block_index = 2; - app_on = 0; - max_block_depth = 20; - pending_blocks = (int *) xmalloc (20 * sizeof *pending_blocks); - final_sequence = 0; - -#ifdef ASSEMBLER_DIALECT - dialect_number = ASSEMBLER_DIALECT; -#endif -} - -/* Called at end of source file, - to output the block-profiling table for this entire compilation. */ - -void -end_final (filename) - char *filename; -{ - int i; - - if (profile_block_flag) - { - char name[20]; - int align = exact_log2 (BIGGEST_ALIGNMENT / BITS_PER_UNIT); - int size = (INT_TYPE_SIZE / BITS_PER_UNIT) * count_basic_blocks; - int rounded = size; - struct bb_list *ptr; - struct bb_str *sptr; - - rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; - rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); - - data_section (); - - /* Output the main header, of 10 words: - 0: 1 if this file's initialized, else 0. - 1: address of file name (LPBX1). - 2: address of table of counts (LPBX2). - 3: number of counts in the table. - 4: always 0, for compatibility with Sun. - - The following are GNU extensions: - - 5: address of table of start addrs of basic blocks (LPBX3). - 6: Number of bytes in this header. - 7: address of table of function names (LPBX4). - 8: address of table of line numbers (LPBX5) or 0. - 9: address of table of file names (LPBX6) or 0. */ - - ASM_OUTPUT_ALIGN (asm_out_file, align); - - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 0); - /* zero word */ - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - - /* address of filename */ - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 1); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - - /* address of count table */ - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 2); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - - /* count of the # of basic blocks */ - assemble_integer (GEN_INT (count_basic_blocks), UNITS_PER_WORD, 1); - - /* zero word (link field) */ - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - - /* address of basic block start address table */ - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 3); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - - /* byte count for extended structure. */ - assemble_integer (GEN_INT (10 * UNITS_PER_WORD), UNITS_PER_WORD, 1); - - /* address of function name table */ - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 4); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - - /* address of line number and filename tables if debugging. */ - if (write_symbols != NO_DEBUG) - { - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 5); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 6); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - } - else - { - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - } - - /* Output the file name changing the suffix to .d for Sun tcov - compatibility. */ - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 1); - { - int len = strlen (filename); - char *data_file = (char *) alloca (len + 3); - strcpy (data_file, filename); - strip_off_ending (data_file, len); - strcat (data_file, ".d"); - assemble_string (data_file, strlen (data_file) + 1); - } - - /* Make space for the table of counts. */ - if (flag_no_common || size == 0) - { - /* Realign data section. */ - ASM_OUTPUT_ALIGN (asm_out_file, align); - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 2); - if (size != 0) - assemble_zeros (size); - } - else - { - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 2); -#ifdef ASM_OUTPUT_SHARED_LOCAL - if (flag_shared_data) - ASM_OUTPUT_SHARED_LOCAL (asm_out_file, name, size, rounded); - else -#endif -#ifdef ASM_OUTPUT_ALIGNED_LOCAL - ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, - BIGGEST_ALIGNMENT); -#else - ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded); -#endif - } - - /* Output any basic block strings */ - readonly_data_section (); - if (sbb_head) - { - ASM_OUTPUT_ALIGN (asm_out_file, align); - for (sptr = sbb_head; sptr != 0; sptr = sptr->next) - { - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBC", sptr->label_num); - assemble_string (sptr->string, sptr->length); - } - } - - /* Output the table of addresses. */ - /* Realign in new section */ - ASM_OUTPUT_ALIGN (asm_out_file, align); - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 3); - for (i = 0; i < count_basic_blocks; i++) - { - ASM_GENERATE_INTERNAL_LABEL (name, "LPB", i); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), - UNITS_PER_WORD, 1); - } - - /* Output the table of function names. */ - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 4); - for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) - { - if (ptr->func_label_num >= 0) - { - ASM_GENERATE_INTERNAL_LABEL (name, "LPBC", ptr->func_label_num); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), - UNITS_PER_WORD, 1); - } - else - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - } - - for ( ; i < count_basic_blocks; i++) - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - - if (write_symbols != NO_DEBUG) - { - /* Output the table of line numbers. */ - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 5); - for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) - assemble_integer (GEN_INT (ptr->line_num), UNITS_PER_WORD, 1); - - for ( ; i < count_basic_blocks; i++) - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - - /* Output the table of file names. */ - ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LPBX", 6); - for ((ptr = bb_head), (i = 0); ptr != 0; (ptr = ptr->next), i++) - { - if (ptr->file_label_num >= 0) - { - ASM_GENERATE_INTERNAL_LABEL (name, "LPBC", ptr->file_label_num); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), - UNITS_PER_WORD, 1); - } - else - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - } - - for ( ; i < count_basic_blocks; i++) - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - } - - /* End with the address of the table of addresses, - so we can find it easily, as the last word in the file's text. */ - ASM_GENERATE_INTERNAL_LABEL (name, "LPBX", 3); - assemble_integer (gen_rtx (SYMBOL_REF, Pmode, name), UNITS_PER_WORD, 1); - } -} - -/* Enable APP processing of subsequent output. - Used before the output from an `asm' statement. */ - -void -app_enable () -{ - if (! app_on) - { - fprintf (asm_out_file, ASM_APP_ON); - app_on = 1; - } -} - -/* Disable APP processing of subsequent output. - Called from varasm.c before most kinds of output. */ - -void -app_disable () -{ - if (app_on) - { - fprintf (asm_out_file, ASM_APP_OFF); - app_on = 0; - } -} - -/* Return the number of slots filled in the current - delayed branch sequence (we don't count the insn needing the - delay slot). Zero if not in a delayed branch sequence. */ - -#ifdef DELAY_SLOTS -int -dbr_sequence_length () -{ - if (final_sequence != 0) - return XVECLEN (final_sequence, 0) - 1; - else - return 0; -} -#endif - -/* The next two pages contain routines used to compute the length of an insn - and to shorten branches. */ - -/* Arrays for insn lengths, and addresses. The latter is referenced by - `insn_current_length'. */ - -static short *insn_lengths; -int *insn_addresses; - -/* Address of insn being processed. Used by `insn_current_length'. */ -int insn_current_address; - -/* Indicate that branch shortening hasn't yet been done. */ - -void -init_insn_lengths () -{ - insn_lengths = 0; -} - -/* 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 (insn) - rtx insn; -{ -#ifdef HAVE_ATTR_length - rtx body; - int i; - int length = 0; - - if (insn_lengths) - return insn_lengths[INSN_UID (insn)]; - else - switch (GET_CODE (insn)) - { - case NOTE: - case BARRIER: - case CODE_LABEL: - return 0; - - case CALL_INSN: - length = insn_default_length (insn); - break; - - case JUMP_INSN: - body = PATTERN (insn); - if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) - { - /* This only takes room if jump tables go into the text section. */ -#if !defined(READONLY_DATA_SECTION) || defined(JUMP_TABLES_IN_TEXT_SECTION) - length = (XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC) - * GET_MODE_SIZE (GET_MODE (body))); - - /* Be pessimistic and assume worst-case alignment. */ - length += (GET_MODE_SIZE (GET_MODE (body)) - 1); -#else - return 0; -#endif - } - else - length = insn_default_length (insn); - break; - - case INSN: - body = PATTERN (insn); - if (GET_CODE (body) == USE || GET_CODE (body) == CLOBBER) - return 0; - - else if (GET_CODE (body) == ASM_INPUT || asm_noperands (body) >= 0) - length = asm_insn_count (body) * insn_default_length (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); - } - -#ifdef ADJUST_INSN_LENGTH - ADJUST_INSN_LENGTH (insn, length); -#endif - return length; -#else /* not HAVE_ATTR_length */ - return 0; -#endif /* not HAVE_ATTR_length */ -} - -/* Make a pass over all insns and compute their actual lengths by shortening - any branches of variable length if possible. */ - -/* Give a default value for the lowest address in a function. */ - -#ifndef FIRST_INSN_ADDRESS -#define FIRST_INSN_ADDRESS 0 -#endif - -void -shorten_branches (first) - rtx first; -{ -#ifdef HAVE_ATTR_length - rtx insn; - int something_changed = 1; - int max_uid = 0; - char *varying_length; - rtx body; - int uid; - - /* Compute maximum UID and allocate arrays. */ - for (insn = first; insn; insn = NEXT_INSN (insn)) - if (INSN_UID (insn) > max_uid) - max_uid = INSN_UID (insn); - - max_uid++; - insn_lengths = (short *) oballoc (max_uid * sizeof (short)); - insn_addresses = (int *) oballoc (max_uid * sizeof (int)); - varying_length = (char *) oballoc (max_uid * sizeof (char)); - - /* Compute initial lengths, addresses, and varying flags for each insn. */ - for (insn_current_address = FIRST_INSN_ADDRESS, insn = first; - insn != 0; - insn_current_address += insn_lengths[uid], insn = NEXT_INSN (insn)) - { - uid = INSN_UID (insn); - insn_addresses[uid] = insn_current_address; - insn_lengths[uid] = 0; - varying_length[uid] = 0; - - if (GET_CODE (insn) == NOTE || GET_CODE (insn) == BARRIER - || GET_CODE (insn) == CODE_LABEL) - continue; - - body = PATTERN (insn); - if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) - { - /* This only takes room if read-only data goes into the text - section. */ -#if !defined(READONLY_DATA_SECTION) || defined(JUMP_TABLES_IN_TEXT_SECTION) - int unitsize = GET_MODE_SIZE (GET_MODE (body)); - - insn_lengths[uid] = (XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC) - * GET_MODE_SIZE (GET_MODE (body))); - - /* Account for possible alignment. */ - insn_lengths[uid] - += unitsize - (insn_current_address & (unitsize - 1)); -#else - ; -#endif - } - else if (asm_noperands (body) >= 0) - insn_lengths[uid] = asm_insn_count (body) * insn_default_length (insn); - else if (GET_CODE (body) == SEQUENCE) - { - int i; - int const_delay_slots; -#ifdef DELAY_SLOTS - const_delay_slots = const_num_delay_slots (XVECEXP (body, 0, 0)); -#else - const_delay_slots = 0; -#endif - /* Inside a delay slot sequence, we do not do any branch shortening - if the shortening could change the number of delay slots - of the branch. */ - for (i = 0; i < XVECLEN (body, 0); i++) - { - rtx inner_insn = XVECEXP (body, 0, i); - int inner_uid = INSN_UID (inner_insn); - int inner_length; - - if (asm_noperands (PATTERN (XVECEXP (body, 0, i))) >= 0) - inner_length = (asm_insn_count (PATTERN (inner_insn)) - * insn_default_length (inner_insn)); - else - inner_length = insn_default_length (inner_insn); - - insn_lengths[inner_uid] = inner_length; - if (const_delay_slots) - { - if ((varying_length[inner_uid] - = insn_variable_length_p (inner_insn)) != 0) - varying_length[uid] = 1; - insn_addresses[inner_uid] = (insn_current_address + - insn_lengths[uid]); - } - else - varying_length[inner_uid] = 0; - insn_lengths[uid] += inner_length; - } - } - else if (GET_CODE (body) != USE && GET_CODE (body) != CLOBBER) - { - insn_lengths[uid] = insn_default_length (insn); - varying_length[uid] = insn_variable_length_p (insn); - } - - /* If needed, do any adjustment. */ -#ifdef ADJUST_INSN_LENGTH - ADJUST_INSN_LENGTH (insn, insn_lengths[uid]); -#endif - } - - /* Now loop over all the insns finding varying length insns. For each, - get the current insn length. If it has changed, reflect the change. - When nothing changes for a full pass, we are done. */ - - while (something_changed) - { - something_changed = 0; - for (insn_current_address = FIRST_INSN_ADDRESS, insn = first; - insn != 0; - insn = NEXT_INSN (insn)) - { - int new_length; - int tmp_length; - - uid = INSN_UID (insn); - insn_addresses[uid] = insn_current_address; - if (! varying_length[uid]) - { - insn_current_address += insn_lengths[uid]; - continue; - } - if (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == SEQUENCE) - { - int i; - - body = PATTERN (insn); - new_length = 0; - for (i = 0; i < XVECLEN (body, 0); i++) - { - rtx inner_insn = XVECEXP (body, 0, i); - int inner_uid = INSN_UID (inner_insn); - int inner_length; - - insn_addresses[inner_uid] = insn_current_address; - - /* insn_current_length returns 0 for insns with a - non-varying length. */ - if (! varying_length[inner_uid]) - inner_length = insn_lengths[inner_uid]; - else - inner_length = insn_current_length (inner_insn); - - if (inner_length != insn_lengths[inner_uid]) - { - insn_lengths[inner_uid] = inner_length; - something_changed = 1; - } - insn_current_address += insn_lengths[inner_uid]; - new_length += inner_length; - } - } - else - { - new_length = insn_current_length (insn); - insn_current_address += new_length; - } - -#ifdef SHORTEN_WITH_ADJUST_INSN_LENGTH -#ifdef ADJUST_INSN_LENGTH - /* If needed, do any adjustment. */ - tmp_length = new_length; - ADJUST_INSN_LENGTH (insn, new_length); - insn_current_address += (new_length - tmp_length); -#endif -#endif - - if (new_length != insn_lengths[uid]) - { - insn_lengths[uid] = new_length; - something_changed = 1; - } - } - } -#endif /* HAVE_ATTR_length */ -} - -#ifdef HAVE_ATTR_length -/* Given the body of an INSN known to be generated by an ASM statement, return - the number of machine instructions likely to be generated for this insn. - This is used to compute its length. */ - -static int -asm_insn_count (body) - rtx body; -{ - char *template; - int count = 1; - - for (template = decode_asm_operands (body, NULL_PTR, NULL_PTR, - NULL_PTR, NULL_PTR); - *template; template++) - if (IS_ASM_LOGICAL_LINE_SEPARATOR(*template) || *template == '\n') - count++; - - return count; -} -#endif - -/* 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 - assembler pseudo-ops have already been output in `assemble_start_function'. - - FIRST is the first insn of the rtl for the function being compiled. - FILE is the file to write assembler code to. - OPTIMIZE is nonzero if we should eliminate redundant - test and compare insns. */ - -void -final_start_function (first, file, optimize) - rtx first; - FILE *file; - int optimize; -{ - block_depth = 0; - - this_is_asm_operands = 0; - -#ifdef NON_SAVING_SETJMP - /* A function that calls setjmp should save and restore all the - call-saved registers on a system where longjmp clobbers them. */ - if (NON_SAVING_SETJMP && current_function_calls_setjmp) - { - int i; - - for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) - if (!call_used_regs[i] && !call_fixed_regs[i]) - regs_ever_live[i] = 1; - } -#endif - - /* Initial line number is supposed to be output - before the function's prologue and label - so that the function's address will not appear to be - in the last statement of the preceding function. */ - if (NOTE_LINE_NUMBER (first) != NOTE_INSN_DELETED) - { - if (write_symbols == SDB_DEBUG) - /* For sdb, let's not, but say we did. - We need to set last_linenum for sdbout_function_begin, - but we can't have an actual line number before the .bf symbol. - (sdb_begin_function_line is not set, - and other compilers don't do it.) */ - last_linenum = NOTE_LINE_NUMBER (first); -#ifdef XCOFF_DEBUGGING_INFO - else if (write_symbols == XCOFF_DEBUG) - { - last_linenum = NOTE_LINE_NUMBER (first); - xcoffout_output_first_source_line (file, last_linenum); - } -#endif - else - output_source_line (file, first); - } - -#ifdef LEAF_REG_REMAP - if (leaf_function) - leaf_renumber_regs (first); -#endif - - /* The Sun386i and perhaps other machines don't work right - if the profiling code comes after the prologue. */ -#ifdef PROFILE_BEFORE_PROLOGUE - if (profile_flag) - profile_function (file); -#endif /* PROFILE_BEFORE_PROLOGUE */ - -#ifdef FUNCTION_PROLOGUE - /* First output the function prologue: code to set up the stack frame. */ - FUNCTION_PROLOGUE (file, get_frame_size ()); -#endif - -#if defined (SDB_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) - if (write_symbols == SDB_DEBUG || write_symbols == XCOFF_DEBUG) - next_block_index = 1; -#endif - - /* If the machine represents the prologue as RTL, the profiling code must - be emitted when NOTE_INSN_PROLOGUE_END is scanned. */ -#ifdef HAVE_prologue - if (! HAVE_prologue) -#endif - profile_after_prologue (file); - - profile_label_no++; - - /* If we are doing basic block profiling, remember a printable version - of the function name. */ - if (profile_block_flag) - { - char *junk = "function"; - bb_func_label_num = - add_bb_string ((*decl_printable_name) (current_function_decl, &junk), FALSE); - } -} - -static void -profile_after_prologue (file) - FILE *file; -{ -#ifdef FUNCTION_BLOCK_PROFILER - if (profile_block_flag) - { - FUNCTION_BLOCK_PROFILER (file, profile_label_no); - } -#endif /* FUNCTION_BLOCK_PROFILER */ - -#ifndef PROFILE_BEFORE_PROLOGUE - if (profile_flag) - profile_function (file); -#endif /* not PROFILE_BEFORE_PROLOGUE */ -} - -static void -profile_function (file) - FILE *file; -{ - int align = MIN (BIGGEST_ALIGNMENT, BITS_PER_WORD); - int sval = current_function_returns_struct; - int cxt = current_function_needs_context; - - data_section (); - ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT)); - ASM_OUTPUT_INTERNAL_LABEL (file, "LP", profile_label_no); - assemble_integer (const0_rtx, UNITS_PER_WORD, 1); - - text_section (); - -#ifdef STRUCT_VALUE_INCOMING_REGNUM - if (sval) - ASM_OUTPUT_REG_PUSH (file, STRUCT_VALUE_INCOMING_REGNUM); -#else -#ifdef STRUCT_VALUE_REGNUM - if (sval) - ASM_OUTPUT_REG_PUSH (file, STRUCT_VALUE_REGNUM); -#endif -#endif - -#if 0 -#ifdef STATIC_CHAIN_INCOMING_REGNUM - if (cxt) - ASM_OUTPUT_REG_PUSH (file, STATIC_CHAIN_INCOMING_REGNUM); -#else -#ifdef STATIC_CHAIN_REGNUM - if (cxt) - ASM_OUTPUT_REG_PUSH (file, STATIC_CHAIN_REGNUM); -#endif -#endif -#endif /* 0 */ - - FUNCTION_PROFILER (file, profile_label_no); - -#if 0 -#ifdef STATIC_CHAIN_INCOMING_REGNUM - if (cxt) - ASM_OUTPUT_REG_POP (file, STATIC_CHAIN_INCOMING_REGNUM); -#else -#ifdef STATIC_CHAIN_REGNUM - if (cxt) - ASM_OUTPUT_REG_POP (file, STATIC_CHAIN_REGNUM); -#endif -#endif -#endif /* 0 */ - -#ifdef STRUCT_VALUE_INCOMING_REGNUM - if (sval) - ASM_OUTPUT_REG_POP (file, STRUCT_VALUE_INCOMING_REGNUM); -#else -#ifdef STRUCT_VALUE_REGNUM - if (sval) - ASM_OUTPUT_REG_POP (file, STRUCT_VALUE_REGNUM); -#endif -#endif -} - -/* Output assembler code for the end of a function. - For clarity, args are same as those of `final_start_function' - even though not all of them are needed. */ - -void -final_end_function (first, file, optimize) - rtx first; - FILE *file; - int optimize; -{ - if (app_on) - { - fprintf (file, ASM_APP_OFF); - app_on = 0; - } - -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG) - sdbout_end_function (last_linenum); -#endif - -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG) - dwarfout_end_function (); -#endif - -#ifdef XCOFF_DEBUGGING_INFO - if (write_symbols == XCOFF_DEBUG) - xcoffout_end_function (file, last_linenum); -#endif - -#ifdef FUNCTION_EPILOGUE - /* Finally, output the function epilogue: - code to restore the stack frame and return to the caller. */ - FUNCTION_EPILOGUE (file, get_frame_size ()); -#endif - -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG) - sdbout_end_epilogue (); -#endif - -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG) - dwarfout_end_epilogue (); -#endif - -#ifdef XCOFF_DEBUGGING_INFO - if (write_symbols == XCOFF_DEBUG) - xcoffout_end_epilogue (file); -#endif - - bb_func_label_num = -1; /* not in function, nuke label # */ - - /* If FUNCTION_EPILOGUE is not defined, then the function body - itself contains return instructions wherever needed. */ -} - -/* Add a block to the linked list that remembers the current line/file/function - for basic block profiling. Emit the label in front of the basic block and - the instructions that increment the count field. */ - -static void -add_bb (file) - FILE *file; -{ - struct bb_list *ptr = (struct bb_list *) permalloc (sizeof (struct bb_list)); - - /* Add basic block to linked list. */ - ptr->next = 0; - ptr->line_num = last_linenum; - ptr->file_label_num = bb_file_label_num; - ptr->func_label_num = bb_func_label_num; - *bb_tail = ptr; - bb_tail = &ptr->next; - - /* Enable the table of basic-block use counts - to point at the code it applies to. */ - ASM_OUTPUT_INTERNAL_LABEL (file, "LPB", count_basic_blocks); - - /* Before first insn of this basic block, increment the - count of times it was entered. */ -#ifdef BLOCK_PROFILER - BLOCK_PROFILER (file, count_basic_blocks); - CC_STATUS_INIT; -#endif - - new_block = 0; - count_basic_blocks++; -} - -/* Add a string to be used for basic block profiling. */ - -static int -add_bb_string (string, perm_p) - char *string; - int perm_p; -{ - int len; - struct bb_str *ptr = 0; - - if (!string) - { - string = ""; - perm_p = TRUE; - } - - /* Allocate a new string if the current string isn't permanent. If - the string is permanent search for the same string in other - allocations. */ - - len = strlen (string) + 1; - if (!perm_p) - { - char *p = (char *) permalloc (len); - bcopy (string, p, len); - string = p; - } - else - for (ptr = sbb_head; ptr != (struct bb_str *)0; ptr = ptr->next) - if (ptr->string == string) - break; - - /* Allocate a new string block if we need to. */ - if (!ptr) - { - ptr = (struct bb_str *) permalloc (sizeof (*ptr)); - ptr->next = 0; - ptr->length = len; - ptr->label_num = sbb_label_num++; - ptr->string = string; - *sbb_tail = ptr; - sbb_tail = &ptr->next; - } - - return ptr->label_num; -} - - -/* 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. */ - -void -final (first, file, optimize, prescan) - rtx first; - FILE *file; - int optimize; - int prescan; -{ - register rtx insn; - int max_line = 0; - - last_ignored_compare = 0; - new_block = 1; - - /* Make a map indicating which line numbers appear in this function. - When producing SDB debugging info, delete troublesome line number - notes from inlined functions in other files as well as duplicate - line number notes. */ -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG) - { - rtx last = 0; - for (insn = first; insn; insn = NEXT_INSN (insn)) - if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) - { - if ((RTX_INTEGRATED_P (insn) - && strcmp (NOTE_SOURCE_FILE (insn), main_input_filename) != 0) - || (last != 0 - && NOTE_LINE_NUMBER (insn) == NOTE_LINE_NUMBER (last) - && NOTE_SOURCE_FILE (insn) == NOTE_SOURCE_FILE (last))) - { - NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; - NOTE_SOURCE_FILE (insn) = 0; - continue; - } - last = insn; - if (NOTE_LINE_NUMBER (insn) > max_line) - max_line = NOTE_LINE_NUMBER (insn); - } - } - else -#endif - { - for (insn = first; insn; insn = NEXT_INSN (insn)) - if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > max_line) - max_line = NOTE_LINE_NUMBER (insn); - } - - line_note_exists = (char *) oballoc (max_line + 1); - bzero (line_note_exists, max_line + 1); - - for (insn = first; insn; insn = NEXT_INSN (insn)) - if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0) - line_note_exists[NOTE_LINE_NUMBER (insn)] = 1; - - init_recog (); - - CC_STATUS_INIT; - - /* Output the insns. */ - for (insn = NEXT_INSN (first); insn;) - insn = final_scan_insn (insn, file, optimize, prescan, 0); - - /* Do basic-block profiling here - if the last insn was a conditional branch. */ - if (profile_block_flag && new_block) - add_bb (file); -} - -/* The final scan for one insn, INSN. - Args are same as in `final', except that INSN - is the insn being scanned. - Value returned is the next insn to be scanned. - - NOPEEPHOLES is the flag to disallow peephole processing (currently - used for within delayed branch sequence output). */ - -rtx -final_scan_insn (insn, file, optimize, prescan, nopeepholes) - rtx insn; - FILE *file; - int optimize; - int prescan; - int nopeepholes; -{ - register int i; - insn_counter++; - - /* Ignore deleted insns. These can occur when we split insns (due to a - template of "#") while not optimizing. */ - if (INSN_DELETED_P (insn)) - return NEXT_INSN (insn); - - switch (GET_CODE (insn)) - { - case NOTE: - if (prescan > 0) - break; - - /* Align the beginning of a loop, for higher speed - on certain machines. */ - - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG && optimize > 0) - { -#ifdef ASM_OUTPUT_LOOP_ALIGN - rtx next = next_nonnote_insn (insn); - if (next && GET_CODE (next) == CODE_LABEL) - { - ASM_OUTPUT_LOOP_ALIGN (asm_out_file); - } -#endif - break; - } - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END) - break; - - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_PROLOGUE_END) - { -#ifdef FUNCTION_END_PROLOGUE - FUNCTION_END_PROLOGUE (file); -#endif - profile_after_prologue (file); - break; - } - -#ifdef FUNCTION_BEGIN_EPILOGUE - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EPILOGUE_BEG) - { - FUNCTION_BEGIN_EPILOGUE (file); - break; - } -#endif - - if (write_symbols == NO_DEBUG) - break; - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG) - { -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG) - sdbout_begin_function (last_linenum); -#endif -#ifdef XCOFF_DEBUGGING_INFO - if (write_symbols == XCOFF_DEBUG) - xcoffout_begin_function (file, last_linenum); -#endif -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG) - dwarfout_begin_function (); -#endif - break; - } - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED) - break; /* An insn that was "deleted" */ - if (app_on) - { - fprintf (file, ASM_APP_OFF); - app_on = 0; - } - if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_BEG - && (debug_info_level == DINFO_LEVEL_NORMAL - || debug_info_level == DINFO_LEVEL_VERBOSE -#ifdef DWARF_DEBUGGING_INFO - || write_symbols == DWARF_DEBUG -#endif - ) - ) - { - /* Beginning of a symbol-block. Assign it a sequence number - and push the number onto the stack PENDING_BLOCKS. */ - - if (block_depth == max_block_depth) - { - /* PENDING_BLOCKS is full; make it longer. */ - max_block_depth *= 2; - pending_blocks - = (int *) xrealloc (pending_blocks, - max_block_depth * sizeof (int)); - } - pending_blocks[block_depth++] = next_block_index; - - /* Output debugging info about the symbol-block beginning. */ - -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG) - sdbout_begin_block (file, last_linenum, next_block_index); -#endif -#ifdef XCOFF_DEBUGGING_INFO - if (write_symbols == XCOFF_DEBUG) - xcoffout_begin_block (file, last_linenum, next_block_index); -#endif -#ifdef DBX_DEBUGGING_INFO - if (write_symbols == DBX_DEBUG) - ASM_OUTPUT_INTERNAL_LABEL (file, "LBB", next_block_index); -#endif -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG && block_depth > 1) - dwarfout_begin_block (next_block_index); -#endif - - next_block_index++; - } - else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_END - && (debug_info_level == DINFO_LEVEL_NORMAL - || debug_info_level == DINFO_LEVEL_VERBOSE -#ifdef DWARF_DEBUGGING_INFO - || write_symbols == DWARF_DEBUG -#endif - ) - ) - { - /* End of a symbol-block. Pop its sequence number off - PENDING_BLOCKS and output debugging info based on that. */ - - --block_depth; - -#ifdef XCOFF_DEBUGGING_INFO - if (write_symbols == XCOFF_DEBUG && block_depth >= 0) - xcoffout_end_block (file, last_linenum, pending_blocks[block_depth]); -#endif -#ifdef DBX_DEBUGGING_INFO - if (write_symbols == DBX_DEBUG && block_depth >= 0) - ASM_OUTPUT_INTERNAL_LABEL (file, "LBE", - pending_blocks[block_depth]); -#endif -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG && block_depth >= 0) - sdbout_end_block (file, last_linenum, pending_blocks[block_depth]); -#endif -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG && block_depth >= 1) - dwarfout_end_block (pending_blocks[block_depth]); -#endif - } - else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL - && (debug_info_level == DINFO_LEVEL_NORMAL - || debug_info_level == DINFO_LEVEL_VERBOSE)) - { -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG) - dwarfout_label (insn); -#endif - } - else if (NOTE_LINE_NUMBER (insn) > 0) - /* This note is a line-number. */ - { - register rtx note; - -#if 0 /* This is what we used to do. */ - output_source_line (file, insn); -#endif - int note_after = 0; - - /* If there is anything real after this note, - output it. If another line note follows, omit this one. */ - for (note = NEXT_INSN (insn); note; note = NEXT_INSN (note)) - { - if (GET_CODE (note) != NOTE && GET_CODE (note) != CODE_LABEL) - break; - /* These types of notes can be significant - so make sure the preceding line number stays. */ - else if (GET_CODE (note) == NOTE - && (NOTE_LINE_NUMBER (note) == NOTE_INSN_BLOCK_BEG - || NOTE_LINE_NUMBER (note) == NOTE_INSN_BLOCK_END - || NOTE_LINE_NUMBER (note) == NOTE_INSN_FUNCTION_BEG)) - break; - else if (GET_CODE (note) == NOTE && NOTE_LINE_NUMBER (note) > 0) - { - /* Another line note follows; we can delete this note - if no intervening line numbers have notes elsewhere. */ - int num; - for (num = NOTE_LINE_NUMBER (insn) + 1; - num < NOTE_LINE_NUMBER (note); - num++) - if (line_note_exists[num]) - break; - - if (num >= NOTE_LINE_NUMBER (note)) - note_after = 1; - break; - } - } - - /* Output this line note - if it is the first or the last line note in a row. */ - if (!note_after) - output_source_line (file, insn); - } - break; - - case BARRIER: -#ifdef ASM_OUTPUT_ALIGN_CODE - /* Don't litter the assembler output with needless alignments. A - BARRIER will be placed at the end of every function if HAVE_epilogue - is true. */ - if (NEXT_INSN (insn)) - ASM_OUTPUT_ALIGN_CODE (file); -#endif - break; - - case CODE_LABEL: - CC_STATUS_INIT; - if (prescan > 0) - break; - new_block = 1; -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG && LABEL_NAME (insn)) - sdbout_label (insn); -#endif -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG && LABEL_NAME (insn)) - dwarfout_label (insn); -#endif - if (app_on) - { - fprintf (file, ASM_APP_OFF); - app_on = 0; - } - if (NEXT_INSN (insn) != 0 - && GET_CODE (NEXT_INSN (insn)) == JUMP_INSN) - { - rtx nextbody = PATTERN (NEXT_INSN (insn)); - - /* 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) - { -#ifndef JUMP_TABLES_IN_TEXT_SECTION - readonly_data_section (); -#ifdef READONLY_DATA_SECTION - ASM_OUTPUT_ALIGN (file, - exact_log2 (BIGGEST_ALIGNMENT - / BITS_PER_UNIT)); -#endif /* READONLY_DATA_SECTION */ -#else /* JUMP_TABLES_IN_TEXT_SECTION */ - text_section (); -#endif /* JUMP_TABLES_IN_TEXT_SECTION */ -#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 - break; - } - } - - ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn)); - break; - - default: - { - register rtx body = PATTERN (insn); - int insn_code_number; - char *template; - rtx note; - - /* An INSN, JUMP_INSN or CALL_INSN. - First check for special kinds that recog doesn't recognize. */ - - if (GET_CODE (body) == USE /* These are just declarations */ - || GET_CODE (body) == CLOBBER) - break; - -#ifdef HAVE_cc0 - /* If there is a REG_CC_SETTER note on this insn, it means that - the setting of the condition code was done in the delay slot - of the insn that branched here. So recover the cc status - from the insn that set it. */ - - note = find_reg_note (insn, REG_CC_SETTER, NULL_RTX); - if (note) - { - NOTICE_UPDATE_CC (PATTERN (XEXP (note, 0)), XEXP (note, 0)); - cc_prev_status = cc_status; - } -#endif - - /* Detect insns that are really jump-tables - and output them as such. */ - - if (GET_CODE (body) == ADDR_VEC || GET_CODE (body) == ADDR_DIFF_VEC) - { - register int vlen, idx; - - if (prescan > 0) - break; - - if (app_on) - { - fprintf (file, ASM_APP_OFF); - app_on = 0; - } - - vlen = XVECLEN (body, GET_CODE (body) == ADDR_DIFF_VEC); - for (idx = 0; idx < vlen; idx++) - { - if (GET_CODE (body) == ADDR_VEC) - { -#ifdef ASM_OUTPUT_ADDR_VEC_ELT - ASM_OUTPUT_ADDR_VEC_ELT - (file, CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 0, idx), 0))); -#else - abort (); -#endif - } - else - { -#ifdef ASM_OUTPUT_ADDR_DIFF_ELT - ASM_OUTPUT_ADDR_DIFF_ELT - (file, - CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 1, idx), 0)), - CODE_LABEL_NUMBER (XEXP (XEXP (body, 0), 0))); -#else - abort (); -#endif - } - } -#ifdef ASM_OUTPUT_CASE_END - ASM_OUTPUT_CASE_END (file, - CODE_LABEL_NUMBER (PREV_INSN (insn)), - insn); -#endif - - text_section (); - - break; - } - - /* Do basic-block profiling when we reach a new block. - Done here to avoid jump tables. */ - if (profile_block_flag && new_block) - add_bb (file); - - if (GET_CODE (body) == ASM_INPUT) - { - /* There's no telling what that did to the condition codes. */ - CC_STATUS_INIT; - if (prescan > 0) - break; - if (! app_on) - { - fprintf (file, ASM_APP_ON); - app_on = 1; - } - fprintf (asm_out_file, "\t%s\n", XSTR (body, 0)); - break; - } - - /* Detect `asm' construct with operands. */ - if (asm_noperands (body) >= 0) - { - int noperands = asm_noperands (body); - rtx *ops = (rtx *) alloca (noperands * sizeof (rtx)); - char *string; - - /* There's no telling what that did to the condition codes. */ - CC_STATUS_INIT; - if (prescan > 0) - break; - - if (! app_on) - { - fprintf (file, ASM_APP_ON); - app_on = 1; - } - - /* Get out the operand values. */ - string = decode_asm_operands (body, ops, NULL_PTR, - NULL_PTR, NULL_PTR); - /* Inhibit aborts on what would otherwise be compiler bugs. */ - insn_noperands = noperands; - this_is_asm_operands = insn; - - /* Output the insn using them. */ - output_asm_insn (string, ops); - this_is_asm_operands = 0; - break; - } - - if (prescan <= 0 && app_on) - { - fprintf (file, ASM_APP_OFF); - app_on = 0; - } - - if (GET_CODE (body) == SEQUENCE) - { - /* A delayed-branch sequence */ - register int i; - rtx next; - - if (prescan > 0) - break; - final_sequence = body; - - /* The first insn in this SEQUENCE might be a JUMP_INSN that will - force the restoration of a comparison that was previously - 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); - if (next != XVECEXP (body, 0, 1)) - { - final_sequence = 0; - return next; - } - - for (i = 1; i < XVECLEN (body, 0); i++) - final_scan_insn (XVECEXP (body, 0, i), file, 0, prescan, 1); -#ifdef DBR_OUTPUT_SEQEND - DBR_OUTPUT_SEQEND (file); -#endif - final_sequence = 0; - - /* If the insn requiring the delay slot was a CALL_INSN, the - insns in the delay slot are actually executed before the - called function. Hence we don't preserve any CC-setting - actions in these insns and the CC must be marked as being - clobbered by the function. */ - if (GET_CODE (XVECEXP (body, 0, 0)) == CALL_INSN) - CC_STATUS_INIT; - - /* Following a conditional branch sequence, we have a new basic - block. */ - if (profile_block_flag) - { - rtx insn = XVECEXP (body, 0, 0); - rtx body = PATTERN (insn); - - if ((GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == SET - && GET_CODE (SET_SRC (body)) != LABEL_REF) - || (GET_CODE (insn) == JUMP_INSN - && GET_CODE (body) == PARALLEL - && GET_CODE (XVECEXP (body, 0, 0)) == SET - && GET_CODE (SET_SRC (XVECEXP (body, 0, 0))) != LABEL_REF)) - new_block = 1; - } - break; - } - - /* We have a real machine instruction as rtl. */ - - body = PATTERN (insn); - -#ifdef HAVE_cc0 - /* Check for redundant test and compare instructions - (when the condition codes are already set up as desired). - This is done only when optimizing; if not optimizing, - it should be possible for the user to alter a variable - with the debugger in between statements - and the next statement should reexamine the variable - to compute the condition codes. */ - - if (optimize - && GET_CODE (body) == SET - && GET_CODE (SET_DEST (body)) == CC0 - && insn != last_ignored_compare) - { - if (GET_CODE (SET_SRC (body)) == SUBREG) - SET_SRC (body) = alter_subreg (SET_SRC (body)); - else if (GET_CODE (SET_SRC (body)) == COMPARE) - { - if (GET_CODE (XEXP (SET_SRC (body), 0)) == SUBREG) - XEXP (SET_SRC (body), 0) - = alter_subreg (XEXP (SET_SRC (body), 0)); - if (GET_CODE (XEXP (SET_SRC (body), 1)) == SUBREG) - XEXP (SET_SRC (body), 1) - = alter_subreg (XEXP (SET_SRC (body), 1)); - } - if ((cc_status.value1 != 0 - && rtx_equal_p (SET_SRC (body), cc_status.value1)) - || (cc_status.value2 != 0 - && rtx_equal_p (SET_SRC (body), cc_status.value2))) - { - /* Don't delete insn if it has an addressing side-effect. */ - if (! FIND_REG_INC_NOTE (insn, 0) - /* or if anything in it is volatile. */ - && ! volatile_refs_p (PATTERN (insn))) - { - /* We don't really delete the insn; just ignore it. */ - last_ignored_compare = insn; - break; - } - } - } -#endif - - /* Following a conditional branch, we have a new basic block. - But if we are inside a sequence, the new block starts after the - last insn of the sequence. */ - if (profile_block_flag && final_sequence == 0 - && ((GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == SET - && GET_CODE (SET_SRC (body)) != LABEL_REF) - || (GET_CODE (insn) == JUMP_INSN && GET_CODE (body) == PARALLEL - && GET_CODE (XVECEXP (body, 0, 0)) == SET - && GET_CODE (SET_SRC (XVECEXP (body, 0, 0))) != LABEL_REF))) - new_block = 1; - -#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 - && GET_CODE (insn) == INSN && GET_CODE (body) == SET - && GET_CODE (SET_SRC (body)) == REG - && GET_CODE (SET_DEST (body)) == REG - && 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 - 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 - && GET_CODE (insn) == JUMP_INSN - && GET_CODE (body) == SET - && SET_DEST (body) == pc_rtx - && GET_CODE (SET_SRC (body)) == IF_THEN_ELSE - /* This is done during prescan; it is not done again - in final scan when prescan has been done. */ - && prescan >= 0) - { - /* 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. */ - register int result = alter_cond (XEXP (SET_SRC (body), 0)); - /* If condition now has fixed value, replace the IF_THEN_ELSE - with its then-operand or its else-operand. */ - if (result == 1) - SET_SRC (body) = XEXP (SET_SRC (body), 1); - if (result == -1) - SET_SRC (body) = XEXP (SET_SRC (body), 2); - - /* The jump is now either unconditional or a no-op. - If it has become a no-op, don't try to output it. - (It would not be recognized.) */ - if (SET_SRC (body) == pc_rtx) - { - PUT_CODE (insn, NOTE); - NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; - NOTE_SOURCE_FILE (insn) = 0; - break; - } - else if (GET_CODE (SET_SRC (body)) == RETURN) - /* Replace (set (pc) (return)) with (return). */ - PATTERN (insn) = body = SET_SRC (body); - - /* 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 (if this machine has them). */ - - if (cc_status.flags != 0 - && GET_CODE (body) == SET) - { - switch (GET_CODE (SET_SRC (body))) - { - case GTU: - case GT: - case LTU: - case LT: - case GEU: - case GE: - case LEU: - case LE: - case EQ: - case NE: - { - register int result; - if (XEXP (SET_SRC (body), 0) != cc0_rtx) - break; - result = alter_cond (SET_SRC (body)); - if (result == 1) - validate_change (insn, &SET_SRC (body), const_true_rtx, 0); - else if (result == -1) - validate_change (insn, &SET_SRC (body), const0_rtx, 0); - else if (result == 2) - INSN_CODE (insn) = -1; - } - } - } -#endif - - /* Do machine-specific peephole optimizations if desired. */ - - if (optimize && !flag_no_peephole && !nopeepholes) - { - rtx next = peephole (insn); - /* When peepholing, if there were notes within the peephole, - emit them before the peephole. */ - if (next != 0 && next != NEXT_INSN (insn)) - { - rtx prev = PREV_INSN (insn); - rtx note; - - for (note = NEXT_INSN (insn); note != next; - note = NEXT_INSN (note)) - final_scan_insn (note, file, optimize, prescan, nopeepholes); - - /* In case this is prescan, put the notes - in proper position for later rescan. */ - note = NEXT_INSN (insn); - PREV_INSN (note) = prev; - NEXT_INSN (prev) = note; - NEXT_INSN (PREV_INSN (next)) = insn; - PREV_INSN (insn) = PREV_INSN (next); - NEXT_INSN (insn) = next; - PREV_INSN (next) = insn; - } - - /* PEEPHOLE might have changed this. */ - body = PATTERN (insn); - } - - /* Try to recognize the instruction. - If successful, verify that the operands satisfy the - constraints for the instruction. Crash if they don't, - since `reload' should have changed them so that they do. */ - - insn_code_number = recog_memoized (insn); - insn_extract (insn); - for (i = 0; i < insn_n_operands[insn_code_number]; i++) - { - if (GET_CODE (recog_operand[i]) == SUBREG) - recog_operand[i] = alter_subreg (recog_operand[i]); - else if (GET_CODE (recog_operand[i]) == PLUS - || GET_CODE (recog_operand[i]) == MULT) - recog_operand[i] = walk_alter_subreg (recog_operand[i]); - } - - for (i = 0; i < insn_n_dups[insn_code_number]; i++) - { - if (GET_CODE (*recog_dup_loc[i]) == SUBREG) - *recog_dup_loc[i] = alter_subreg (*recog_dup_loc[i]); - else if (GET_CODE (*recog_dup_loc[i]) == PLUS - || GET_CODE (*recog_dup_loc[i]) == MULT) - *recog_dup_loc[i] = walk_alter_subreg (*recog_dup_loc[i]); - } - -#ifdef REGISTER_CONSTRAINTS - if (! constrain_operands (insn_code_number, 1)) - fatal_insn_not_found (insn); -#endif - - /* Some target machines need to prescan each insn before - it is output. */ - -#ifdef FINAL_PRESCAN_INSN - FINAL_PRESCAN_INSN (insn, recog_operand, - insn_n_operands[insn_code_number]); -#endif - -#ifdef HAVE_cc0 - cc_prev_status = cc_status; - - /* Update `cc_status' for this instruction. - The instruction's output routine may change it further. - If the output routine for a jump insn needs to depend - on the cc status, it should look at cc_prev_status. */ - - NOTICE_UPDATE_CC (body, insn); -#endif - - debug_insn = insn; - - /* If the proper template needs to be chosen by some C code, - run that code and get the real template. */ - - template = insn_template[insn_code_number]; - if (template == 0) - { - template = (*insn_outfun[insn_code_number]) (recog_operand, insn); - - /* If the C code returns 0, it means that it is a jump insn - which follows a deleted test insn, and that test insn - needs to be reinserted. */ - if (template == 0) - { - if (prev_nonnote_insn (insn) != last_ignored_compare) - abort (); - new_block = 0; - return prev_nonnote_insn (insn); - } - } - - /* If the template is the string "#", it means that this insn must - be split. */ - if (template[0] == '#' && template[1] == '\0') - { - rtx new = try_split (body, insn, 0); - - /* If we didn't split the insn, go away. */ - if (new == insn && PATTERN (new) == body) - abort (); - - new_block = 0; - return new; - } - - if (prescan > 0) - break; - - /* Output assembler code from the template. */ - - output_asm_insn (template, recog_operand); - -#if 0 - /* It's not at all clear why we did this and doing so interferes - with tests we'd like to do to use REG_WAS_0 notes, so let's try - with this out. */ - - /* Mark this insn as having been output. */ - INSN_DELETED_P (insn) = 1; -#endif - - debug_insn = 0; - } - } - return NEXT_INSN (insn); -} - -/* Output debugging info to the assembler file FILE - based on the NOTE-insn INSN, assumed to be a line number. */ - -static void -output_source_line (file, insn) - FILE *file; - rtx insn; -{ - register char *filename = NOTE_SOURCE_FILE (insn); - - /* Remember filename for basic block profiling. - Filenames are allocated on the permanent obstack - or are passed in ARGV, so we don't have to save - the string. */ - - if (profile_block_flag && last_filename != filename) - bb_file_label_num = add_bb_string (filename, TRUE); - - last_filename = filename; - last_linenum = NOTE_LINE_NUMBER (insn); - - if (write_symbols != NO_DEBUG) - { -#ifdef SDB_DEBUGGING_INFO - if (write_symbols == SDB_DEBUG -#if 0 /* People like having line numbers even in wrong file! */ - /* COFF can't handle multiple source files--lose, lose. */ - && !strcmp (filename, main_input_filename) -#endif - /* COFF relative line numbers must be positive. */ - && last_linenum > sdb_begin_function_line) - { -#ifdef ASM_OUTPUT_SOURCE_LINE - ASM_OUTPUT_SOURCE_LINE (file, last_linenum); -#else - fprintf (file, "\t.ln\t%d\n", - ((sdb_begin_function_line > -1) - ? last_linenum - sdb_begin_function_line : 1)); -#endif - } -#endif - -#if defined (DBX_DEBUGGING_INFO) - if (write_symbols == DBX_DEBUG) - dbxout_source_line (file, filename, NOTE_LINE_NUMBER (insn)); -#endif - -#if defined (XCOFF_DEBUGGING_INFO) - if (write_symbols == XCOFF_DEBUG) - xcoffout_source_line (file, filename, insn); -#endif - -#ifdef DWARF_DEBUGGING_INFO - if (write_symbols == DWARF_DEBUG) - dwarfout_line (filename, NOTE_LINE_NUMBER (insn)); -#endif - } -} - -/* If X is a SUBREG, replace it with a REG or a MEM, - based on the thing it is a subreg of. */ - -rtx -alter_subreg (x) - register rtx x; -{ - register rtx y = SUBREG_REG (x); - if (GET_CODE (y) == SUBREG) - y = alter_subreg (y); - - if (GET_CODE (y) == REG) - { - /* If the containing reg really gets a hard reg, so do we. */ - PUT_CODE (x, REG); - REGNO (x) = REGNO (y) + SUBREG_WORD (x); - } - else if (GET_CODE (y) == MEM) - { - register int offset = SUBREG_WORD (x) * UNITS_PER_WORD; -#if BYTES_BIG_ENDIAN - offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x))) - - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (y)))); -#endif - PUT_CODE (x, MEM); - MEM_VOLATILE_P (x) = MEM_VOLATILE_P (y); - XEXP (x, 0) = plus_constant (XEXP (y, 0), offset); - } - - return x; -} - -/* Do alter_subreg on all the SUBREGs contained in X. */ - -static rtx -walk_alter_subreg (x) - rtx x; -{ - switch (GET_CODE (x)) - { - case PLUS: - case MULT: - XEXP (x, 0) = walk_alter_subreg (XEXP (x, 0)); - XEXP (x, 1) = walk_alter_subreg (XEXP (x, 1)); - break; - - case MEM: - XEXP (x, 0) = walk_alter_subreg (XEXP (x, 0)); - break; - - case SUBREG: - return alter_subreg (x); - } - - return x; -} - -#ifdef HAVE_cc0 - -/* Given BODY, the body of a jump instruction, alter the jump condition - as required by the bits that are set in cc_status.flags. - Not all of the bits there can be handled at this level in all cases. - - The value is normally 0. - 1 means that the condition has become always true. - -1 means that the condition has become always false. - 2 means that COND has been altered. */ - -static int -alter_cond (cond) - register rtx cond; -{ - int value = 0; - - if (cc_status.flags & CC_REVERSED) - { - value = 2; - PUT_CODE (cond, swap_condition (GET_CODE (cond))); - } - - if (cc_status.flags & CC_INVERTED) - { - value = 2; - PUT_CODE (cond, reverse_condition (GET_CODE (cond))); - } - - if (cc_status.flags & CC_NOT_POSITIVE) - switch (GET_CODE (cond)) - { - case LE: - case LEU: - case GEU: - /* Jump becomes unconditional. */ - return 1; - - case GT: - case GTU: - case LTU: - /* Jump becomes no-op. */ - return -1; - - case GE: - PUT_CODE (cond, EQ); - value = 2; - break; - - case LT: - PUT_CODE (cond, NE); - value = 2; - break; - } - - if (cc_status.flags & CC_NOT_NEGATIVE) - switch (GET_CODE (cond)) - { - case GE: - case GEU: - /* Jump becomes unconditional. */ - return 1; - - case LT: - case LTU: - /* Jump becomes no-op. */ - return -1; - - case LE: - case LEU: - PUT_CODE (cond, EQ); - value = 2; - break; - - case GT: - case GTU: - PUT_CODE (cond, NE); - value = 2; - break; - } - - if (cc_status.flags & CC_NO_OVERFLOW) - switch (GET_CODE (cond)) - { - case GEU: - /* Jump becomes unconditional. */ - return 1; - - case LEU: - PUT_CODE (cond, EQ); - value = 2; - break; - - case GTU: - PUT_CODE (cond, NE); - value = 2; - break; - - case LTU: - /* Jump becomes no-op. */ - return -1; - } - - if (cc_status.flags & (CC_Z_IN_NOT_N | CC_Z_IN_N)) - switch (GET_CODE (cond)) - { - case LE: - case LEU: - case GE: - case GEU: - case LT: - case LTU: - case GT: - case GTU: - abort (); - - case NE: - PUT_CODE (cond, cc_status.flags & CC_Z_IN_N ? GE : LT); - value = 2; - break; - - case EQ: - PUT_CODE (cond, cc_status.flags & CC_Z_IN_N ? LT : GE); - value = 2; - break; - } - - if (cc_status.flags & CC_NOT_SIGNED) - /* The flags are valid if signed condition operators are converted - to unsigned. */ - switch (GET_CODE (cond)) - { - case LE: - PUT_CODE (cond, LEU); - value = 2; - break; - - case LT: - PUT_CODE (cond, LTU); - value = 2; - break; - - case GT: - PUT_CODE (cond, GTU); - value = 2; - break; - - case GE: - PUT_CODE (cond, GEU); - value = 2; - break; - } - - return value; -} -#endif - -/* Report inconsistency between the assembler template and the operands. - In an `asm', it's the user's fault; otherwise, the compiler's fault. */ - -void -output_operand_lossage (str) - char *str; -{ - if (this_is_asm_operands) - error_for_asm (this_is_asm_operands, "invalid `asm': %s", str); - else - abort (); -} - -/* Output of assembler code from a template, and its subroutines. */ - -/* Output text from TEMPLATE to the assembler output file, - obeying %-directions to substitute operands taken from - the vector OPERANDS. - - %N (for N a digit) means print operand N in usual manner. - %lN means require operand N to be a CODE_LABEL or LABEL_REF - and print the label name with no punctuation. - %cN means require operand N to be a constant - and print the constant expression with no punctuation. - %aN means expect operand N to be a memory address - (not a memory reference!) and print a reference - to that address. - %nN means expect operand N to be a constant - and print a constant expression for minus the value - of the operand, with no other punctuation. */ - -void -output_asm_insn (template, operands) - char *template; - rtx *operands; -{ - register char *p; - register int c, i; - - /* An insn may return a null string template - in a case where no assembler code is needed. */ - if (*template == 0) - return; - - p = template; - putc ('\t', asm_out_file); - -#ifdef ASM_OUTPUT_OPCODE - ASM_OUTPUT_OPCODE (asm_out_file, p); -#endif - - while (c = *p++) - switch (c) - { -#ifdef ASM_OUTPUT_OPCODE - case '\n': - putc (c, asm_out_file); - while ((c = *p) == '\t') - { - putc (c, asm_out_file); - p++; - } - ASM_OUTPUT_OPCODE (asm_out_file, p); - break; -#endif - -#ifdef ASSEMBLER_DIALECT - case '{': - /* If we want the first dialect, do nothing. Otherwise, skip - DIALECT_NUMBER of strings ending with '|'. */ - for (i = 0; i < dialect_number; i++) - { - while (*p && *p++ != '|') - ; - - if (*p == '|') - p++; - } - break; - - case '|': - /* Skip to close brace. */ - while (*p && *p++ != '}') - ; - break; - - case '}': - break; -#endif - - case '%': - /* %% outputs a single %. */ - if (*p == '%') - { - p++; - putc (c, asm_out_file); - } - /* %= outputs a number which is unique to each insn in the entire - compilation. This is useful for making local labels that are - referred to more than once in a given insn. */ - else if (*p == '=') - { - p++; - fprintf (asm_out_file, "%d", insn_counter); - } - /* % followed by a letter and some digits - outputs an operand in a special way depending on the letter. - Letters `acln' are implemented directly. - Other letters are passed to `output_operand' so that - the PRINT_OPERAND macro can define them. */ - else if ((*p >= 'a' && *p <= 'z') - || (*p >= 'A' && *p <= 'Z')) - { - int letter = *p++; - c = atoi (p); - - if (! (*p >= '0' && *p <= '9')) - output_operand_lossage ("operand number missing after %-letter"); - else if (this_is_asm_operands && c >= (unsigned) insn_noperands) - output_operand_lossage ("operand number out of range"); - else if (letter == 'l') - output_asm_label (operands[c]); - else if (letter == 'a') - output_address (operands[c]); - else if (letter == 'c') - { - if (CONSTANT_ADDRESS_P (operands[c])) - output_addr_const (asm_out_file, operands[c]); - else - output_operand (operands[c], 'c'); - } - else if (letter == 'n') - { - if (GET_CODE (operands[c]) == CONST_INT) - fprintf (asm_out_file, -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT - "%d", -#else - "%ld", -#endif - - INTVAL (operands[c])); - else - { - putc ('-', asm_out_file); - output_addr_const (asm_out_file, operands[c]); - } - } - else - output_operand (operands[c], letter); - - while ((c = *p) >= '0' && c <= '9') p++; - } - /* % followed by a digit outputs an operand the default way. */ - else if (*p >= '0' && *p <= '9') - { - c = atoi (p); - if (this_is_asm_operands && c >= (unsigned) insn_noperands) - output_operand_lossage ("operand number out of range"); - else - output_operand (operands[c], 0); - while ((c = *p) >= '0' && c <= '9') p++; - } - /* % followed by punctuation: output something for that - punctuation character alone, with no operand. - The PRINT_OPERAND macro decides what is actually done. */ -#ifdef PRINT_OPERAND_PUNCT_VALID_P - else if (PRINT_OPERAND_PUNCT_VALID_P (*p)) - output_operand (NULL_RTX, *p++); -#endif - else - output_operand_lossage ("invalid %%-code"); - break; - - default: - putc (c, asm_out_file); - } - - if (flag_print_asm_name) - { - /* Annotate the assembly with a comment describing the pattern and - alternative used. */ - if (debug_insn) - { - register int num = INSN_CODE (debug_insn); - fprintf (asm_out_file, " %s %d %s", - ASM_COMMENT_START, INSN_UID (debug_insn), insn_name[num]); - if (insn_n_alternatives[num] > 1) - fprintf (asm_out_file, "/%d", which_alternative + 1); - - /* Clear this so only the first assembler insn - of any rtl insn will get the special comment for -dp. */ - debug_insn = 0; - } - } - - putc ('\n', asm_out_file); -} - -/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */ - -void -output_asm_label (x) - rtx x; -{ - char buf[256]; - - if (GET_CODE (x) == LABEL_REF) - ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (XEXP (x, 0))); - else if (GET_CODE (x) == CODE_LABEL) - ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x)); - else - output_operand_lossage ("`%l' operand isn't a label"); - - assemble_name (asm_out_file, buf); -} - -/* 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, - such as 'z' if the spec was `%z3'. CODE is 0 if there was no char - between the % and the digits. - When CODE is a non-letter, X is 0. - - The meanings of the letters are machine-dependent and controlled - by PRINT_OPERAND. */ - -static void -output_operand (x, code) - rtx x; - int code; -{ - if (x && GET_CODE (x) == SUBREG) - x = alter_subreg (x); - - /* If X is a pseudo-register, abort now rather than writing trash to the - assembler file. */ - - if (x && GET_CODE (x) == REG && REGNO (x) >= FIRST_PSEUDO_REGISTER) - abort (); - - PRINT_OPERAND (asm_out_file, x, code); -} - -/* Print a memory reference operand for address X - using machine-dependent assembler syntax. - The macro PRINT_OPERAND_ADDRESS exists just to control this function. */ - -void -output_address (x) - rtx x; -{ - walk_alter_subreg (x); - PRINT_OPERAND_ADDRESS (asm_out_file, x); -} - -/* Print an integer constant expression in assembler syntax. - Addition and subtraction are the only arithmetic - that may appear in these expressions. */ - -void -output_addr_const (file, x) - FILE *file; - rtx x; -{ - char buf[256]; - - restart: - switch (GET_CODE (x)) - { - case PC: - if (flag_pic) - putc ('.', file); - else - abort (); - break; - - case SYMBOL_REF: - assemble_name (file, XSTR (x, 0)); - break; - - case LABEL_REF: - ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (XEXP (x, 0))); - assemble_name (file, buf); - break; - - case CODE_LABEL: - ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x)); - assemble_name (file, buf); - break; - - case CONST_INT: - fprintf (file, -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT - "%d", -#else - "%ld", -#endif - INTVAL (x)); - break; - - case CONST: - /* This used to output parentheses around the expression, - but that does not work on the 386 (either ATT or BSD assembler). */ - output_addr_const (file, XEXP (x, 0)); - break; - - case CONST_DOUBLE: - if (GET_MODE (x) == VOIDmode) - { - /* We can use %d if the number is one word and positive. */ - if (CONST_DOUBLE_HIGH (x)) - fprintf (file, -#if HOST_BITS_PER_WIDE_INT == 64 -#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT - "0x%lx%016lx", -#else - "0x%x%016x", -#endif -#else -#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT - "0x%lx%08lx", -#else - "0x%x%08x", -#endif -#endif - CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x)); - else if (CONST_DOUBLE_LOW (x) < 0) - fprintf (file, -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT - "0x%x", -#else - "0x%lx", -#endif - CONST_DOUBLE_LOW (x)); - else - fprintf (file, -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT - "%d", -#else - "%ld", -#endif - CONST_DOUBLE_LOW (x)); - } - else - /* We can't handle floating point constants; - PRINT_OPERAND must handle them. */ - output_operand_lossage ("floating constant misused"); - break; - - case PLUS: - /* Some assemblers need integer constants to appear last (eg masm). */ - if (GET_CODE (XEXP (x, 0)) == CONST_INT) - { - output_addr_const (file, XEXP (x, 1)); - if (INTVAL (XEXP (x, 0)) >= 0) - fprintf (file, "+"); - output_addr_const (file, XEXP (x, 0)); - } - else - { - output_addr_const (file, XEXP (x, 0)); - if (INTVAL (XEXP (x, 1)) >= 0) - fprintf (file, "+"); - output_addr_const (file, XEXP (x, 1)); - } - break; - - case MINUS: - /* Avoid outputting things like x-x or x+5-x, - since some assemblers can't handle that. */ - x = simplify_subtraction (x); - if (GET_CODE (x) != MINUS) - goto restart; - - output_addr_const (file, XEXP (x, 0)); - fprintf (file, "-"); - if (GET_CODE (XEXP (x, 1)) == CONST_INT - && INTVAL (XEXP (x, 1)) < 0) - { - fprintf (file, ASM_OPEN_PAREN); - output_addr_const (file, XEXP (x, 1)); - fprintf (file, ASM_CLOSE_PAREN); - } - else - output_addr_const (file, XEXP (x, 1)); - break; - - case ZERO_EXTEND: - case SIGN_EXTEND: - output_addr_const (file, XEXP (x, 0)); - break; - - default: - output_operand_lossage ("invalid expression as operand"); - } -} - -/* A poor man's fprintf, with the added features of %I, %R, %L, and %U. - %R prints the value of REGISTER_PREFIX. - %L prints the value of LOCAL_LABEL_PREFIX. - %U prints the value of USER_LABEL_PREFIX. - %I prints the value of IMMEDIATE_PREFIX. - %O runs ASM_OUTPUT_OPCODE to transform what follows in the string. - Also supported are %d, %x, %s, %e, %f, %g and %%. - - We handle alternate assembler dialects here, just like output_asm_insn. */ - -void -asm_fprintf VPROTO((FILE *file, char *p, ...)) -{ -#ifndef __STDC__ - FILE *file; - char *p; -#endif - va_list argptr; - char buf[10]; - char *q, c; - int i; - - VA_START (argptr, p); - -#ifndef __STDC__ - file = va_arg (argptr, FILE*); - p = va_arg (argptr, char*); -#endif - - buf[0] = '%'; - - while (c = *p++) - switch (c) - { -#ifdef ASSEMBLER_DIALECT - case '{': - /* If we want the first dialect, do nothing. Otherwise, skip - DIALECT_NUMBER of strings ending with '|'. */ - for (i = 0; i < dialect_number; i++) - { - while (*p && *p++ != '|') - ; - - if (*p == '|') - p++; - } - break; - - case '|': - /* Skip to close brace. */ - while (*p && *p++ != '}') - ; - break; - - case '}': - break; -#endif - - case '%': - c = *p++; - q = &buf[1]; - while ((c >= '0' && c <= '9') || c == '.') - { - *q++ = c; - c = *p++; - } - switch (c) - { - case '%': - fprintf (file, "%%"); - break; - - case 'd': case 'i': case 'u': - case 'x': case 'p': case 'X': - case 'o': - *q++ = c; - *q = 0; - fprintf (file, buf, va_arg (argptr, int)); - break; - - case 'w': - /* This is a prefix to the 'd', 'i', 'u', 'x', 'p', and 'X' cases, - but we do not check for those cases. It means that the value - is a HOST_WIDE_INT, which may be either `int' or `long'. */ - -#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT - *q++ = 'l'; -#endif - - *q++ = *p++; - *q = 0; - fprintf (file, buf, va_arg (argptr, HOST_WIDE_INT)); - break; - - case 'l': - *q++ = c; - *q++ = *p++; - *q = 0; - fprintf (file, buf, va_arg (argptr, long)); - break; - - case 'e': - case 'f': - case 'g': - *q++ = c; - *q = 0; - fprintf (file, buf, va_arg (argptr, double)); - break; - - case 's': - *q++ = c; - *q = 0; - fprintf (file, buf, va_arg (argptr, char *)); - break; - - case 'O': -#ifdef ASM_OUTPUT_OPCODE - ASM_OUTPUT_OPCODE (asm_out_file, p); -#endif - break; - - case 'R': -#ifdef REGISTER_PREFIX - fprintf (file, "%s", REGISTER_PREFIX); -#endif - break; - - case 'I': -#ifdef IMMEDIATE_PREFIX - fprintf (file, "%s", IMMEDIATE_PREFIX); -#endif - break; - - case 'L': -#ifdef LOCAL_LABEL_PREFIX - fprintf (file, "%s", LOCAL_LABEL_PREFIX); -#endif - break; - - case 'U': -#ifdef USER_LABEL_PREFIX - fprintf (file, "%s", USER_LABEL_PREFIX); -#endif - break; - - default: - abort (); - } - break; - - default: - fputc (c, file); - } -} - -/* Split up a CONST_DOUBLE or integer constant rtx - into two rtx's for single words, - storing in *FIRST the word that comes first in memory in the target - and in *SECOND the other. */ - -void -split_double (value, first, second) - rtx value; - rtx *first, *second; -{ - if (GET_CODE (value) == CONST_INT) - { - /* The rule for using CONST_INT for a wider mode - is that we regard the value as signed. - So sign-extend it. */ - rtx high = (INTVAL (value) < 0 ? constm1_rtx : const0_rtx); -#if WORDS_BIG_ENDIAN - *first = high; - *second = value; -#else - *first = value; - *second = high; -#endif - } - else if (GET_CODE (value) != CONST_DOUBLE) - { -#if WORDS_BIG_ENDIAN - *first = const0_rtx; - *second = value; -#else - *first = value; - *second = const0_rtx; -#endif - } - else if (GET_MODE (value) == VOIDmode - /* This is the old way we did CONST_DOUBLE integers. */ - || GET_MODE_CLASS (GET_MODE (value)) == MODE_INT) - { - /* In an integer, the words are defined as most and least significant. - So order them by the target's convention. */ -#if WORDS_BIG_ENDIAN - *first = GEN_INT (CONST_DOUBLE_HIGH (value)); - *second = GEN_INT (CONST_DOUBLE_LOW (value)); -#else - *first = GEN_INT (CONST_DOUBLE_LOW (value)); - *second = GEN_INT (CONST_DOUBLE_HIGH (value)); -#endif - } - else - { -#ifdef REAL_ARITHMETIC - REAL_VALUE_TYPE r; long l[2]; - REAL_VALUE_FROM_CONST_DOUBLE (r, value); - - /* Note, this converts the REAL_VALUE_TYPE to the target's - format, splits up the floating point double and outputs - exactly 32 bits of it into each of l[0] and l[1] -- - not necessarily BITS_PER_WORD bits. */ - REAL_VALUE_TO_TARGET_DOUBLE (r, l); - - *first = GEN_INT ((HOST_WIDE_INT) l[0]); - *second = GEN_INT ((HOST_WIDE_INT) l[1]); -#else - if ((HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT - || HOST_BITS_PER_WIDE_INT != BITS_PER_WORD) - && ! flag_pretend_float) - abort (); - -#if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN - /* Host and target agree => no need to swap. */ - *first = GEN_INT (CONST_DOUBLE_LOW (value)); - *second = GEN_INT (CONST_DOUBLE_HIGH (value)); -#else - *second = GEN_INT (CONST_DOUBLE_LOW (value)); - *first = GEN_INT (CONST_DOUBLE_HIGH (value)); -#endif -#endif /* no REAL_ARITHMETIC */ - } -} - -/* Return nonzero if this function has no function calls. */ - -int -leaf_function_p () -{ - rtx insn; - - if (profile_flag || profile_block_flag) - return 0; - - for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) - { - if (GET_CODE (insn) == CALL_INSN) - return 0; - if (GET_CODE (insn) == INSN - && GET_CODE (PATTERN (insn)) == SEQUENCE - && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == CALL_INSN) - return 0; - } - for (insn = current_function_epilogue_delay_list; insn; insn = XEXP (insn, 1)) - { - if (GET_CODE (XEXP (insn, 0)) == CALL_INSN) - return 0; - if (GET_CODE (XEXP (insn, 0)) == INSN - && GET_CODE (PATTERN (XEXP (insn, 0))) == SEQUENCE - && GET_CODE (XVECEXP (PATTERN (XEXP (insn, 0)), 0, 0)) == CALL_INSN) - return 0; - } - - return 1; -} - -/* On some machines, a function with no call insns - can run faster if it doesn't create its own register window. - When output, the leaf function should use only the "output" - registers. Ordinarily, the function would be compiled to use - the "input" registers to find its arguments; it is a candidate - for leaf treatment if it uses only the "input" registers. - Leaf function treatment means renumbering so the function - uses the "output" registers instead. */ - -#ifdef LEAF_REGISTERS - -static char permitted_reg_in_leaf_functions[] = LEAF_REGISTERS; - -/* Return 1 if this function uses only the registers that can be - safely renumbered. */ - -int -only_leaf_regs_used () -{ - int i; - - for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) - { - if ((regs_ever_live[i] || global_regs[i]) - && ! permitted_reg_in_leaf_functions[i]) - return 0; - } - return 1; -} - -/* Scan all instructions and renumber all registers into those - available in leaf functions. */ - -static void -leaf_renumber_regs (first) - rtx first; -{ - rtx insn; - - /* Renumber only the actual patterns. - The reg-notes can contain frame pointer refs, - and renumbering them could crash, and should not be needed. */ - for (insn = first; insn; insn = NEXT_INSN (insn)) - if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') - leaf_renumber_regs_insn (PATTERN (insn)); - for (insn = current_function_epilogue_delay_list; insn; insn = XEXP (insn, 1)) - if (GET_RTX_CLASS (GET_CODE (XEXP (insn, 0))) == 'i') - leaf_renumber_regs_insn (PATTERN (XEXP (insn, 0))); -} - -/* Scan IN_RTX and its subexpressions, and renumber all regs into those - available in leaf functions. */ - -void -leaf_renumber_regs_insn (in_rtx) - register rtx in_rtx; -{ - register int i, j; - register char *format_ptr; - - if (in_rtx == 0) - return; - - /* Renumber all input-registers into output-registers. - renumbered_regs would be 1 for an output-register; - they */ - - if (GET_CODE (in_rtx) == REG) - { - int newreg; - - /* Don't renumber the same reg twice. */ - if (in_rtx->used) - return; - - newreg = REGNO (in_rtx); - /* Don't try to renumber pseudo regs. It is possible for a pseudo reg - to reach here as part of a REG_NOTE. */ - if (newreg >= FIRST_PSEUDO_REGISTER) - { - in_rtx->used = 1; - return; - } - newreg = LEAF_REG_REMAP (newreg); - if (newreg < 0) - abort (); - regs_ever_live[REGNO (in_rtx)] = 0; - regs_ever_live[newreg] = 1; - REGNO (in_rtx) = newreg; - in_rtx->used = 1; - } - - if (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i') - { - /* Inside a SEQUENCE, we find insns. - Renumber just the patterns of these insns, - just as we do for the top-level insns. */ - leaf_renumber_regs_insn (PATTERN (in_rtx)); - return; - } - - format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)); - - for (i = 0; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++) - switch (*format_ptr++) - { - case 'e': - leaf_renumber_regs_insn (XEXP (in_rtx, i)); - break; - - case 'E': - if (NULL != XVEC (in_rtx, i)) - { - for (j = 0; j < XVECLEN (in_rtx, i); j++) - leaf_renumber_regs_insn (XVECEXP (in_rtx, i, j)); - } - break; - - case 'S': - case 's': - case '0': - case 'i': - case 'w': - case 'n': - case 'u': - break; - - default: - abort (); - } -} -#endif -- 2.7.4