/* Top level of GCC compilers (cc1, cc1plus, etc.)
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
#include "intl.h"
#include "ggc.h"
#include "graph.h"
-#include "loop.h"
#include "regs.h"
#include "timevar.h"
#include "diagnostic.h"
#include "value-prof.h"
#include "alloc-pool.h"
#include "tree-pass.h"
+#include "tree-dump.h"
#if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
#include "dwarf2out.h"
#define DUMPFILE_FORMAT ".%02d."
#endif
-/* Describes a dump file. */
-
-struct dump_file_info
-{
- /* The unique extension to apply, e.g. ".jump". */
- const char *const extension;
-
- /* The -d<c> character that enables this dump file. */
- char const debug_switch;
-
- /* True if there is a corresponding graph dump file. */
- char const graph_dump_p;
-
- /* True if the user selected this dump. */
- char enabled;
-
- /* True if the files have been initialized (ie truncated). */
- char initialized;
-};
-
-/* Enumerate the extant dump files. */
-
-enum dump_file_index
-{
- DFI_cgraph,
- DFI_rtl,
- DFI_sibling,
- DFI_eh,
- DFI_jump,
- DFI_null,
- DFI_cse,
- DFI_gcse,
- DFI_loop,
- DFI_bypass,
- DFI_cfg,
- DFI_bp,
- DFI_vpt,
- DFI_ce1,
- DFI_tracer,
- DFI_loop2,
- DFI_web,
- DFI_cse2,
- DFI_life,
- DFI_combine,
- DFI_ce2,
- DFI_regmove,
- DFI_sms,
- DFI_sched,
- DFI_lreg,
- DFI_greg,
- DFI_postreload,
- DFI_gcse2,
- DFI_flow2,
- DFI_peephole2,
- DFI_ce3,
- DFI_rnreg,
- DFI_bbro,
- DFI_branch_target_load,
- DFI_sched2,
- DFI_stack,
- DFI_vartrack,
- DFI_mach,
- DFI_dbr,
- DFI_MAX
-};
-
-/* Describes all the dump files. Should be kept in order of the
- pass and in sync with dump_file_index above.
-
- Remaining -d letters:
-
- " e q "
- " F K O Q WXY "
-*/
-
-static struct dump_file_info dump_file_tbl[DFI_MAX] =
-{
- { "cgraph", 'U', 0, 0, 0 },
- { "rtl", 'r', 0, 0, 0 },
- { "sibling", 'i', 0, 0, 0 },
- { "eh", 'h', 0, 0, 0 },
- { "jump", 'j', 0, 0, 0 },
- { "null", 'u', 0, 0, 0 },
- { "cse", 's', 0, 0, 0 },
- { "gcse", 'G', 1, 0, 0 },
- { "loop", 'L', 1, 0, 0 },
- { "bypass", 'G', 1, 0, 0 }, /* Yes, duplicate enable switch. */
- { "cfg", 'f', 1, 0, 0 },
- { "bp", 'b', 1, 0, 0 },
- { "vpt", 'V', 1, 0, 0 },
- { "ce1", 'C', 1, 0, 0 },
- { "tracer", 'T', 1, 0, 0 },
- { "loop2", 'L', 1, 0, 0 },
- { "web", 'Z', 0, 0, 0 },
- { "cse2", 't', 1, 0, 0 },
- { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
- { "combine", 'c', 1, 0, 0 },
- { "ce2", 'C', 1, 0, 0 },
- { "regmove", 'N', 1, 0, 0 },
- { "sms", 'm', 0, 0, 0 },
- { "sched", 'S', 1, 0, 0 },
- { "lreg", 'l', 1, 0, 0 },
- { "greg", 'g', 1, 0, 0 },
- { "postreload", 'o', 1, 0, 0 },
- { "gcse2", 'J', 0, 0, 0 },
- { "flow2", 'w', 1, 0, 0 },
- { "peephole2", 'z', 1, 0, 0 },
- { "ce3", 'E', 1, 0, 0 },
- { "rnreg", 'n', 1, 0, 0 },
- { "bbro", 'B', 1, 0, 0 },
- { "btl", 'd', 1, 0, 0 }, /* Yes, duplicate enable switch. */
- { "sched2", 'R', 1, 0, 0 },
- { "stack", 'k', 1, 0, 0 },
- { "vartrack", 'V', 1, 0, 0 }, /* Yes, duplicate enable switch. */
- { "mach", 'M', 1, 0, 0 },
- { "dbr", 'd', 0, 0, 0 },
-};
+static int initializing_dump = 0;
/* Routine to open a dump file. Return true if the dump file is enabled. */
static int
-open_dump_file (enum dump_file_index index, tree decl)
+open_dump_file (enum tree_dump_index index, tree decl)
{
- char *dump_name;
- const char *open_arg;
- char seq[16];
-
- if (! dump_file_tbl[index].enabled)
+ if (! dump_enabled_p (index))
return 0;
timevar_push (TV_DUMP);
- if (dump_file != NULL)
- fclose (dump_file);
- sprintf (seq, DUMPFILE_FORMAT, index);
+ if (dump_file != NULL || dump_file_name != NULL)
+ abort ();
- if (! dump_file_tbl[index].initialized)
- {
- /* If we've not initialized the files, do so now. */
- if (graph_dump_format != no_graph
- && dump_file_tbl[index].graph_dump_p)
- {
- dump_name = concat (seq, dump_file_tbl[index].extension, NULL);
- clean_graph_dump_file (dump_base_name, dump_name);
- free (dump_name);
- }
- dump_file_tbl[index].initialized = 1;
- open_arg = "w";
- }
- else
- open_arg = "a";
-
- dump_name = concat (dump_base_name, seq,
- dump_file_tbl[index].extension, NULL);
+ dump_file_name = get_dump_file_name (index);
+ initializing_dump = !dump_initialized_p (index);
+ dump_file = dump_begin (index, NULL);
- dump_file = fopen (dump_name, open_arg);
if (dump_file == NULL)
- fatal_error ("can't open %s: %m", dump_name);
-
- free (dump_name);
+ fatal_error ("can't open %s: %m", dump_file_name);
if (decl)
fprintf (dump_file, "\n;; Function %s%s\n\n",
/* Routine to close a dump file. */
static void
-close_dump_file (enum dump_file_index index,
+close_dump_file (enum tree_dump_index index,
void (*func) (FILE *, rtx),
rtx insns)
{
timevar_push (TV_DUMP);
if (insns
- && graph_dump_format != no_graph
- && dump_file_tbl[index].graph_dump_p)
+ && graph_dump_format != no_graph)
{
- char seq[16];
- char *suffix;
+ /* If we've not initialized the files, do so now. */
+ if (initializing_dump)
+ clean_graph_dump_file (dump_file_name);
- sprintf (seq, DUMPFILE_FORMAT, index);
- suffix = concat (seq, dump_file_tbl[index].extension, NULL);
- print_rtl_graph_with_bb (dump_base_name, suffix, insns);
- free (suffix);
+ print_rtl_graph_with_bb (dump_file_name, insns);
}
if (func && insns)
func (dump_file, insns);
- fflush (dump_file);
- fclose (dump_file);
+ dump_end (index, dump_file);
+ free ((char *) dump_file_name);
dump_file = NULL;
+ dump_file_name = NULL;
timevar_pop (TV_DUMP);
}
and TYPE_DECL nodes.
This does nothing for local (non-static) variables, unless the
- variable is a register variable with an ASMSPEC. In that case, or
- if the variable is not an automatic, it sets up the RTL and
- outputs any assembler code (label definition, storage allocation
- and initialization).
+ variable is a register variable with DECL_ASSEMBLER_NAME set. In
+ that case, or if the variable is not an automatic, it sets up the
+ RTL and outputs any assembler code (label definition, storage
+ allocation and initialization).
- DECL is the declaration. If ASMSPEC is nonzero, it specifies
- the assembler symbol name to be used. TOP_LEVEL is nonzero
+ DECL is the declaration. TOP_LEVEL is nonzero
if this declaration is not within a function. */
void
rest_of_decl_compilation (tree decl,
- const char *asmspec,
int top_level,
int at_end)
{
}
}
+ /* Can't defer this, because it needs to happen before any
+ later function definitions are processed. */
+ if (DECL_REGISTER (decl) && DECL_ASSEMBLER_NAME_SET_P (decl))
+ make_decl_rtl (decl);
+
/* Forward declarations for nested functions are not "external",
but we need to treat them as if they were. */
if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
{
timevar_push (TV_VARCONST);
- if (asmspec)
- make_decl_rtl (decl, asmspec);
-
/* Don't output anything when a tentative file-scope definition
is seen. But at end of compilation, do output code for them.
&& !DECL_EXTERNAL (decl))
{
if (flag_unit_at_a_time && !cgraph_global_info_ready
- && TREE_CODE (decl) != FUNCTION_DECL && top_level
- /* If we defer processing of decls that have had their
- DECL_RTL set above (say, in make_decl_rtl),
- check_global_declarations() will clear it before
- assemble_variable has a chance to act on it. This
- would remove all traces of the register name in a
- global register variable, for example. */
- && !DECL_RTL_SET_P (decl))
+ && TREE_CODE (decl) != FUNCTION_DECL && top_level)
cgraph_varpool_finalize_decl (decl);
else
assemble_variable (decl, top_level, at_end, 0);
timevar_pop (TV_VARCONST);
}
- else if (DECL_REGISTER (decl) && asmspec != 0)
- {
- if (decode_reg_name (asmspec) >= 0)
- {
- SET_DECL_RTL (decl, NULL_RTX);
- make_decl_rtl (decl, asmspec);
- }
- else
- {
- error ("%Hinvalid register name `%s' for register variable",
- &DECL_SOURCE_LOCATION (decl), asmspec);
- DECL_REGISTER (decl) = 0;
- if (!top_level)
- expand_decl (decl);
- }
- }
else if (TREE_CODE (decl) == TYPE_DECL)
{
timevar_push (TV_SYMOUT);
output_function_exception_table ();
#endif
+ user_defined_section_attribute = false;
+
if (! quiet_flag)
fflush (asm_out_file);
/* Release all memory allocated by flow. */
free_basic_block_vars ();
-
- /* Release all memory held by regsets now. */
- regset_release_memory ();
}
/* Write DBX symbols if requested. */
}
#endif
-/* Track the variables, ie. compute where the variable is stored at each position in function. */
+/* Track the variables, i.e. compute where the variable is stored at each position in function. */
static void
rest_of_handle_variable_tracking (void)
{
}
-/* Run new register allocator. Return TRUE if we must exit
- rest_of_compilation upon return. */
-static bool
-rest_of_handle_new_regalloc (void)
-{
- int failure;
-
- timevar_push (TV_LOCAL_ALLOC);
- open_dump_file (DFI_lreg, current_function_decl);
-
- delete_trivially_dead_insns (get_insns (), max_reg_num ());
- reg_alloc ();
-
- timevar_pop (TV_LOCAL_ALLOC);
- close_dump_file (DFI_lreg, NULL, NULL);
-
- /* XXX clean up the whole mess to bring live info in shape again. */
- timevar_push (TV_GLOBAL_ALLOC);
- open_dump_file (DFI_greg, current_function_decl);
-
- build_insn_chain (get_insns ());
- failure = reload (get_insns (), 0);
-
- timevar_pop (TV_GLOBAL_ALLOC);
-
- ggc_collect ();
-
- if (dump_file_tbl[DFI_greg].enabled)
- {
- timevar_push (TV_DUMP);
- dump_global_regs (dump_file);
- timevar_pop (TV_DUMP);
- close_dump_file (DFI_greg, print_rtl_with_bb, get_insns ());
- }
-
- if (failure)
- return true;
-
- reload_completed = 1;
-
- return false;
-}
-
/* Run old register allocator. Return TRUE if we must exit
rest_of_compilation upon return. */
static bool
rebuild_jump_labels (get_insns ());
purge_all_dead_edges (0);
+ delete_unreachable_blocks ();
timevar_pop (TV_JUMP);
}
- if (dump_file_tbl[DFI_lreg].enabled)
+ if (dump_enabled_p (DFI_lreg))
{
timevar_push (TV_DUMP);
dump_flow_info (dump_file);
failure = reload (get_insns (), 0);
}
- if (dump_file_tbl[DFI_greg].enabled)
+ if (dump_enabled_p (DFI_greg))
{
timevar_push (TV_DUMP);
dump_global_regs (dump_file);
static void
rest_of_handle_gcse2 (void)
{
- timevar_push (TV_RELOAD_CSE_REGS);
+ timevar_push (TV_GCSE_AFTER_RELOAD);
open_dump_file (DFI_gcse2, current_function_decl);
- gcse_after_reload_main (get_insns (), dump_file);
+ gcse_after_reload_main (get_insns ());
rebuild_jump_labels (get_insns ());
delete_trivially_dead_insns (get_insns (), max_reg_num ());
close_dump_file (DFI_gcse2, print_rtl_with_bb, get_insns ());
verify_flow_info ();
#endif
- timevar_pop (TV_RELOAD_CSE_REGS);
+ timevar_pop (TV_GCSE_AFTER_RELOAD);
}
/* Register allocation pre-pass, to reduce number of moves necessary
dump_flow_info (dump_file);
tracer (0);
cleanup_cfg (CLEANUP_EXPENSIVE);
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
close_dump_file (DFI_tracer, print_rtl_with_bb, get_insns ());
}
if (dump_file)
dump_flow_info (dump_file);
cleanup_cfg (CLEANUP_EXPENSIVE);
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
if_convert (0);
}
timevar_push (TV_JUMP);
cleanup_cfg (CLEANUP_EXPENSIVE);
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
timevar_pop (TV_JUMP);
close_dump_file (DFI_ce1, print_rtl_with_bb, get_insns ());
timevar_pop (TV_WEB);
close_dump_file (DFI_web, print_rtl_with_bb, get_insns ());
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
}
/* Do branch profiling and static profile estimation passes. */
/* Discover and record the loop depth at the head of each basic
block. The loop infrastructure does the real job for us. */
- flow_loops_find (&loops, LOOP_TREE);
+ flow_loops_find (&loops);
if (dump_file)
flow_loops_dump (&loops, dump_file, NULL, 0);
it as constant, otherwise -fbranch-probabilities will not read data back.
life_analysis rarely eliminates modification of external memory.
- */
- if (optimize)
+
+ FIXME: now with tree based profiling we are in the trap described above
+ again. It seems to be easiest to disable the optimization for time
+ being before the problem is either solved by moving the transformation
+ to the IPA level (we need the CFG for this) or the very early optimization
+ passes are made to ignore the const/pure flags so code does not change. */
+ if (optimize
+ && (!flag_tree_based_profiling
+ || (!profile_arc_flag && !flag_branch_probabilities)))
{
/* Alias analysis depends on this information and mark_constant_function
depends on alias analysis. */
- reg_scan (get_insns (), max_reg_num (), 1);
+ reg_scan (get_insns (), max_reg_num ());
mark_constant_function ();
}
open_dump_file (DFI_bypass, current_function_decl);
cleanup_cfg (CLEANUP_EXPENSIVE);
- reg_scan (get_insns (), max_reg_num (), 1);
+ reg_scan (get_insns (), max_reg_num ());
if (bypass_jumps (dump_file))
{
rebuild_jump_labels (get_insns ());
timevar_pop (TV_JUMP);
+ delete_dead_jumptables ();
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE);
}
#endif
life_analysis (dump_file, PROP_FINAL);
if (optimize)
- cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_UPDATE_LIFE
- | CLEANUP_LOG_LINKS
+ cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE | CLEANUP_LOG_LINKS
| (flag_thread_jumps ? CLEANUP_THREADING : 0));
if (extra_warnings)
if (optimize)
{
- if (!flag_new_regalloc && initialize_uninitialized_subregs ())
+ if (initialize_uninitialized_subregs ())
{
/* Insns were inserted, and possibly pseudos created, so
things might look a bit different. */
dump_flow_info (dump_file);
timevar_push (TV_CSE);
- reg_scan (get_insns (), max_reg_num (), 1);
+ reg_scan (get_insns (), max_reg_num ());
- tem = cse_main (get_insns (), max_reg_num (), 0, dump_file);
+ tem = cse_main (get_insns (), max_reg_num (), dump_file);
if (tem)
rebuild_jump_labels (get_insns ());
if (purge_all_dead_edges (0))
expecting CSE to be run. But always rerun it in a cheap mode. */
cse_not_expected = !flag_rerun_cse_after_loop && !flag_gcse;
+ if (tem)
+ delete_dead_jumptables ();
+
if (tem || optimize > 1)
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
if (dump_file)
dump_flow_info (dump_file);
/* CFG is no longer maintained up-to-date. */
- tem = cse_main (get_insns (), max_reg_num (), 1, dump_file);
+ tem = cse_main (get_insns (), max_reg_num (), dump_file);
/* Run a pass to eliminate duplicated assignments to condition code
registers. We have to run this after bypass_jumps, because it
{
timevar_push (TV_JUMP);
rebuild_jump_labels (get_insns ());
+ delete_dead_jumptables ();
cleanup_cfg (CLEANUP_EXPENSIVE);
timevar_pop (TV_JUMP);
}
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
close_dump_file (DFI_cse2, print_rtl_with_bb, get_insns ());
timevar_pop (TV_CSE2);
if (flag_expensive_optimizations)
{
timevar_push (TV_CSE);
- reg_scan (get_insns (), max_reg_num (), 1);
- tem2 = cse_main (get_insns (), max_reg_num (), 0, dump_file);
+ reg_scan (get_insns (), max_reg_num ());
+ tem2 = cse_main (get_insns (), max_reg_num (), dump_file);
purge_all_dead_edges (0);
delete_trivially_dead_insns (get_insns (), max_reg_num ());
timevar_pop (TV_CSE);
}
/* If gcse or cse altered any jumps, rerun jump optimizations to clean
- things up. Then possibly re-run CSE again. */
- while (tem || tem2)
+ things up. */
+ if (tem || tem2)
{
- tem = tem2 = 0;
timevar_push (TV_JUMP);
rebuild_jump_labels (get_insns ());
+ delete_dead_jumptables ();
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
timevar_pop (TV_JUMP);
-
- if (flag_expensive_optimizations)
- {
- timevar_push (TV_CSE);
- reg_scan (get_insns (), max_reg_num (), 1);
- tem2 = cse_main (get_insns (), max_reg_num (), 0, dump_file);
- purge_all_dead_edges (0);
- delete_trivially_dead_insns (get_insns (), max_reg_num ());
- timevar_pop (TV_CSE);
- }
}
close_dump_file (DFI_gcse, print_rtl_with_bb, get_insns ());
static void
rest_of_handle_loop_optimize (void)
{
- int do_unroll, do_prefetch;
+ int do_prefetch;
timevar_push (TV_LOOP);
- delete_dead_jumptables ();
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
open_dump_file (DFI_loop, current_function_decl);
/* CFG is no longer maintained up-to-date. */
free_bb_for_insn ();
+ profile_status = PROFILE_ABSENT;
- if (flag_unroll_loops)
- do_unroll = LOOP_AUTO_UNROLL; /* Having two unrollers is useless. */
- else
- do_unroll = flag_old_unroll_loops ? LOOP_UNROLL : LOOP_AUTO_UNROLL;
do_prefetch = flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0;
if (flag_rerun_loop_opt)
cleanup_barriers ();
/* We only want to perform unrolling once. */
- loop_optimize (get_insns (), dump_file, do_unroll);
- do_unroll = 0;
+ loop_optimize (get_insns (), dump_file, 0);
/* The first call to loop_optimize makes some instructions
trivially dead. We delete those instructions now in the
/* The regscan pass is currently necessary as the alias
analysis code depends on this information. */
- reg_scan (get_insns (), max_reg_num (), 1);
+ reg_scan (get_insns (), max_reg_num ());
}
cleanup_barriers ();
- loop_optimize (get_insns (), dump_file, do_unroll | do_prefetch);
+ loop_optimize (get_insns (), dump_file, do_prefetch);
/* Loop can create trivially dead instructions. */
delete_trivially_dead_insns (get_insns (), max_reg_num ());
- find_basic_blocks (get_insns (), max_reg_num (), dump_file);
+ find_basic_blocks (get_insns ());
close_dump_file (DFI_loop, print_rtl, get_insns ());
timevar_pop (TV_LOOP);
cleanup_cfg (CLEANUP_EXPENSIVE);
delete_trivially_dead_insns (get_insns (), max_reg_num ());
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
if (dump_file)
dump_flow_info (dump_file);
close_dump_file (DFI_loop2, print_rtl_with_bb, get_insns ());
timevar_push (TV_JUMP);
open_dump_file (DFI_sibling, current_function_decl);
- /* ??? We may get caled either via tree_rest_of_compilation when the CFG
- is already built or directly (for instance from coverage code).
- The direct callers shall be updated. */
- if (!basic_block_info)
- {
- init_flow ();
- rebuild_jump_labels (get_insns ());
- find_exception_handler_labels ();
- find_basic_blocks (get_insns (), max_reg_num (), dump_file);
- }
-
- /* ??? We may get called either via tree_rest_of_compilation when the CFG
- is already built or directly (for instance from coverage code).
- The direct callers shall be updated. */
- if (!basic_block_info)
- {
- init_flow ();
- rebuild_jump_labels (get_insns ());
- find_exception_handler_labels ();
- find_basic_blocks (get_insns (), max_reg_num (), dump_file);
- }
delete_unreachable_blocks ();
#ifdef ENABLE_CHECKING
verify_flow_info ();
#endif
+
+ if (cfun->tail_call_emit)
+ fixup_tail_calls ();
+
+ close_dump_file (DFI_sibling, print_rtl, get_insns ());
timevar_pop (TV_JUMP);
}
}
}
-
-static void
-rest_of_handle_prologue_epilogue (void)
-{
- if (optimize && !flow2_completed)
- cleanup_cfg (CLEANUP_EXPENSIVE);
-
- /* On some machines, the prologue and epilogue code, or parts thereof,
- can be represented as RTL. Doing so lets us schedule insns between
- it and the rest of the code and also allows delayed branch
- scheduling to operate in the epilogue. */
- thread_prologue_and_epilogue_insns (get_insns ());
- epilogue_completed = 1;
-
- if (optimize && flow2_completed)
- life_analysis (dump_file, PROP_POSTRELOAD);
-}
-
static void
rest_of_handle_stack_adjustments (void)
{
split_all_insns (0);
if (flag_branch_target_load_optimize)
- rest_of_handle_branch_target_load_optimize ();
+ {
+ close_dump_file (DFI_flow2, print_rtl_with_bb, get_insns ());
+ rest_of_handle_branch_target_load_optimize ();
+ open_dump_file (DFI_flow2, current_function_decl);
+ }
- if (!targetm.late_rtl_prologue_epilogue)
- rest_of_handle_prologue_epilogue ();
+ if (optimize)
+ cleanup_cfg (CLEANUP_EXPENSIVE);
+
+ /* On some machines, the prologue and epilogue code, or parts thereof,
+ can be represented as RTL. Doing so lets us schedule insns between
+ it and the rest of the code and also allows delayed branch
+ scheduling to operate in the epilogue. */
+ thread_prologue_and_epilogue_insns (get_insns ());
+ epilogue_completed = 1;
if (optimize)
rest_of_handle_stack_adjustments ();
expected_value_to_br_prob ();
delete_trivially_dead_insns (get_insns (), max_reg_num ());
- reg_scan (get_insns (), max_reg_num (), 0);
+ reg_scan (get_insns (), max_reg_num ());
if (dump_file)
dump_flow_info (dump_file);
cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_PRE_LOOP
static void
rest_of_clean_state (void)
{
+ rtx insn, next;
coverage_end_function ();
+ /* It is very important to decompose the RTL instruction chain here:
+ debug information keeps pointing into CODE_LABEL insns inside the function
+ body. If these remain pointing to the other insns, we end up preserving
+ whole RTL chain and attached detailed debug info in memory. */
+ for (insn = get_insns (); insn; insn = next)
+ {
+ next = NEXT_INSN (insn);
+ NEXT_INSN (insn) = NULL;
+ PREV_INSN (insn) = NULL;
+ }
+
/* In case the function was not output,
don't leave any temporary anonymous types
queued up for sdb output. */
if (targetm.binds_local_p (current_function_decl))
{
int pref = cfun->preferred_stack_boundary;
- if (cfun->recursive_call_emit
- && cfun->stack_alignment_needed > cfun->preferred_stack_boundary)
+ if (cfun->stack_alignment_needed > cfun->preferred_stack_boundary)
pref = cfun->stack_alignment_needed;
cgraph_rtl_info (current_function_decl)->preferred_incoming_stack_boundary
= pref;
/* We're done with this function. Free up memory if we can. */
free_after_parsing (cfun);
+ free_after_compilation (cfun);
}
\f
after all tree passes have finished for a single function, and we
have expanded the function body from trees to RTL.
Once we are here, we have decided that we're supposed to output
- that function, ie. that we should write assembler code for it.
+ that function, i.e. that we should write assembler code for it.
We run a series of low-level passes here on the function's RTL
representation. Each pass is called via a rest_of_* function. */
-void
+static void
rest_of_compilation (void)
{
- /* There's no need to defer outputting this function any more; we
- know we want to output it. */
- DECL_DEFER_OUTPUT (current_function_decl) = 0;
-
- /* Now that we're done expanding trees to RTL, we shouldn't have any
- more CONCATs anywhere. */
- generating_concat_p = 0;
-
- /* When processing delayed functions, prepare_function_start () won't
- have been run to re-initialize it. */
- cse_not_expected = ! optimize;
-
- finalize_block_changes ();
-
- /* Dump the rtl code if we are dumping rtl. */
- if (open_dump_file (DFI_rtl, current_function_decl))
- close_dump_file (DFI_rtl, print_rtl, get_insns ());
-
- /* Convert from NOTE_INSN_EH_REGION style notes, and do other
- sorts of eh initialization. Delay this until after the
- initial rtl dump so that we can see the original nesting. */
- convert_from_eh_region_ranges ();
-
/* If we're emitting a nested function, make sure its parent gets
emitted as well. Doing otherwise confuses debug info. */
{
rest_of_handle_jump ();
- if (cfun->tail_call_emit)
- fixup_tail_calls ();
-
rest_of_handle_eh ();
/* Delay emitting hard_reg_initial_value sets until after EH landing pad
if (flag_branch_probabilities
&& flag_profile_values
- && flag_value_profile_transformations)
+ && (flag_value_profile_transformations
+ || flag_speculative_prefetching))
rest_of_handle_value_profile_transformations ();
/* Remove the death notes created for vpt. */
rest_of_handle_if_after_combine ();
/* The optimization to partition hot/cold basic blocks into separate
- sections of the .o file does not work well with exception handling.
- Don't call it if there are exceptions. */
+ sections of the .o file does not work well with linkonce or with
+ user defined section attributes. Don't call it if either case
+ arises. */
- if (optimize > 0 && flag_reorder_blocks_and_partition && !flag_exceptions)
+ if (flag_reorder_blocks_and_partition
+ && !DECL_ONE_ONLY (current_function_decl)
+ && !user_defined_section_attribute)
rest_of_handle_partition_blocks ();
- if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
+ if (optimize > 0 && flag_regmove)
rest_of_handle_regmove ();
/* Do unconditional splitting before register allocation to allow machine
/* Any of the several passes since flow1 will have munged register
lifetime data a bit. We need it to be up to date for scheduling
(see handling of reg_known_equiv in init_alias_analysis). */
- recompute_reg_usage (get_insns (), !optimize_size);
+ recompute_reg_usage ();
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_modulo_sched)
epilogue thus changing register elimination offsets. */
current_function_is_leaf = leaf_function_p ();
- if (flag_new_regalloc)
- {
- if (rest_of_handle_new_regalloc ())
- goto exit_rest_of_compilation;
- }
- else
- {
- if (rest_of_handle_old_regalloc ())
- goto exit_rest_of_compilation;
- }
+ if (rest_of_handle_old_regalloc ())
+ goto exit_rest_of_compilation;
if (optimize > 0)
rest_of_handle_postreload ();
= optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
#endif
- if (targetm.late_rtl_prologue_epilogue)
- rest_of_handle_prologue_epilogue ();
-
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_schedule_insns_after_reload)
rest_of_handle_sched2 ();
compute_alignments ();
+ /* Aggressively duplicate basic blocks ending in computed gotos to the
+ tails of their predecessors, unless we are optimizing for size. */
+ if (flag_expensive_optimizations && !optimize_size)
+ duplicate_computed_gotos ();
+
if (flag_var_tracking)
rest_of_handle_variable_tracking ();
}
void
-init_optimization_passes (void)
-{
- open_dump_file (DFI_cgraph, NULL);
- cgraph_dump_file = dump_file;
- dump_file = NULL;
-}
-
-void
finish_optimization_passes (void)
{
+ enum tree_dump_index i;
+ struct dump_file_info *dfi;
+ char *name;
+
timevar_push (TV_DUMP);
if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
{
close_dump_file (DFI_combine, NULL, NULL_RTX);
}
- dump_file = cgraph_dump_file;
- cgraph_dump_file = NULL;
- close_dump_file (DFI_cgraph, NULL, NULL_RTX);
-
/* Do whatever is necessary to finish printing the graphs. */
if (graph_dump_format != no_graph)
- {
- int i;
-
- for (i = 0; i < (int) DFI_MAX; ++i)
- if (dump_file_tbl[i].initialized && dump_file_tbl[i].graph_dump_p)
- {
- char seq[16];
- char *suffix;
-
- sprintf (seq, DUMPFILE_FORMAT, i);
- suffix = concat (seq, dump_file_tbl[i].extension, NULL);
- finish_graph_dump_file (dump_base_name, suffix);
- free (suffix);
- }
- }
+ for (i = DFI_MIN; (dfi = get_dump_file_info (i)) != NULL; ++i)
+ if (dump_initialized_p (i)
+ && (dfi->flags & TDF_RTL) != 0
+ && (name = get_dump_file_name (i)) != NULL)
+ {
+ finish_graph_dump_file (name);
+ free (name);
+ }
timevar_pop (TV_DUMP);
}
-bool
-enable_rtl_dump_file (int letter)
-{
- bool matched = false;
- int i;
-
- if (letter == 'a')
- {
- for (i = 0; i < (int) DFI_MAX; ++i)
- dump_file_tbl[i].enabled = 1;
- matched = true;
- }
- else
- {
- for (i = 0; i < (int) DFI_MAX; ++i)
- if (letter == dump_file_tbl[i].debug_switch)
- {
- dump_file_tbl[i].enabled = 1;
- matched = true;
- }
- }
-
- return matched;
-}
-
struct tree_opt_pass pass_rest_of_compilation =
{
- "rest of compilation", /* name */
+ NULL, /* name */
NULL, /* gate */
rest_of_compilation, /* execute */
NULL, /* sub */
0, /* properties_provided */
PROP_rtl, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_ggc_collect /* todo_flags_finish */
+ TODO_ggc_collect, /* todo_flags_finish */
+ 0 /* letter */
};
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