/* 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 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#include "regs.h"
#include "timevar.h"
#include "diagnostic.h"
-#include "ssa.h"
#include "params.h"
#include "reload.h"
#include "dwarf2asm.h"
#include "cgraph.h"
#include "opts.h"
#include "coverage.h"
+#include "value-prof.h"
#if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
#include "dwarf2out.h"
declarations for e.g. AIX 4.x. */
#endif
+#ifndef HAVE_conditional_execution
+#define HAVE_conditional_execution 0
+#endif
+
/* Carry information from ASM_DECLARE_OBJECT_NAME
to ASM_FINISH_DECLARE_OBJECT. */
/* Rest of compilation helper functions. */
static bool rest_of_handle_inlining (tree);
-static rtx rest_of_handle_ssa (tree, rtx);
static void rest_of_handle_cse (tree, rtx);
static void rest_of_handle_cse2 (tree, rtx);
static void rest_of_handle_gcse (tree, rtx);
static void rest_of_handle_addressof (tree, rtx);
static void rest_of_handle_cfg (tree, rtx);
static void rest_of_handle_branch_prob (tree, rtx);
+static void rest_of_handle_value_profile_transformations (tree, rtx);
static void rest_of_handle_if_conversion (tree, rtx);
static void rest_of_handle_if_after_combine (tree, rtx);
static void rest_of_handle_tracer (tree, rtx);
static void rest_of_handle_sched (tree, rtx);
static void rest_of_handle_sched2 (tree, rtx);
#endif
-static bool rest_of_handle_new_regalloc (tree, rtx, int *);
-static bool rest_of_handle_old_regalloc (tree, rtx, int *);
+static bool rest_of_handle_new_regalloc (tree, rtx);
+static bool rest_of_handle_old_regalloc (tree, rtx);
static void rest_of_handle_regrename (tree, rtx);
static void rest_of_handle_reorder_blocks (tree, rtx);
#ifdef STACK_REGS
location_t input_location;
+struct line_maps line_table;
+
/* Nonzero if it is unsafe to create any new pseudo registers. */
int no_new_pseudos;
DFI_sibling,
DFI_eh,
DFI_jump,
- DFI_ssa,
- DFI_ssa_ccp,
- DFI_ssa_dce,
- DFI_ussa,
DFI_null,
DFI_cse,
DFI_addressof,
DFI_bypass,
DFI_cfg,
DFI_bp,
+ DFI_vpt,
DFI_ce1,
DFI_tracer,
DFI_loop2,
+ DFI_web,
DFI_cse2,
DFI_life,
DFI_combine,
DFI_flow2,
DFI_peephole2,
DFI_rnreg,
- DFI_bbro,
DFI_ce3,
+ DFI_bbro,
DFI_branch_target_load,
DFI_sched2,
DFI_stack,
Remaining -d letters:
- " m q "
- " JK O Q V YZ"
+ " e m q "
+ " JK O Q WXY "
*/
static struct dump_file_info dump_file[DFI_MAX] =
{ "sibling", 'i', 0, 0, 0 },
{ "eh", 'h', 0, 0, 0 },
{ "jump", 'j', 0, 0, 0 },
- { "ssa", 'e', 1, 0, 0 },
- { "ssaccp", 'W', 1, 0, 0 },
- { "ssadce", 'X', 1, 0, 0 },
- { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
{ "null", 'u', 0, 0, 0 },
{ "cse", 's', 0, 0, 0 },
{ "addressof", 'F', 0, 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 },
{ "flow2", 'w', 1, 0, 0 },
{ "peephole2", 'z', 1, 0, 0 },
{ "rnreg", 'n', 1, 0, 0 },
- { "bbro", 'B', 1, 0, 0 },
{ "ce3", 'E', 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 },
int flag_profile_values = 0;
+/* Nonzero if value histograms should be used to optimize code. */
+int flag_value_profile_transformations = 0;
+
/* Nonzero if generating info for gcov to calculate line test coverage. */
int flag_test_coverage = 0;
be saved across function calls, if that produces overall better code.
Optional now, so people can test it. */
-#ifdef DEFAULT_CALLER_SAVES
-int flag_caller_saves = 1;
-#else
int flag_caller_saves = 0;
-#endif
/* Nonzero if structures and unions should be returned in memory.
int flag_syntax_only = 0;
+/* Nonzero means performs web construction pass. */
+
+int flag_web;
+
/* Nonzero means perform loop optimizer. */
int flag_loop_optimize;
int flag_gcse_sm = 1;
+/* Nonzero if we want to perfrom redundant load after store elimination
+ in gcse. */
+
+int flag_gcse_las = 1;
+
/* Perform target register optimization before prologue / epilogue
threading. */
int flag_branch_target_load_optimize2 = 0;
+/* For the bt-load pass, nonzero means don't re-use branch target registers
+ in any basic block. */
+
+int flag_btr_bb_exclusive;
+
/* Nonzero means to rerun cse after loop optimization. This increases
compilation time about 20% and picks up a few more common expressions. */
int flag_schedule_speculative_load = 0;
int flag_schedule_speculative_load_dangerous = 0;
+/* The following flags have an effect during scheduling after register
+ allocation:
+
+ flag_sched_stalled_insns means that insns can be moved prematurely from the queue
+ of stalled insns into the ready list.
+
+ flag_sched_stalled_insns_dep controls how many insn groups will be examined
+ for a dependency on a stalled insn that is candidate for premature removal
+ from the queue of stalled insns into the ready list (has an effect only if
+ the flag 'sched_stalled_insns' is set). */
+
+int flag_sched_stalled_insns = 0;
+int flag_sched_stalled_insns_dep = 1;
+
int flag_single_precision_constant;
/* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
int flag_dump_rtl_in_asm = 0;
-/* -fgnu-linker specifies use of the GNU linker for initializations.
- (Or, more generally, a linker that handles initializations.)
- -fno-gnu-linker says that collect2 will be used. */
-#ifdef USE_COLLECT2
-int flag_gnu_linker = 0;
-#else
-int flag_gnu_linker = 1;
-#endif
-
/* Nonzero means put zero initialized data in the bss section. */
int flag_zero_initialized_in_bss = 1;
-/* Enable SSA. */
-int flag_ssa = 0;
-
-/* Enable ssa conditional constant propagation. */
-int flag_ssa_ccp = 0;
-
-/* Enable ssa aggressive dead code elimination. */
-int flag_ssa_dce = 0;
-
/* Tag all structures with __attribute__(packed). */
int flag_pack_struct = 0;
/* Nonzero if signed arithmetic overflow should wrap around. */
int flag_wrapv = 0;
+/* Nonzero if subexpressions must be evaluated from left-to-right. */
+int flag_evaluation_order = 0;
+
/* Add or remove a leading underscore from user symbols. */
int flag_leading_underscore = -1;
{"pcc-struct-return", &flag_pcc_struct_return, 1 },
{"reg-struct-return", &flag_pcc_struct_return, 0 },
{"delayed-branch", &flag_delayed_branch, 1 },
+ {"web", &flag_web, 1},
{"gcse", &flag_gcse, 1 },
{"gcse-lm", &flag_gcse_lm, 1 },
{"gcse-sm", &flag_gcse_sm, 1 },
+ {"gcse-las", &flag_gcse_las, 1 },
{"branch-target-load-optimize", &flag_branch_target_load_optimize, 1 },
{"branch-target-load-optimize2", &flag_branch_target_load_optimize2, 1 },
+ {"btr-bb-exclusive", &flag_btr_bb_exclusive, 1 },
{"loop-optimize", &flag_loop_optimize, 1 },
{"crossjumping", &flag_crossjumping, 1 },
{"if-conversion", &flag_if_conversion, 1 },
{"sched-spec",&flag_schedule_speculative, 1 },
{"sched-spec-load",&flag_schedule_speculative_load, 1 },
{"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1 },
+ {"sched-stalled-insns", &flag_sched_stalled_insns, 0 },
+ {"sched-stalled-insns-dep", &flag_sched_stalled_insns_dep, 1 },
{"sched2-use-superblocks", &flag_sched2_use_superblocks, 1 },
{"sched2-use-traces", &flag_sched2_use_traces, 1 },
{"branch-count-reg",&flag_branch_on_count_reg, 1 },
{"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1 },
{"non-call-exceptions", &flag_non_call_exceptions, 1 },
{"profile-arcs", &profile_arc_flag, 1 },
+ {"profile-values", &flag_profile_values, 1 },
+ {"vpt", &flag_value_profile_transformations, 1 },
{"test-coverage", &flag_test_coverage, 1 },
{"branch-probabilities", &flag_branch_probabilities, 1 },
{"profile", &profile_flag, 1 },
{"function-sections", &flag_function_sections, 1 },
{"data-sections", &flag_data_sections, 1 },
{"verbose-asm", &flag_verbose_asm, 1 },
- {"gnu-linker", &flag_gnu_linker, 1 },
{"regmove", &flag_regmove, 1 },
{"optimize-register-move", &flag_regmove, 1 },
{"pack-struct", &flag_pack_struct, 1 },
{"dump-unnumbered", &flag_dump_unnumbered, 1 },
{"instrument-functions", &flag_instrument_function_entry_exit, 1 },
{"zero-initialized-in-bss", &flag_zero_initialized_in_bss, 1 },
- {"ssa", &flag_ssa, 1 },
- {"ssa-ccp", &flag_ssa_ccp, 1 },
- {"ssa-dce", &flag_ssa_dce, 1 },
{"leading-underscore", &flag_leading_underscore, 1 },
{"ident", &flag_no_ident, 0 },
{ "peephole2", &flag_peephole2, 1 },
{
unsigned HOST_WIDE_INT value;
static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
-
+
/* Get some more or less random data. */
#ifdef HAVE_GETTIMEOFDAY
{
struct timeval tv;
-
+
gettimeofday (&tv, NULL);
local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
}
#endif
value = local_tick ^ getpid ();
-
+
sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
flag_random_seed = random_seed;
}
void
output_file_directive (FILE *asm_file, const char *input_name)
{
- int len = strlen (input_name);
- const char *na = input_name + len;
+ int len;
+ const char *na;
+
+ if (input_name == NULL)
+ input_name = "<stdin>";
+
+ len = strlen (input_name);
+ na = input_name + len;
/* NA gets INPUT_NAME sans directory names. */
while (na > input_name)
na--;
}
-#ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
- ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
-#else
#ifdef ASM_OUTPUT_SOURCE_FILENAME
ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
#else
output_quoted_string (asm_file, na);
fputc ('\n', asm_file);
#endif
-#endif
}
/* Routine to open a dump file. Return true if the dump file is enabled. */
/* Warn about static fns or vars defined but not used. */
if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
- || (warn_unused_variable && TREE_CODE (decl) == VAR_DECL))
+ /* We don't warn about "static const" variables because the
+ "rcs_id" idiom uses that construction. */
+ || (warn_unused_variable
+ && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
+ && ! DECL_IN_SYSTEM_HEADER (decl)
&& ! TREE_USED (decl)
/* The TREE_USED bit for file-scope decls is kept in the identifier,
to handle multiple external decls in different scopes. */
if (DECL_P (node))
warning ("`%s' is deprecated (declared at %s:%d)",
IDENTIFIER_POINTER (DECL_NAME (node)),
- TREE_FILENAME (node), TREE_LINENO (node));
+ DECL_SOURCE_FILE (node), DECL_SOURCE_LINE (node));
else if (TYPE_P (node))
{
const char *what = NULL;
{
if (decl)
warning ("`%s' is deprecated (declared at %s:%d)", what,
- TREE_FILENAME (decl), TREE_LINENO (decl));
+ DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
else
warning ("`%s' is deprecated", what);
}
else if (decl)
warning ("type is deprecated (declared at %s:%d)",
- TREE_FILENAME (decl), TREE_LINENO (decl));
+ DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
else
warning ("type is deprecated");
}
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. */
- if ((at_end || !DECL_DEFER_OUTPUT (decl)) && !DECL_EXTERNAL (decl))
+ is seen. But at end of compilation, do output code for them.
+
+ We do output all variables when unit-at-a-time is active and rely on
+ callgraph code to defer them except for forward declarations
+ (see gcc.c-torture/compile/920624-1.c) */
+ if ((at_end
+ || !DECL_DEFER_OUTPUT (decl)
+ || (flag_unit_at_a_time && DECL_INITIAL (decl)))
+ && !DECL_EXTERNAL (decl))
{
if (flag_unit_at_a_time && !cgraph_global_info_ready
&& TREE_CODE (decl) != FUNCTION_DECL && top_level)
#if defined (HAVE_ATTR_length)
/* If flow2 creates new instructions which need splitting
and scheduling after reload is not done, they might not be
- splitten until final which doesn't allow splitting
+ split until final which doesn't allow splitting
if HAVE_ATTR_length. */
#ifdef INSN_SCHEDULING
if (optimize && !flag_schedule_insns_after_reload)
/* Run new register allocator. Return TRUE if we must exit
rest_of_compilation upon return. */
static bool
-rest_of_handle_new_regalloc (tree decl, rtx insns, int *rebuild_notes)
+rest_of_handle_new_regalloc (tree decl, rtx insns)
{
int failure;
return true;
reload_completed = 1;
- *rebuild_notes = 0;
return false;
}
/* Run old register allocator. Return TRUE if we must exit
rest_of_compilation upon return. */
static bool
-rest_of_handle_old_regalloc (tree decl, rtx insns, int *rebuild_notes)
+rest_of_handle_old_regalloc (tree decl, rtx insns)
{
int failure;
+ int rebuild_notes;
/* Allocate the reg_renumber array. */
allocate_reg_info (max_regno, FALSE, TRUE);
allocate_initial_values (reg_equiv_memory_loc);
regclass (insns, max_reg_num (), rtl_dump_file);
- *rebuild_notes = local_alloc ();
+ rebuild_notes = local_alloc ();
timevar_pop (TV_LOCAL_ALLOC);
+ /* Local allocation may have turned an indirect jump into a direct
+ jump. If so, we must rebuild the JUMP_LABEL fields of jumping
+ instructions. */
+ if (rebuild_notes)
+ {
+ timevar_push (TV_JUMP);
+
+ rebuild_jump_labels (insns);
+ purge_all_dead_edges (0);
+
+ timevar_pop (TV_JUMP);
+ }
+
if (dump_file[DFI_lreg].enabled)
{
timevar_push (TV_DUMP);
static void
rest_of_handle_reorder_blocks (tree decl, rtx insns)
{
- timevar_push (TV_REORDER_BLOCKS);
+ bool changed;
open_dump_file (DFI_bbro, decl);
/* Last attempt to optimize CFG, as scheduling, peepholing and insn
splitting possibly introduced more crossjumping opportunities. */
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE
- | (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
+ changed = cleanup_cfg (CLEANUP_EXPENSIVE
+ | (!HAVE_conditional_execution
+ ? CLEANUP_UPDATE_LIFE : 0));
if (flag_sched2_use_traces && flag_schedule_insns_after_reload)
tracer ();
reorder_basic_blocks ();
if (flag_reorder_blocks
|| (flag_sched2_use_traces && flag_schedule_insns_after_reload))
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE);
-
+ changed |= cleanup_cfg (CLEANUP_EXPENSIVE
+ | (!HAVE_conditional_execution
+ ? CLEANUP_UPDATE_LIFE : 0));
+
+ /* On conditional execution targets we can not update the life cheaply, so
+ we deffer the updating to after both cleanups. This may lose some cases
+ but should not be terribly bad. */
+ if (changed && HAVE_conditional_execution)
+ update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
+ PROP_DEATH_NOTES | PROP_REG_INFO);
close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
- timevar_pop (TV_REORDER_BLOCKS);
}
#ifdef INSN_SCHEDULING
static void
rest_of_handle_tracer (tree decl, rtx insns)
{
- timevar_push (TV_TRACER);
open_dump_file (DFI_tracer, decl);
if (rtl_dump_file)
dump_flow_info (rtl_dump_file);
cleanup_cfg (CLEANUP_EXPENSIVE);
reg_scan (insns, max_reg_num (), 0);
close_dump_file (DFI_tracer, print_rtl_with_bb, get_insns ());
- timevar_pop (TV_TRACER);
}
/* If-conversion and CFG cleanup. */
timevar_pop (TV_IFCVT);
}
+static void
+rest_of_handle_web (tree decl, rtx insns)
+{
+ open_dump_file (DFI_web, decl);
+ timevar_push (TV_WEB);
+ web_main ();
+ delete_trivially_dead_insns (insns, max_reg_num ());
+ cleanup_cfg (CLEANUP_EXPENSIVE);
+
+ timevar_pop (TV_WEB);
+ close_dump_file (DFI_web, print_rtl_with_bb, insns);
+ reg_scan (get_insns (), max_reg_num (), 0);
+}
+
/* Do branch profiling and static profile estimation passes. */
static void
rest_of_handle_branch_prob (tree decl, rtx insns)
timevar_push (TV_BRANCH_PROB);
open_dump_file (DFI_bp, decl);
+
if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
branch_prob ();
estimate_probability (&loops);
flow_loops_free (&loops);
+ free_dominance_info (CDI_DOMINATORS);
close_dump_file (DFI_bp, print_rtl_with_bb, insns);
timevar_pop (TV_BRANCH_PROB);
}
+/* Do optimizations based on expression value profiles. */
+static void
+rest_of_handle_value_profile_transformations (tree decl, rtx insns)
+{
+ open_dump_file (DFI_vpt, decl);
+ timevar_push (TV_VPT);
+
+ if (value_profile_transformations ())
+ cleanup_cfg (CLEANUP_EXPENSIVE);
+
+ timevar_pop (TV_VPT);
+ close_dump_file (DFI_vpt, print_rtl_with_bb, insns);
+}
+
/* Do control and data flow analysis; write some of the results to the
dump file. */
static void
life_analysis rarely eliminates modification of external memory.
*/
if (optimize)
- mark_constant_function ();
+ {
+ /* Alias analysis depends on this information and mark_constant_function
+ depends on alias analysis. */
+ reg_scan (insns, max_reg_num (), 1);
+ mark_constant_function ();
+ }
close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
}
open_dump_file (DFI_bypass, decl);
cleanup_cfg (CLEANUP_EXPENSIVE);
+ reg_scan (insns, max_reg_num (), 1);
if (bypass_jumps (rtl_dump_file))
{
if (inlinable
|| (DECL_INLINE (decl)
- && flag_inline_functions
+ /* Egad. This RTL deferral test conflicts with Fortran assumptions
+ for unreferenced symbols. See g77.f-torture/execute/980520-1.f.
+ But removing this line from the check breaks all languages that
+ use the call graph to output symbols. This hard-coded check is
+ the least invasive work-around. */
+ && (flag_inline_functions
+ || strcmp (lang_hooks.name, "GNU F77") == 0)
&& ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
&& ! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))
&& ! flag_keep_inline_functions)
return (bool) DECL_EXTERNAL (decl);
}
-/* Rest of compilation helper to convert the rtl to SSA form. */
-static rtx
-rest_of_handle_ssa (tree decl, rtx insns)
-{
- timevar_push (TV_TO_SSA);
- open_dump_file (DFI_ssa, decl);
-
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
- convert_to_ssa ();
-
- close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
- timevar_pop (TV_TO_SSA);
-
- /* Perform sparse conditional constant propagation, if requested. */
- if (flag_ssa_ccp)
- {
- timevar_push (TV_SSA_CCP);
- open_dump_file (DFI_ssa_ccp, decl);
-
- ssa_const_prop ();
-
- close_dump_file (DFI_ssa_ccp, print_rtl_with_bb, get_insns ());
- timevar_pop (TV_SSA_CCP);
- }
-
- /* It would be useful to cleanup the CFG at this point, but block
- merging and possibly other transformations might leave a PHI
- node in the middle of a basic block, which is a strict no-no. */
-
- /* The SSA implementation uses basic block numbers in its phi
- nodes. Thus, changing the control-flow graph or the basic
- blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
- may cause problems. */
-
- if (flag_ssa_dce)
- {
- /* Remove dead code. */
-
- timevar_push (TV_SSA_DCE);
- open_dump_file (DFI_ssa_dce, decl);
-
- insns = get_insns ();
- ssa_eliminate_dead_code ();
-
- close_dump_file (DFI_ssa_dce, print_rtl_with_bb, insns);
- timevar_pop (TV_SSA_DCE);
- }
-
- /* Convert from SSA form. */
-
- timevar_push (TV_FROM_SSA);
- open_dump_file (DFI_ussa, decl);
-
- convert_from_ssa ();
- /* New registers have been created. Rescan their usage. */
- reg_scan (insns, max_reg_num (), 1);
-
- close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
- timevar_pop (TV_FROM_SSA);
-
- ggc_collect ();
-
- return insns;
-}
-
/* Try to identify useless null pointer tests and delete them. */
static void
rest_of_handle_null_pointer (tree decl, rtx insns)
life_analysis (insns, rtl_dump_file, PROP_FINAL);
if (optimize)
cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_UPDATE_LIFE
+ | CLEANUP_LOG_LINKS
| (flag_thread_jumps ? CLEANUP_THREADING : 0));
timevar_pop (TV_FLOW);
dump_flow_info (rtl_dump_file);
/* CFG is no longer maintained up-to-date. */
tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
+
+ /* Run a pass to eliminate duplicated assignments to condition code
+ registers. We have to run this after bypass_jumps, because it
+ makes it harder for that pass to determine whether a jump can be
+ bypassed safely. */
+ cse_condition_code_reg ();
+
purge_all_dead_edges (0);
delete_trivially_dead_insns (insns, max_reg_num ());
free_bb_for_insn ();
if (flag_unroll_loops)
- do_unroll = 0; /* Having two unrollers is useless. */
+ 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;
rest_of_compilation (tree decl)
{
rtx insns;
- int rebuild_label_notes_after_reload;
timevar_push (TV_REST_OF_COMPILATION);
/* Register rtl specific functions for cfg. */
rtl_register_cfg_hooks ();
-
+
/* Now that we're out of the frontend, we shouldn't have any more
CONCATs anywhere. */
generating_concat_p = 0;
/* We are now committed to emitting code for this function. Do any
preparation, such as emitting abstract debug info for the inline
before it gets mangled by optimization. */
- if (DECL_INLINE (decl))
+ if (cgraph_function_possibly_inlined_p (decl))
(*debug_hooks->outlining_inline_function) (decl);
/* Remove any notes we don't need. That will make iterating
delete_unreachable_blocks ();
- /* We have to issue these warnings now already, because CFG cleanups
- further down may destroy the required information. */
- check_function_return_warnings ();
-
/* Turn NOTE_INSN_PREDICTIONs into branch predictions. */
if (flag_guess_branch_prob)
{
if (flag_optimize_sibling_calls)
rest_of_handle_sibling_calls (insns);
+ /* We have to issue these warnings now already, because CFG cleanups
+ further down may destroy the required information. However, this
+ must be done after the sibcall optimization pass because the barrier
+ emitted for noreturn calls that are candidate for the optimization
+ is folded into the CALL_PLACEHOLDER until after this pass, so the
+ CFG is inaccurate. */
+ check_function_return_warnings ();
+
timevar_pop (TV_JUMP);
insn_locators_initialize ();
if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
goto exit_rest_of_compilation;
- /* Long term, this should probably move before the jump optimizer too,
- but I didn't want to disturb the rtl_dump_and_exit and related
- stuff at this time. */
- if (optimize > 0 && flag_ssa)
- insns = rest_of_handle_ssa (decl, insns);
-
timevar_push (TV_JUMP);
if (optimize)
if (flag_loop_optimize)
rest_of_handle_loop_optimize (decl, insns);
-
- if (flag_gcse)
- rest_of_handle_jump_bypass (decl, insns);
}
timevar_push (TV_FLOW);
if (optimize > 0
|| profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
- rest_of_handle_branch_prob (decl, insns);
+ {
+ rest_of_handle_branch_prob (decl, insns);
+
+ if (flag_branch_probabilities
+ && flag_profile_values
+ && flag_value_profile_transformations)
+ rest_of_handle_value_profile_transformations (decl, insns);
+
+ /* Remove the death notes created for vpt. */
+ if (flag_profile_values)
+ count_or_remove_death_notes (NULL, 1);
+ }
if (optimize > 0)
rest_of_handle_if_conversion (decl, insns);
if (flag_tracer)
rest_of_handle_tracer (decl, insns);
- if (optimize > 0
- && (flag_unswitch_loops
+ if (optimize > 0)
+ {
+ if (flag_unswitch_loops
|| flag_peel_loops
- || flag_unroll_loops))
- rest_of_handle_loop2 (decl, insns);
+ || flag_unroll_loops)
+ rest_of_handle_loop2 (decl, insns);
+
+ if (flag_gcse)
+ rest_of_handle_jump_bypass (decl, insns);
+ }
+
+ if (flag_web)
+ rest_of_handle_web (decl, insns);
if (flag_rerun_cse_after_loop)
rest_of_handle_cse2 (decl, insns);
if (flag_new_regalloc)
{
- if (rest_of_handle_new_regalloc (decl, insns,
- &rebuild_label_notes_after_reload))
+ if (rest_of_handle_new_regalloc (decl, insns))
goto exit_rest_of_compilation;
}
else
{
- if (rest_of_handle_old_regalloc (decl, insns,
- &rebuild_label_notes_after_reload))
+ if (rest_of_handle_old_regalloc (decl, insns))
goto exit_rest_of_compilation;
}
{
timevar_push (TV_RELOAD_CSE_REGS);
reload_cse_regs (insns);
+ /* reload_cse_regs can eliminate potentially-trapping MEMs.
+ Remove any EH edges associated with them. */
+ if (flag_non_call_exceptions)
+ purge_all_dead_edges (0);
timevar_pop (TV_RELOAD_CSE_REGS);
}
- /* Register allocation and reloading may have turned an indirect jump into
- a direct jump. If so, we must rebuild the JUMP_LABEL fields of
- jumping instructions. */
- if (rebuild_label_notes_after_reload)
- {
- timevar_push (TV_JUMP);
-
- rebuild_jump_labels (insns);
- purge_all_dead_edges (0);
-
- timevar_pop (TV_JUMP);
- }
-
close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
/* Re-create the death notes which were deleted during reload. */
if (optimize)
{
- life_analysis (insns, rtl_dump_file, PROP_FINAL);
+ life_analysis (insns, rtl_dump_file, PROP_POSTRELOAD);
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE
| (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
}
#endif
- if (optimize > 0)
- {
- if (flag_rename_registers || flag_cprop_registers)
- rest_of_handle_regrename (decl, insns);
-
- rest_of_handle_reorder_blocks (decl, insns);
- }
-
+ open_dump_file (DFI_ce3, decl);
+ if (optimize)
+ /* Last attempt to optimize CFG, as scheduling, peepholing and insn
+ splitting possibly introduced more crossjumping opportunities. */
+ cleanup_cfg (CLEANUP_EXPENSIVE
+ | CLEANUP_UPDATE_LIFE
+ | (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
if (flag_if_conversion2)
{
timevar_push (TV_IFCVT2);
- open_dump_file (DFI_ce3, decl);
if_convert (1);
- close_dump_file (DFI_ce3, print_rtl_with_bb, insns);
timevar_pop (TV_IFCVT2);
}
+ close_dump_file (DFI_ce3, print_rtl_with_bb, insns);
- if (flag_branch_target_load_optimize2)
- {
- /* Leave this a warning for now so that it is possible to experiment
- with running this pass twice. In 3.6, we should either make this
- an error, or use separate dump files. */
- if (flag_branch_target_load_optimize)
- warning ("branch target register load optimization is not intended "
- "to be run twice");
+ if (optimize > 0)
+ {
+ if (flag_rename_registers || flag_cprop_registers)
+ rest_of_handle_regrename (decl, insns);
- open_dump_file (DFI_branch_target_load, decl);
+ rest_of_handle_reorder_blocks (decl, insns);
+ }
- branch_target_load_optimize (insns, true);
+ if (flag_branch_target_load_optimize2)
+ {
+ /* Leave this a warning for now so that it is possible to experiment
+ with running this pass twice. In 3.6, we should either make this
+ an error, or use separate dump files. */
+ if (flag_branch_target_load_optimize)
+ warning ("branch target register load optimization is not intended "
+ "to be run twice");
- close_dump_file (DFI_branch_target_load, print_rtl_with_bb, insns);
+ open_dump_file (DFI_branch_target_load, decl);
- ggc_collect ();
- }
+ branch_target_load_optimize (insns, true);
+
+ close_dump_file (DFI_branch_target_load, print_rtl_with_bb, insns);
+
+ ggc_collect ();
+ }
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_schedule_insns_after_reload)
}
/* Display help for target options. */
-void
+void
display_target_options (void)
{
int undoc, i;
}
}
+/* Default version of get_pch_validity.
+ By default, every flag difference is fatal; that will be mostly right for
+ most targets, but completely right for very few. */
+
+void *
+default_get_pch_validity (size_t *len)
+{
+#ifdef TARGET_OPTIONS
+ size_t i;
+#endif
+ char *result, *r;
+
+ *len = sizeof (target_flags) + 2;
+#ifdef TARGET_OPTIONS
+ for (i = 0; i < ARRAY_SIZE (target_options); i++)
+ {
+ *len += 1;
+ if (*target_options[i].variable)
+ *len += strlen (*target_options[i].variable);
+ }
+#endif
+
+ result = r = xmalloc (*len);
+ r[0] = flag_pic;
+ r[1] = flag_pie;
+ r += 2;
+ memcpy (r, &target_flags, sizeof (target_flags));
+ r += sizeof (target_flags);
+
+#ifdef TARGET_OPTIONS
+ for (i = 0; i < ARRAY_SIZE (target_options); i++)
+ {
+ const char *str = *target_options[i].variable;
+ size_t l;
+ if (! str)
+ str = "";
+ l = strlen (str) + 1;
+ memcpy (r, str, l);
+ r += l;
+ }
+#endif
+
+ return result;
+}
+
+/* Default version of pch_valid_p. */
+
+const char *
+default_pch_valid_p (const void *data_p, size_t len)
+{
+ const char *data = (const char *)data_p;
+ const char *flag_that_differs = NULL;
+ size_t i;
+
+ /* -fpic and -fpie also usually make a PCH invalid. */
+ if (data[0] != flag_pic)
+ return _("created and used with different settings of -fpic");
+ if (data[1] != flag_pie)
+ return _("created and used with different settings of -fpie");
+ data += 2;
+
+ /* Check target_flags. */
+ if (memcmp (data, &target_flags, sizeof (target_flags)) != 0)
+ {
+ for (i = 0; i < ARRAY_SIZE (target_switches); i++)
+ {
+ int bits;
+ int tf;
+
+ memcpy (&tf, data, sizeof (target_flags));
+
+ bits = target_switches[i].value;
+ if (bits < 0)
+ bits = -bits;
+ if ((target_flags & bits) != (tf & bits))
+ {
+ flag_that_differs = target_switches[i].name;
+ goto make_message;
+ }
+ }
+ abort ();
+ }
+ data += sizeof (target_flags);
+ len -= sizeof (target_flags);
+
+ /* Check string options. */
+#ifdef TARGET_OPTIONS
+ for (i = 0; i < ARRAY_SIZE (target_options); i++)
+ {
+ const char *str = *target_options[i].variable;
+ size_t l;
+ if (! str)
+ str = "";
+ l = strlen (str) + 1;
+ if (len < l || memcmp (data, str, l) != 0)
+ {
+ flag_that_differs = target_options[i].prefix;
+ goto make_message;
+ }
+ data += l;
+ len -= l;
+ }
+#endif
+
+ return NULL;
+
+ make_message:
+ {
+ char *r;
+ asprintf (&r, _("created and used with differing settings of `-m%s'"),
+ flag_that_differs);
+ if (r == NULL)
+ return _("out of memory");
+ return r;
+ }
+}
+
/* Default tree printer. Handles declarations only. */
static bool
default_tree_printer (pretty_printer * pp, text_info *text)
table. */
init_ggc ();
init_stringpool ();
+ linemap_init (&line_table);
init_ttree ();
/* Initialize register usage now so switches may override. */
if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
flag_unit_at_a_time = 0;
+ if (flag_value_profile_transformations)
+ flag_profile_values = 1;
+
/* Warn about options that are not supported on this machine. */
#ifndef INSN_SCHEDULING
if (flag_schedule_insns || flag_schedule_insns_after_reload)
else if (write_symbols == SDB_DEBUG)
debug_hooks = &sdb_debug_hooks;
#endif
-#ifdef DWARF_DEBUGGING_INFO
- else if (write_symbols == DWARF_DEBUG)
- debug_hooks = &dwarf_debug_hooks;
-#endif
#ifdef DWARF2_DEBUGGING_INFO
else if (write_symbols == DWARF2_DEBUG)
debug_hooks = &dwarf2_debug_hooks;
static void
backend_init (void)
{
+ init_adjust_machine_modes ();
+
init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
|| debug_info_level == DINFO_LEVEL_VERBOSE
#ifdef VMS_DEBUGGING_INFO
ggc_print_statistics ();
stringpool_statistics ();
dump_tree_statistics ();
+ dump_rtx_statistics ();
+ dump_varray_statistics ();
}
/* Free up memory for the benefit of leak detectors. */
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