int profile_arc_flag = 0;
+/* Nonzero if we should not attempt to generate thread-safe
+ code to profile program flow graph arcs. */
+
+int flag_unsafe_profile_arcs = 0;
+
/* Nonzero if generating info for gcov to calculate line test coverage. */
int flag_test_coverage = 0;
int flag_reorder_blocks = 0;
+/* Nonzero if functions should be reordered. */
+
+int flag_reorder_functions = 0;
+
/* Nonzero if registers should be renamed. */
int flag_rename_registers = 0;
N_("Support synchronous non-call exceptions") },
{"profile-arcs", &profile_arc_flag, 1,
N_("Insert arc based program profiling code") },
+ {"unsafe-profile-arcs", &flag_unsafe_profile_arcs, 1,
+ N_("Avoid thread safety profiling overhead") },
{"test-coverage", &flag_test_coverage, 1,
N_("Create data files needed by gcov") },
{"branch-probabilities", &flag_branch_probabilities, 1,
N_("Use profiling information for branch probabilities") },
+ {"profile", &profile_flag, 1,
+ N_("Enable basic program profiling code") },
{"reorder-blocks", &flag_reorder_blocks, 1,
N_("Reorder basic blocks to improve code placement") },
+ {"reorder-functions", &flag_reorder_functions, 1,
+ N_("Reorder functions to improve code placement") },
{"rename-registers", &flag_rename_registers, 1,
N_("Do the register renaming optimization pass") },
{"cprop-registers", &flag_cprop_registers, 1,
used here is to only describe those options which are not
enabled by default. */
- { "-ansi",
+ { "-ansi",
N_("Compile just for ISO C89") },
- { "-std= ",
+ { "-std= ",
N_("Determine language standard") },
{ "-fsigned-bitfields", "" },
N_("Make bit-fields by unsigned by default") },
{ "-fno-signed-bitfields", "" },
{ "-fno-unsigned-bitfields","" },
- { "-fsigned-char",
+ { "-fsigned-char",
N_("Make 'char' be signed by default") },
- { "-funsigned-char",
+ { "-funsigned-char",
N_("Make 'char' be unsigned by default") },
{ "-fno-signed-char", "" },
{ "-fno-unsigned-char", "" },
{ "-fasm", "" },
- { "-fno-asm",
+ { "-fno-asm",
N_("Do not recognize the 'asm' keyword") },
{ "-fbuiltin", "" },
- { "-fno-builtin",
+ { "-fno-builtin",
N_("Do not recognize any built in functions") },
- { "-fhosted",
+ { "-fhosted",
N_("Assume normal C execution environment") },
{ "-fno-hosted", "" },
{ "-ffreestanding",
N_("Assume that standard libraries & main might not exist") },
{ "-fno-freestanding", "" },
- { "-fcond-mismatch",
+ { "-fcond-mismatch",
N_("Allow different types as args of ? operator") },
{ "-fno-cond-mismatch", "" },
- { "-fdollars-in-identifiers",
+ { "-fdollars-in-identifiers",
N_("Allow the use of $ inside identifiers") },
{ "-fno-dollars-in-identifiers", "" },
{ "-fpreprocessed", "" },
{ "-fno-preprocessed", "" },
- { "-fshort-double",
+ { "-fshort-double",
N_("Use the same size for double as for float") },
{ "-fno-short-double", "" },
- { "-fshort-enums",
+ { "-fshort-enums",
N_("Use the smallest fitting integer to hold enums") },
{ "-fno-short-enums", "" },
- { "-fshort-wchar",
+ { "-fshort-wchar",
N_("Override the underlying type for wchar_t to `unsigned short'") },
{ "-fno-short-wchar", "" },
- { "-Wall",
+ { "-Wall",
N_("Enable most warning messages") },
{ "-Wbad-function-cast",
N_("Warn about casting functions to incompatible types") },
{ "-Wmissing-format-attribute",
N_("Warn about functions which might be candidates for format attributes") },
{ "-Wno-missing-format-attribute", "" },
- { "-Wcast-qual",
+ { "-Wcast-qual",
N_("Warn about casts which discard qualifiers") },
{ "-Wno-cast-qual", "" },
- { "-Wchar-subscripts",
+ { "-Wchar-subscripts",
N_("Warn about subscripts whose type is 'char'") },
{ "-Wno-char-subscripts", "" },
- { "-Wcomment",
+ { "-Wcomment",
N_("Warn if nested comments are detected") },
{ "-Wno-comment", "" },
- { "-Wcomments",
+ { "-Wcomments",
N_("Warn if nested comments are detected") },
{ "-Wno-comments", "" },
- { "-Wconversion",
+ { "-Wconversion",
N_("Warn about possibly confusing type conversions") },
{ "-Wno-conversion", "" },
{ "-Wdiv-by-zero", "" },
- { "-Wno-div-by-zero",
+ { "-Wno-div-by-zero",
N_("Do not warn about compile-time integer division by zero") },
- { "-Wfloat-equal",
+ { "-Wfloat-equal",
N_("Warn about testing equality of floating point numbers") },
{ "-Wno-float-equal", "" },
- { "-Wformat",
+ { "-Wformat",
N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
{ "-Wno-format", "" },
{ "-Wformat-extra-args", "" },
{ "-Wno-format-extra-args",
N_("Don't warn about too many arguments to format functions") },
- { "-Wformat-nonliteral",
+ { "-Wformat-nonliteral",
N_("Warn about non-string-literal format strings") },
{ "-Wno-format-nonliteral", "" },
{ "-Wformat-security",
N_("Warn about implicit function declarations") },
{ "-Wno-implicit-function-declaration", "" },
{ "-Werror-implicit-function-declaration", "" },
- { "-Wimplicit-int",
+ { "-Wimplicit-int",
N_("Warn when a declaration does not specify a type") },
{ "-Wno-implicit-int", "" },
{ "-Wimplicit", "" },
{ "-Wno-implicit", "" },
- { "-Wimport",
+ { "-Wimport",
N_("Warn about the use of the #import directive") },
{ "-Wno-import", "" },
{ "-Wlong-long","" },
- { "-Wno-long-long",
+ { "-Wno-long-long",
N_("Do not warn about using 'long long' when -pedantic") },
- { "-Wmain",
+ { "-Wmain",
N_("Warn about suspicious declarations of main") },
{ "-Wno-main", "" },
{ "-Wmissing-braces",
{ "-Wmissing-declarations",
N_("Warn about global funcs without previous declarations") },
{ "-Wno-missing-declarations", "" },
- { "-Wmissing-prototypes",
+ { "-Wmissing-prototypes",
N_("Warn about global funcs without prototypes") },
{ "-Wno-missing-prototypes", "" },
- { "-Wmultichar",
+ { "-Wmultichar",
N_("Warn about use of multicharacter literals") },
{ "-Wno-multichar", "" },
- { "-Wnested-externs",
+ { "-Wnested-externs",
N_("Warn about externs not at file scope level") },
{ "-Wno-nested-externs", "" },
- { "-Wparentheses",
+ { "-Wparentheses",
N_("Warn about possible missing parentheses") },
{ "-Wno-parentheses", "" },
- { "-Wpointer-arith",
+ { "-Wpointer-arith",
N_("Warn about function pointer arithmetic") },
{ "-Wno-pointer-arith", "" },
{ "-Wredundant-decls",
{ "-Wsequence-point",
N_("Warn about possible violations of sequence point rules") },
{ "-Wno-sequence-point", "" },
- { "-Wsign-compare",
+ { "-Wsign-compare",
N_("Warn about signed/unsigned comparisons") },
{ "-Wno-sign-compare", "" },
- { "-Wstrict-prototypes",
+ { "-Wstrict-prototypes",
N_("Warn about non-prototyped function decls") },
{ "-Wno-strict-prototypes", "" },
- { "-Wtraditional",
+ { "-Wtraditional",
N_("Warn about constructs whose meanings change in ISO C") },
{ "-Wno-traditional", "" },
- { "-Wtrigraphs",
+ { "-Wtrigraphs",
N_("Warn when trigraphs are encountered") },
{ "-Wno-trigraphs", "" },
{ "-Wundef", "" },
{ "-Wno-undef", "" },
- { "-Wunknown-pragmas",
+ { "-Wunknown-pragmas",
N_("Warn about unrecognized pragmas") },
{ "-Wno-unknown-pragmas", "" },
- { "-Wwrite-strings",
+ { "-Wwrite-strings",
N_("Mark strings as 'const char *'") },
{ "-Wno-write-strings", "" },
const int value;
const char *const description;
}
-target_switches [] = TARGET_SWITCHES;
+target_switches[] = TARGET_SWITCHES;
/* This table is similar, but allows the switch to have a value. */
const char **const variable;
const char *const description;
}
-target_options [] = TARGET_OPTIONS;
+target_options[] = TARGET_OPTIONS;
#endif
\f
/* Options controlling warnings. */
int warn_missing_noreturn;
-/* Nonzero means warn about uses of __attribute__((deprecated))
+/* Nonzero means warn about uses of __attribute__((deprecated))
declarations. */
int warn_deprecated_decl = 1;
-ffast-math and -fno-fast-math imply. */
void
-set_fast_math_flags ()
+set_fast_math_flags (int set)
{
- flag_trapping_math = 0;
- flag_unsafe_math_optimizations = 1;
- flag_errno_math = 0;
+ flag_trapping_math = !set;
+ flag_unsafe_math_optimizations = set;
+ flag_errno_math = !set;
}
-void
-set_no_fast_math_flags ()
+/* Return true iff flags are set as if -ffast-math. */
+bool
+fast_math_flags_set_p ()
{
- flag_trapping_math = 1;
- flag_unsafe_math_optimizations = 0;
- flag_errno_math = 1;
+ return (!flag_trapping_math
+ && flag_unsafe_math_optimizations
+ && !flag_errno_math);
}
\f
int len;
{
int i;
- for (i = 2; i < 6 && len > i; i++)
+ for (i = 2; i < 6 && len > i; i++)
{
if (name[len - i] == '.')
{
while (na > input_name)
{
if (IS_DIR_SEPARATOR (na[-1]))
- break;
+ break;
na--;
}
{
alias = TREE_VALUE (TREE_VALUE (alias));
alias = get_identifier (TREE_STRING_POINTER (alias));
- assemble_alias (decl, alias);
+ assemble_alias (decl, alias);
}
}
timevar_push (TV_VARCONST);
if (asmspec)
- make_decl_rtl (decl, 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. */
distinguish between the return value of this function and the
return value of called functions. Also, we can remove all SETs
of subregs of hard registers; they are only here because of
- integrate. Also, we can now initialize pseudos intended to
+ integrate. Also, we can now initialize pseudos intended to
carry magic hard reg data throughout the function. */
rtx_equal_function_value_matters = 0;
purge_hard_subreg_sets (get_insns ());
|| errorcount || sorrycount)
goto exit_rest_of_compilation;
+ timevar_push (TV_JUMP);
+ open_dump_file (DFI_sibling, decl);
+ insns = get_insns ();
+ rebuild_jump_labels (insns);
+ find_exception_handler_labels ();
+ find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
+
+ delete_unreachable_blocks ();
+
+ /* Turn NOTE_INSN_PREDICTIONs into branch predictions. */
+ note_prediction_to_br_prob ();
+
/* We may have potential sibling or tail recursion sites. Select one
(of possibly multiple) methods of performing the call. */
if (flag_optimize_sibling_calls)
{
- timevar_push (TV_JUMP);
- open_dump_file (DFI_sibling, decl);
-
+ rtx insn;
optimize_sibling_and_tail_recursive_calls ();
- close_dump_file (DFI_sibling, print_rtl, get_insns ());
- timevar_pop (TV_JUMP);
+ /* There is pass ordering problem - we must lower NOTE_INSN_PREDICTION
+ notes before simplifying cfg and we must do lowering after sibcall
+ that unhides parts of RTL chain and cleans up the CFG.
+
+ Until sibcall is replaced by tree-level optimizer, lets just
+ sweep away the NOTE_INSN_PREDICTION notes that leaked out. */
+ for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
+ if (GET_CODE (insn) == NOTE
+ && NOTE_LINE_NUMBER (insn) == NOTE_INSN_PREDICTION)
+ delete_insn (insn);
}
+ close_dump_file (DFI_sibling, print_rtl, get_insns ());
+ timevar_pop (TV_JUMP);
/* Complete generation of exception handling code. */
find_exception_handler_labels ();
open_dump_file (DFI_ssa_dce, decl);
insns = get_insns ();
- ssa_eliminate_dead_code();
+ ssa_eliminate_dead_code ();
close_dump_file (DFI_ssa_dce, print_rtl_with_bb, insns);
timevar_pop (TV_SSA_DCE);
timevar_push (TV_IFCVT);
if (flag_if_conversion)
- if_convert (0);
+ if_convert (0);
timevar_pop (TV_IFCVT);
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
close_dump_file (DFI_null, print_rtl_with_bb, insns);
close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
/* Do branch profiling and static profile estimation passes. */
- if (optimize > 0 || profile_arc_flag || flag_test_coverage
- || flag_branch_probabilities)
+ if (optimize > 0 || cfun->arc_profile || flag_branch_probabilities)
{
struct loops loops;
timevar_push (TV_BRANCH_PROB);
open_dump_file (DFI_bp, decl);
- if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
+ if (cfun->arc_profile || flag_branch_probabilities)
branch_prob ();
/* Discover and record the loop depth at the head of each basic
cleanup_cfg (CLEANUP_EXPENSIVE);
if (flag_if_conversion)
if_convert (0);
- timevar_pop(TV_IFCVT);
+ timevar_pop (TV_IFCVT);
timevar_pop (TV_JUMP);
/* CFG is no longer maintained up-to-date. */
open_dump_file (DFI_rnreg, decl);
if (flag_rename_registers)
- regrename_optimize ();
+ regrename_optimize ();
if (flag_cprop_registers)
- copyprop_hardreg_forward ();
+ copyprop_hardreg_forward ();
close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
timevar_pop (TV_RENAME_REGISTERS);
timevar_push (TV_REORDER_BLOCKS);
open_dump_file (DFI_bbro, decl);
- /* Last attempt to optimize CFG, as scheduling, peepholing
- and insn splitting possibly introduced more crossjumping
- oppurtuntities. */
+ /* Last attempt to optimize CFG, as scheduling, peepholing and insn
+ splitting possibly introduced more crossjumping oppurtuntities.
+ Except that we can't actually run crossjumping without running
+ another DCE pass, which we can't do after reg-stack. */
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK
| (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
if (flag_reorder_blocks)
longer valid. */
init_insn_lengths ();
- /* Clear out the real_constant_chain before some of the rtx's
- it runs through become garbage. */
- clear_const_double_mem ();
-
/* Show no temporary slots allocated. */
init_temp_slots ();
{
const char *description = f_options[i].description;
- if (description != NULL && * description != 0)
+ if (description != NULL && *description != 0)
printf (" -f%-21s %s\n",
f_options[i].string, _(description));
}
for (i = LAST_PARAM; i--;)
{
const char *description = compiler_params[i].help;
- const int length = 21-strlen(compiler_params[i].option);
+ const int length = 21 - strlen (compiler_params[i].option);
- if (description != NULL && * description != 0)
+ if (description != NULL && *description != 0)
printf (" --param %s=<value>%.*s%s\n",
compiler_params[i].option,
length > 0 ? length : 1, " ",
{
const char *description = W_options[i].description;
- if (description != NULL && * description != 0)
+ if (description != NULL && *description != 0)
printf (" -W%-21s %s\n",
W_options[i].string, _(description));
}
printf (_(" -Wunused Enable unused warnings\n"));
printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
printf (_(" -p Enable function profiling\n"));
-#if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
- printf (_(" -a Enable block profiling \n"));
-#endif
-#if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
- printf (_(" -ax Enable jump profiling \n"));
-#endif
printf (_(" -o <file> Place output into <file> \n"));
printf (_("\
-G <number> Put global and static data smaller than <number>\n\
if (extra_warnings)
printf (_(" -m%-23.23s [undocumented]\n"), option);
}
- else if (* description != 0)
+ else if (*description != 0)
doc += printf (" -m%-23.23s %s\n", option, _(description));
}
if (extra_warnings)
printf (_(" -m%-23.23s [undocumented]\n"), option);
}
- else if (* description != 0)
+ else if (*description != 0)
doc += printf (" -m%-23.23s %s\n", option, _(description));
}
#endif
flag_print_asm_name = 1;
break;
case 'P':
- flag_dump_rtl_in_asm = 1;
- flag_print_asm_name = 1;
- break;
+ flag_dump_rtl_in_asm = 1;
+ flag_print_asm_name = 1;
+ break;
case 'v':
graph_dump_format = vcg;
break;
}
if (!strcmp (arg, "fast-math"))
- set_fast_math_flags ();
+ set_fast_math_flags (1);
else if (!strcmp (arg, "no-fast-math"))
- set_no_fast_math_flags ();
+ set_fast_math_flags (0);
else if ((option_value = skip_leading_substring (arg, "inline-limit-"))
|| (option_value = skip_leading_substring (arg, "inline-limit=")))
{
stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
}
else if ((option_value
- = skip_leading_substring (arg, "message-length=")))
+ = skip_leading_substring (arg, "message-length=")))
output_set_maximum_length
(&global_dc->buffer, read_integral_parameter
(option_value, arg - 2, diagnostic_line_cutoff (global_dc)));
= skip_leading_substring (arg, "diagnostics-show-location=")))
{
if (!strcmp (option_value, "once"))
- diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
+ diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
else if (!strcmp (option_value, "every-line"))
- diagnostic_prefixing_rule (global_dc)
- = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
+ diagnostic_prefixing_rule (global_dc)
+ = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
else
error ("unrecognized option `%s'", arg - 2);
}
decode_g_option (arg)
const char *arg;
{
- static unsigned level=0;
+ static unsigned level = 0;
/* A lot of code assumes write_symbols == NO_DEBUG if the
debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
of what debugging type has been selected). This records the
else
{
if (asm_file_name == 0)
- {
- int len = strlen (dump_base_name);
- char *dumpname = (char *) xmalloc (len + 6);
- memcpy (dumpname, dump_base_name, len + 1);
- strip_off_ending (dumpname, len);
- strcat (dumpname, ".s");
- asm_file_name = dumpname;
- }
+ {
+ int len = strlen (dump_base_name);
+ char *dumpname = (char *) xmalloc (len + 6);
+ memcpy (dumpname, dump_base_name, len + 1);
+ strip_off_ending (dumpname, len);
+ strcat (dumpname, ".s");
+ asm_file_name = dumpname;
+ }
if (!strcmp (asm_file_name, "-"))
- asm_out_file = stdout;
+ asm_out_file = stdout;
else
- asm_out_file = fopen (asm_file_name, "w");
+ asm_out_file = fopen (asm_file_name, "w");
if (asm_out_file == 0)
fatal_io_error ("can't open %s for writing", asm_file_name);
}
#ifdef IO_BUFFER_SIZE
setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
- _IOFBF, IO_BUFFER_SIZE);
+ _IOFBF, IO_BUFFER_SIZE);
#endif
if (!flag_syntax_only)
flag_strict_aliasing = 1;
flag_delete_null_pointer_checks = 1;
flag_reorder_blocks = 1;
+ flag_reorder_functions = 1;
}
if (optimize >= 3)
error ("profiling does not work without a frame pointer");
flag_omit_frame_pointer = 0;
}
-
+
user_label_prefix = USER_LABEL_PREFIX;
if (flag_leading_underscore != -1)
{
provide a dummy function context for them. */
init_dummy_function_start ();
init_expmed ();
- init_expr_once ();
if (flag_caller_saves)
init_caller_save ();
expand_dummy_function_end ();
front end is initialized. */
init_eh ();
init_optabs ();
+ init_expr_once ();
/* Put an entry on the input file stack for the main input file. */
push_srcloc (input_filename, 0);
hex_init ();
/* Initialization of GCC's environment, and diagnostics. */
- general_init (argv [0]);
+ general_init (argv[0]);
/* Parse the options and do minimal processing; basically just
enough to default flags appropriately. */
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