- timevar_push (TV_SYMOUT);
-#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
- if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
- dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
-#endif
-#ifdef SDB_DEBUGGING_INFO
- if (write_symbols == SDB_DEBUG)
- sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
-#endif
-#ifdef DWARF2_DEBUGGING_INFO
- if ((write_symbols == DWARF2_DEBUG
- || write_symbols == VMS_AND_DWARF2_DEBUG)
- && toplev)
- dwarf2out_decl (TYPE_STUB_DECL (type));
-#endif
- timevar_pop (TV_SYMOUT);
-}
-
-/* This is called from finish_function (within yyparse)
- after each top-level definition is parsed.
- It is supposed to compile that function or variable
- and output the assembler code for it.
- After we return, the tree storage is freed. */
-
-void
-rest_of_compilation (decl)
- tree decl;
-{
- rtx insns;
- int tem;
- int failure = 0;
- int rebuild_label_notes_after_reload;
- int register_life_up_to_date;
- int cleanup_crossjump;
-
- timevar_push (TV_REST_OF_COMPILATION);
-
- /* Now that we're out of the frontend, 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;
-
- /* First, make sure that NOTE_BLOCK is set correctly for each
- NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
- if (!cfun->x_whole_function_mode_p)
- identify_blocks ();
-
- /* In function-at-a-time mode, we do not attempt to keep the BLOCK
- tree in sensible shape. So, we just recalculate it here. */
- if (cfun->x_whole_function_mode_p)
- reorder_blocks ();
-
- init_flow ();
-
- /* If we are reconsidering an inline function
- at the end of compilation, skip the stuff for making it inline. */
-
- if (DECL_SAVED_INSNS (decl) == 0)
- {
- int inlinable = 0;
- tree parent;
- const char *lose;
-
- /* If this is nested inside an inlined external function, pretend
- it was only declared. Since we cannot inline such functions,
- generating code for this one is not only not necessary but will
- confuse some debugging output writers. */
- for (parent = DECL_CONTEXT (current_function_decl);
- parent != NULL_TREE;
- parent = get_containing_scope (parent))
- if (TREE_CODE (parent) == FUNCTION_DECL
- && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
- {
- DECL_INITIAL (decl) = 0;
- goto exit_rest_of_compilation;
- }
- else if (TYPE_P (parent))
- /* A function in a local class should be treated normally. */
- break;
-
- /* If requested, consider whether to make this function inline. */
- if ((DECL_INLINE (decl) && !flag_no_inline)
- || flag_inline_functions)
- {
- timevar_push (TV_INTEGRATION);
- lose = function_cannot_inline_p (decl);
- timevar_pop (TV_INTEGRATION);
- if (lose || ! optimize)
- {
- if (warn_inline && DECL_INLINE (decl))
- warning_with_decl (decl, lose);
- DECL_ABSTRACT_ORIGIN (decl) = 0;
- /* Don't really compile an extern inline function.
- If we can't make it inline, pretend
- it was only declared. */
- if (DECL_EXTERNAL (decl))
- {
- DECL_INITIAL (decl) = 0;
- goto exit_rest_of_compilation;
- }
- }
- else
- /* ??? Note that this has the effect of making it look
- like "inline" was specified for a function if we choose
- to inline it. This isn't quite right, but it's
- probably not worth the trouble to fix. */
- inlinable = DECL_INLINE (decl) = 1;
- }
-
- insns = get_insns ();
-
- /* Dump the rtl code if we are dumping rtl. */
-
- if (open_dump_file (DFI_rtl, decl))
- {
- if (DECL_SAVED_INSNS (decl))
- fprintf (rtl_dump_file, ";; (integrable)\n\n");
- close_dump_file (DFI_rtl, print_rtl, 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 function is inline, and we don't yet know whether to
- compile it by itself, defer decision till end of compilation.
- finish_compilation will call rest_of_compilation again
- for those functions that need to be output. Also defer those
- functions that we are supposed to defer. */
-
- if (inlinable
- || (DECL_INLINE (decl)
- && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
- && ! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))
- && ! flag_keep_inline_functions)
- || DECL_EXTERNAL (decl))))
- DECL_DEFER_OUTPUT (decl) = 1;
-
- if (DECL_INLINE (decl))
- /* DWARF wants separate debugging info for abstract and
- concrete instances of all inline functions, including those
- declared inline but not inlined, and those inlined even
- though they weren't declared inline. Conveniently, that's
- what DECL_INLINE means at this point. */
- (*debug_hooks->deferred_inline_function) (decl);
-
- if (DECL_DEFER_OUTPUT (decl))
- {
- /* If -Wreturn-type, we have to do a bit of compilation. We just
- want to call cleanup the cfg to figure out whether or not we can
- fall off the end of the function; we do the minimum amount of
- work necessary to make that safe. */
- if (warn_return_type)
- {
- int saved_optimize = optimize;
-
- optimize = 0;
- rebuild_jump_labels (insns);
- find_exception_handler_labels ();
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_PRE_SIBCALL | CLEANUP_PRE_LOOP);
- optimize = saved_optimize;
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- }
-
- current_function_nothrow = nothrow_function_p ();
- if (current_function_nothrow)
- /* Now we know that this can't throw; set the flag for the benefit
- of other functions later in this translation unit. */
- TREE_NOTHROW (current_function_decl) = 1;
-
- timevar_push (TV_INTEGRATION);
- save_for_inline (decl);
- timevar_pop (TV_INTEGRATION);
- DECL_SAVED_INSNS (decl)->inlinable = inlinable;
- goto exit_rest_of_compilation;
- }
-
- /* If specified extern inline but we aren't inlining it, we are
- done. This goes for anything that gets here with DECL_EXTERNAL
- set, not just things with DECL_INLINE. */
- if (DECL_EXTERNAL (decl))
- goto exit_rest_of_compilation;
- }
-
- /* If we're emitting a nested function, make sure its parent gets
- emitted as well. Doing otherwise confuses debug info. */
- {
- tree parent;
- for (parent = DECL_CONTEXT (current_function_decl);
- parent != NULL_TREE;
- parent = get_containing_scope (parent))
- if (TREE_CODE (parent) == FUNCTION_DECL)
- TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1;
- }
-
- /* 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))
- (*debug_hooks->outlining_inline_function) (decl);
-
- /* Remove any notes we don't need. That will make iterating
- over the instruction sequence faster, and allow the garbage
- collector to reclaim the memory used by the notes. */
- remove_unnecessary_notes ();
- reorder_blocks ();
-
- ggc_collect ();
-
- /* Initialize some variables used by the optimizers. */
- init_function_for_compilation ();
-
- if (! DECL_DEFER_OUTPUT (decl))
- TREE_ASM_WRITTEN (decl) = 1;
-
- /* Now that integrate will no longer see our rtl, we need not
- 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
- carry magic hard reg data throughout the function. */
- rtx_equal_function_value_matters = 0;
- purge_hard_subreg_sets (get_insns ());
-
- /* Early return if there were errors. We can run afoul of our
- consistency checks, and there's not really much point in fixing them.
- Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */
- if (((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
- || errorcount || sorrycount)
- goto exit_rest_of_compilation;
-
- /* 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);
-
- optimize_sibling_and_tail_recursive_calls ();
-
- close_dump_file (DFI_sibling, print_rtl, get_insns ());
- timevar_pop (TV_JUMP);
- }
-
- /* Complete generation of exception handling code. */
- find_exception_handler_labels ();
- if (doing_eh (0))
- {
- timevar_push (TV_JUMP);
- open_dump_file (DFI_eh, decl);
-
- finish_eh_generation ();
-
- close_dump_file (DFI_eh, print_rtl, get_insns ());
- timevar_pop (TV_JUMP);
- }
-
- /* Delay emitting hard_reg_initial_value sets until after EH landing pad
- generation, which might create new sets. */
- emit_initial_value_sets ();
-
-#ifdef FINALIZE_PIC
- /* If we are doing position-independent code generation, now
- is the time to output special prologues and epilogues.
- We do not want to do this earlier, because it just clutters
- up inline functions with meaningless insns. */
- if (flag_pic)
- FINALIZE_PIC;
-#endif
-
- insns = get_insns ();
-
- /* Copy any shared structure that should not be shared. */
- unshare_all_rtl (current_function_decl, insns);
-
-#ifdef SETJMP_VIA_SAVE_AREA
- /* This must be performed before virtual register instantiation. */
- if (current_function_calls_alloca)
- optimize_save_area_alloca (insns);
-#endif
-
- /* Instantiate all virtual registers. */
- instantiate_virtual_regs (current_function_decl, insns);
-
- open_dump_file (DFI_jump, decl);
-
- /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
- are initialized and to compute whether control can drop off the end
- of the function. */
-
- timevar_push (TV_JUMP);
- /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
- before jump optimization switches branch directions. */
- expected_value_to_br_prob ();
-
- reg_scan (insns, max_reg_num (), 0);
- rebuild_jump_labels (insns);
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_PRE_LOOP);
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- copy_loop_headers (insns);
- purge_line_number_notes (insns);
-
- timevar_pop (TV_JUMP);
-
- /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
- if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
- {
- close_dump_file (DFI_jump, print_rtl, insns);
- 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)
- {
- /* Convert to SSA form. */
-
- timevar_push (TV_TO_SSA);
- open_dump_file (DFI_ssa, decl);
-
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- 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 ();
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- }
-
- timevar_push (TV_JUMP);
-
- if (optimize > 0)
- {
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP
- | (flag_thread_jumps ? CLEANUP_THREADING : 0));
-
- /* ??? Run if-conversion before delete_null_pointer_checks,
- since the later does not preserve the CFG. This should
- be changed -- no since converting if's that are going to
- be deleted. */
- timevar_push (TV_IFCVT);
- if_convert (0);
- timevar_pop (TV_IFCVT);
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- /* Try to identify useless null pointer tests and delete them. */
- if (flag_delete_null_pointer_checks)
- delete_null_pointer_checks (insns);
- }
-
- /* Jump optimization, and the removal of NULL pointer checks, may
- have reduced the number of instructions substantially. CSE, and
- future passes, allocate arrays whose dimensions involve the
- maximum instruction UID, so if we can reduce the maximum UID
- we'll save big on memory. */
- renumber_insns (rtl_dump_file);
- timevar_pop (TV_JUMP);
-
- close_dump_file (DFI_jump, print_rtl, insns);
-
- ggc_collect ();
-
- /* Perform common subexpression elimination.
- Nonzero value from `cse_main' means that jumps were simplified
- and some code may now be unreachable, so do
- jump optimization again. */
-
- if (optimize > 0)
- {
- open_dump_file (DFI_cse, decl);
- timevar_push (TV_CSE);
-
- reg_scan (insns, max_reg_num (), 1);
-
- tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
-
- /* If we are not running more CSE passes, then we are no longer
- 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 || optimize > 1)
- {
- timevar_push (TV_JUMP);
- rebuild_jump_labels (insns);
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
- timevar_pop (TV_JUMP);
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- }
-
- /* Run this after jump optmizations remove all the unreachable code
- so that unreachable code will not keep values live. */
- delete_trivially_dead_insns (insns, max_reg_num (), 0);
-
- /* Try to identify useless null pointer tests and delete them. */
- if (flag_delete_null_pointer_checks || flag_thread_jumps)
- {
- timevar_push (TV_JUMP);
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
-
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP
- | (flag_thread_jumps ? CLEANUP_THREADING : 0));
-
- if (flag_delete_null_pointer_checks)
- delete_null_pointer_checks (insns);
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- timevar_pop (TV_JUMP);
- }
-
- /* The second pass of jump optimization is likely to have
- removed a bunch more instructions. */
- renumber_insns (rtl_dump_file);
-
- timevar_pop (TV_CSE);
- close_dump_file (DFI_cse, print_rtl, insns);
- }
-
- open_dump_file (DFI_addressof, decl);
-
- purge_addressof (insns);
- reg_scan (insns, max_reg_num (), 1);
-
- close_dump_file (DFI_addressof, print_rtl, insns);
-
- ggc_collect ();
-
- /* Perform global cse. */
-
- if (optimize > 0 && flag_gcse)
- {
- int save_csb, save_cfj;
- int tem2 = 0;
-
- timevar_push (TV_GCSE);
- open_dump_file (DFI_gcse, decl);
-
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
- tem = gcse_main (insns, rtl_dump_file);
- rebuild_jump_labels (insns);
-
- save_csb = flag_cse_skip_blocks;
- save_cfj = flag_cse_follow_jumps;
- flag_cse_skip_blocks = flag_cse_follow_jumps = 0;
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- /* If -fexpensive-optimizations, re-run CSE to clean up things done
- by gcse. */
- if (flag_expensive_optimizations)
- {
- timevar_push (TV_CSE);
- reg_scan (insns, max_reg_num (), 1);
- tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
- timevar_pop (TV_CSE);
- cse_not_expected = !flag_rerun_cse_after_loop;
- }
-
- /* If gcse or cse altered any jumps, rerun jump optimizations to clean
- things up. Then possibly re-run CSE again. */
- while (tem || tem2)
- {
- tem = tem2 = 0;
- timevar_push (TV_JUMP);
- rebuild_jump_labels (insns);
- delete_trivially_dead_insns (insns, max_reg_num (), 0);
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- timevar_pop (TV_JUMP);
-
- if (flag_expensive_optimizations)
- {
- timevar_push (TV_CSE);
- reg_scan (insns, max_reg_num (), 1);
- tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
- timevar_pop (TV_CSE);
- }
- }
-
- close_dump_file (DFI_gcse, print_rtl, insns);
- timevar_pop (TV_GCSE);
-
- ggc_collect ();
- flag_cse_skip_blocks = save_csb;
- flag_cse_follow_jumps = save_cfj;
- }
-
- /* Move constant computations out of loops. */
-
- if (optimize > 0)
- {
- timevar_push (TV_LOOP);
- open_dump_file (DFI_loop, decl);
- free_bb_for_insn ();
-
- if (flag_rerun_loop_opt)
- {
- cleanup_barriers ();
-
- /* We only want to perform unrolling once. */
- loop_optimize (insns, rtl_dump_file, LOOP_FIRST_PASS);
-
- /* The first call to loop_optimize makes some instructions
- trivially dead. We delete those instructions now in the
- hope that doing so will make the heuristics in loop work
- better and possibly speed up compilation. */
- delete_trivially_dead_insns (insns, max_reg_num (), 0);
-
- /* The regscan pass is currently necessary as the alias
- analysis code depends on this information. */
- reg_scan (insns, max_reg_num (), 1);
- }
- cleanup_barriers ();
- loop_optimize (insns, rtl_dump_file,
- (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT
- | (flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0));
-
- close_dump_file (DFI_loop, print_rtl, insns);
- timevar_pop (TV_LOOP);
-
- ggc_collect ();
- }
-
- if (optimize > 0)
- {
- timevar_push (TV_CSE2);
- open_dump_file (DFI_cse2, decl);
-
- if (flag_rerun_cse_after_loop)
- {
- /* Running another jump optimization pass before the second
- cse pass sometimes simplifies the RTL enough to allow
- the second CSE pass to do a better job. Jump_optimize can change
- max_reg_num so we must rerun reg_scan afterwards.
- ??? Rework to not call reg_scan so often. */
- timevar_push (TV_JUMP);
-
- /* The previous call to loop_optimize makes some instructions
- trivially dead. We delete those instructions now in the
- hope that doing so will make the heuristics in jump work
- better and possibly speed up compilation. */
- delete_trivially_dead_insns (insns, max_reg_num (), 0);
-
- reg_scan (insns, max_reg_num (), 0);
-
- timevar_push (TV_IFCVT);
-
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE);
- if_convert (0);
-
- timevar_pop(TV_IFCVT);
-
- timevar_pop (TV_JUMP);
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- reg_scan (insns, max_reg_num (), 0);
- tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
-
- if (tem)
- {
- timevar_push (TV_JUMP);
- rebuild_jump_labels (insns);
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg (CLEANUP_EXPENSIVE);
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
- timevar_pop (TV_JUMP);
- }
- }
-
- close_dump_file (DFI_cse2, print_rtl, insns);
- timevar_pop (TV_CSE2);
-
- ggc_collect ();
- }
-
- cse_not_expected = 1;
-
- regclass_init ();
-
- /* Do control and data flow analysis; wrote some of the results to
- the dump file. */
-
- timevar_push (TV_FLOW);
- open_dump_file (DFI_cfg, decl);
-
- find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
- cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0)
- | (flag_thread_jumps ? CLEANUP_THREADING : 0));
- check_function_return_warnings ();
-
- /* It may make more sense to mark constant functions after dead code is
- eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs
- may insert code making function non-constant, but we still must consider
- it as constant, otherwise -fbranch-probabilities will not read data back.
-
- life_analyzis rarely eliminates modification of external memory.
- */
- mark_constant_function ();
-
- close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
-
- if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
- {
- timevar_push (TV_BRANCH_PROB);
- open_dump_file (DFI_bp, decl);
-
- branch_prob ();
-
- close_dump_file (DFI_bp, print_rtl_with_bb, insns);
- timevar_pop (TV_BRANCH_PROB);
- }
-
- open_dump_file (DFI_life, decl);
- if (optimize)
- {
- struct loops loops;
-
- /* 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);
-
- if (rtl_dump_file)
- flow_loops_dump (&loops, rtl_dump_file, NULL, 0);
-
- /* Estimate using heuristics if no profiling info is available. */
- if (flag_guess_branch_prob)
- estimate_probability (&loops);
-
- flow_loops_free (&loops);
- }
- life_analysis (insns, rtl_dump_file, PROP_FINAL);
- timevar_pop (TV_FLOW);
-
- no_new_pseudos = 1;
-
- if (warn_uninitialized || extra_warnings)
- {
- uninitialized_vars_warning (DECL_INITIAL (decl));
- if (extra_warnings)
- setjmp_args_warning ();
- }
-
- if (optimize)
- {
- if (initialize_uninitialized_subregs ())
- {
- /* Insns were inserted, so things might look a bit different. */
- insns = get_insns ();
- life_analysis (insns, rtl_dump_file,
- (PROP_LOG_LINKS | PROP_REG_INFO | PROP_DEATH_NOTES));
- }
- }
-
- close_dump_file (DFI_life, print_rtl_with_bb, insns);
-
- ggc_collect ();
-
- /* If -opt, try combining insns through substitution. */
-
- if (optimize > 0)
- {
- int rebuild_jump_labels_after_combine = 0;
-
- timevar_push (TV_COMBINE);
- open_dump_file (DFI_combine, decl);
-
- rebuild_jump_labels_after_combine
- = combine_instructions (insns, max_reg_num ());
-
- /* Always purge dead edges, as we may eliminate an insn throwing
- exception. */
- rebuild_jump_labels_after_combine |= purge_all_dead_edges (true);
-
- /* Combining insns may have turned an indirect jump into a
- direct jump. Rebuid the JUMP_LABEL fields of jumping
- instructions. */
- if (rebuild_jump_labels_after_combine)
- {
- timevar_push (TV_JUMP);
- rebuild_jump_labels (insns);
- timevar_pop (TV_JUMP);
-
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE);
- }
-
- close_dump_file (DFI_combine, print_rtl_with_bb, insns);
- timevar_pop (TV_COMBINE);
-
- ggc_collect ();
- }
-
- /* Rerun if-conversion, as combine may have simplified things enough to
- now meet sequence length restrictions. */
- if (optimize > 0)
- {
- timevar_push (TV_IFCVT);
- open_dump_file (DFI_ce, decl);
-
- no_new_pseudos = 0;
- if_convert (1);
- no_new_pseudos = 1;
-
- close_dump_file (DFI_ce, print_rtl_with_bb, insns);
- timevar_pop (TV_IFCVT);
- }
-
- /* Register allocation pre-pass, to reduce number of moves
- necessary for two-address machines. */
- if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
- {
- timevar_push (TV_REGMOVE);
- open_dump_file (DFI_regmove, decl);
-
- regmove_optimize (insns, max_reg_num (), rtl_dump_file);
-
- close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
- timevar_pop (TV_REGMOVE);
-
- ggc_collect ();
- }
-
- /* Do unconditional splitting before register allocation to allow machine
- description to add extra information not needed previously. */
- split_all_insns (1);
-
- /* Any of the several passes since flow1 will have munged register
- lifetime data a bit. */
- register_life_up_to_date = 0;
-
-#ifdef OPTIMIZE_MODE_SWITCHING
- timevar_push (TV_MODE_SWITCH);
-
- no_new_pseudos = 0;
- if (optimize_mode_switching (NULL))
- {
- /* We did work, and so had to regenerate global life information.
- Take advantage of this and don't re-recompute register life
- information below. */
- register_life_up_to_date = 1;
- }
- no_new_pseudos = 1;
-
- timevar_pop (TV_MODE_SWITCH);
-#endif
-
- timevar_push (TV_SCHED);
-
-#ifdef INSN_SCHEDULING
-
- /* Print function header into sched dump now
- because doing the sched analysis makes some of the dump. */
- if (optimize > 0 && flag_schedule_insns)
- {
- open_dump_file (DFI_sched, decl);
-
- /* Do control and data sched analysis,
- and write some of the results to dump file. */
-
- schedule_insns (rtl_dump_file);
-
- close_dump_file (DFI_sched, print_rtl_with_bb, insns);
-
- /* Register lifetime information was updated as part of verifying
- the schedule. */
- register_life_up_to_date = 1;
- }
-#endif
- timevar_pop (TV_SCHED);
-
- ggc_collect ();
-
- /* Determine if the current function is a leaf before running reload
- since this can impact optimizations done by the prologue and
- epilogue thus changing register elimination offsets. */
- current_function_is_leaf = leaf_function_p ();
-
- timevar_push (TV_LOCAL_ALLOC);
- open_dump_file (DFI_lreg, decl);
-
- /* Allocate pseudo-regs that are used only within 1 basic block.
-
- RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
- jump optimizer after register allocation and reloading are finished. */
-
- if (! register_life_up_to_date)
- recompute_reg_usage (insns, ! optimize_size);
-
- /* Allocate the reg_renumber array. */
- allocate_reg_info (max_regno, FALSE, TRUE);
-
- /* And the reg_equiv_memory_loc array. */
- reg_equiv_memory_loc = (rtx *) xcalloc (max_regno, sizeof (rtx));
-
- allocate_initial_values (reg_equiv_memory_loc);
-
- regclass (insns, max_reg_num (), rtl_dump_file);
- rebuild_label_notes_after_reload = local_alloc ();
-
- timevar_pop (TV_LOCAL_ALLOC);
-
- if (dump_file[DFI_lreg].enabled)
- {
- timevar_push (TV_DUMP);
-
- dump_flow_info (rtl_dump_file);
- dump_local_alloc (rtl_dump_file);
-
- close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
- timevar_pop (TV_DUMP);
- }
-
- ggc_collect ();
-
- timevar_push (TV_GLOBAL_ALLOC);
- open_dump_file (DFI_greg, decl);
-
- /* If optimizing, allocate remaining pseudo-regs. Do the reload
- pass fixing up any insns that are invalid. */
-
- if (optimize)
- failure = global_alloc (rtl_dump_file);
- else
- {
- build_insn_chain (insns);
- failure = reload (insns, 0);
- }
-
- timevar_pop (TV_GLOBAL_ALLOC);
-
- if (dump_file[DFI_greg].enabled)
- {
- timevar_push (TV_DUMP);
-
- dump_global_regs (rtl_dump_file);
-
- close_dump_file (DFI_greg, print_rtl_with_bb, insns);
- timevar_pop (TV_DUMP);
- }
-
- if (failure)
- goto exit_rest_of_compilation;
-
- ggc_collect ();
-
- open_dump_file (DFI_postreload, decl);
-
- /* Do a very simple CSE pass over just the hard registers. */
- if (optimize > 0)
- {
- timevar_push (TV_RELOAD_CSE_REGS);
- reload_cse_regs (insns);
- 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);
-
- timevar_pop (TV_JUMP);
- }
-
- close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
-
- /* Re-create the death notes which were deleted during reload. */
- timevar_push (TV_FLOW2);
- open_dump_file (DFI_flow2, decl);
-
-#ifdef ENABLE_CHECKING
- verify_flow_info ();
-#endif
-
- /* If optimizing, then go ahead and split insns now. */
- if (optimize > 0)
- split_all_insns (0);
-
- cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
-
- /* 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 (insns);
-
- /* Cross-jumping is O(N^3) on the number of edges, thus trying to
- perform cross-jumping on flow graphs which have a high connectivity
- will take a long time. This is similar to the test to disable GCSE. */
- cleanup_crossjump = CLEANUP_CROSSJUMP;
- if (n_basic_blocks > 1000 && n_edges / n_basic_blocks >= 20)
- {
- if (optimize && warn_disabled_optimization)
- warning ("crossjump disabled: %d > 1000 basic blocks and %d >= 20 edges/basic block",
- n_basic_blocks, n_edges / n_basic_blocks);
- cleanup_crossjump = 0;
- }
-
- if (optimize)
- {
- cleanup_cfg (CLEANUP_EXPENSIVE | cleanup_crossjump);
- life_analysis (insns, rtl_dump_file, PROP_FINAL);
-
- /* This is kind of a heuristic. We need to run combine_stack_adjustments
- even for machines with possibly nonzero RETURN_POPS_ARGS
- and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
- push instructions will have popping returns. */
-#ifndef PUSH_ROUNDING
- if (!ACCUMULATE_OUTGOING_ARGS)
-#endif
- combine_stack_adjustments ();
-
- ggc_collect ();
- }
-
- flow2_completed = 1;
-
- close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
- timevar_pop (TV_FLOW2);
-
-#ifdef HAVE_peephole2
- if (optimize > 0 && flag_peephole2)
- {
- timevar_push (TV_PEEPHOLE2);
- open_dump_file (DFI_peephole2, decl);
-
- peephole2_optimize (rtl_dump_file);
-
- close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
- timevar_pop (TV_PEEPHOLE2);
- }
-#endif
-
- if (optimize > 0 && (flag_rename_registers || flag_cprop_registers))
- {
- timevar_push (TV_RENAME_REGISTERS);
- open_dump_file (DFI_rnreg, decl);
-
- if (flag_rename_registers)
- regrename_optimize ();
- if (flag_cprop_registers)
- copyprop_hardreg_forward ();
-
- close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
- timevar_pop (TV_RENAME_REGISTERS);
- }
-
- if (optimize > 0)
- {
- timevar_push (TV_IFCVT2);
- open_dump_file (DFI_ce2, decl);
-
- if_convert (1);
-
- close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
- timevar_pop (TV_IFCVT2);
- }
-#ifdef STACK_REGS
- if (optimize)
- split_all_insns (1);
-#endif
-
-#ifdef INSN_SCHEDULING
- if (optimize > 0 && flag_schedule_insns_after_reload)
- {
- timevar_push (TV_SCHED2);
- open_dump_file (DFI_sched2, decl);
-
- /* Do control and data sched analysis again,
- and write some more of the results to dump file. */
-
- split_all_insns (1);
-
- schedule_insns (rtl_dump_file);
-
- close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
- timevar_pop (TV_SCHED2);
-
- ggc_collect ();
- }
-#endif
-
-#ifdef LEAF_REGISTERS
- current_function_uses_only_leaf_regs
- = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
-#endif
-
-#ifdef STACK_REGS
- timevar_push (TV_REG_STACK);
- open_dump_file (DFI_stack, decl);
-
- reg_to_stack (insns, rtl_dump_file);
-
- close_dump_file (DFI_stack, print_rtl_with_bb, insns);
- timevar_pop (TV_REG_STACK);
-
- ggc_collect ();
-#endif
- if (optimize > 0)
- {
- timevar_push (TV_REORDER_BLOCKS);
- open_dump_file (DFI_bbro, decl);
-
- /* Last attempt to optimize CFG, as life analysis possibly removed
- some instructions. Note that we can't rerun crossjump at this
- point, because it can turn a switch into a direct branch, which
- can leave the tablejump address calculation in the code, which
- can lead to referencing an undefined label. */
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK);
- if (flag_reorder_blocks)
- {
- reorder_basic_blocks ();
- cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK);
- }
-
- close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
- timevar_pop (TV_REORDER_BLOCKS);
- }
- compute_alignments ();
-
- /* CFG is no longer maintained up-to-date. */
- free_bb_for_insn ();
-
- /* If a machine dependent reorganization is needed, call it. */
-#ifdef MACHINE_DEPENDENT_REORG
- timevar_push (TV_MACH_DEP);
- open_dump_file (DFI_mach, decl);
-
- MACHINE_DEPENDENT_REORG (insns);
-
- close_dump_file (DFI_mach, print_rtl, insns);
- timevar_pop (TV_MACH_DEP);
-
- ggc_collect ();
-#endif
-
- purge_line_number_notes (insns);
- cleanup_barriers ();
-
- /* If a scheduling pass for delayed branches is to be done,
- call the scheduling code. */
-
-#ifdef DELAY_SLOTS
- if (optimize > 0 && flag_delayed_branch)
- {
- timevar_push (TV_DBR_SCHED);
- open_dump_file (DFI_dbr, decl);
-
- dbr_schedule (insns, rtl_dump_file);
-
- close_dump_file (DFI_dbr, print_rtl, insns);
- timevar_pop (TV_DBR_SCHED);
-
- ggc_collect ();
- }
-#endif
-
-#if defined (HAVE_ATTR_length) && !defined (STACK_REGS)
- timevar_push (TV_SHORTEN_BRANCH);
- split_all_insns_noflow ();
- timevar_pop (TV_SHORTEN_BRANCH);
-#endif
-
- convert_to_eh_region_ranges ();
-
- /* Shorten branches. */
- timevar_push (TV_SHORTEN_BRANCH);
- shorten_branches (get_insns ());
- timevar_pop (TV_SHORTEN_BRANCH);
-
- current_function_nothrow = nothrow_function_p ();
- if (current_function_nothrow)
- /* Now we know that this can't throw; set the flag for the benefit
- of other functions later in this translation unit. */
- TREE_NOTHROW (current_function_decl) = 1;
-
- /* Now turn the rtl into assembler code. */
-
- timevar_push (TV_FINAL);
- {
- rtx x;
- const char *fnname;
-
- /* Get the function's name, as described by its RTL. This may be
- different from the DECL_NAME name used in the source file. */
-
- x = DECL_RTL (decl);
- if (GET_CODE (x) != MEM)
- abort ();
- x = XEXP (x, 0);
- if (GET_CODE (x) != SYMBOL_REF)
- abort ();
- fnname = XSTR (x, 0);
-
- assemble_start_function (decl, fnname);
- final_start_function (insns, asm_out_file, optimize);
- final (insns, asm_out_file, optimize, 0);
- final_end_function ();
-
-#ifdef IA64_UNWIND_INFO
- /* ??? The IA-64 ".handlerdata" directive must be issued before
- the ".endp" directive that closes the procedure descriptor. */
- output_function_exception_table ();
-#endif
-
- assemble_end_function (decl, fnname);
-
-#ifndef IA64_UNWIND_INFO
- /* Otherwise, it feels unclean to switch sections in the middle. */
- output_function_exception_table ();
-#endif
-
- if (! quiet_flag)
- fflush (asm_out_file);
-
- /* Release all memory allocated by flow. */
- free_basic_block_vars (0);
-
- /* Release all memory held by regsets now. */
- regset_release_memory ();
- }
- timevar_pop (TV_FINAL);
-
- ggc_collect ();
-
- /* Write DBX symbols if requested. */
-
- /* Note that for those inline functions where we don't initially
- know for certain that we will be generating an out-of-line copy,
- the first invocation of this routine (rest_of_compilation) will
- skip over this code by doing a `goto exit_rest_of_compilation;'.
- Later on, finish_compilation will call rest_of_compilation again
- for those inline functions that need to have out-of-line copies
- generated. During that call, we *will* be routed past here. */
-
- timevar_push (TV_SYMOUT);
- (*debug_hooks->function_decl) (decl);
- timevar_pop (TV_SYMOUT);
-
- exit_rest_of_compilation:
-
- /* In case the function was not output,
- don't leave any temporary anonymous types
- queued up for sdb output. */
-#ifdef SDB_DEBUGGING_INFO
- if (write_symbols == SDB_DEBUG)
- sdbout_types (NULL_TREE);
-#endif
-
- reload_completed = 0;
- flow2_completed = 0;
- no_new_pseudos = 0;
-
- timevar_push (TV_FINAL);
-
- /* Clear out the insn_length contents now that they are no
- 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 ();
-
- free_basic_block_vars (0);
- free_bb_for_insn ();
-
- timevar_pop (TV_FINAL);
-
- /* Make sure volatile mem refs aren't considered valid operands for
- arithmetic insns. We must call this here if this is a nested inline
- function, since the above code leaves us in the init_recog state
- (from final.c), and the function context push/pop code does not
- save/restore volatile_ok.
-
- ??? Maybe it isn't necessary for expand_start_function to call this
- anymore if we do it here? */
-
- init_recog_no_volatile ();
-
- /* We're done with this function. Free up memory if we can. */
- free_after_parsing (cfun);
- if (! DECL_DEFER_OUTPUT (decl))
- {
- free_after_compilation (cfun);
-
- /* Clear integrate.c's pointer to the cfun structure we just
- destroyed. */
- DECL_SAVED_INSNS (decl) = 0;
- }
- cfun = 0;
-
- ggc_collect ();
-
- timevar_pop (TV_REST_OF_COMPILATION);
-}
-\f
-static void
-display_help ()
-{
- int undoc;
- unsigned long i;
- const char *lang;
-
- printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
- printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
- printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
- printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
- printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
- printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
-
- for (i = ARRAY_SIZE (f_options); i--;)
- {
- const char *description = f_options[i].description;
-
- if (description != NULL && * description != 0)
- printf (" -f%-21s %s\n",
- f_options[i].string, _(description));
- }
-
- printf (_(" -O[number] Set optimization level to [number]\n"));
- printf (_(" -Os Optimize for space rather than speed\n"));
- for (i = LAST_PARAM; i--;)
- {
- const char *description = compiler_params[i].help;
- const int length = 21-strlen(compiler_params[i].option);
-
- if (description != NULL && * description != 0)
- printf (" --param %s=<value>%.*s%s\n",
- compiler_params[i].option,
- length > 0 ? length : 1, " ",
- _(description));
- }
- printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
- printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
- printf (_(" -w Suppress warnings\n"));
- printf (_(" -W Enable extra warnings\n"));
-
- for (i = ARRAY_SIZE (W_options); i--;)
- {
- const char *description = W_options[i].description;
-
- 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"));
- printf (_(" -o <file> Place output into <file> \n"));
- printf (_("\
- -G <number> Put global and static data smaller than <number>\n\
- bytes into a special section (on some targets)\n"));
-
- for (i = ARRAY_SIZE (debug_args); i--;)
- {
- if (debug_args[i].description != NULL)
- printf (" -g%-21s %s\n",
- debug_args[i].arg, _(debug_args[i].description));
- }
-
- printf (_(" -aux-info <file> Emit declaration info into <file>\n"));
- printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
- printf (_(" -version Display the compiler's version\n"));
- printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
- printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
-#if defined INSN_SCHEDULING
- printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
-#endif
- printf (_(" --help Display this information\n"));
-
- undoc = 0;
- lang = "language";
-
- /* Display descriptions of language specific options.
- If there is no description, note that there is an undocumented option.
- If the description is empty, do not display anything. (This allows
- options to be deliberately undocumented, for whatever reason).
- If the option string is missing, then this is a marker, indicating
- that the description string is in fact the name of a language, whose
- language specific options are to follow. */
-
- if (ARRAY_SIZE (documented_lang_options) > 1)
- {
- printf (_("\nLanguage specific options:\n"));
-
- for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
- {
- const char *description = documented_lang_options[i].description;
- const char *option = documented_lang_options[i].option;
-
- if (description == NULL)
- {
- undoc = 1;
-
- if (extra_warnings)
- printf (_(" %-23.23s [undocumented]\n"), option);
- }
- else if (*description == 0)
- continue;
- else if (option == NULL)
- {
- if (undoc)
- printf
- (_("\nThere are undocumented %s specific options as well.\n"),
- lang);
- undoc = 0;
-
- printf (_("\n Options for %s:\n"), description);
-
- lang = description;
- }
- else
- printf (" %-23.23s %s\n", option, _(description));
- }
- }
-
- if (undoc)
- printf (_("\nThere are undocumented %s specific options as well.\n"),
- lang);
-
- display_target_options ();
-}
-
-static void
-display_target_options ()
-{
- int undoc, i;
- static bool displayed = false;
-
- /* Avoid double printing for --help --target-help. */
- if (displayed)
- return;
- displayed = true;
-
- if (ARRAY_SIZE (target_switches) > 1
-#ifdef TARGET_OPTIONS
- || ARRAY_SIZE (target_options) > 1
-#endif
- )
- {
- int doc = 0;
-
- undoc = 0;
-
- printf (_("\nTarget specific options:\n"));
-
- for (i = ARRAY_SIZE (target_switches); i--;)
- {
- const char *option = target_switches[i].name;
- const char *description = target_switches[i].description;
-
- if (option == NULL || *option == 0)
- continue;
- else if (description == NULL)
- {
- undoc = 1;
-
- if (extra_warnings)
- printf (_(" -m%-23.23s [undocumented]\n"), option);
- }
- else if (* description != 0)
- doc += printf (" -m%-23.23s %s\n", option, _(description));
- }
-
-#ifdef TARGET_OPTIONS
- for (i = ARRAY_SIZE (target_options); i--;)
- {
- const char *option = target_options[i].prefix;
- const char *description = target_options[i].description;
-
- if (option == NULL || *option == 0)
- continue;
- else if (description == NULL)
- {
- undoc = 1;
-
- if (extra_warnings)
- printf (_(" -m%-23.23s [undocumented]\n"), option);
- }
- else if (* description != 0)
- doc += printf (" -m%-23.23s %s\n", option, _(description));
- }
-#endif
- if (undoc)
- {
- if (doc)
- printf (_("\nThere are undocumented target specific options as well.\n"));
- else
- printf (_(" They exist, but they are not documented.\n"));
- }
- }
-}
-\f
-/* Parse a -d... command line switch. */
-
-static void
-decode_d_option (arg)
- const char *arg;
-{
- int i, c, matched;