diff options
Diffstat (limited to 'gcc/toplev.c')
| -rw-r--r-- | gcc/toplev.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c index 369ba5c04f4..8330c89bc44 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -158,6 +158,7 @@ static void rest_of_handle_reorder_blocks (tree, rtx); #ifdef STACK_REGS static void rest_of_handle_stack_regs (tree, rtx); #endif +static void rest_of_handle_variable_tracking (tree, rtx); static void rest_of_handle_machine_reorg (tree, rtx); #ifdef DELAY_SLOTS static void rest_of_handle_delay_slots (tree, rtx); @@ -289,6 +290,7 @@ enum dump_file_index DFI_branch_target_load, DFI_sched2, DFI_stack, + DFI_vartrack, DFI_mach, DFI_dbr, DFI_MAX @@ -340,6 +342,7 @@ static struct dump_file_info dump_file[DFI_MAX] = { "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 }, }; @@ -965,6 +968,13 @@ int flag_tracer = 0; int flag_unit_at_a_time = 0; +/* Nonzero if we should track variables. When + flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according + to optimize, debug_info_level and debug_hooks in process_options (). */ + +#define AUTODETECT_FLAG_VAR_TRACKING 2 +int flag_var_tracking = AUTODETECT_FLAG_VAR_TRACKING; + /* Values of the -falign-* flags: how much to align labels in code. 0 means `use default', 1 means `don't align'. For each variable, there is an _log variant which is the power @@ -1145,7 +1155,8 @@ static const lang_independent_options f_options[] = {"mem-report", &mem_report, 1 }, { "trapv", &flag_trapv, 1 }, { "wrapv", &flag_wrapv, 1 }, - { "new-ra", &flag_new_regalloc, 1 } + { "new-ra", &flag_new_regalloc, 1 }, + { "var-tracking", &flag_var_tracking, 1} }; /* Here is a table, controlled by the tm.h file, listing each -m switch @@ -2148,6 +2159,18 @@ rest_of_handle_stack_regs (tree decl, rtx insns) } #endif +/* Track the variables, ie. compute where the variable is stored at each position in function. */ +static void +rest_of_handle_variable_tracking (tree decl, rtx insns) +{ + timevar_push (TV_VAR_TRACKING); + open_dump_file (DFI_vartrack, decl); + + variable_tracking_main (); + + close_dump_file (DFI_vartrack, print_rtl_with_bb, insns); + timevar_pop (TV_VAR_TRACKING); +} /* Machine independent reorg pass. */ static void @@ -3562,6 +3585,9 @@ rest_of_compilation (tree decl) compute_alignments (); + if (flag_var_tracking) + rest_of_handle_variable_tracking (decl, insns); + /* CFG is no longer maintained up-to-date. */ free_bb_for_insn (); @@ -4414,6 +4440,16 @@ process_options (void) error ("target system does not support the \"%s\" debug format", debug_type_names[write_symbols]); + /* Now we know which debug output will be used so we can set + flag_var_tracking if user has not specified it. */ + if (flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING) + { + /* User has not specified -f(no-)var-tracking so autodetect it. */ + flag_var_tracking + = (optimize >= 1 && debug_info_level >= DINFO_LEVEL_NORMAL + && debug_hooks->var_location != do_nothing_debug_hooks.var_location); + } + /* If auxiliary info generation is desired, open the output file. This goes in the same directory as the source file--unlike all the other output files. */ |
