nsz Git - libfirm/blob - ir/opt/opt_manage.c

   1 #include "config.h"
   2
   3 #include <assert.h>
   4 #include <stdbool.h>
   5
   6 #include "irgraph_t.h"
   7 #include "irprog_t.h"
   8
   9 #include "iroptimize.h"
  10 #include "irgopt.h"
  11 #include "irdom.h"
  12 #include "iredges.h"
  13 #include "irouts.h"
  14 #include "irverify.h"
  15 #include "irdump.h"
  16 #include "opt_manage.h"
  17
  18 static void deactivate_entity_usage(ir_graph *irg)
  19 {
  20         set_irg_entity_usage_state(irg, ir_entity_usage_not_computed);
  21 }
  22
  23 static void nop(ir_graph *irg) {
  24         (void)irg;
  25 }
  26
  27 void perform_irg_optimization(ir_graph *irg, optdesc_t *opt)
  28 {
  29         ir_graph_state_t new_irg_state;
  30         ir_graph_state_t required = opt->requirements;
  31         const bool dump = get_irp_optimization_dumps();
  32
  33         /* no bad block requires no unreachable code */
  34         if (required & IR_GRAPH_STATE_NO_BAD_BLOCKS)
  35                 required |= IR_GRAPH_STATE_NO_UNREACHABLE_BLOCKS;
  36
  37         /** Some workarounds because information is currently duplicated */
  38         // FIXME should not be necessary!
  39         if (dom_inconsistent == get_irg_dom_state(irg))
  40                 clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_DOMINANCE);
  41         if (loopinfo_inconsistent == get_irg_loopinfo_state(irg))
  42                 clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_LOOPINFO);
  43         if (ir_entity_usage_not_computed == get_irg_entity_usage_state(irg))
  44                 clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_ENTITY_USAGE);
  45
  46         /* assure that all requirements for the optimization are fulfilled */
  47 #define PREPARE(st,func) if (st & (required ^ irg->state)) {func(irg); set_irg_state(irg,st);}
  48         PREPARE(IR_GRAPH_STATE_ONE_RETURN,               normalize_one_return)
  49         PREPARE(IR_GRAPH_STATE_NO_CRITICAL_EDGES,        remove_critical_cf_edges)
  50         PREPARE(IR_GRAPH_STATE_NO_UNREACHABLE_BLOCKS,    remove_unreachable_blocks)
  51         PREPARE(IR_GRAPH_STATE_NO_BAD_BLOCKS,            remove_bads)
  52         PREPARE(IR_GRAPH_STATE_CONSISTENT_DOMINANCE,     assure_doms)
  53         PREPARE(IR_GRAPH_STATE_CONSISTENT_POSTDOMINANCE, assure_postdoms)
  54         PREPARE(IR_GRAPH_STATE_CONSISTENT_OUT_EDGES,     edges_assure)
  55         PREPARE(IR_GRAPH_STATE_CONSISTENT_OUTS,          assure_irg_outs)
  56         PREPARE(IR_GRAPH_STATE_CONSISTENT_LOOPINFO,      assure_cf_loop)
  57         PREPARE(IR_GRAPH_STATE_CONSISTENT_ENTITY_USAGE,  assure_irg_entity_usage_computed)
  58         PREPARE(IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS,    compute_extbb)
  59
  60         /* now all the requirements for the optimization are fulfilled */
  61         if (dump)
  62                 dump_ir_graph(irg, opt->name);
  63
  64         new_irg_state = opt->optimization(irg);
  65
  66         if (dump)
  67                 dump_ir_graph(irg, opt->name);
  68
  69         /* unless the optimization returned that some state is retained,
  70          * we disable the corresponding irg state.
  71          * Since we currently duplicate information, sometimes another func must be called too.
  72          */
  73 #define INVALIDATE(state,func) if (!(state & new_irg_state)) {clear_irg_state(irg,state); func(irg);}
  74         INVALIDATE(IR_GRAPH_STATE_NO_CRITICAL_EDGES,        nop)
  75         INVALIDATE(IR_GRAPH_STATE_NO_UNREACHABLE_BLOCKS,    nop)
  76         INVALIDATE(IR_GRAPH_STATE_NO_BAD_BLOCKS,            nop)
  77         INVALIDATE(IR_GRAPH_STATE_ONE_RETURN,               nop)
  78         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_DOMINANCE,     set_irg_doms_inconsistent)
  79         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_POSTDOMINANCE, set_irg_postdoms_inconsistent)
  80         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_OUTS,          nop)
  81         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_OUT_EDGES,     edges_deactivate)
  82         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_LOOPINFO,      set_irg_loopinfo_inconsistent)
  83         INVALIDATE(IR_GRAPH_STATE_CONSISTENT_ENTITY_USAGE,  deactivate_entity_usage)
  84         INVALIDATE(IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS,    set_irg_extblk_inconsistent)
  85
  86         if (!(new_irg_state & IR_GRAPH_STATE_BROKEN_FOR_VERIFIER)) {
  87                 irg_verify(irg, VERIFY_ENFORCE_SSA);
  88         }
  89
  90 }