2006-09-05 Andrew Pinski <pinskia@physics.uc.edu>

[pf3gnuchains/gcc-fork.git] / gcc / passes.c

diff --git a/gcc/passes.c b/gcc/passes.c
index 85bfefa..46e4756 100644 (file)
--- a/gcc/passes.c
+++ b/gcc/passes.c
@@ -487,6 +487,7 @@ init_optimization_passes (void)
 
   p = &pass_all_optimizations.sub;
   NEXT_PASS (pass_referenced_vars);
+  NEXT_PASS (pass_reset_cc_flags);
   NEXT_PASS (pass_create_structure_vars);
   NEXT_PASS (pass_build_ssa);
   NEXT_PASS (pass_may_alias);
@@ -505,11 +506,12 @@ init_optimization_passes (void)
   NEXT_PASS (pass_dce);
   NEXT_PASS (pass_dominator);
 
-  /* The only copy propagation opportunities left after DOM
-     should be due to degenerate PHI nodes.  So rather than
-     run the full copy propagator, just discover and copy
-     propagate away the degenerate PHI nodes.  */
-  NEXT_PASS (pass_phi_only_copy_prop);
+  /* The only const/copy propagation opportunities left after
+     DOM should be due to degenerate PHI nodes.  So rather than
+     run the full propagators, run a specialized pass which
+     only examines PHIs to discover const/copy propagation
+     opportunities.  */
+  NEXT_PASS (pass_phi_only_cprop);
 
   NEXT_PASS (pass_phiopt);
   NEXT_PASS (pass_may_alias);
@@ -526,11 +528,12 @@ init_optimization_passes (void)
   NEXT_PASS (pass_rename_ssa_copies);
   NEXT_PASS (pass_dominator);
 
-  /* The only copy propagation opportunities left after DOM
-     should be due to degenerate PHI nodes.  So rather than
-     run the full copy propagator, just discover and copy
-     propagate away the degenerate PHI nodes.  */
-  NEXT_PASS (pass_phi_only_copy_prop);
+  /* The only const/copy propagation opportunities left after
+     DOM should be due to degenerate PHI nodes.  So rather than
+     run the full propagators, run a specialized pass which
+     only examines PHIs to discover const/copy propagation
+     opportunities.  */
+  NEXT_PASS (pass_phi_only_cprop);
 
   NEXT_PASS (pass_reassoc);
   NEXT_PASS (pass_dce);
@@ -556,11 +559,12 @@ init_optimization_passes (void)
   NEXT_PASS (pass_vrp);
   NEXT_PASS (pass_dominator);
 
-  /* The only copy propagation opportunities left after DOM
-     should be due to degenerate PHI nodes.  So rather than
-     run the full copy propagator, just discover and copy
-     propagate away the degenerate PHI nodes.  */
-  NEXT_PASS (pass_phi_only_copy_prop);
+  /* The only const/copy propagation opportunities left after
+     DOM should be due to degenerate PHI nodes.  So rather than
+     run the full propagators, run a specialized pass which
+     only examines PHIs to discover const/copy propagation
+     opportunities.  */
+  NEXT_PASS (pass_phi_only_cprop);
 
   NEXT_PASS (pass_cd_dce);
 
@@ -622,7 +626,6 @@ init_optimization_passes (void)
   *p = NULL;
   
   p = &pass_rest_of_compilation.sub;
-  NEXT_PASS (pass_remove_unnecessary_notes);
   NEXT_PASS (pass_init_function);
   NEXT_PASS (pass_jump);
   NEXT_PASS (pass_insn_locators_initialize);
@@ -649,6 +652,7 @@ init_optimization_passes (void)
   NEXT_PASS (pass_regmove);
   NEXT_PASS (pass_split_all_insns);
   NEXT_PASS (pass_mode_switching);
+  NEXT_PASS (pass_see);
   NEXT_PASS (pass_recompute_reg_usage);
   NEXT_PASS (pass_sms);
   NEXT_PASS (pass_sched);
@@ -723,11 +727,17 @@ execute_todo (unsigned int flags)
   /* Always cleanup the CFG before trying to update SSA .  */
   if (flags & TODO_cleanup_cfg)
     {
+      /* CFG Cleanup can cause a constant to prop into an ARRAY_REF.  */
+      updating_used_alone = true;
+
       if (current_loops)
        cleanup_tree_cfg_loop ();
       else
        cleanup_tree_cfg ();
 
+      /* Update the used alone after cleanup cfg.  */
+      recalculate_used_alone ();
+
       /* When cleanup_tree_cfg merges consecutive blocks, it may
         perform some simplistic propagation when removing single
         valued PHI nodes.  This propagation may, in turn, cause the