2005-09-28 Richard Guenther <rguenther@suse.de>

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

diff --git a/gcc/passes.c b/gcc/passes.c
index c5b4212..b03eae3 100644 (file)
--- a/gcc/passes.c
+++ b/gcc/passes.c
@@ -494,6 +494,12 @@ init_optimization_passes (void)
   NEXT_PASS (pass_merge_phi);
   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);
+
   NEXT_PASS (pass_phiopt);
   NEXT_PASS (pass_may_alias);
   NEXT_PASS (pass_tail_recursion);
@@ -508,7 +514,13 @@ init_optimization_passes (void)
   NEXT_PASS (pass_may_alias);
   NEXT_PASS (pass_rename_ssa_copies);
   NEXT_PASS (pass_dominator);
-  NEXT_PASS (pass_copy_prop);
+
+  /* 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);
+
   NEXT_PASS (pass_dce);
   NEXT_PASS (pass_dse);
   NEXT_PASS (pass_may_alias);
@@ -529,7 +541,13 @@ init_optimization_passes (void)
   NEXT_PASS (pass_sink_code);
   NEXT_PASS (pass_tree_loop);
   NEXT_PASS (pass_dominator);
-  NEXT_PASS (pass_copy_prop);
+
+  /* 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);
+
   NEXT_PASS (pass_cd_dce);
 
   /* FIXME: If DCE is not run before checking for uninitialized uses,
@@ -576,6 +594,10 @@ init_optimization_passes (void)
   NEXT_PASS (pass_tree_loop_done);
   *p = NULL;
 
+  p = &pass_vectorize.sub;
+  NEXT_PASS (pass_dce);
+  *p = NULL;
+
   p = &pass_loop2.sub;
   NEXT_PASS (pass_rtl_loop_init);
   NEXT_PASS (pass_rtl_move_loop_invariants);