diff gcc/tree-complex.c @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
line wrap: on
line diff
--- a/gcc/tree-complex.c	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/tree-complex.c	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,5 @@
 /* Lower complex number operations to scalar operations.
-   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
-   Free Software Foundation, Inc.
+   Copyright (C) 2004-2017 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -21,14 +20,26 @@
 #include "config.h"
 #include "system.h"
 #include "coretypes.h"
-#include "tm.h"
+#include "backend.h"
+#include "rtl.h"
 #include "tree.h"
-#include "flags.h"
-#include "tree-flow.h"
 #include "gimple.h"
-#include "tree-iterator.h"
+#include "cfghooks.h"
 #include "tree-pass.h"
+#include "ssa.h"
+#include "fold-const.h"
+#include "stor-layout.h"
+#include "tree-eh.h"
+#include "gimplify.h"
+#include "gimple-iterator.h"
+#include "gimplify-me.h"
+#include "tree-cfg.h"
+#include "tree-dfa.h"
+#include "tree-ssa.h"
 #include "tree-ssa-propagate.h"
+#include "tree-hasher.h"
+#include "cfgloop.h"
+#include "cfganal.h"
 
 
 /* For each complex ssa name, a lattice value.  We're interested in finding
@@ -49,27 +60,29 @@
 
 #define PAIR(a, b)  ((a) << 2 | (b))
 
-DEF_VEC_I(complex_lattice_t);
-DEF_VEC_ALLOC_I(complex_lattice_t, heap);
 
-static VEC(complex_lattice_t, heap) *complex_lattice_values;
+static vec<complex_lattice_t> complex_lattice_values;
 
 /* For each complex variable, a pair of variables for the components exists in
    the hashtable.  */
-static htab_t complex_variable_components;
+static int_tree_htab_type *complex_variable_components;
 
 /* For each complex SSA_NAME, a pair of ssa names for the components.  */
-static VEC(tree, heap) *complex_ssa_name_components;
+static vec<tree> complex_ssa_name_components;
+
+/* Vector of PHI triplets (original complex PHI and corresponding real and
+   imag PHIs if real and/or imag PHIs contain temporarily
+   non-SSA_NAME/non-invariant args that need to be replaced by SSA_NAMEs.  */
+static vec<gphi *> phis_to_revisit;
 
 /* Lookup UID in the complex_variable_components hashtable and return the
    associated tree.  */
 static tree
 cvc_lookup (unsigned int uid)
 {
-  struct int_tree_map *h, in;
+  struct int_tree_map in;
   in.uid = uid;
-  h = (struct int_tree_map *) htab_find_with_hash (complex_variable_components, &in, uid);
-  return h ? h->to : NULL;
+  return complex_variable_components->find_with_hash (in, uid).to;
 }
 
 /* Insert the pair UID, TO into the complex_variable_components hashtable.  */
@@ -77,15 +90,13 @@
 static void
 cvc_insert (unsigned int uid, tree to)
 {
-  struct int_tree_map *h;
-  void **loc;
+  int_tree_map h;
+  int_tree_map *loc;
 
-  h = XNEW (struct int_tree_map);
-  h->uid = uid;
-  h->to = to;
-  loc = htab_find_slot_with_hash (complex_variable_components, h,
-				  uid, INSERT);
-  *(struct int_tree_map **) loc = h;
+  h.uid = uid;
+  loc = complex_variable_components->find_slot_with_hash (h, uid, INSERT);
+  loc->uid = uid;
+  loc->to = to;
 }
 
 /* Return true if T is not a zero constant.  In the case of real values,
@@ -100,7 +111,7 @@
      cannot be treated the same as operations with a real or imaginary
      operand if we care about the signs of zeros in the result.  */
   if (TREE_CODE (t) == REAL_CST && !flag_signed_zeros)
-    zerop = REAL_VALUES_IDENTICAL (TREE_REAL_CST (t), dconst0);
+    zerop = real_identical (&TREE_REAL_CST (t), &dconst0);
   else if (TREE_CODE (t) == FIXED_CST)
     zerop = fixed_zerop (t);
   else if (TREE_CODE (t) == INTEGER_CST)
@@ -143,8 +154,7 @@
   switch (TREE_CODE (t))
     {
     case SSA_NAME:
-      return VEC_index (complex_lattice_t, complex_lattice_values,
-			SSA_NAME_VERSION (t));
+      return complex_lattice_values[SSA_NAME_VERSION (t)];
 
     case COMPLEX_CST:
       real = TREE_REALPART (t);
@@ -176,10 +186,8 @@
 
   for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = DECL_CHAIN (parm))
     if (is_complex_reg (parm)
-	&& var_ann (parm) != NULL
-	&& (ssa_name = gimple_default_def (cfun, parm)) != NULL_TREE)
-      VEC_replace (complex_lattice_t, complex_lattice_values,
-		   SSA_NAME_VERSION (ssa_name), VARYING);
+	&& (ssa_name = ssa_default_def (cfun, parm)) != NULL_TREE)
+      complex_lattice_values[SSA_NAME_VERSION (ssa_name)] = VARYING;
 }
 
 /* Initialize simulation state for each statement.  Return false if we
@@ -190,22 +198,22 @@
 init_dont_simulate_again (void)
 {
   basic_block bb;
-  gimple_stmt_iterator gsi;
-  gimple phi;
   bool saw_a_complex_op = false;
 
-  FOR_EACH_BB (bb)
+  FOR_EACH_BB_FN (bb, cfun)
     {
-      for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+      for (gphi_iterator gsi = gsi_start_phis (bb); !gsi_end_p (gsi);
+	   gsi_next (&gsi))
 	{
-	  phi = gsi_stmt (gsi);
+	  gphi *phi = gsi.phi ();
 	  prop_set_simulate_again (phi,
 				   is_complex_reg (gimple_phi_result (phi)));
 	}
 
-      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+      for (gimple_stmt_iterator gsi = gsi_start_bb (bb); !gsi_end_p (gsi);
+	   gsi_next (&gsi))
 	{
-	  gimple stmt;
+	  gimple *stmt;
 	  tree op0, op1;
 	  bool sim_again_p;
 
@@ -293,7 +301,7 @@
 /* Evaluate statement STMT against the complex lattice defined above.  */
 
 static enum ssa_prop_result
-complex_visit_stmt (gimple stmt, edge *taken_edge_p ATTRIBUTE_UNUSED,
+complex_visit_stmt (gimple *stmt, edge *taken_edge_p ATTRIBUTE_UNUSED,
 		    tree *result_p)
 {
   complex_lattice_t new_l, old_l, op1_l, op2_l;
@@ -312,7 +320,7 @@
 
   *result_p = lhs;
   ver = SSA_NAME_VERSION (lhs);
-  old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver);
+  old_l = complex_lattice_values[ver];
 
   switch (gimple_expr_code (stmt))
     {
@@ -381,14 +389,14 @@
   if (new_l == old_l)
     return SSA_PROP_NOT_INTERESTING;
 
-  VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l);
+  complex_lattice_values[ver] = new_l;
   return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING;
 }
 
 /* Evaluate a PHI node against the complex lattice defined above.  */
 
 static enum ssa_prop_result
-complex_visit_phi (gimple phi)
+complex_visit_phi (gphi *phi)
 {
   complex_lattice_t new_l, old_l;
   unsigned int ver;
@@ -407,12 +415,12 @@
     new_l |= find_lattice_value (gimple_phi_arg_def (phi, i));
 
   ver = SSA_NAME_VERSION (lhs);
-  old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver);
+  old_l = complex_lattice_values[ver];
 
   if (new_l == old_l)
     return SSA_PROP_NOT_INTERESTING;
 
-  VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l);
+  complex_lattice_values[ver] = new_l;
   return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING;
 }
 
@@ -423,7 +431,6 @@
 			  const char *suffix, enum tree_code code)
 {
   tree r = create_tmp_var (type, prefix);
-  add_referenced_var (r);
 
   DECL_SOURCE_LOCATION (r) = DECL_SOURCE_LOCATION (orig);
   DECL_ARTIFICIAL (r) = 1;
@@ -431,11 +438,11 @@
   if (DECL_NAME (orig) && !DECL_IGNORED_P (orig))
     {
       const char *name = IDENTIFIER_POINTER (DECL_NAME (orig));
-
-      DECL_NAME (r) = get_identifier (ACONCAT ((name, suffix, NULL)));
+      name = ACONCAT ((name, suffix, NULL));
+      DECL_NAME (r) = get_identifier (name);
 
       SET_DECL_DEBUG_EXPR (r, build1 (code, type, orig));
-      DECL_DEBUG_EXPR_IS_FROM (r) = 1;
+      DECL_HAS_DEBUG_EXPR_P (r) = 1;
       DECL_IGNORED_P (r) = 0;
       TREE_NO_WARNING (r) = TREE_NO_WARNING (orig);
     }
@@ -487,24 +494,27 @@
     }
 
   ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p;
-  ret = VEC_index (tree, complex_ssa_name_components, ssa_name_index);
+  ret = complex_ssa_name_components[ssa_name_index];
   if (ret == NULL)
     {
-      ret = get_component_var (SSA_NAME_VAR (ssa_name), imag_p);
-      ret = make_ssa_name (ret, NULL);
+      if (SSA_NAME_VAR (ssa_name))
+	ret = get_component_var (SSA_NAME_VAR (ssa_name), imag_p);
+      else
+	ret = TREE_TYPE (TREE_TYPE (ssa_name));
+      ret = make_ssa_name (ret);
 
       /* Copy some properties from the original.  In particular, whether it
 	 is used in an abnormal phi, and whether it's uninitialized.  */
       SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ret)
 	= SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name);
-      if (TREE_CODE (SSA_NAME_VAR (ssa_name)) == VAR_DECL
-	  && gimple_nop_p (SSA_NAME_DEF_STMT (ssa_name)))
+      if (SSA_NAME_IS_DEFAULT_DEF (ssa_name)
+	  && TREE_CODE (SSA_NAME_VAR (ssa_name)) == VAR_DECL)
 	{
 	  SSA_NAME_DEF_STMT (ret) = SSA_NAME_DEF_STMT (ssa_name);
-	  set_default_def (SSA_NAME_VAR (ret), ret);
+	  set_ssa_default_def (cfun, SSA_NAME_VAR (ret), ret);
 	}
 
-      VEC_replace (tree, complex_ssa_name_components, ssa_name_index, ret);
+      complex_ssa_name_components[ssa_name_index] = ret;
     }
 
   return ret;
@@ -519,7 +529,7 @@
   complex_lattice_t lattice = find_lattice_value (ssa_name);
   size_t ssa_name_index;
   tree comp;
-  gimple last;
+  gimple *last;
   gimple_seq list;
 
   /* We know the value must be zero, else there's a bug in our lattice
@@ -533,7 +543,7 @@
      This is fine.  Now we should create an initialization for the value
      we created earlier.  */
   ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p;
-  comp = VEC_index (tree, complex_ssa_name_components, ssa_name_index);
+  comp = complex_ssa_name_components[ssa_name_index];
   if (comp)
     ;
 
@@ -543,7 +553,7 @@
   else if (is_gimple_min_invariant (value)
 	   && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name))
     {
-      VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value);
+      complex_ssa_name_components[ssa_name_index] = value;
       return NULL;
     }
   else if (TREE_CODE (value) == SSA_NAME
@@ -551,14 +561,15 @@
     {
       /* Replace an anonymous base value with the variable from cvc_lookup.
 	 This should result in better debug info.  */
-      if (DECL_IGNORED_P (SSA_NAME_VAR (value))
+      if (SSA_NAME_VAR (ssa_name)
+	  && (!SSA_NAME_VAR (value) || DECL_IGNORED_P (SSA_NAME_VAR (value)))
 	  && !DECL_IGNORED_P (SSA_NAME_VAR (ssa_name)))
 	{
 	  comp = get_component_var (SSA_NAME_VAR (ssa_name), imag_p);
 	  replace_ssa_name_symbol (value, comp);
 	}
 
-      VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value);
+      complex_ssa_name_components[ssa_name_index] = value;
       return NULL;
     }
 
@@ -583,7 +594,7 @@
 
 static tree
 extract_component (gimple_stmt_iterator *gsi, tree t, bool imagpart_p,
-		   bool gimple_p)
+		   bool gimple_p, bool phiarg_p = false)
 {
   switch (TREE_CODE (t))
     {
@@ -593,6 +604,21 @@
     case COMPLEX_EXPR:
       gcc_unreachable ();
 
+    case BIT_FIELD_REF:
+      {
+	tree inner_type = TREE_TYPE (TREE_TYPE (t));
+	t = unshare_expr (t);
+	TREE_TYPE (t) = inner_type;
+	TREE_OPERAND (t, 1) = TYPE_SIZE (inner_type);
+	if (imagpart_p)
+	  TREE_OPERAND (t, 2) = size_binop (PLUS_EXPR, TREE_OPERAND (t, 2),
+					    TYPE_SIZE (inner_type));
+	if (gimple_p)
+	  t = force_gimple_operand_gsi (gsi, t, true, NULL, true,
+					GSI_SAME_STMT);
+	return t;
+      }
+
     case VAR_DECL:
     case RESULT_DECL:
     case PARM_DECL:
@@ -614,7 +640,10 @@
       }
 
     case SSA_NAME:
-      return get_component_ssa_name (t, imagpart_p);
+      t = get_component_ssa_name (t, imagpart_p);
+      if (TREE_CODE (t) == SSA_NAME && SSA_NAME_DEF_STMT (t) == NULL)
+	gcc_assert (phiarg_p);
+      return t;
 
     default:
       gcc_unreachable ();
@@ -624,7 +653,7 @@
 /* Update the complex components of the ssa name on the lhs of STMT.  */
 
 static void
-update_complex_components (gimple_stmt_iterator *gsi, gimple stmt, tree r,
+update_complex_components (gimple_stmt_iterator *gsi, gimple *stmt, tree r,
 			   tree i)
 {
   tree lhs;
@@ -661,17 +690,16 @@
 static void
 update_complex_assignment (gimple_stmt_iterator *gsi, tree r, tree i)
 {
-  gimple_stmt_iterator orig_si = *gsi;
-  gimple stmt;
+  gimple *stmt;
+
+  gimple_assign_set_rhs_with_ops (gsi, COMPLEX_EXPR, r, i);
+  stmt = gsi_stmt (*gsi);
+  update_stmt (stmt);
+  if (maybe_clean_eh_stmt (stmt))
+    gimple_purge_dead_eh_edges (gimple_bb (stmt));
 
   if (gimple_in_ssa_p (cfun))
     update_complex_components (gsi, gsi_stmt (*gsi), r, i);
-
-  gimple_assign_set_rhs_with_ops (&orig_si, COMPLEX_EXPR, r, i);
-  stmt = gsi_stmt (orig_si);
-  update_stmt (stmt);
-  if (maybe_clean_eh_stmt (stmt))
-    gimple_purge_dead_eh_edges (gimple_bb (stmt));
 }
 
 
@@ -681,7 +709,7 @@
 static void
 update_parameter_components (void)
 {
-  edge entry_edge = single_succ_edge (ENTRY_BLOCK_PTR);
+  edge entry_edge = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
   tree parm;
 
   for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = DECL_CHAIN (parm))
@@ -693,7 +721,7 @@
 	continue;
 
       type = TREE_TYPE (type);
-      ssa_name = gimple_default_def (cfun, parm);
+      ssa_name = ssa_default_def (cfun, parm);
       if (!ssa_name)
 	continue;
 
@@ -709,45 +737,56 @@
 static void
 update_phi_components (basic_block bb)
 {
-  gimple_stmt_iterator gsi;
+  gphi_iterator gsi;
 
   for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
     {
-      gimple phi = gsi_stmt (gsi);
+      gphi *phi = gsi.phi ();
 
       if (is_complex_reg (gimple_phi_result (phi)))
 	{
-	  tree lr, li;
-	  gimple pr = NULL, pi = NULL;
-	  unsigned int i, n;
+	  gphi *p[2] = { NULL, NULL };
+	  unsigned int i, j, n;
+	  bool revisit_phi = false;
 
-	  lr = get_component_ssa_name (gimple_phi_result (phi), false);
-	  if (TREE_CODE (lr) == SSA_NAME)
+	  for (j = 0; j < 2; j++)
 	    {
-	      pr = create_phi_node (lr, bb);
-	      SSA_NAME_DEF_STMT (lr) = pr;
-	    }
-
-	  li = get_component_ssa_name (gimple_phi_result (phi), true);
-	  if (TREE_CODE (li) == SSA_NAME)
-	    {
-	      pi = create_phi_node (li, bb);
-	      SSA_NAME_DEF_STMT (li) = pi;
+	      tree l = get_component_ssa_name (gimple_phi_result (phi), j > 0);
+	      if (TREE_CODE (l) == SSA_NAME)
+		p[j] = create_phi_node (l, bb);
 	    }
 
 	  for (i = 0, n = gimple_phi_num_args (phi); i < n; ++i)
 	    {
 	      tree comp, arg = gimple_phi_arg_def (phi, i);
-	      if (pr)
-		{
-		  comp = extract_component (NULL, arg, false, false);
-		  SET_PHI_ARG_DEF (pr, i, comp);
-		}
-	      if (pi)
-		{
-		  comp = extract_component (NULL, arg, true, false);
-		  SET_PHI_ARG_DEF (pi, i, comp);
-		}
+	      for (j = 0; j < 2; j++)
+		if (p[j])
+		  {
+		    comp = extract_component (NULL, arg, j > 0, false, true);
+		    if (TREE_CODE (comp) == SSA_NAME
+			&& SSA_NAME_DEF_STMT (comp) == NULL)
+		      {
+			/* For the benefit of any gimple simplification during
+			   this pass that might walk SSA_NAME def stmts,
+			   don't add SSA_NAMEs without definitions into the
+			   PHI arguments, but put a decl in there instead
+			   temporarily, and revisit this PHI later on.  */
+			if (SSA_NAME_VAR (comp))
+			  comp = SSA_NAME_VAR (comp);
+			else
+			  comp = create_tmp_reg (TREE_TYPE (comp),
+						 get_name (comp));
+			revisit_phi = true;
+		      }
+		    SET_PHI_ARG_DEF (p[j], i, comp);
+		  }
+	    }
+
+	  if (revisit_phi)
+	    {
+	      phis_to_revisit.safe_push (phi);
+	      phis_to_revisit.safe_push (p[0]);
+	      phis_to_revisit.safe_push (p[1]);
 	    }
 	}
     }
@@ -760,7 +799,7 @@
 {
   tree inner_type = TREE_TYPE (type);
   tree r, i, lhs, rhs;
-  gimple stmt = gsi_stmt (*gsi);
+  gimple *stmt = gsi_stmt (*gsi);
 
   if (is_gimple_assign (stmt))
     {
@@ -821,13 +860,16 @@
   else if (rhs && TREE_CODE (rhs) == SSA_NAME && !TREE_SIDE_EFFECTS (lhs))
     {
       tree x;
-      gimple t;
+      gimple *t;
+      location_t loc;
 
+      loc = gimple_location (stmt);
       r = extract_component (gsi, rhs, 0, false);
       i = extract_component (gsi, rhs, 1, false);
 
       x = build1 (REALPART_EXPR, inner_type, unshare_expr (lhs));
       t = gimple_build_assign (x, r);
+      gimple_set_location (t, loc);
       gsi_insert_before (gsi, t, GSI_SAME_STMT);
 
       if (stmt == gsi_stmt (*gsi))
@@ -840,11 +882,12 @@
 	{
 	  x = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs));
 	  t = gimple_build_assign (x, i);
+	  gimple_set_location (t, loc);
 	  gsi_insert_before (gsi, t, GSI_SAME_STMT);
 
 	  stmt = gsi_stmt (*gsi);
 	  gcc_assert (gimple_code (stmt) == GIMPLE_RETURN);
-	  gimple_return_set_retval (stmt, lhs);
+	  gimple_return_set_retval (as_a <greturn *> (stmt), lhs);
 	}
 
       update_stmt (stmt);
@@ -936,10 +979,11 @@
 expand_complex_libcall (gimple_stmt_iterator *gsi, tree ar, tree ai,
 			tree br, tree bi, enum tree_code code)
 {
-  enum machine_mode mode;
+  machine_mode mode;
   enum built_in_function bcode;
   tree fn, type, lhs;
-  gimple old_stmt, stmt;
+  gimple *old_stmt;
+  gcall *stmt;
 
   old_stmt = gsi_stmt (*gsi);
   lhs = gimple_assign_lhs (old_stmt);
@@ -956,7 +1000,7 @@
 	     (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT));
   else
     gcc_unreachable ();
-  fn = built_in_decls[bcode];
+  fn = builtin_decl_explicit (bcode);
 
   stmt = gimple_build_call (fn, 4, ar, ai, br, bi);
   gimple_call_set_lhs (stmt, lhs);
@@ -1005,7 +1049,7 @@
     case PAIR (ONLY_IMAG, ONLY_REAL):
       rr = ar;
       if (TREE_CODE (ai) == REAL_CST
-	  && REAL_VALUES_IDENTICAL (TREE_REAL_CST (ai), dconst1))
+	  && real_identical (&TREE_REAL_CST (ai), &dconst1))
 	ri = br;
       else
 	ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br);
@@ -1104,7 +1148,7 @@
 {
   tree rr, ri, ratio, div, t1, t2, tr, ti, compare;
   basic_block bb_cond, bb_true, bb_false, bb_join;
-  gimple stmt;
+  gimple *stmt;
 
   /* Examine |br| < |bi|, and branch.  */
   t1 = gimplify_build1 (gsi, ABS_EXPR, inner_type, br);
@@ -1118,14 +1162,14 @@
   if (TREE_CODE (compare) != INTEGER_CST)
     {
       edge e;
-      gimple stmt;
+      gimple *stmt;
       tree cond, tmp;
 
-      tmp = create_tmp_var (boolean_type_node, NULL);
+      tmp = create_tmp_var (boolean_type_node);
       stmt = gimple_build_assign (tmp, compare);
       if (gimple_in_ssa_p (cfun))
 	{
-	  tmp = make_ssa_name (tmp,  stmt);
+	  tmp = make_ssa_name (tmp, stmt);
 	  gimple_assign_set_lhs (stmt, tmp);
 	}
 
@@ -1142,13 +1186,22 @@
       bb_join = e->dest;
       bb_true = create_empty_bb (bb_cond);
       bb_false = create_empty_bb (bb_true);
+      bb_true->frequency = bb_false->frequency = bb_cond->frequency / 2;
+      bb_true->count = bb_false->count
+	 = bb_cond->count.apply_probability (profile_probability::even ());
 
       /* Wire the blocks together.  */
       e->flags = EDGE_TRUE_VALUE;
+      /* TODO: With value profile we could add an historgram to determine real
+	 branch outcome.  */
+      e->probability = profile_probability::even ();
       redirect_edge_succ (e, bb_true);
-      make_edge (bb_cond, bb_false, EDGE_FALSE_VALUE);
-      make_edge (bb_true, bb_join, EDGE_FALLTHRU);
-      make_edge (bb_false, bb_join, EDGE_FALLTHRU);
+      edge e2 = make_edge (bb_cond, bb_false, EDGE_FALSE_VALUE);
+      e2->probability = profile_probability::even ();
+      make_single_succ_edge (bb_true, bb_join, EDGE_FALLTHRU);
+      make_single_succ_edge (bb_false, bb_join, EDGE_FALLTHRU);
+      add_bb_to_loop (bb_true, bb_cond->loop_father);
+      add_bb_to_loop (bb_false, bb_cond->loop_father);
 
       /* Update dominance info.  Note that bb_join's data was
          updated by split_block.  */
@@ -1158,8 +1211,8 @@
           set_immediate_dominator (CDI_DOMINATORS, bb_false, bb_cond);
         }
 
-      rr = make_rename_temp (inner_type, NULL);
-      ri = make_rename_temp (inner_type, NULL);
+      rr = create_tmp_reg (inner_type);
+      ri = create_tmp_reg (inner_type);
     }
 
   /* In the TRUE branch, we compute
@@ -1290,6 +1343,7 @@
       rr = gimplify_build2 (gsi, code, inner_type, ai, bi);
       ri = gimplify_build2 (gsi, code, inner_type, ar, bi);
       ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ri);
+      break;
 
     case PAIR (ONLY_REAL, VARYING):
     case PAIR (ONLY_IMAG, VARYING):
@@ -1364,7 +1418,7 @@
 			   tree br, tree bi, enum tree_code code)
 {
   tree cr, ci, cc, type;
-  gimple stmt;
+  gimple *stmt;
 
   cr = gimplify_build2 (gsi, code, boolean_type_node, ar, br);
   ci = gimplify_build2 (gsi, code, boolean_type_node, ai, bi);
@@ -1377,8 +1431,11 @@
   switch (gimple_code (stmt))
     {
     case GIMPLE_RETURN:
-      type = TREE_TYPE (gimple_return_retval (stmt));
-      gimple_return_set_retval (stmt, fold_convert (type, cc));
+      {
+	greturn *return_stmt = as_a <greturn *> (stmt);
+	type = TREE_TYPE (gimple_return_retval (return_stmt));
+	gimple_return_set_retval (return_stmt, fold_convert (type, cc));
+      }
       break;
 
     case GIMPLE_ASSIGN:
@@ -1388,9 +1445,12 @@
       break;
 
     case GIMPLE_COND:
-      gimple_cond_set_code (stmt, EQ_EXPR);
-      gimple_cond_set_lhs (stmt, cc);
-      gimple_cond_set_rhs (stmt, boolean_true_node);
+      {
+	gcond *cond_stmt = as_a <gcond *> (stmt);
+	gimple_cond_set_code (cond_stmt, EQ_EXPR);
+	gimple_cond_set_lhs (cond_stmt, cc);
+	gimple_cond_set_rhs (cond_stmt, boolean_true_node);
+      }
       break;
 
     default:
@@ -1400,18 +1460,54 @@
   update_stmt (stmt);
 }
 
+/* Expand inline asm that sets some complex SSA_NAMEs.  */
+
+static void
+expand_complex_asm (gimple_stmt_iterator *gsi)
+{
+  gasm *stmt = as_a <gasm *> (gsi_stmt (*gsi));
+  unsigned int i;
+
+  for (i = 0; i < gimple_asm_noutputs (stmt); ++i)
+    {
+      tree link = gimple_asm_output_op (stmt, i);
+      tree op = TREE_VALUE (link);
+      if (TREE_CODE (op) == SSA_NAME
+	  && TREE_CODE (TREE_TYPE (op)) == COMPLEX_TYPE)
+	{
+	  tree type = TREE_TYPE (op);
+	  tree inner_type = TREE_TYPE (type);
+	  tree r = build1 (REALPART_EXPR, inner_type, op);
+	  tree i = build1 (IMAGPART_EXPR, inner_type, op);
+	  gimple_seq list = set_component_ssa_name (op, false, r);
+
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+
+	  list = set_component_ssa_name (op, true, i);
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+	}
+    }
+}
 
 /* Process one statement.  If we identify a complex operation, expand it.  */
 
 static void
 expand_complex_operations_1 (gimple_stmt_iterator *gsi)
 {
-  gimple stmt = gsi_stmt (*gsi);
+  gimple *stmt = gsi_stmt (*gsi);
   tree type, inner_type, lhs;
   tree ac, ar, ai, bc, br, bi;
   complex_lattice_t al, bl;
   enum tree_code code;
 
+  if (gimple_code (stmt) == GIMPLE_ASM)
+    {
+      expand_complex_asm (gsi);
+      return;
+    }
+
   lhs = gimple_get_lhs (stmt);
   if (!lhs && gimple_code (stmt) != GIMPLE_COND)
     return;
@@ -1440,7 +1536,7 @@
     case EQ_EXPR:
     case NE_EXPR:
       /* Note, both GIMPLE_ASSIGN and GIMPLE_COND may have an EQ_EXPR
-	 subocde, so we need to access the operands using gimple_op.  */
+	 subcode, so we need to access the operands using gimple_op.  */
       inner_type = TREE_TYPE (gimple_op (stmt, 1));
       if (TREE_CODE (inner_type) != COMPLEX_TYPE)
 	return;
@@ -1565,98 +1661,145 @@
 static unsigned int
 tree_lower_complex (void)
 {
-  int old_last_basic_block;
   gimple_stmt_iterator gsi;
   basic_block bb;
+  int n_bbs, i;
+  int *rpo;
 
   if (!init_dont_simulate_again ())
     return 0;
 
-  complex_lattice_values = VEC_alloc (complex_lattice_t, heap, num_ssa_names);
-  VEC_safe_grow_cleared (complex_lattice_t, heap,
-			 complex_lattice_values, num_ssa_names);
+  complex_lattice_values.create (num_ssa_names);
+  complex_lattice_values.safe_grow_cleared (num_ssa_names);
 
   init_parameter_lattice_values ();
   ssa_propagate (complex_visit_stmt, complex_visit_phi);
 
-  complex_variable_components = htab_create (10,  int_tree_map_hash,
-					     int_tree_map_eq, free);
+  complex_variable_components = new int_tree_htab_type (10);
 
-  complex_ssa_name_components = VEC_alloc (tree, heap, 2*num_ssa_names);
-  VEC_safe_grow_cleared (tree, heap, complex_ssa_name_components,
-			 2 * num_ssa_names);
+  complex_ssa_name_components.create (2 * num_ssa_names);
+  complex_ssa_name_components.safe_grow_cleared (2 * num_ssa_names);
 
   update_parameter_components ();
 
-  /* ??? Ideally we'd traverse the blocks in breadth-first order.  */
-  old_last_basic_block = last_basic_block;
-  FOR_EACH_BB (bb)
+  rpo = XNEWVEC (int, last_basic_block_for_fn (cfun));
+  n_bbs = pre_and_rev_post_order_compute (NULL, rpo, false);
+  for (i = 0; i < n_bbs; i++)
     {
-      if (bb->index >= old_last_basic_block)
-	continue;
-
+      bb = BASIC_BLOCK_FOR_FN (cfun, rpo[i]);
       update_phi_components (bb);
       for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
 	expand_complex_operations_1 (&gsi);
     }
 
+  free (rpo);
+
+  if (!phis_to_revisit.is_empty ())
+    {
+      unsigned int n = phis_to_revisit.length ();
+      for (unsigned int j = 0; j < n; j += 3)
+	for (unsigned int k = 0; k < 2; k++)
+	  if (gphi *phi = phis_to_revisit[j + k + 1])
+	    {
+	      unsigned int m = gimple_phi_num_args (phi);
+	      for (unsigned int l = 0; l < m; ++l)
+		{
+		  tree op = gimple_phi_arg_def (phi, l);
+		  if (TREE_CODE (op) == SSA_NAME
+		      || is_gimple_min_invariant (op))
+		    continue;
+		  tree arg = gimple_phi_arg_def (phis_to_revisit[j], l);
+		  op = extract_component (NULL, arg, k > 0, false, false);
+		  SET_PHI_ARG_DEF (phi, l, op);
+		}
+	    }
+      phis_to_revisit.release ();
+    }
+
   gsi_commit_edge_inserts ();
 
-  htab_delete (complex_variable_components);
-  VEC_free (tree, heap, complex_ssa_name_components);
-  VEC_free (complex_lattice_t, heap, complex_lattice_values);
+  delete complex_variable_components;
+  complex_variable_components = NULL;
+  complex_ssa_name_components.release ();
+  complex_lattice_values.release ();
   return 0;
 }
 
-struct gimple_opt_pass pass_lower_complex =
+namespace {
+
+const pass_data pass_data_lower_complex =
+{
+  GIMPLE_PASS, /* type */
+  "cplxlower", /* name */
+  OPTGROUP_NONE, /* optinfo_flags */
+  TV_NONE, /* tv_id */
+  PROP_ssa, /* properties_required */
+  PROP_gimple_lcx, /* properties_provided */
+  0, /* properties_destroyed */
+  0, /* todo_flags_start */
+  TODO_update_ssa, /* todo_flags_finish */
+};
+
+class pass_lower_complex : public gimple_opt_pass
 {
- {
-  GIMPLE_PASS,
-  "cplxlower",				/* name */
-  0,					/* gate */
-  tree_lower_complex,			/* execute */
-  NULL,					/* sub */
-  NULL,					/* next */
-  0,					/* static_pass_number */
-  TV_NONE,				/* tv_id */
-  PROP_ssa,				/* properties_required */
-  PROP_gimple_lcx,			/* properties_provided */
-  0,                       		/* properties_destroyed */
-  0,					/* todo_flags_start */
-  TODO_dump_func
-    | TODO_ggc_collect
-    | TODO_update_ssa
-    | TODO_verify_stmts	 		/* todo_flags_finish */
- }
-};
+public:
+  pass_lower_complex (gcc::context *ctxt)
+    : gimple_opt_pass (pass_data_lower_complex, ctxt)
+  {}
+
+  /* opt_pass methods: */
+  opt_pass * clone () { return new pass_lower_complex (m_ctxt); }
+  virtual unsigned int execute (function *) { return tree_lower_complex (); }
+
+}; // class pass_lower_complex
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_lower_complex (gcc::context *ctxt)
+{
+  return new pass_lower_complex (ctxt);
+}
 
 
-static bool
-gate_no_optimization (void)
+namespace {
+
+const pass_data pass_data_lower_complex_O0 =
 {
-  /* With errors, normal optimization passes are not run.  If we don't
-     lower complex operations at all, rtl expansion will abort.  */
-  return !(cfun->curr_properties & PROP_gimple_lcx);
-}
+  GIMPLE_PASS, /* type */
+  "cplxlower0", /* name */
+  OPTGROUP_NONE, /* optinfo_flags */
+  TV_NONE, /* tv_id */
+  PROP_cfg, /* properties_required */
+  PROP_gimple_lcx, /* properties_provided */
+  0, /* properties_destroyed */
+  0, /* todo_flags_start */
+  TODO_update_ssa, /* todo_flags_finish */
+};
 
-struct gimple_opt_pass pass_lower_complex_O0 =
+class pass_lower_complex_O0 : public gimple_opt_pass
 {
- {
-  GIMPLE_PASS,
-  "cplxlower0",				/* name */
-  gate_no_optimization,			/* gate */
-  tree_lower_complex,			/* execute */
-  NULL,					/* sub */
-  NULL,					/* next */
-  0,					/* static_pass_number */
-  TV_NONE,				/* tv_id */
-  PROP_cfg,				/* properties_required */
-  PROP_gimple_lcx,			/* properties_provided */
-  0,					/* properties_destroyed */
-  0,					/* todo_flags_start */
-  TODO_dump_func
-    | TODO_ggc_collect
-    | TODO_update_ssa
-    | TODO_verify_stmts	 		/* todo_flags_finish */
- }
-};
+public:
+  pass_lower_complex_O0 (gcc::context *ctxt)
+    : gimple_opt_pass (pass_data_lower_complex_O0, ctxt)
+  {}
+
+  /* opt_pass methods: */
+  virtual bool gate (function *fun)
+    {
+      /* With errors, normal optimization passes are not run.  If we don't
+	 lower complex operations at all, rtl expansion will abort.  */
+      return !(fun->curr_properties & PROP_gimple_lcx);
+    }
+
+  virtual unsigned int execute (function *) { return tree_lower_complex (); }
+
+}; // class pass_lower_complex_O0
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_lower_complex_O0 (gcc::context *ctxt)
+{
+  return new pass_lower_complex_O0 (ctxt);
+}