Makefile.in (cgraphbuild.o): Add dependency on ipa-utils.h

	* Makefile.in (cgraphbuild.o): Add dependency on ipa-utils.h
	* cgraphbuild.c: Include ipa-utils.h
	(record_reference_ctx): New struct.
	(record_reference): Simplify to work on initializers; not statements.
	(mark_address, mark_load, mark_store): New.
	(build_cgraph_edges): Simplify using walk_stmt_load_store_addr_ops;
	walk PHI nodes too.
	(record_references_in_initializer): Update use of record_reference.
	(rebuild_cgraph_edges): Simplify using walk_stmt_load_store_addr_ops;
	walk PHI nodes too.

From-SVN: r159032

1 files changed, 145 insertions, 65 deletions

diff --git a/gcc/cgraphbuild.c b/gcc/cgraphbuild.c
index bcc66c0..02c373a 100644
--- a/gcc/cgraphbuild.c
+++ b/gcc/cgraphbuild.c
@@ -31,6 +31,13 @@ along with GCC; see the file COPYING3.  If not see
 #include "intl.h"
 #include "gimple.h"
 #include "tree-pass.h"
+#include "ipa-utils.h"
+
+/* Context of record_reference.  */
+struct record_reference_ctx
+{
+  bool only_vars;
+};
 
 /* Walk tree and record all calls and references to functions/variables.
    Called via walk_tree: TP is pointer to tree to be examined.
@@ -42,26 +49,31 @@ record_reference (tree *tp, int *walk_subtrees, void *data)
 {
   tree t = *tp;
   tree decl;
-  bool do_callgraph = data != NULL;
+  struct record_reference_ctx *ctx = (struct record_reference_ctx *)data;
 
   switch (TREE_CODE (t))
     {
     case VAR_DECL:
-      if (TREE_STATIC (t) || DECL_EXTERNAL (t))
-	{
-	  varpool_mark_needed_node (varpool_node (t));
-	  if (lang_hooks.callgraph.analyze_expr)
-	    return lang_hooks.callgraph.analyze_expr (tp, walk_subtrees);
-	}
+    case FUNCTION_DECL:
+      gcc_unreachable ();
       break;
 
     case FDESC_EXPR:
     case ADDR_EXPR:
       /* Record dereferences to the functions.  This makes the
 	 functions reachable unconditionally.  */
-      decl = TREE_OPERAND (*tp, 0);
-      if (TREE_CODE (decl) == FUNCTION_DECL && do_callgraph)
+      decl = get_base_var (*tp);
+      if (TREE_CODE (decl) == FUNCTION_DECL && !ctx->only_vars)
 	cgraph_mark_address_taken_node (cgraph_node (decl));
+
+      if (TREE_CODE (decl) == VAR_DECL)
+	{
+	  gcc_assert (TREE_STATIC (decl) || DECL_EXTERNAL (decl));
+	  if (lang_hooks.callgraph.analyze_expr)
+	    lang_hooks.callgraph.analyze_expr (&decl, walk_subtrees);
+	  varpool_mark_needed_node (varpool_node (decl));
+	}
+      *walk_subtrees = 0;
       break;
 
     default:
@@ -126,6 +138,75 @@ compute_call_stmt_bb_frequency (tree decl, basic_block bb)
   return freq;
 }
 
+/* Mark address taken in STMT.  */
+
+static bool
+mark_address (gimple stmt ATTRIBUTE_UNUSED, tree addr,
+	      void *data ATTRIBUTE_UNUSED)
+{
+  if (TREE_CODE (addr) == FUNCTION_DECL)
+    {
+      struct cgraph_node *node = cgraph_node (addr);
+      cgraph_mark_address_taken_node (node);
+    }
+  else
+    {
+      addr = get_base_address (addr);
+      if (addr && TREE_CODE (addr) == VAR_DECL
+	  && (TREE_STATIC (addr) || DECL_EXTERNAL (addr)))
+	{
+	  struct varpool_node *vnode = varpool_node (addr);
+	  int walk_subtrees;
+
+	  if (lang_hooks.callgraph.analyze_expr)
+	    lang_hooks.callgraph.analyze_expr (&addr, &walk_subtrees);
+	  varpool_mark_needed_node (vnode);
+	}
+    }
+
+  return false;
+}
+
+/* Mark load of T.  */
+
+static bool
+mark_load (gimple stmt ATTRIBUTE_UNUSED, tree t,
+	   void *data ATTRIBUTE_UNUSED)
+{
+  t = get_base_address (t);
+  if (TREE_CODE (t) == VAR_DECL
+      && (TREE_STATIC (t) || DECL_EXTERNAL (t)))
+    {
+      struct varpool_node *vnode = varpool_node (t);
+      int walk_subtrees;
+
+      if (lang_hooks.callgraph.analyze_expr)
+	lang_hooks.callgraph.analyze_expr (&t, &walk_subtrees);
+      varpool_mark_needed_node (vnode);
+    }
+  return false;
+}
+
+/* Mark store of T.  */
+
+static bool
+mark_store (gimple stmt ATTRIBUTE_UNUSED, tree t,
+	    void *data ATTRIBUTE_UNUSED)
+{
+  t = get_base_address (t);
+  if (TREE_CODE (t) == VAR_DECL
+      && (TREE_STATIC (t) || DECL_EXTERNAL (t)))
+    {
+      struct varpool_node *vnode = varpool_node (t);
+      int walk_subtrees;
+
+      if (lang_hooks.callgraph.analyze_expr)
+	lang_hooks.callgraph.analyze_expr (&t, &walk_subtrees);
+      varpool_mark_needed_node (vnode);
+     }
+  return false;
+}
+
 /* Create cgraph edges for function calls.
    Also look for functions and variables having addresses taken.  */
 
@@ -141,49 +222,40 @@ build_cgraph_edges (void)
   /* Create the callgraph edges and record the nodes referenced by the function.
      body.  */
   FOR_EACH_BB (bb)
-    for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-      {
-	gimple stmt = gsi_stmt (gsi);
-	tree decl;
-
-	if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
-	  {
-	    size_t i;
-	    size_t n = gimple_call_num_args (stmt);
+    {
+      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+	{
+	  gimple stmt = gsi_stmt (gsi);
+	  tree decl;
+
+	  if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
 	    cgraph_create_edge (node, cgraph_node (decl), stmt,
-				bb->count, compute_call_stmt_bb_frequency (current_function_decl, bb),
+				bb->count,
+				compute_call_stmt_bb_frequency
+				  (current_function_decl, bb),
 				bb->loop_depth);
-	    for (i = 0; i < n; i++)
-	      walk_tree (gimple_call_arg_ptr (stmt, i), record_reference,
-			 node, visited_nodes);
-	    if (gimple_call_lhs (stmt))
-	      walk_tree (gimple_call_lhs_ptr (stmt), record_reference, node,
-		         visited_nodes);
-	  }
-	else
-	  {
-	    struct walk_stmt_info wi;
-	    memset (&wi, 0, sizeof (wi));
-	    wi.info = node;
-	    wi.pset = visited_nodes;
-	    walk_gimple_op (stmt, record_reference, &wi);
-	    if (gimple_code (stmt) == GIMPLE_OMP_PARALLEL
-		&& gimple_omp_parallel_child_fn (stmt))
-	      {
-		tree fn = gimple_omp_parallel_child_fn (stmt);
+	  walk_stmt_load_store_addr_ops (stmt, node, mark_load,
+					 mark_store, mark_address);
+	  if (gimple_code (stmt) == GIMPLE_OMP_PARALLEL
+	      && gimple_omp_parallel_child_fn (stmt))
+	    {
+	      tree fn = gimple_omp_parallel_child_fn (stmt);
+	      cgraph_mark_needed_node (cgraph_node (fn));
+	    }
+	  if (gimple_code (stmt) == GIMPLE_OMP_TASK)
+	    {
+	      tree fn = gimple_omp_task_child_fn (stmt);
+	      if (fn)
+		cgraph_mark_needed_node (cgraph_node (fn));
+	      fn = gimple_omp_task_copy_fn (stmt);
+	      if (fn)
 		cgraph_mark_needed_node (cgraph_node (fn));
-	      }
-	    if (gimple_code (stmt) == GIMPLE_OMP_TASK)
-	      {
-		tree fn = gimple_omp_task_child_fn (stmt);
-		if (fn)
-		  cgraph_mark_needed_node (cgraph_node (fn));
-		fn = gimple_omp_task_copy_fn (stmt);
-		if (fn)
-		  cgraph_mark_needed_node (cgraph_node (fn));
-	      }
-	  }
-      }
+	    }
+	}
+      for (gsi = gsi_start (phi_nodes (bb)); !gsi_end_p (gsi); gsi_next (&gsi))
+	walk_stmt_load_store_addr_ops (gsi_stmt (gsi), node,
+				       mark_load, mark_store, mark_address);
+   }
 
   /* Look for initializers of constant variables and private statics.  */
   for (step = cfun->local_decls;
@@ -194,8 +266,6 @@ build_cgraph_edges (void)
       if (TREE_CODE (decl) == VAR_DECL
 	  && (TREE_STATIC (decl) && !DECL_EXTERNAL (decl)))
 	varpool_finalize_decl (decl);
-      else if (TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl))
-	walk_tree (&DECL_INITIAL (decl), record_reference, node, visited_nodes);
     }
 
   pointer_set_destroy (visited_nodes);
@@ -229,8 +299,11 @@ void
 record_references_in_initializer (tree decl, bool only_vars)
 {
   struct pointer_set_t *visited_nodes = pointer_set_create ();
+  struct record_reference_ctx ctx = {false};
+
+  ctx.only_vars = only_vars;
   walk_tree (&DECL_INITIAL (decl), record_reference,
-            only_vars ? NULL : decl, visited_nodes);
+             &ctx, visited_nodes);
   pointer_set_destroy (visited_nodes);
 }
 
@@ -249,19 +322,26 @@ rebuild_cgraph_edges (void)
   node->count = ENTRY_BLOCK_PTR->count;
 
   FOR_EACH_BB (bb)
-    for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-      {
-	gimple stmt = gsi_stmt (gsi);
-	tree decl;
-
-	if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
-	  cgraph_create_edge (node, cgraph_node (decl), stmt,
-			      bb->count,
-			      compute_call_stmt_bb_frequency
-			        (current_function_decl, bb),
-			      bb->loop_depth);
-
-      }
+    {
+      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+	{
+	  gimple stmt = gsi_stmt (gsi);
+	  tree decl;
+
+	  if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
+	    cgraph_create_edge (node, cgraph_node (decl), stmt,
+				bb->count,
+				compute_call_stmt_bb_frequency
+				  (current_function_decl, bb),
+				bb->loop_depth);
+	  walk_stmt_load_store_addr_ops (stmt, node, mark_load,
+					 mark_store, mark_address);
+
+	}
+      for (gsi = gsi_start (phi_nodes (bb)); !gsi_end_p (gsi); gsi_next (&gsi))
+	walk_stmt_load_store_addr_ops (gsi_stmt (gsi), node,
+				       mark_load, mark_store, mark_address);
+    }
   gcc_assert (!node->global.inlined_to);
 
   return 0;