re PR target/47148 (likely wrong code bug)

PR tree-optimization/47148
	* ipa-split.c (split_function): Convert arguments to
	DECL_ARG_TYPE if possible.

	* gcc.c-torture/execute/pr47148.c: New test.

From-SVN: r168441

gcc/ChangeLog

@@ -1,5 +1,9 @@
 2011-01-03  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/47148
+	* ipa-split.c (split_function): Convert arguments to
+	DECL_ARG_TYPE if possible.
+
 	PR tree-optimization/47155
 	* tree-ssa-ccp.c (bit_value_binop_1): Use r1type instead of type
 	when computing uns.

gcc/ipa-split.c

@@ -1,5 +1,5 @@
 /* Function splitting pass
-   Copyright (C) 2010
+   Copyright (C) 2010, 2011
    Free Software Foundation, Inc.
    Contributed by Jan Hubicka  <jh@suse.cz>
 
@@ -943,6 +943,9 @@ split_function (struct split_point *split_point)
   tree retval = NULL, real_retval = NULL;
   bool split_part_return_p = false;
   gimple last_stmt = NULL;
+  bool conv_needed = false;
+  unsigned int i;
+  tree arg;
 
   if (dump_file)
     {
@@ -959,7 +962,16 @@ split_function (struct split_point *split_point)
 			  SSA_NAME_VERSION (gimple_default_def (cfun, parm))))
       bitmap_set_bit (args_to_skip, num);
     else
-      VEC_safe_push (tree, heap, args_to_pass, gimple_default_def (cfun, parm));
+      {
+	arg = gimple_default_def (cfun, parm);
+	if (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm))
+	    != TYPE_MAIN_VARIANT (TREE_TYPE (arg)))
+	  {
+	    conv_needed = true;
+	    arg = fold_convert (DECL_ARG_TYPE (parm), arg);
+	  }
+	VEC_safe_push (tree, heap, args_to_pass, arg);
+      }
 
   /* See if the split function will return.  */
   FOR_EACH_EDGE (e, ei, return_bb->preds)
@@ -1056,6 +1068,14 @@ split_function (struct split_point *split_point)
 
   /* Produce the call statement.  */
   gsi = gsi_last_bb (call_bb);
+  if (conv_needed)
+    FOR_EACH_VEC_ELT (tree, args_to_pass, i, arg)
+      if (!is_gimple_val (arg))
+	{
+	  arg = force_gimple_operand_gsi (&gsi, arg, true, NULL_TREE,
+					  false, GSI_NEW_STMT);
+	  VEC_replace (tree, args_to_pass, i, arg);
+	}
   call = gimple_build_call_vec (node->decl, args_to_pass);
   gimple_set_block (call, DECL_INITIAL (current_function_decl));
 

gcc/testsuite/ChangeLog

@@ -1,5 +1,8 @@
 2011-01-03  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/47148
+	* gcc.c-torture/execute/pr47148.c: New test.
+
 	PR tree-optimization/47155
 	* gcc.c-torture/execute/pr47155.c: New test.
 

gcc/testsuite/gcc.c-torture/execute/pr47148.c

@@ -0,0 +1,32 @@
+/* PR tree-optimization/47148 */
+
+static inline unsigned
+bar (unsigned x, unsigned y)
+{
+  if (y >= 32)
+    return x;
+  else
+    return x >> y;
+}
+
+static unsigned a = 1, b = 1;
+
+static inline void
+foo (unsigned char x, unsigned y)
+{
+  if (!y)
+    return;
+  unsigned c = (0x7000U / (x - 2)) ^ a;
+  unsigned d = bar (a, a);
+  b &= ((a - d) && (a - 1)) + c;
+}
+
+int
+main (void)
+{
+  foo (1, 1);
+  foo (-1, 1);
+  if (b && ((unsigned char) -1) == 255)
+    __builtin_abort ();
+  return 0;
+}