[PATCH] Fix PR50902

[Richard Guenther]

This fixes PR50902.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.

Richard.

2011-11-02  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/50902
	* tree-vect-stmts.c (vectorizable_load): Properly convert
	an invariant initializer element.

	* gcc.dg/torture/pr50902.c: New testcase.

Index: gcc/tree-vect-stmts.c
===================================================================
*** gcc/tree-vect-stmts.c	(revision 180762)
--- gcc/tree-vect-stmts.c	(working copy)
*************** vectorizable_load (gimple stmt, gimple_s
*** 4726,4736 ****
  	      /* 4. Handle invariant-load.  */
  	      if (inv_p && !bb_vinfo)
  		{
! 		  tree vec_inv;
  		  gimple_stmt_iterator gsi2 = *gsi;
  		  gcc_assert (!strided_load);
  		  gsi_next (&gsi2);
! 		  vec_inv = build_vector_from_val (vectype, scalar_dest);
  		  new_temp = vect_init_vector (stmt, vec_inv,
  					       vectype, &gsi2);
  		  new_stmt = SSA_NAME_DEF_STMT (new_temp);
--- 4726,4745 ----
  	      /* 4. Handle invariant-load.  */
  	      if (inv_p && !bb_vinfo)
  		{
! 		  tree tem, vec_inv;
  		  gimple_stmt_iterator gsi2 = *gsi;
  		  gcc_assert (!strided_load);
  		  gsi_next (&gsi2);
! 		  tem = scalar_dest;
! 		  if (!useless_type_conversion_p (TREE_TYPE (vectype),
! 						  TREE_TYPE (tem)))
! 		    {
! 		      tem = fold_convert (TREE_TYPE (vectype), tem);
! 		      tem = force_gimple_operand_gsi (&gsi2, tem, true,
! 						      NULL_TREE, true,
! 						      GSI_SAME_STMT);
! 		    }
! 		  vec_inv = build_vector_from_val (vectype, tem);
  		  new_temp = vect_init_vector (stmt, vec_inv,
  					       vectype, &gsi2);
  		  new_stmt = SSA_NAME_DEF_STMT (new_temp);
Index: gcc/testsuite/gcc.dg/torture/pr50902.c
===================================================================
*** gcc/testsuite/gcc.dg/torture/pr50902.c	(revision 0)
--- gcc/testsuite/gcc.dg/torture/pr50902.c	(revision 0)
***************
*** 0 ****
--- 1,9 ----
+ /* { dg-do compile } */
+ 
+ _Bool data[128];
+ void foo (_Bool *init)
+ {
+   int i;
+   for (i = 0; i < 128; i++)
+     data[i] = *init;
+ }