This fixes PR50902. Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.
Richard. 2011-11-02 Richard Guenther <rguent...@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; + }