Remove quite obvious dead assignments.

2019-06-27  Martin Liska  <mliska@suse.cz>

	* asan.c (asan_emit_allocas_unpoison): Remove obviously
	dead assignments.
	* bt-load.c (move_btr_def): Likewise.
	* builtins.c (expand_builtin_apply_args_1): Likewise.
	(expand_builtin_apply): Likewise.
	* cfgexpand.c (expand_asm_stmt): Likewise.
	(construct_init_block): Likewise.
	* cfghooks.c (verify_flow_info): Likewise.
	* cfgloopmanip.c (remove_path): Likewise.
	* cfgrtl.c (rtl_verify_bb_layout): Likewise.
	* cgraph.c (cgraph_node::set_pure_flag): Likewise.
	* combine.c (simplify_if_then_else): Likewise.
	* config/i386/i386.c (ix86_setup_incoming_vararg_bounds): Likewise.
	(choose_basereg): Likewise.
	(ix86_expand_prologue): Likewise.
	(ix86_preferred_output_reload_class): Likewise.
	* cselib.c (cselib_record_sets): Likewise.
	* df-scan.c (df_scan_alloc): Likewise.
	* dojump.c (do_jump_by_parts_greater_rtx): Likewise.
	* early-remat.c (early_remat::record_equiv_candidates): Likewise.
	* emit-rtl.c (try_split): Likewise.
	* graphite-scop-detection.c (assign_parameter_index_in_region): Likewise.
	* ipa-cp.c (cgraph_edge_brings_all_agg_vals_for_node): Likewise.
	* ira-color.c (setup_profitable_hard_regs): Likewise.
	* ira.c (rtx_moveable_p): Likewise.
	* lra-eliminations.c (eliminate_regs_in_insn): Likewise.
	* read-rtl.c (read_subst_mapping): Likewise.
	* regrename.c (scan_rtx): Likewise.
	* reorg.c (fill_slots_from_thread): Likewise.
	* tree-inline.c (tree_function_versioning): Likewise.
	* tree-ssa-reassoc.c (optimize_ops_list): Likewise.
	* tree-ssa-sink.c (statement_sink_location): Likewise.
	* tree-ssa-threadedge.c (thread_across_edge): Likewise.
	* tree-vect-loop.c (vect_get_loop_niters): Likewise.
	(vect_create_epilog_for_reduction): Likewise.
	* tree.c (build_nonstandard_integer_type): Likewise.
2019-06-27  Martin Liska  <mliska@suse.cz>

	* class.c (adjust_clone_args): Remove obviously
	dead assignments.
	(dump_class_hierarchy_r): Likewise.
	* decl.c (check_initializer): Likewise.
	* parser.c (cp_parser_lambda_expression): Likewise.
	* pt.c (unify_bound_ttp_args): Likewise.
	(convert_template_argument): Likewise.
	* rtti.c (build_headof): Likewise.
	* typeck.c (convert_for_initialization): Likewise.
2019-06-27  Martin Liska  <mliska@suse.cz>

	* libgcov-driver-system.c (gcov_exit_open_gcda_file): Remove obviously
	dead assignments.
	* libgcov-util.c: Likewise.

From-SVN: r272744

1 files changed, 2 insertions, 6 deletions

diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index b37bf6f..95c2d82 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -730,9 +730,7 @@ vect_get_loop_niters (struct loop *loop, tree *assumptions,
   if (!exit)
     return cond;
 
-  niter = chrec_dont_know;
   may_be_zero = NULL_TREE;
-  niter_assumptions = boolean_true_node;
   if (!number_of_iterations_exit_assumptions (loop, exit, &niter_desc, NULL)
       || chrec_contains_undetermined (niter_desc.niter))
     return cond;
@@ -5113,7 +5111,6 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs,
 	  if (off != 0)
 	    {
 	      tree new_idx_val = idx_val;
-	      tree new_val = val;
 	      if (off != v_size - el_size)
 		{
 		  new_idx_val = make_ssa_name (idx_eltype);
@@ -5122,7 +5119,7 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs,
 						     old_idx_val);
 		  gsi_insert_before (&exit_gsi, epilog_stmt, GSI_SAME_STMT);
 		}
-	      new_val = make_ssa_name (data_eltype);
+	      tree new_val = make_ssa_name (data_eltype);
 	      epilog_stmt = gimple_build_assign (new_val,
 						 COND_EXPR,
 						 build2 (GT_EXPR,
@@ -5303,14 +5300,13 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs,
 	 in a vector mode of smaller size and first reduce upper/lower
 	 halves against each other.  */
       enum machine_mode mode1 = mode;
-      tree vectype1 = vectype;
       unsigned sz = tree_to_uhwi (TYPE_SIZE_UNIT (vectype));
       unsigned sz1 = sz;
       if (!slp_reduc
 	  && (mode1 = targetm.vectorize.split_reduction (mode)) != mode)
 	sz1 = GET_MODE_SIZE (mode1).to_constant ();
 
-      vectype1 = get_vectype_for_scalar_type_and_size (scalar_type, sz1);
+      tree vectype1 = get_vectype_for_scalar_type_and_size (scalar_type, sz1);
       reduce_with_shift = have_whole_vector_shift (mode1);
       if (!VECTOR_MODE_P (mode1))
 	reduce_with_shift = false;