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, 11 deletions

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 7d6280b..49f49c5 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4136,7 +4136,6 @@ ix86_setup_incoming_vararg_bounds (cumulative_args_t cum_v,
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   CUMULATIVE_ARGS next_cum;
   tree fntype;
-  int max;
 
   gcc_assert (!no_rtl);
 
@@ -4152,10 +4151,6 @@ ix86_setup_incoming_vararg_bounds (cumulative_args_t cum_v,
   if (stdarg_p (fntype))
     ix86_function_arg_advance (pack_cumulative_args (&next_cum), mode, type,
 			       true);
-
-  max = cum->regno + cfun->va_list_gpr_size / UNITS_PER_WORD;
-  if (max > X86_64_REGPARM_MAX)
-    max = X86_64_REGPARM_MAX;
 }
 
 
@@ -6291,7 +6286,6 @@ choose_basereg (HOST_WIDE_INT cfa_offset, rtx &base_reg,
 	    {
 	      base_reg = hard_frame_pointer_rtx;
 	      base_offset = toffset;
-	      len = tlen;
 	    }
 	}
     }
@@ -8003,8 +7997,7 @@ ix86_expand_prologue (void)
 				   GEN_INT (-allocate), -1, false);
 
       /* Align the stack.  */
-      insn = emit_insn (gen_and2_insn (stack_pointer_rtx,
-				       GEN_INT (-align_bytes)));
+      emit_insn (gen_and2_insn (stack_pointer_rtx, GEN_INT (-align_bytes)));
       m->fs.sp_offset = ROUND_UP (m->fs.sp_offset, align_bytes);
       m->fs.sp_realigned_offset = m->fs.sp_offset
 					      - frame.stack_realign_allocate;
@@ -18176,12 +18169,10 @@ ix86_preferred_reload_class (rtx x, reg_class_t regclass)
 static reg_class_t
 ix86_preferred_output_reload_class (rtx x, reg_class_t regclass)
 {
-  machine_mode mode = GET_MODE (x);
-
   /* Restrict the output reload class to the register bank that we are doing
      math on.  If we would like not to return a subset of CLASS, reject this
      alternative: if reload cannot do this, it will still use its choice.  */
-  mode = GET_MODE (x);
+  machine_mode mode = GET_MODE (x);
   if (SSE_FLOAT_MODE_P (mode) && TARGET_SSE_MATH)
     return MAYBE_SSE_CLASS_P (regclass) ? ALL_SSE_REGS : NO_REGS;