gcc/ChangeLog: PR debug/41343 PR debug/41447 PR debug/41264 PR debug/41338 * tree.def (DEBUG_EXPR_DECL): New. * rtl.def (DEBUG_EXPR): New. * gengtype.c (adjust_field_rtx_def): Handle it. * tree-ssa.c (propagate_var_def_into_debug_stmts): Rename to... (insert_debug_temp_for_var_def): ... this. Drop support for moving. Take iterator for def stmt; insert debug stmt before it. Scan early for use count and kind in debug stmts. (propagate_defs_into_debug_stmts): Rename to... (insert_debug_temps_for_defs): ... this. Likewise. * tree.h (DEBUG_TEMP_UID): New. * tree.c (next_debug_decl_uid): New. (make_node_stat): Count debug decls separately. (copy_node_stat): Likewise. * cfgexpand.c (expand_debug_expr): Handle DEBUG_EXPR_DECL. * var-tracking.c (dv_is_decl_p): Recognize it. (VALUE_RECURSED_INTO): Apply to DEBUG_EXPRs too. (track_expr_p): Track expanded DEBUG_EXPR_DECLs. (vt_expand_loc_callback): Expand DEBUG_EXPRs. (emit_note_insn_var_location): Don't emit notes for DEBUG_EXPR_DECLs. * cselib.c (rtx_equal_for_cselib_p): Handle DEBUG_EXPR. (cselib_hash_rtx): Likewise. (cselib_expand_value_rtx_1): Use callback for DEBUG_EXPR. * tree-ssa-operands.c (get_expr_operands): Skip DEBUG_EXPR_DECLs in debug bind stmts. * emit-rtl.c (verify_rtx_sharing): Handle DEBUG_EXPR and VALUE. (copy_rtx_if_shared_1, reset_used_flags, set_used_flags): Likewise. * rtl.c (copy_rtx): Likewise. (rtx_equal_p_cb, rtx_equal_p): Handle DEBUG_EXPR. * print-rtl.c (print_rtx): Likewise. * sched-vis.c (print_value): Likewise. (print_insn): Handle DEBUG_EXPR_DECL. * tree-dump.c (dequeue_and_dump): Likewise. * tree-pretty-print.c (dump_decl_name, dump_generic_node): Likewise. * gimple-iterator (gsi_replace): Check for same lhs. (gsi_remove): Insert debug temps. * tree-ssa-loop-im.c (rewrite_reciprocal): Replace with same lhs. (move_computations_stmt): Drop explicit propagation into debug stmts. (rewrite_bittest): Likewise. Use gsi_remove for propagation. * tree-ssa-reassoc.c (rewrite_expr_tree, linearize_expr): Likewise. * tree-ssa-sink.c (statement_sink_location): Likewise. * tree-ssa-forwprop (forward_propagate_addr_expr): Likewise. * tree-ssanames.c (release_ssa_name): Adjust for rename. * tree-flow.h: Likewise. * tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Don't mark debug temps without values. (eliminate_unnecessary_stmts): Don't discard just-inserted debug stmts. gcc/testsuite/ChangeLog: PR debug/41343 PR debug/41447 PR debug/41264 PR debug/41338 * gcc.dg/guality/pr41447-1.c: New. * gcc.dg/debug/pr41264-1.c: New. * gcc.dg/debug/pr41343-1.c: New. From-SVN: r152681
