From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 32005 invoked by alias); 1 Sep 2011 19:27:47 -0000 Received: (qmail 31995 invoked by uid 22791); 1 Sep 2011 19:27:45 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_AV,TW_JL X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 01 Sep 2011 19:27:32 +0000 From: "vries at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/50251] [4.7 Regression] Revision 178353 caused many test failures Date: Thu, 01 Sep 2011 19:27:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vries at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: vries at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-09/txt/msg00072.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50251 --- Comment #7 from vries at gcc dot gnu.org 2011-09-01 19:26:48 UTC --- > fold_builtin_alloca_for_var should record stack alignment change After expand_var for D.2129 with 128-bit alignment, x_rtl looks like this: ... (gdb) p x_rtl $20 = {expr = {x_pending_stack_adjust = 0, x_inhibit_defer_pop = 0, x_stack_pointer_delta = 0, x_saveregs_value = 0x0, x_apply_args_value = 0x0, x_forced_labels = 0x0}, emit = {x_reg_rtx_no = 70, x_first_label_num = 11, x_first_insn = 0x0, x_last_insn = 0x0, sequence_stack = 0xf7d5557c, x_cur_insn_uid = 2, x_cur_debug_insn_uid = 1, x_last_location = 0, regno_pointer_align_length = 159, regno_pointer_align = 0x981a428 ""}, varasm = {pool = 0xf7df9294, deferred_constants = 0}, args = {pops_args = 0, size = 0, pretend_args_size = 0, arg_offset_rtx = 0x0, info = {words = 0, nregs = 0, regno = 0, fastcall = 0, sse_words = 0, sse_nregs = 0, warn_avx = 0, warn_sse = 0, warn_mmx = 0, sse_regno = 0, mmx_words = 0, mmx_nregs = 0, mmx_regno = 0, maybe_vaarg = 0, caller = 0, float_in_sse = 0, call_abi = SYSV_ABI}, internal_arg_pointer = 0x0}, subsections = {hot_section_label = 0x0, cold_section_label = 0x0, hot_section_end_label = 0x0, cold_section_end_label = 0x0}, eh = {ehr_stackadj = 0x0, ehr_handler = 0x0, ehr_label = 0x0, sjlj_fc = 0x0, sjlj_exit_after = 0x0, action_record_data = 0x0, call_site_record = {0x0, 0x0}}, outgoing_args_size = 0, return_rtx = 0x0, hard_reg_initial_vals = 0x0, stack_protect_guard = 0x0, x_nonlocal_goto_handler_labels = 0x0, x_return_label = 0x0, x_naked_return_label = 0x0, x_stack_slot_list = 0x0, frame_space_list = 0x0, x_stack_check_probe_note = 0x0, x_arg_pointer_save_area = 0x0, drap_reg = 0x0, x_frame_offset = 0, x_parm_birth_insn = 0x0, x_used_temp_slots = 0x0, x_avail_temp_slots = 0x0, x_temp_slot_level = 0, stack_alignment_needed = 128, preferred_stack_boundary = 32, parm_stack_boundary = 0, max_used_stack_slot_alignment = 128, stack_alignment_estimated = 128, epilogue_delay_list = 0x0, accesses_prior_frames = false, calls_eh_return = false, saves_all_registers = false, has_nonlocal_goto = false, has_asm_statement = false, all_throwers_are_sibcalls = false, limit_stack = false, profile = false, uses_const_pool = false, uses_pic_offset_table = false, uses_eh_lsda = false, tail_call_emit = false, arg_pointer_save_area_init = false, frame_pointer_needed = false, maybe_hot_insn_p = true, stack_realign_needed = false, stack_realign_tried = false, need_drap = false, stack_realign_processed = false, stack_realign_finalized = false, dbr_scheduled_p = false, nothrow = false, asm_clobbers = {0, 0}} ... These are the relevant values set by expand_one_var: ... stack_alignment_estimated = 128 stack_alignment_needed = 128 max_used_stack_slot_alignment = 128 ... Is there anything needed that expand_var doesn't do?