From 359b060e79c2fc423b733229205a9cfbcd634a0a Mon Sep 17 00:00:00 2001 From: Bin Cheng Date: Fri, 5 May 2017 18:34:45 +0000 Subject: [PATCH] Makefile.in (GTFILES): Add tree-ssa-loop-ivopts.c. * Makefile.in (GTFILES): Add tree-ssa-loop-ivopts.c. * tree-ssa-loop-ivopts.c (compute_max_addr_offset): Delete. (addr_list, addr_offset_valid_p): New. (split_address_groups): Check offset validity with above function. (gt-tree-ssa-loop-ivopts.h): Include header file. From-SVN: r247653 --- gcc/ChangeLog | 8 ++++ gcc/Makefile.in | 2 +- gcc/tree-ssa-loop-ivopts.c | 115 +++++++++++++++++---------------------------- 3 files changed, 51 insertions(+), 74 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b2796b1..5bcf206 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2017-05-05 Bin Cheng + + * Makefile.in (GTFILES): Add tree-ssa-loop-ivopts.c. + * tree-ssa-loop-ivopts.c (compute_max_addr_offset): Delete. + (addr_list, addr_offset_valid_p): New. + (split_address_groups): Check offset validity with above function. + (gt-tree-ssa-loop-ivopts.h): Include header file. + 2017-05-05 Nathan Sidwell * config.gcc (arm*-*-*): Add missing 'fi'. diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 2411671..97259ac 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -2484,7 +2484,7 @@ GTFILES = $(CPP_ID_DATA_H) $(srcdir)/input.h $(srcdir)/coretypes.h \ $(srcdir)/gimple-ssa.h \ $(srcdir)/tree-chkp.c \ $(srcdir)/tree-ssanames.c $(srcdir)/tree-eh.c $(srcdir)/tree-ssa-address.c \ - $(srcdir)/tree-cfg.c \ + $(srcdir)/tree-cfg.c $(srcdir)/tree-ssa-loop-ivopts.c \ $(srcdir)/tree-dfa.c \ $(srcdir)/tree-iterator.c $(srcdir)/gimple-expr.c \ $(srcdir)/tree-chrec.h \ diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index adb985b..d865fd2 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -2459,67 +2459,36 @@ find_interesting_uses_outside (struct ivopts_data *data, edge exit) } } -/* Compute maximum offset of [base + offset] addressing mode - for memory reference represented by USE. */ +/* Return TRUE if OFFSET is within the range of [base + offset] addressing + mode for memory reference represented by USE. */ -static HOST_WIDE_INT -compute_max_addr_offset (struct iv_use *use) +static GTY (()) vec *addr_list; + +static bool +addr_offset_valid_p (struct iv_use *use, HOST_WIDE_INT offset) { - int width; rtx reg, addr; - HOST_WIDE_INT i, off; - unsigned list_index, num; - addr_space_t as; - machine_mode mem_mode, addr_mode; - static vec max_offset_list; - - as = TYPE_ADDR_SPACE (TREE_TYPE (use->iv->base)); - mem_mode = TYPE_MODE (TREE_TYPE (*use->op_p)); + unsigned list_index; + addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (use->iv->base)); + machine_mode addr_mode, mem_mode = TYPE_MODE (TREE_TYPE (*use->op_p)); - num = max_offset_list.length (); list_index = (unsigned) as * MAX_MACHINE_MODE + (unsigned) mem_mode; - if (list_index >= num) - { - max_offset_list.safe_grow (list_index + MAX_MACHINE_MODE); - for (; num < max_offset_list.length (); num++) - max_offset_list[num] = -1; - } + if (list_index >= vec_safe_length (addr_list)) + vec_safe_grow_cleared (addr_list, list_index + MAX_MACHINE_MODE); - off = max_offset_list[list_index]; - if (off != -1) - return off; - - addr_mode = targetm.addr_space.address_mode (as); - reg = gen_raw_REG (addr_mode, LAST_VIRTUAL_REGISTER + 1); - addr = gen_rtx_fmt_ee (PLUS, addr_mode, reg, NULL_RTX); - - width = GET_MODE_BITSIZE (addr_mode) - 1; - if (width > (HOST_BITS_PER_WIDE_INT - 1)) - width = HOST_BITS_PER_WIDE_INT - 1; - - for (i = width; i > 0; i--) + addr = (*addr_list)[list_index]; + if (!addr) { - off = (HOST_WIDE_INT_1U << i) - 1; - XEXP (addr, 1) = gen_int_mode (off, addr_mode); - if (memory_address_addr_space_p (mem_mode, addr, as)) - break; - - /* For some strict-alignment targets, the offset must be naturally - aligned. Try an aligned offset if mem_mode is not QImode. */ - off = (HOST_WIDE_INT_1U << i); - if (off > GET_MODE_SIZE (mem_mode) && mem_mode != QImode) - { - off -= GET_MODE_SIZE (mem_mode); - XEXP (addr, 1) = gen_int_mode (off, addr_mode); - if (memory_address_addr_space_p (mem_mode, addr, as)) - break; - } + addr_mode = targetm.addr_space.address_mode (as); + reg = gen_raw_REG (addr_mode, LAST_VIRTUAL_REGISTER + 1); + addr = gen_rtx_fmt_ee (PLUS, addr_mode, reg, NULL_RTX); + (*addr_list)[list_index] = addr; } - if (i == 0) - off = 0; + else + addr_mode = GET_MODE (addr); - max_offset_list[list_index] = off; - return off; + XEXP (addr, 1) = gen_int_mode (offset, addr_mode); + return (memory_address_addr_space_p (mem_mode, addr, as)); } /* Comparison function to sort group in ascending order of addr_offset. */ @@ -2598,14 +2567,12 @@ static void split_address_groups (struct ivopts_data *data) { unsigned int i, j; - HOST_WIDE_INT max_offset = -1; - - /* Reset max offset to split all small groups. */ - if (split_small_address_groups_p (data)) - max_offset = 0; + /* Always split group. */ + bool split_p = split_small_address_groups_p (data); for (i = 0; i < data->vgroups.length (); i++) { + struct iv_group *new_group = NULL; struct iv_group *group = data->vgroups[i]; struct iv_use *use = group->vuses[0]; @@ -2614,29 +2581,29 @@ split_address_groups (struct ivopts_data *data) if (group->vuses.length () == 1) continue; - if (max_offset != 0) - max_offset = compute_max_addr_offset (use); + gcc_assert (group->type == USE_ADDRESS); - for (j = 1; j < group->vuses.length (); j++) + for (j = 1; j < group->vuses.length ();) { struct iv_use *next = group->vuses[j]; + HOST_WIDE_INT offset = next->addr_offset - use->addr_offset; - /* Only uses with offset that can fit in offset part against - the first use can be grouped together. */ - if (next->addr_offset - use->addr_offset - > (unsigned HOST_WIDE_INT) max_offset) - break; + /* Split group if aksed to, or the offset against the first + use can't fit in offset part of addressing mode. IV uses + having the same offset are still kept in one group. */ + if (offset != 0 && + (split_p || !addr_offset_valid_p (use, offset))) + { + if (!new_group) + new_group = record_group (data, group->type); + group->vuses.ordered_remove (j); + new_group->vuses.safe_push (next); + continue; + } next->id = j; next->group_id = group->id; - } - /* Split group. */ - if (j < group->vuses.length ()) - { - struct iv_group *new_group = record_group (data, group->type); - new_group->vuses.safe_splice (group->vuses); - new_group->vuses.block_remove (0, j); - group->vuses.truncate (j); + j++; } } } @@ -7853,3 +7820,5 @@ tree_ssa_iv_optimize (void) tree_ssa_iv_optimize_finalize (&data); } + +#include "gt-tree-ssa-loop-ivopts.h" -- 2.7.4