* [Bug middle-end/90773] Improve piecewise operation
[not found] <bug-90773-4@http.gcc.gnu.org/bugzilla/>
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--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:3bb41228d76b3a3cbd9923d57388f0903f7683de
commit r12-162-g3bb41228d76b3a3cbd9923d57388f0903f7683de
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Apr 26 15:36:18 2021 -0700
op_by_pieces_d::run: Change a while loop to a do-while loop
Change a while loop in op_by_pieces_d::run to a do-while loop to prepare
for offset adjusted operation for the remaining bytes on the last piece
operation of a memory region.
PR middle-end/90773
* expr.c (op_by_pieces_d::get_usable_mode): New member function.
(op_by_pieces_d::run): Cange a while loop to a do-while loop.
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--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:985b3a6837dee7001e6b618f073ed74f0edf5787
commit r12-285-g985b3a6837dee7001e6b618f073ed74f0edf5787
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Jun 10 09:57:15 2019 -0700
Generate offset adjusted operation for op_by_pieces operations
Add an overlap_op_by_pieces_p target hook for op_by_pieces operations
between two areas of memory to generate one offset adjusted operation
in the smallest integer mode for the remaining bytes on the last piece
operation of a memory region to avoid doing more than one smaller
operations.
Pass the RTL information from the previous iteration to m_constfn in
op_by_pieces operation so that builtin_memset_[read|gen]_str can
generate the new RTL from the previous RTL.
Tested on Linux/x86-64.
gcc/
PR middle-end/90773
* builtins.c (builtin_memcpy_read_str): Add a dummy argument.
(builtin_strncpy_read_str): Likewise.
(builtin_memset_read_str): Add an argument for the previous RTL
information and generate the new RTL from the previous RTL info.
(builtin_memset_gen_str): Likewise.
* builtins.h (builtin_strncpy_read_str): Update the prototype.
(builtin_memset_read_str): Likewise.
* expr.c (by_pieces_ninsns): If targetm.overlap_op_by_pieces_p()
returns true, round up size and alignment to the widest integer
mode for maximum size.
(pieces_addr::adjust): Add a pointer to by_pieces_prev argument
and pass it to m_constfn.
(op_by_pieces_d): Add m_push and m_overlap_op_by_pieces.
(op_by_pieces_d::op_by_pieces_d): Add a bool argument to
initialize m_push. Initialize m_overlap_op_by_pieces with
targetm.overlap_op_by_pieces_p ().
(op_by_pieces_d::run): Pass the previous RTL information to
pieces_addr::adjust and generate overlapping operations if
m_overlap_op_by_pieces is true.
(PUSHG_P): New.
(move_by_pieces_d::move_by_pieces_d): Updated for op_by_pieces_d
change.
(store_by_pieces_d::store_by_pieces_d): Updated for op_by_pieces_d
change.
(can_store_by_pieces): Use by_pieces_constfn on constfun.
(store_by_pieces): Use by_pieces_constfn on constfun. Updated
for op_by_pieces_d change.
(clear_by_pieces_1): Add a dummy argument.
(clear_by_pieces): Updated for op_by_pieces_d change.
(compare_by_pieces_d::compare_by_pieces_d): Likewise.
(string_cst_read_str): Add a dummy argument.
* expr.h (by_pieces_constfn): Add a dummy argument.
(by_pieces_prev): New.
* target.def (overlap_op_by_pieces_p): New target hook.
* config/i386/i386.c (TARGET_OVERLAP_OP_BY_PIECES_P): New.
* doc/tm.texi.in: Add TARGET_OVERLAP_OP_BY_PIECES_P.
* doc/tm.texi: Regenerated.
gcc/testsuite/
PR middle-end/90773
* g++.dg/pr90773-1.h: New test.
* g++.dg/pr90773-1a.C: Likewise.
* g++.dg/pr90773-1b.C: Likewise.
* g++.dg/pr90773-1c.C: Likewise.
* g++.dg/pr90773-1d.C: Likewise.
* gcc.target/i386/pr90773-1.c: Likewise.
* gcc.target/i386/pr90773-2.c: Likewise.
* gcc.target/i386/pr90773-3.c: Likewise.
* gcc.target/i386/pr90773-4.c: Likewise.
* gcc.target/i386/pr90773-5.c: Likewise.
* gcc.target/i386/pr90773-6.c: Likewise.
* gcc.target/i386/pr90773-7.c: Likewise.
* gcc.target/i386/pr90773-8.c: Likewise.
* gcc.target/i386/pr90773-9.c: Likewise.
* gcc.target/i386/pr90773-10.c: Likewise.
* gcc.target/i386/pr90773-11.c: Likewise.
* gcc.target/i386/pr90773-12.c: Likewise.
* gcc.target/i386/pr90773-13.c: Likewise.
* gcc.target/i386/pr90773-14.c: Likewise.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug middle-end/90773] Improve piecewise operation
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--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:86c77c52f7b812adccf9620860f7c392f9a16cfc
commit r12-313-g86c77c52f7b812adccf9620860f7c392f9a16cfc
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Apr 29 11:12:09 2021 -0700
Don't use nullptr return from simplify_gen_subreg
Check nullptr return from simplify_gen_subreg. Don't use it if it is
nullptr.
PR middle-end/90773
* builtins.c (builtin_memset_gen_str): Don't use return from
simplify_gen_subreg.
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--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:53fb833d635da04f5b44af16bcea1082e7b59e75
commit r12-978-g53fb833d635da04f5b44af16bcea1082e7b59e75
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Fri May 21 05:16:20 2021 -0700
Elide expand_constructor if move by pieces is preferred
Elide expand_constructor when the constructor is static storage and not
mostly zeros and we can move it by pieces prefer to do so since that's
usually more efficient than performing a series of stores from immediates.
2021-05-21 Richard Biener <rguenther@suse.de>
H.J. Lu <hjl.tools@gmail.com>
gcc/
PR middle-end/90773
* expr.c (expand_constructor): Elide expand_constructor if
move by pieces is preferred.
gcc/testsuite/
* gcc.target/i386/pr90773-24.c: New test.
* gcc.target/i386/pr90773-25.c: Likewise.
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--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:e5e164effa30fd2b5c5bc3e6883d63889e96d8da
commit r12-2633-ge5e164effa30fd2b5c5bc3e6883d63889e96d8da
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Sun Mar 6 06:38:21 2016 -0800
Add QI vector mode support to by-pieces for memset
1. Replace scalar_int_mode with fixed_size_mode in the by-pieces
infrastructure to allow non-integer mode.
2. Rename widest_int_mode_for_size to widest_fixed_size_mode_for_size
to return QI vector mode for memset.
3. Add op_by_pieces_d::smallest_fixed_size_mode_for_size to return the
smallest integer or QI vector mode.
4. Remove clear_by_pieces_1 and use builtin_memset_read_str in
clear_by_pieces to support vector mode broadcast.
5. Add lowpart_subreg_regno, a wrapper around simplify_subreg_regno that
uses subreg_lowpart_offset (mode, prev_mode) as the offset.
6. Add TARGET_GEN_MEMSET_SCRATCH_RTX to allow the backend to use a hard
scratch register to avoid stack realignment when expanding memset.
gcc/
PR middle-end/90773
* builtins.c (builtin_memcpy_read_str): Change the mode argument
from scalar_int_mode to fixed_size_mode.
(builtin_strncpy_read_str): Likewise.
(gen_memset_value_from_prev): New function.
(builtin_memset_read_str): Change the mode argument from
scalar_int_mode to fixed_size_mode. Use gen_memset_value_from_prev
and support CONST_VECTOR.
(builtin_memset_gen_str): Likewise.
(try_store_by_multiple_pieces): Use by_pieces_constfn to declare
constfun.
* builtins.h (builtin_strncpy_read_str): Replace scalar_int_mode
with fixed_size_mode.
(builtin_memset_read_str): Likewise.
* expr.c (widest_int_mode_for_size): Renamed to ...
(widest_fixed_size_mode_for_size): Add a bool argument to
indicate if QI vector mode can be used.
(by_pieces_ninsns): Call widest_fixed_size_mode_for_size
instead of widest_int_mode_for_size.
(pieces_addr::adjust): Change the mode argument from
scalar_int_mode to fixed_size_mode.
(op_by_pieces_d): Make m_len read-only. Add a bool member,
m_qi_vector_mode, to indicate that QI vector mode can be used.
(op_by_pieces_d::op_by_pieces_d): Add a bool argument to
initialize m_qi_vector_mode. Call widest_fixed_size_mode_for_size
instead of widest_int_mode_for_size.
(op_by_pieces_d::get_usable_mode): Change the mode argument from
scalar_int_mode to fixed_size_mode. Call
widest_fixed_size_mode_for_size instead of
widest_int_mode_for_size.
(op_by_pieces_d::smallest_fixed_size_mode_for_size): New member
function to return the smallest integer or QI vector mode.
(op_by_pieces_d::run): Call widest_fixed_size_mode_for_size
instead of widest_int_mode_for_size. Call
smallest_fixed_size_mode_for_size instead of
smallest_int_mode_for_size.
(store_by_pieces_d::store_by_pieces_d): Add a bool argument to
indicate that QI vector mode can be used and pass it to
op_by_pieces_d::op_by_pieces_d.
(can_store_by_pieces): Call widest_fixed_size_mode_for_size
instead of widest_int_mode_for_size. Pass memsetp to
widest_fixed_size_mode_for_size to support QI vector mode.
Allow all CONST_VECTORs for memset if vec_duplicate is supported.
(store_by_pieces): Pass memsetp to
store_by_pieces_d::store_by_pieces_d.
(clear_by_pieces_1): Removed.
(clear_by_pieces): Replace clear_by_pieces_1 with
builtin_memset_read_str and pass true to store_by_pieces_d to
support vector mode broadcast.
(string_cst_read_str): Change the mode argument from
scalar_int_mode to fixed_size_mode.
* expr.h (by_pieces_constfn): Change scalar_int_mode to
fixed_size_mode.
(by_pieces_prev): Likewise.
* rtl.h (lowpart_subreg_regno): New.
* rtlanal.c (lowpart_subreg_regno): New. A wrapper around
simplify_subreg_regno.
* target.def (gen_memset_scratch_rtx): New hook.
* doc/tm.texi.in: Add TARGET_GEN_MEMSET_SCRATCH_RTX.
* doc/tm.texi: Regenerated.
gcc/testsuite/
* gcc.target/i386/pr100865-3.c: Expect vmovdqu8 instead of
vmovdqu.
* gcc.target/i386/pr100865-4b.c: Likewise.
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--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 89252 has been marked as a duplicate of this bug. ***
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--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:1bee034e012d1146d34b0d767fe28a485c210e4b
commit r12-2664-g1bee034e012d1146d34b0d767fe28a485c210e4b
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Aug 2 10:01:46 2021 -0700
x86: Add TARGET_GEN_MEMSET_SCRATCH_RTX
Define TARGET_GEN_MEMSET_SCRATCH_RTX to ix86_gen_scratch_sse_rtx to
return a scratch SSE register for memset.
gcc/
PR middle-end/90773
* config/i386/i386.c (TARGET_GEN_MEMSET_SCRATCH_RTX): New.
gcc/testsuite/
PR middle-end/90773
* gcc.target/i386/pr90773-5.c: Updated to expect XMM register.
* gcc.target/i386/pr90773-14.c: Likewise.
* gcc.target/i386/pr90773-15.c: New test.
* gcc.target/i386/pr90773-16.c: Likewise.
* gcc.target/i386/pr90773-17.c: Likewise.
* gcc.target/i386/pr90773-18.c: Likewise.
* gcc.target/i386/pr90773-19.c: Likewise.
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--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:bf159e5e124838ddfdb91e0688b1df60645d4ba9
commit r12-2667-gbf159e5e124838ddfdb91e0688b1df60645d4ba9
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Aug 2 10:01:46 2021 -0700
x86: Add AVX2 tests for PR middle-end/90773
PR middle-end/90773
* gcc.target/i386/pr90773-20.c: New test.
* gcc.target/i386/pr90773-21.c: Likewise.
* gcc.target/i386/pr90773-22.c: Likewise.
* gcc.target/i386/pr90773-23.c: Likewise.
* gcc.target/i386/pr90773-26.c: Likewise.
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 12.
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--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 90599 has been marked as a duplicate of this bug. ***
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vincenzo.innocente at cern dot ch
--- Comment #15 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 80566 has been marked as a duplicate of this bug. ***
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |barry.revzin at gmail dot com
--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 89226 has been marked as a duplicate of this bug. ***
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jyasskin at gcc dot gnu.org
--- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 56511 has been marked as a duplicate of this bug. ***
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--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 74113 has been marked as a duplicate of this bug. ***
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |guillaume.melquiond at inria dot f
| |r
--- Comment #19 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 33103 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug middle-end/90773] Improve piecewise operation
[not found] <bug-90773-4@http.gcc.gnu.org/bugzilla/>
` (14 preceding siblings ...)
2021-08-22 1:26 ` hjl.tools at gmail dot com
@ 2021-10-06 23:48 ` hjl.tools at gmail dot com
15 siblings, 0 replies; 16+ messages in thread
From: hjl.tools at gmail dot com @ 2021-10-06 23:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90773
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
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CC| |crazylht at gmail dot com
--- Comment #20 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 98442 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 16+ messages in thread