From: "H.J. Lu" <hjl.tools@gmail.com>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH v3 0/2] Generate offset adjusted operation for op_by_pieces operations
Date: Mon, 26 Apr 2021 18:14:24 -0700 [thread overview]
Message-ID: <20210427011426.479089-1-hjl.tools@gmail.com> (raw)
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.
The v3 changes:
1. Split changing a while loop in op_by_pieces_d::run to a do-while loop
into a separate patch for easier review.
2. Simplify the builtin_memset_read_str change.
3. Document that offset adjusted operation is unaligned.
The v2 changes are:
1. Added a target hook, TARGET_OVERLAP_OP_BY_PIECES_P.
2. Added a pointer argument to pieces_addr::adjust to pass the RTL
information from the previous iteraton to m_constfn.
3. Updated builtin_memset_read_str and builtin_memset_gen_str to
generate the new RTL from the previous RTL info.
H.J. Lu (2):
op_by_pieces_d::run: Change a while loop to a do-while loop
Generate offset adjusted operation for op_by_pieces operations
gcc/builtins.c | 36 ++++-
gcc/builtins.h | 6 +-
gcc/config/i386/i386.c | 3 +
gcc/doc/tm.texi | 7 +
gcc/doc/tm.texi.in | 2 +
gcc/expr.c | 171 ++++++++++++++++-----
gcc/expr.h | 10 +-
gcc/target.def | 9 ++
gcc/testsuite/g++.dg/pr90773-1.h | 14 ++
gcc/testsuite/g++.dg/pr90773-1a.C | 13 ++
gcc/testsuite/g++.dg/pr90773-1b.C | 5 +
gcc/testsuite/g++.dg/pr90773-1c.C | 5 +
gcc/testsuite/g++.dg/pr90773-1d.C | 19 +++
gcc/testsuite/gcc.target/i386/pr90773-1.c | 17 ++
gcc/testsuite/gcc.target/i386/pr90773-10.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-11.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-12.c | 11 ++
gcc/testsuite/gcc.target/i386/pr90773-13.c | 11 ++
gcc/testsuite/gcc.target/i386/pr90773-14.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-2.c | 20 +++
gcc/testsuite/gcc.target/i386/pr90773-3.c | 23 +++
gcc/testsuite/gcc.target/i386/pr90773-4.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-5.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-6.c | 11 ++
gcc/testsuite/gcc.target/i386/pr90773-7.c | 11 ++
gcc/testsuite/gcc.target/i386/pr90773-8.c | 13 ++
gcc/testsuite/gcc.target/i386/pr90773-9.c | 13 ++
27 files changed, 446 insertions(+), 49 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/pr90773-1.h
create mode 100644 gcc/testsuite/g++.dg/pr90773-1a.C
create mode 100644 gcc/testsuite/g++.dg/pr90773-1b.C
create mode 100644 gcc/testsuite/g++.dg/pr90773-1c.C
create mode 100644 gcc/testsuite/g++.dg/pr90773-1d.C
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-1.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-10.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-11.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-12.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-13.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-14.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-2.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-3.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-4.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-5.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-6.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-7.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-8.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr90773-9.c
--
2.31.1
next reply other threads:[~2021-04-27 1:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 1:14 H.J. Lu [this message]
2021-04-27 1:14 ` [PATCH v3 1/2] op_by_pieces_d::run: Change a while loop to a do-while loop H.J. Lu
2021-04-27 13:05 ` Richard Biener
2021-04-27 1:14 ` [PATCH v3 2/2] Generate offset adjusted operation for op_by_pieces operations H.J. Lu
2021-04-29 11:08 ` Richard Biener
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