mbox series

[v3,0/2] Generate offset adjusted operation for op_by_pieces operations

Message ID 20210427011426.479089-1-hjl.tools@gmail.com
Headers show
Series Generate offset adjusted operation for op_by_pieces operations | expand

Message

H.J. Lu April 27, 2021, 1:14 a.m. UTC 
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