diff options
| author | Richard Sandiford <richard.sandiford@linaro.org> | 2018-01-13 17:50:13 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2018-01-13 17:50:13 +0000 |
| commit | 646e47bcd15483fcafcc695efefd7a0ddeb4c716 (patch) | |
| tree | 24aedf96f7279bcfe8e5ea3de20792e7d0f722dc /gcc/ChangeLog | |
| parent | 729f495ad78e2596d166707444941b382dbfc29a (diff) | |
| download | gcc-646e47bcd15483fcafcc695efefd7a0ddeb4c716.zip gcc-646e47bcd15483fcafcc695efefd7a0ddeb4c716.tar.gz gcc-646e47bcd15483fcafcc695efefd7a0ddeb4c716.tar.bz2 | |
Extra subreg fold for variable-length CONST_VECTORs
The SVE support for the new CONST_VECTOR encoding needs to be able
to extract the first N bits of the vector and duplicate it. This patch
adds a simplify_subreg rule for that.
The code is covered by the gcc.target/aarch64/sve_slp_*.c tests.
2018-01-13 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* simplify-rtx.c (simplify_immed_subreg): Add an inner_bytes
parameter and use it instead of GET_MODE_SIZE (innermode). Use
inner_bytes * BITS_PER_UNIT instead of GET_MODE_BITSIZE (innermode).
Use CEIL (inner_bytes, GET_MODE_UNIT_SIZE (innermode)) instead of
GET_MODE_NUNITS (innermode). Also add a first_elem parameter.
Change innermode from fixed_mode_size to machine_mode.
(simplify_subreg): Update call accordingly. Handle a constant-sized
subreg of a variable-length CONST_VECTOR.
From-SVN: r256610
Diffstat (limited to 'gcc/ChangeLog')
| -rw-r--r-- | gcc/ChangeLog | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 561fd70..3f1919e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,4 +1,15 @@ 2018-01-13 Richard Sandiford <richard.sandiford@linaro.org> + + * simplify-rtx.c (simplify_immed_subreg): Add an inner_bytes + parameter and use it instead of GET_MODE_SIZE (innermode). Use + inner_bytes * BITS_PER_UNIT instead of GET_MODE_BITSIZE (innermode). + Use CEIL (inner_bytes, GET_MODE_UNIT_SIZE (innermode)) instead of + GET_MODE_NUNITS (innermode). Also add a first_elem parameter. + Change innermode from fixed_mode_size to machine_mode. + (simplify_subreg): Update call accordingly. Handle a constant-sized + subreg of a variable-length CONST_VECTOR. + +2018-01-13 Richard Sandiford <richard.sandiford@linaro.org> Alan Hayward <alan.hayward@arm.com> David Sherwood <david.sherwood@arm.com> |