diff options
| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-09-19 09:04:28 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-09-19 09:04:28 +0000 |
| commit | f24f4c15884bf1ee65a10e2f959842eec4198876 (patch) | |
| tree | 36f90ba89bf92546561ae999a4a48cd9c5a4704f /gcc/defaults.h | |
| parent | 4736041b5aa5681c44cbb9c183b11bbb781492fc (diff) | |
| download | gcc-f24f4c15884bf1ee65a10e2f959842eec4198876.zip gcc-f24f4c15884bf1ee65a10e2f959842eec4198876.tar.gz gcc-f24f4c15884bf1ee65a10e2f959842eec4198876.tar.bz2 | |
Rework constant subreg folds and handle more variable-length cases
This patch rewrites the way simplify_subreg handles constants.
It uses similar native_encode/native_decode routines to the
tree-level handling of VIEW_CONVERT_EXPR, meaning that we can
move between rtx constants and the target memory image of them.
The main point of this patch is to support subregs of constant-length
vectors for VLA vectors, beyond the very simple cases that were already
handled. Many of the new tests failed before the patch for variable-
length vectors.
The boolean side is tested more by the upcoming SVE ACLE work.
2019-09-19 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* defaults.h (TARGET_UNIT): New macro.
(target_unit): New type.
* rtl.h (native_encode_rtx, native_decode_rtx)
(native_decode_vector_rtx, subreg_size_lsb): Declare.
(subreg_lsb_1): Turn into an inline wrapper around subreg_size_lsb.
* rtlanal.c (subreg_lsb_1): Delete.
(subreg_size_lsb): New function.
* simplify-rtx.c: Include rtx-vector-builder.h
(simplify_immed_subreg): Delete.
(native_encode_rtx, native_decode_vector_rtx, native_decode_rtx)
(simplify_const_vector_byte_offset, simplify_const_vector_subreg): New
functions.
(simplify_subreg): Use them.
(test_vector_subregs_modes, test_vector_subregs_repeating)
(test_vector_subregs_fore_back, test_vector_subregs_stepped)
(test_vector_subregs): New functions.
(test_vector_ops): Call test_vector_subregs for integer vector
modes with at least 2 elements.
From-SVN: r275959
Diffstat (limited to 'gcc/defaults.h')
| -rw-r--r-- | gcc/defaults.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/defaults.h b/gcc/defaults.h index af7ea18..72d4fba 100644 --- a/gcc/defaults.h +++ b/gcc/defaults.h @@ -1459,4 +1459,18 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB #endif +#ifndef USED_FOR_TARGET +/* Done this way to keep gengtype happy. */ +#if BITS_PER_UNIT == 8 +#define TARGET_UNIT uint8_t +#elif BITS_PER_UNIT == 16 +#define TARGET_UNIT uint16_t +#elif BITS_PER_UNIT == 32 +#define TARGET_UNIT uint32_t +#else +#error Unknown BITS_PER_UNIT +#endif +typedef TARGET_UNIT target_unit; +#endif + #endif /* ! GCC_DEFAULTS_H */ |