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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-10-26 11:28:25 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-10-26 11:28:25 +0000 |
| commit | f073de07ad00d4be604bdbaeab14786850932601 (patch) | |
| tree | 825db4f6d56d10a34af45d9e3c9e8dcaf128e151 /gcc/config/spu | |
| parent | 4bc19a3b1a9fe74e515b7c54082bbad27decc227 (diff) | |
| download | gcc-f073de07ad00d4be604bdbaeab14786850932601.zip gcc-f073de07ad00d4be604bdbaeab14786850932601.tar.gz gcc-f073de07ad00d4be604bdbaeab14786850932601.tar.bz2 | |
This patch adds a new hook that gives the preferred alignment for a static rtx...
TARGET_STATIC_RTX_ALIGNMENT
This patch adds a new hook that gives the preferred alignment for
a static rtx, so that we don't need to query the front end in
force_const_mem.
2017-10-26 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* target.def (static_rtx_alignment): New hook.
* targhooks.h (default_static_rtx_alignment): Declare.
* targhooks.c (default_static_rtx_alignment): New function.
* doc/tm.texi.in (TARGET_STATIC_RTX_ALIGNMENT): New hook.
* doc/tm.texi: Regenerate.
* varasm.c (force_const_mem): Use targetm.static_rtx_alignment
instead of targetm.constant_alignment. Remove call to
set_mem_attributes.
* config/cris/cris.c (TARGET_STATIC_RTX_ALIGNMENT): Redefine.
(cris_preferred_mininum_alignment): New function, split out from...
(cris_constant_alignment): ...here.
(cris_static_rtx_alignment): New function.
* config/i386/i386.c (ix86_static_rtx_alignment): New function,
split out from...
(ix86_constant_alignment): ...here.
(TARGET_STATIC_RTX_ALIGNMENT): Redefine.
* config/mmix/mmix.c (TARGET_STATIC_RTX_ALIGNMENT): Redefine.
(mmix_static_rtx_alignment): New function.
* config/spu/spu.c (spu_static_rtx_alignment): New function.
(TARGET_STATIC_RTX_ALIGNMENT): Redefine.
From-SVN: r254102
Diffstat (limited to 'gcc/config/spu')
| -rw-r--r-- | gcc/config/spu/spu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/config/spu/spu.c b/gcc/config/spu/spu.c index eda7fca..bf21cca 100644 --- a/gcc/config/spu/spu.c +++ b/gcc/config/spu/spu.c @@ -7196,6 +7196,18 @@ spu_truly_noop_truncation (unsigned int outprec, unsigned int inprec) return inprec <= 32 && outprec <= inprec; } +/* Implement TARGET_STATIC_RTX_ALIGNMENT. + + Make all static objects 16-byte aligned. This allows us to assume + they are also padded to 16 bytes, which means we can use a single + load or store instruction to access them. */ + +static HOST_WIDE_INT +spu_static_rtx_alignment (machine_mode mode) +{ + return MAX (GET_MODE_ALIGNMENT (mode), 128); +} + /* Implement TARGET_CONSTANT_ALIGNMENT. Make all static objects 16-byte aligned. This allows us to assume @@ -7447,6 +7459,8 @@ static const struct attribute_spec spu_attribute_table[] = #undef TARGET_TRULY_NOOP_TRUNCATION #define TARGET_TRULY_NOOP_TRUNCATION spu_truly_noop_truncation +#undef TARGET_STATIC_RTX_ALIGNMENT +#define TARGET_STATIC_RTX_ALIGNMENT spu_static_rtx_alignment #undef TARGET_CONSTANT_ALIGNMENT #define TARGET_CONSTANT_ALIGNMENT spu_constant_alignment |