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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-16 10:40:23 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-16 10:40:23 +0000 |
| commit | dcbcc6595805cbe6fa77f2a4cf991e0764e89101 (patch) | |
| tree | 5423a73f6ef55339cc766316b3d0e9113cf70129 /gcc/tree-vectorizer.h | |
| parent | 5424ecb338d6160fb3e95d64c8e0e6fca2b6aabf (diff) | |
Optionally pick the cheapest loop_vec_info
This patch adds a mode in which the vectoriser tries each available
base vector mode and picks the one with the lowest cost. The new
behaviour is selected by autovectorize_vector_modes.
The patch keeps the current behaviour of preferring a VF of
loop->simdlen over any larger or smaller VF, regardless of costs
or target preferences.
2019-11-16 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* target.h (VECT_COMPARE_COSTS): New constant.
* target.def (autovectorize_vector_modes): Return a bitmask of flags.
* doc/tm.texi: Regenerate.
* targhooks.h (default_autovectorize_vector_modes): Update accordingly.
* targhooks.c (default_autovectorize_vector_modes): Likewise.
* config/aarch64/aarch64.c (aarch64_autovectorize_vector_modes):
Likewise.
* config/arc/arc.c (arc_autovectorize_vector_modes): Likewise.
* config/arm/arm.c (arm_autovectorize_vector_modes): Likewise.
* config/i386/i386.c (ix86_autovectorize_vector_modes): Likewise.
* config/mips/mips.c (mips_autovectorize_vector_modes): Likewise.
* tree-vectorizer.h (_loop_vec_info::vec_outside_cost)
(_loop_vec_info::vec_inside_cost): New member variables.
* tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Initialize them.
(vect_better_loop_vinfo_p, vect_joust_loop_vinfos): New functions.
(vect_analyze_loop): When autovectorize_vector_modes returns
VECT_COMPARE_COSTS, try vectorizing the loop with each available
vector mode and picking the one with the lowest cost.
(vect_estimate_min_profitable_iters): Record the computed costs
in the loop_vec_info.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@278336 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-vectorizer.h')
| -rw-r--r-- | gcc/tree-vectorizer.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h index fd88084554d..0eac5bdef88 100644 --- a/gcc/tree-vectorizer.h +++ b/gcc/tree-vectorizer.h @@ -601,6 +601,13 @@ public: /* Cost of a single scalar iteration. */ int single_scalar_iteration_cost; + /* The cost of the vector prologue and epilogue, including peeled + iterations and set-up code. */ + int vec_outside_cost; + + /* The cost of the vector loop body. */ + int vec_inside_cost; + /* Is the loop vectorizable? */ bool vectorizable; |