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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-07-03 13:36:45 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-07-03 13:36:45 +0000 |
| commit | 832b4117d4068670cc9ed496a7ab06104a12dc00 (patch) | |
| tree | 212a6cb0ef5981580051a51ecd93ab60de8b92c8 /gcc/tree-data-ref.h | |
| parent | e054a1852bf903139a80f34c726453d34338e008 (diff) | |
| download | gcc-832b4117d4068670cc9ed496a7ab06104a12dc00.zip gcc-832b4117d4068670cc9ed496a7ab06104a12dc00.tar.gz gcc-832b4117d4068670cc9ed496a7ab06104a12dc00.tar.bz2 | |
Add DR_STEP_ALIGNMENT
A later patch adds base alignment information to innermost_loop_behavior.
After that, the only remaining piece of alignment information that wasn't
immediately obvious was the step alignment. Adding that allows a minor
simplification to vect_compute_data_ref_alignment, and also potentially
improves the handling of variable strides for outer loop vectorisation.
A later patch will also use it to give the alignment of the DR as a whole.
2017-07-03 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* tree-data-ref.h (innermost_loop_behavior): Add a step_alignment
field.
(DR_STEP_ALIGNMENT): New macro.
* tree-vectorizer.h (STMT_VINFO_DR_STEP_ALIGNMENT): Likewise.
* tree-data-ref.c (dr_analyze_innermost): Initalize step_alignment.
(create_data_ref): Print it.
* tree-vect-stmts.c (vectorizable_load): Use the step alignment
to tell whether the step preserves vector (mis)alignment.
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Likewise.
Move the check for an integer step and generalise to all INTEGER_CST.
(vect_analyze_data_refs): Set DR_STEP_ALIGNMENT when setting DR_STEP.
Print the outer step alignment.
From-SVN: r249915
Diffstat (limited to 'gcc/tree-data-ref.h')
| -rw-r--r-- | gcc/tree-data-ref.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-data-ref.h b/gcc/tree-data-ref.h index 45ecf9b..3a5068d 100644 --- a/gcc/tree-data-ref.h +++ b/gcc/tree-data-ref.h @@ -56,6 +56,9 @@ struct innermost_loop_behavior high value if the offset is zero. This is a byte rather than a bit quantity. */ unsigned int offset_alignment; + + /* Likewise for STEP. */ + unsigned int step_alignment; }; /* Describes the evolutions of indices of the memory reference. The indices @@ -145,6 +148,7 @@ struct data_reference #define DR_STEP(DR) (DR)->innermost.step #define DR_PTR_INFO(DR) (DR)->alias.ptr_info #define DR_OFFSET_ALIGNMENT(DR) (DR)->innermost.offset_alignment +#define DR_STEP_ALIGNMENT(DR) (DR)->innermost.step_alignment #define DR_INNERMOST(DR) (DR)->innermost typedef struct data_reference *data_reference_p; |