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Diffstat (limited to 'gcc/tree-data-ref.c')
| -rw-r--r-- | gcc/tree-data-ref.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c index ab76853..b7f9a57 100644 --- a/gcc/tree-data-ref.c +++ b/gcc/tree-data-ref.c @@ -4770,6 +4770,30 @@ find_data_references_in_loop (struct loop *loop, return NULL_TREE; } +/* Return the alignment in bytes that DRB is guaranteed to have at all + times. */ + +unsigned int +dr_alignment (innermost_loop_behavior *drb) +{ + /* Get the alignment of BASE_ADDRESS + INIT. */ + unsigned int alignment = drb->base_alignment; + unsigned int misalignment = (drb->base_misalignment + + TREE_INT_CST_LOW (drb->init)); + if (misalignment != 0) + alignment = MIN (alignment, misalignment & -misalignment); + + /* Cap it to the alignment of OFFSET. */ + if (!integer_zerop (drb->offset)) + alignment = MIN (alignment, drb->offset_alignment); + + /* Cap it to the alignment of STEP. */ + if (!integer_zerop (drb->step)) + alignment = MIN (alignment, drb->step_alignment); + + return alignment; +} + /* Recursive helper function. */ static bool |