diff options
Diffstat (limited to 'gcc/tree-vectorizer.h')
| -rw-r--r-- | gcc/tree-vectorizer.h | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h index b761f4d..e32eed2 100644 --- a/gcc/tree-vectorizer.h +++ b/gcc/tree-vectorizer.h @@ -95,9 +95,15 @@ typedef struct _loop_vec_info { /* Unknown DRs according to which loop was peeled. */ struct data_reference *unaligned_dr; - /* If true, loop is peeled. - unaligned_drs show in this case DRs used for peeling. */ - bool do_peeling_for_alignment; + /* peeling_for_alignment indicates whether peeling for alignment will take + place, and what the peeling factor should be: + peeling_for_alignment = X means: + If X=0: Peeling for alignment will not be applied. + If X>0: Peel first X iterations. + If X=-1: Generate a runtime test to calculate the number of iterations + to be peeled, using the dataref recorded in the field + unaligned_dr. */ + int peeling_for_alignment; /* All data references in the loop that are being written to. */ varray_type data_ref_writes; @@ -119,7 +125,7 @@ typedef struct _loop_vec_info { #define LOOP_VINFO_DATAREF_WRITES(L) (L)->data_ref_writes #define LOOP_VINFO_DATAREF_READS(L) (L)->data_ref_reads #define LOOP_VINFO_INT_NITERS(L) (TREE_INT_CST_LOW ((L)->num_iters)) -#define LOOP_DO_PEELING_FOR_ALIGNMENT(L) (L)->do_peeling_for_alignment +#define LOOP_PEELING_FOR_ALIGNMENT(L) (L)->peeling_for_alignment #define LOOP_VINFO_UNALIGNED_DR(L) (L)->unaligned_dr #define LOOP_VINFO_LOC(L) (L)->loop_line_number @@ -242,7 +248,8 @@ vinfo_for_stmt (tree stmt) /* Info on data references alignment. */ /*-----------------------------------------------------------------*/ -/* The misalignment of the memory access in bytes. */ +/* Reflects actual alignment of first access in the vectorized loop, + taking into account peeling/versioning if applied. */ #define DR_MISALIGNMENT(DR) (DR)->aux static inline bool @@ -252,9 +259,9 @@ aligned_access_p (struct data_reference *data_ref_info) } static inline bool -unknown_alignment_for_access_p (struct data_reference *data_ref_info) +known_alignment_for_access_p (struct data_reference *data_ref_info) { - return (DR_MISALIGNMENT (data_ref_info) == -1); + return (DR_MISALIGNMENT (data_ref_info) != -1); } /* Perform signed modulo, always returning a non-negative value. */ |