/* Loop Vectorization
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Dorit Naishlos <dorit@il.ibm.com>
This file is part of GCC.
#ifndef GCC_TREE_VECTORIZER_H
#define GCC_TREE_VECTORIZER_H
+#ifdef USE_MAPPED_LOCATION
+ typedef source_location LOC;
+ #define UNKNOWN_LOC UNKNOWN_LOCATION
+ #define EXPR_LOC(e) EXPR_LOCATION(e)
+ #define LOC_FILE(l) LOCATION_FILE (l)
+ #define LOC_LINE(l) LOCATION_LINE (l)
+#else
+ typedef source_locus LOC;
+ #define UNKNOWN_LOC NULL
+ #define EXPR_LOC(e) EXPR_LOCUS(e)
+ #define LOC_FILE(l) (l)->file
+ #define LOC_LINE(l) (l)->line
+#endif
+
/* Used for naming of new temporaries. */
enum vect_var_kind {
vect_simple_var,
binary_op
};
+/* Define type of available alignment support. */
+enum dr_alignment_support {
+ dr_unaligned_unsupported,
+ dr_unaligned_supported,
+ dr_unaligned_software_pipeline,
+ dr_aligned
+};
+
+/* Define verbosity levels. */
+enum verbosity_levels {
+ REPORT_NONE,
+ REPORT_VECTORIZED_LOOPS,
+ REPORT_UNVECTORIZED_LOOPS,
+ REPORT_ALIGNMENT,
+ REPORT_BAD_FORM_LOOPS,
+ REPORT_OUTER_LOOPS,
+ REPORT_DETAILS,
+ /* New verbosity levels should be added before this one. */
+ MAX_VERBOSITY_LEVEL
+};
+
+/*-----------------------------------------------------------------*/
+/* Info on vectorized loops. */
+/*-----------------------------------------------------------------*/
+typedef struct _loop_vec_info {
+
+ /* The loop to which this info struct refers to. */
+ struct loop *loop;
+
+ /* The loop basic blocks. */
+ basic_block *bbs;
+
+ /* The loop exit_condition. */
+ tree exit_cond;
+
+ /* Number of iterations. */
+ tree num_iters;
+
+ /* Is the loop vectorizable? */
+ bool vectorizable;
+
+ /* Unrolling factor */
+ int vectorization_factor;
+
+ /* Unknown DRs according to which loop was peeled. */
+ struct data_reference *unaligned_dr;
+
+ /* 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;
+
+ /* All data references in the loop that are being read from. */
+ varray_type data_ref_reads;
+
+ /* The loop location in the source. */
+ LOC loop_line_number;
+} *loop_vec_info;
+
+/* Access Functions. */
+#define LOOP_VINFO_LOOP(L) (L)->loop
+#define LOOP_VINFO_BBS(L) (L)->bbs
+#define LOOP_VINFO_EXIT_COND(L) (L)->exit_cond
+#define LOOP_VINFO_NITERS(L) (L)->num_iters
+#define LOOP_VINFO_VECTORIZABLE_P(L) (L)->vectorizable
+#define LOOP_VINFO_VECT_FACTOR(L) (L)->vectorization_factor
+#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_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
+
+#define LOOP_LOC(L) LOOP_VINFO_LOC(L)
+
+
+#define LOOP_VINFO_NITERS_KNOWN_P(L) \
+(host_integerp ((L)->num_iters,0) \
+&& TREE_INT_CST_LOW ((L)->num_iters) > 0)
+
/*-----------------------------------------------------------------*/
/* Info on vectorized defs. */
/*-----------------------------------------------------------------*/
/* The stmt to which this info struct refers to. */
tree stmt;
- /* The loop with respect to which STMT is vectorized. */
- struct loop *loop;
+ /* The loop_vec_info with respect to which STMT is vectorized. */
+ loop_vec_info loop_vinfo;
/* Not all stmts in the loop need to be vectorized. e.g, the incrementation
of the loop induction variable and computation of array indexes. relevant
/* Aliasing information. */
tree memtag;
-
- /* Data reference base. This field holds the entire invariant part of the
- data-reference (with respect to the relevant loop), as opposed to the
- field DR_BASE of the STMT_VINFO_DATA_REF struct, which holds only the
- initial base; e.g:
- REF BR_BASE VECT_DR_BASE
- a[i] a a
- a[i][j] a a[i] */
- tree vect_dr_base;
+ struct ptr_info_def *ptr_info;
+ subvar_t subvars;
+
+ /** The following fields are used to store the information about
+ data-reference. {base_address + initial_offset} is the first location
+ accessed by data-ref in the loop, and step is the stride of data-ref in
+ the loop in bytes;
+ e.g.:
+
+ Example 1 Example 2
+ data-ref a[j].b[i][j] a + 4B (a is int*)
+
+ base_address &a a
+ initial_offset j_0*D_j + i_0*D_i + C 4
+ step D_j 4
+
+ data-reference structure info:
+ base_name a NULL
+ access_fn <access_fns of indexes of b> (0, +, 1)
+
+ **/
+ /* The above base_address, offset and step. */
+ tree base_address;
+ tree initial_offset;
+ tree step;
+
+ /* Alignment information. Whether the base of the data-reference is aligned
+ to vectype. */
+ bool base_aligned_p;
+ /* Alignment information. The offset of the data-reference from its base
+ in bytes. */
+ tree misalignment;
} *stmt_vec_info;
/* Access Functions. */
-#define STMT_VINFO_TYPE(S) (S)->type
-#define STMT_VINFO_STMT(S) (S)->stmt
-#define STMT_VINFO_LOOP(S) (S)->loop
-#define STMT_VINFO_RELEVANT_P(S) (S)->relevant
-#define STMT_VINFO_VECTYPE(S) (S)->vectype
-#define STMT_VINFO_VEC_STMT(S) (S)->vectorized_stmt
-#define STMT_VINFO_DATA_REF(S) (S)->data_ref_info
-#define STMT_VINFO_MEMTAG(S) (S)->memtag
-#define STMT_VINFO_VECT_DR_BASE(S) (S)->vect_dr_base
+#define STMT_VINFO_TYPE(S) (S)->type
+#define STMT_VINFO_STMT(S) (S)->stmt
+#define STMT_VINFO_LOOP_VINFO(S) (S)->loop_vinfo
+#define STMT_VINFO_RELEVANT_P(S) (S)->relevant
+#define STMT_VINFO_VECTYPE(S) (S)->vectype
+#define STMT_VINFO_VEC_STMT(S) (S)->vectorized_stmt
+#define STMT_VINFO_DATA_REF(S) (S)->data_ref_info
+#define STMT_VINFO_MEMTAG(S) (S)->memtag
+#define STMT_VINFO_PTR_INFO(S) (S)->ptr_info
+#define STMT_VINFO_SUBVARS(S) (S)->subvars
+#define STMT_VINFO_VECT_DR_BASE_ADDRESS(S)(S)->base_address
+#define STMT_VINFO_VECT_INIT_OFFSET(S) (S)->initial_offset
+#define STMT_VINFO_VECT_STEP(S) (S)->step
+#define STMT_VINFO_VECT_BASE_ALIGNED_P(S) (S)->base_aligned_p
+#define STMT_VINFO_VECT_MISALIGNMENT(S) (S)->misalignment
static inline void set_stmt_info (stmt_ann_t ann, stmt_vec_info stmt_info);
static inline stmt_vec_info 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
-#define MAX_NUMBER_OF_UNALIGNED_DATA_REFS 1
static inline bool
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. */
#define VECT_SMODULO(x,y) ((x) % (y) < 0 ? ((x) % (y) + (y)) : (x) % (y))
-
-/*-----------------------------------------------------------------*/
-/* Info on vectorized loops. */
-/*-----------------------------------------------------------------*/
-typedef struct _loop_vec_info {
-
- /* The loop to which this info struct refers to. */
- struct loop *loop;
-
- /* The loop basic blocks. */
- basic_block *bbs;
-
- /* The loop exit_condition. */
- tree exit_cond;
-
- /* Number of iterations. */
- tree num_iters;
-
- /* Is the loop vectorizable? */
- bool vectorizable;
-
- /* Unrolling factor */
- int vectorization_factor;
-
- /* Unknown DRs according to which loop was peeled. */
- struct data_reference *unaligned_drs [MAX_NUMBER_OF_UNALIGNED_DATA_REFS];
-
- /* If true, loop is peeled.
- unaligned_drs show in this case DRs used for peeling. */
- bool do_peeling_for_alignment;
-
- /* All data references in the loop that are being written to. */
- varray_type data_ref_writes;
-
- /* All data references in the loop that are being read from. */
- varray_type data_ref_reads;
-} *loop_vec_info;
-
-/* Access Functions. */
-#define LOOP_VINFO_LOOP(L) (L)->loop
-#define LOOP_VINFO_BBS(L) (L)->bbs
-#define LOOP_VINFO_EXIT_COND(L) (L)->exit_cond
-#define LOOP_VINFO_NITERS(L) (L)->num_iters
-#define LOOP_VINFO_VECTORIZABLE_P(L) (L)->vectorizable
-#define LOOP_VINFO_VECT_FACTOR(L) (L)->vectorization_factor
-#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_UNALIGNED_DR(L, I) (L)->unaligned_drs[(I)]
-
-
-#define LOOP_VINFO_NITERS_KNOWN_P(L) \
-(host_integerp ((L)->num_iters,0) \
-&& TREE_INT_CST_LOW ((L)->num_iters) > 0)
+/* vect_dump will be set to stderr or dump_file if exist. */
+extern FILE *vect_dump;
+extern enum verbosity_levels vect_verbosity_level;
/*-----------------------------------------------------------------*/
/* Function prototypes. */
/*-----------------------------------------------------------------*/
+/*************************************************************************
+ Simple Loop Peeling Utilities - in tree-vectorizer.c
+ *************************************************************************/
+/* Entry point for peeling of simple loops.
+ Peel the first/last iterations of a loop.
+ It can be used outside of the vectorizer for loops that are simple enough
+ (see function documentation). In the vectorizer it is used to peel the
+ last few iterations when the loop bound is unknown or does not evenly
+ divide by the vectorization factor, and to peel the first few iterations
+ to force the alignment of data references in the loop. */
+extern struct loop *slpeel_tree_peel_loop_to_edge
+ (struct loop *, struct loops *, edge, tree, tree, bool);
+extern void slpeel_make_loop_iterate_ntimes (struct loop *, tree);
+extern bool slpeel_can_duplicate_loop_p (struct loop *, edge);
+#ifdef ENABLE_CHECKING
+extern void slpeel_verify_cfg_after_peeling (struct loop *, struct loop *);
+#endif
+
+
+/*************************************************************************
+ General Vectorization Utilities
+ *************************************************************************/
+/** In tree-vectorizer.c **/
+extern tree vect_strip_conversion (tree);
+extern tree get_vectype_for_scalar_type (tree);
+extern bool vect_is_simple_use (tree , loop_vec_info, tree *);
+extern bool vect_is_simple_iv_evolution (unsigned, tree, tree *, tree *);
+extern bool vect_can_force_dr_alignment_p (tree, unsigned int);
+extern enum dr_alignment_support vect_supportable_dr_alignment
+ (struct data_reference *);
+/* Creation and deletion of loop and stmt info structs. */
+extern loop_vec_info new_loop_vec_info (struct loop *loop);
+extern void destroy_loop_vec_info (loop_vec_info);
+extern stmt_vec_info new_stmt_vec_info (tree stmt, loop_vec_info);
/* Main driver. */
extern void vectorize_loops (struct loops *);
-/* creation and deletion of loop and stmt info structs. */
-extern loop_vec_info new_loop_vec_info (struct loop *loop);
-extern void destroy_loop_vec_info (loop_vec_info);
-extern stmt_vec_info new_stmt_vec_info (tree stmt, struct loop *loop);
+/** In tree-vect-analyze.c **/
+/* Driver for analysis stage. */
+extern loop_vec_info vect_analyze_loop (struct loop *);
+
+/** In tree-vect-transform.c **/
+extern bool vectorizable_load (tree, block_stmt_iterator *, tree *);
+extern bool vectorizable_store (tree, block_stmt_iterator *, tree *);
+extern bool vectorizable_operation (tree, block_stmt_iterator *, tree *);
+extern bool vectorizable_assignment (tree, block_stmt_iterator *, tree *);
+/* Driver for transformation stage. */
+extern void vect_transform_loop (loop_vec_info, struct loops *);
+
+/*************************************************************************
+ Vectorization Debug Information - in tree-vectorizer.c
+ *************************************************************************/
+extern bool vect_print_dump_info (enum verbosity_levels, LOC);
+extern void vect_set_verbosity_level (const char *);
+extern LOC find_loop_location (struct loop *);
#endif /* GCC_TREE_VECTORIZER_H */
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