The following amends the documentation of slp_tree fields.
Built for x86_64-unknown-linux-gnu, pushed.
* tree-vectorizer.h (struct _slp_tree): Amend documentation.
---
gcc/tree-vectorizer.h | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index f32364d3160..35fb7afab83 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -328,16 +328,18 @@ struct _slp_tree {
/* Nodes that contain def-stmts of this node statements operands. */
vec<slp_tree> children;
- /* A group of scalar stmts to be vectorized together. */
+ /* A group of scalar stmts to be vectorized together. Unused when
+ def_type is vect_external_def or vect_costant_def. */
vec<stmt_vec_info> stmts;
- /* A group of scalar operands to be vectorized together. */
+ /* A group of scalar operands to be vectorized together. Unused
+ unless def_type is vect_external_def or vect_constant_def. */
vec<tree> ops;
/* A set of lane indices that are live and to be code-generated from
this SLP node. */
vec<unsigned> live_lanes;
/* The representative that should be used for analysis and
- code generation. */
+ code generation. NULL when code is VEC_PERM_EXPR. */
stmt_vec_info representative;
struct {
@@ -347,12 +349,14 @@ struct _slp_tree {
int reduc_idx;
} cycle_info;
- /* Load permutation relative to the stores, NULL if there is no
- permutation. */
+ /* Load permutation mapping outgoing vector lanes to lanes of
+ the single DR group the load accesses. NULL if there is no
+ permutation. Unused when this is not a load. */
load_permutation_t load_permutation;
/* Lane permutation of the operands scalar lanes encoded as pairs
of { operand number, lane number }. The number of elements
- denotes the number of output lanes. */
+ denotes the number of output lanes. Unused unless code is
+ VEC_PERM_EXPR. */
lane_permutation_t lane_permutation;
tree vectype;
@@ -371,7 +375,7 @@ struct _slp_tree {
enum vect_def_type def_type;
/* The number of scalar lanes produced by this node. */
unsigned int lanes;
- /* The operation of this node. */
+ /* The operation of this node. Either VEC_PERM_EXPR or ERROR_MARK. */
enum tree_code code;
/* For gather/scatter memory operations the scale each offset element
should be multiplied by before being added to the base. */
@@ -385,6 +389,7 @@ struct _slp_tree {
as to avoid STLF fails because of related stores. */
bool avoid_stlf_fail;
+ /* The vertex index of this node when a full graph is built. */
int vertex;
/* The kind of operation as determined by analysis and optional
--
2.51.0
