/* Function bump_vector_ptr
Increment a pointer (to a vector type) by vector-size. Connect the new
- increment stmt to the exising def-use update-chain of the pointer.
+ increment stmt to the existing def-use update-chain of the pointer.
The pointer def-use update-chain before this function:
DATAREF_PTR = phi (p_0, p_2)
stmts operating on wider types we need to create 'VF/nunits' "copies" of the
vector stmt (each computing a vector of 'nunits' results, and together
computing 'VF' results in each iteration). This function is called when
- vectorizing such a stmt (e.g. vectorizing S2 in the illusration below, in
+ vectorizing such a stmt (e.g. vectorizing S2 in the illustration below, in
which VF=16 and nuniti=4, so the number of copies required is 4):
scalar stmt: vectorized into: STMT_VINFO_RELATED_STMT
/* Function vect_permute_store_chain.
- Given a chain of interleaved strores in DR_CHAIN of LENGTH that must be
+ Given a chain of interleaved stores in DR_CHAIN of LENGTH that must be
a power of 2, generate interleave_high/low stmts to reorder the data
correctly for the stores. Return the final references for stores in
RESULT_CHAIN.
E.g., LENGTH is 4 and the scalar type is short, i.e., VF is 8.
- The input is 4 vectors each containg 8 elements. We assign a number to each
+ The input is 4 vectors each containing 8 elements. We assign a number to each
element, the input sequence is:
1st vec: 0 1 2 3 4 5 6 7
and of interleave_low: 2 6 3 7
- The permutaion is done in log LENGTH stages. In each stage interleave_high
+ The permutation is done in log LENGTH stages. In each stage interleave_high
and interleave_low stmts are created for each pair of vectors in DR_CHAIN,
where the first argument is taken from the first half of DR_CHAIN and the
second argument from it's second half.
And they are put in STMT_VINFO_VEC_STMT of the corresponding scalar stmts
(the order of the data-refs in the output of vect_permute_store_chain
corresponds to the order of scalar stmts in the interleaving chain - see
- the documentaion of vect_permute_store_chain()).
+ the documentation of vect_permute_store_chain()).
In case of both multiple types and interleaving, above vector stores and
permutation stmts are created for every copy. The result vector stmts are
correctly. Return the final references for loads in RESULT_CHAIN.
E.g., LENGTH is 4 and the scalar type is short, i.e., VF is 8.
- The input is 4 vectors each containg 8 elements. We assign a number to each
+ The input is 4 vectors each containing 8 elements. We assign a number to each
element, the input sequence is:
1st vec: 0 1 2 3 4 5 6 7
and of extract_odd: 1 3 5 7
- The permutaion is done in log LENGTH stages. In each stage extract_even and
+ The permutation is done in log LENGTH stages. In each stage extract_even and
extract_odd stmts are created for each pair of vectors in DR_CHAIN in their
order. In our example,
And they are put in STMT_VINFO_VEC_STMT of the corresponding scalar stmts
(the order of the data-refs in the output of vect_permute_load_chain
corresponds to the order of scalar stmts in the interleaving chain - see
- the documentaion of vect_permute_load_chain()).
+ the documentation of vect_permute_load_chain()).
The generation of permutation stmts and recording them in
STMT_VINFO_VEC_STMT is done in vect_transform_strided_load().
if (DR_GROUP_FIRST_DR (stmt_info))
{
- /* For interleaved access element size must be multipled by the size of
+ /* For interleaved access element size must be multiplied by the size of
the interleaved group. */
group_size = DR_GROUP_SIZE (vinfo_for_stmt (
DR_GROUP_FIRST_DR (stmt_info)));
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