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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 07ae66a..1f8c0f1 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -5758,6 +5758,18 @@ For vector memory operations the cost may depend on type (@var{vectype}) and misalignment value (@var{misalign}). @end deftypefn +@deftypefn {Target Hook} HOST_WIDE_INT TARGET_VECTORIZE_PREFERRED_VECTOR_ALIGNMENT (const_tree @var{type}) +This hook returns the preferred alignment in bits for accesses to +vectors of type @var{type} in vectorized code. This might be less than +or greater than the ABI-defined value returned by +@code{TARGET_VECTOR_ALIGNMENT}. It can be equal to the alignment of +a single element, in which case the vectorizer will not try to optimize +for alignment. + +The default hook returns @code{TYPE_ALIGN (@var{type})}, which is +correct for most targets. +@end deftypefn + @deftypefn {Target Hook} bool TARGET_VECTORIZE_VECTOR_ALIGNMENT_REACHABLE (const_tree @var{type}, bool @var{is_packed}) Return true if vector alignment is reachable (by peeling N iterations) for the given scalar type @var{type}. @var{is_packed} is false if the scalar access using @var{type} is known to be naturally aligned. @end deftypefn |