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4a00c76146
* tree-vect-stmts.c (vectorizable_conversion): Rewritten to handle
not just FLOAT_EXPR and FIX_TRUNC_EXPR, but also CONVERT_EXPR_CODE_P,
WIDEN_MULT_EXPR and WIDEN_LSHIFT_EXPR to handle what
vectorizable_type_demotion and vectorizable_type_promotion did.
Additionally handle FLOAT_EXPR and FIX_TRUNC_EXPR where the integer
is {,un}signed {char,short}.
(vect_create_vectorized_demotion_stmts): Fix comment typo. For
recursive calls unconditionally use VEC_PACK_TRUNC_EXPR.
Push vec_dest back to the vec_dsts vector at the end.
(vect_create_vectorized_promotion_stmts): Don't recurse, do just
one step. Removed multi_step_cvt, vec_dsts, slp_node and
prev_stmt_info arguments, add vec_dest argument. Push always
into vec_tmp, not just when multi_step_cvt != 0, replace *vec_oprdn0
with vec_tmp at the end after freeing old *vec_oprnd0 vector.
(vectorizable_type_demotion, vectorizable_type_promotion): Removed.
(vect_analyze_stmt): Don't call vectorizable_type_demotion and
vectorizable_type_promotion. Call vectorizable_conversion even
for SLP bb vectorization.
(vect_transform_stmt): Call vectorizable_conversion instead of
vectorizable_type_demotion and vectorizable_type_promotion.
(supportable_widening_operation): Clear *multi_step_cvt first,
simplify c1/c2 computation, free *interm_types vector on failure.
(supportable_narrowing_operation): Clear *multi_step_cvt first,
free *interm_types vector on failure, handle multi-step
FIX_TRUNC_EXPR.
* gcc.dg/torture/vec-cvt-1.c: New test.
From-SVN: r180932
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