From f31e515fd519fe6ec3dc0b5cf5b1388fd1373ba4 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Fri, 15 Nov 2019 14:37:57 +0000 Subject: [PATCH] Fix vector/scalar to vector/vector conversion (PR92515) r278235 broke conversions of vector/scalar shifts into vector/vector shifts on targets that only provide the latter. We need to record whether a conversion is required in that case too. Also, the old useless_type_conversion_p condition seemed unnecessarily strong, since the shift amount can have a different signedness from the shifted value and its vector type is never assumed to be identical to vectype. The patch therefore uses tree_nop_conversion_p instead. 2019-11-15 Richard Sandiford gcc/ PR tree-optimization/92515 * tree-vect-stmts.c (vectorizable_shift): Record incompatible op1 types when converting a vector/scalar shift into a vector/vector one, using tree_nop_conversion_p instead of useless_type_conversion_p. Move the conversion code to the transform block. From-SVN: r278295 --- gcc/ChangeLog | 8 ++++++++ gcc/tree-vect-stmts.c | 26 +++++++++++--------------- 2 files changed, 19 insertions(+), 15 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9784821..619afc5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2019-11-15 Richard Sandiford + + PR tree-optimization/92515 + * tree-vect-stmts.c (vectorizable_shift): Record incompatible op1 + types when converting a vector/scalar shift into a vector/vector one, + using tree_nop_conversion_p instead of useless_type_conversion_p. + Move the conversion code to the transform block. + 2019-11-15 Matthew Malcomson * read-rtl-function.c diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c index a65b4cb..6164946 100644 --- a/gcc/tree-vect-stmts.c +++ b/gcc/tree-vect-stmts.c @@ -5750,21 +5750,9 @@ vectorizable_shift (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi, the rhs being int, instead of the same type as the lhs, so make sure the scalar is the right type if we are dealing with vectors of long long/long/short/char. */ - if (dt[1] == vect_constant_def) - { - if (!slp_node) - op1 = fold_convert (TREE_TYPE (vectype), op1); - } - else if (!useless_type_conversion_p (TREE_TYPE (vectype), - TREE_TYPE (op1))) - { - if (vec_stmt && !slp_node) - { - op1 = fold_convert (TREE_TYPE (vectype), op1); - op1 = vect_init_vector (stmt_info, op1, - TREE_TYPE (vectype), NULL); - } - } + incompatible_op1_vectype_p + = !tree_nop_conversion_p (TREE_TYPE (vectype), + TREE_TYPE (op1)); } } } @@ -5819,6 +5807,14 @@ vectorizable_shift (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi, dump_printf_loc (MSG_NOTE, vect_location, "transform binary/unary operation.\n"); + if (incompatible_op1_vectype_p && !slp_node) + { + op1 = fold_convert (TREE_TYPE (vectype), op1); + if (dt[1] != vect_constant_def) + op1 = vect_init_vector (stmt_info, op1, + TREE_TYPE (vectype), NULL); + } + /* Handle def. */ vec_dest = vect_create_destination_var (scalar_dest, vectype); -- 2.7.4