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Diffstat (limited to 'gcc/tree-vect-patterns.c')
| -rw-r--r-- | gcc/tree-vect-patterns.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c index 0ee5bbe..27080d2 100644 --- a/gcc/tree-vect-patterns.c +++ b/gcc/tree-vect-patterns.c @@ -2097,7 +2097,20 @@ vect_recog_vector_vector_shift_pattern (vec<gimple *> *stmts, if (TYPE_MODE (TREE_TYPE (rhs1)) == TYPE_MODE (TREE_TYPE (oprnd0)) && TYPE_PRECISION (TREE_TYPE (rhs1)) == TYPE_PRECISION (TREE_TYPE (oprnd0))) - def = rhs1; + { + if (TYPE_PRECISION (TREE_TYPE (oprnd1)) + >= TYPE_PRECISION (TREE_TYPE (rhs1))) + def = rhs1; + else + { + tree mask + = build_low_bits_mask (TREE_TYPE (rhs1), + TYPE_PRECISION (TREE_TYPE (oprnd1))); + def = vect_recog_temp_ssa_var (TREE_TYPE (rhs1), NULL); + def_stmt = gimple_build_assign (def, BIT_AND_EXPR, rhs1, mask); + new_pattern_def_seq (stmt_vinfo, def_stmt); + } + } } if (def == NULL_TREE) |