diff options
Diffstat (limited to 'gcc/rust/backend/rust-tree.cc')
| -rw-r--r-- | gcc/rust/backend/rust-tree.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-tree.cc b/gcc/rust/backend/rust-tree.cc index 8e39408..6f7614d 100644 --- a/gcc/rust/backend/rust-tree.cc +++ b/gcc/rust/backend/rust-tree.cc @@ -17,6 +17,7 @@ // <http://www.gnu.org/licenses/>. #include "rust-tree.h" +#include "fold-const.h" #include "stringpool.h" #include "attribs.h" #include "escaped_string.h" @@ -656,4 +657,21 @@ get_fndecl_from_callee (tree fn) return NULL_TREE; } +tree +pointer_offset_expression (tree base_tree, tree index_tree, location_t location) +{ + tree element_type_tree = TREE_TYPE (TREE_TYPE (base_tree)); + if (base_tree == error_mark_node || TREE_TYPE (base_tree) == error_mark_node + || index_tree == error_mark_node || element_type_tree == error_mark_node) + return error_mark_node; + + tree element_size = TYPE_SIZE_UNIT (element_type_tree); + index_tree = fold_convert_loc (location, sizetype, index_tree); + tree offset + = fold_build2_loc (location, MULT_EXPR, sizetype, index_tree, element_size); + + return fold_build2_loc (location, POINTER_PLUS_EXPR, TREE_TYPE (base_tree), + base_tree, offset); +} + } // namespace Rust |