diff options
Diffstat (limited to 'gcc/gimplify.cc')
| -rw-r--r-- | gcc/gimplify.cc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/gimplify.cc b/gcc/gimplify.cc index f9e7060..b828ddb 100644 --- a/gcc/gimplify.cc +++ b/gcc/gimplify.cc @@ -6031,6 +6031,21 @@ gimplify_modify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, return GS_ALL_DONE; } + /* Convert initialization from an empty variable-size CONSTRUCTOR to + memset. */ + if (TREE_TYPE (*from_p) != error_mark_node + && TYPE_SIZE_UNIT (TREE_TYPE (*from_p)) + && !poly_int_tree_p (TYPE_SIZE_UNIT (TREE_TYPE (*from_p))) + && TREE_CODE (*from_p) == CONSTRUCTOR + && CONSTRUCTOR_NELTS (*from_p) == 0) + { + maybe_with_size_expr (from_p); + gcc_assert (TREE_CODE (*from_p) == WITH_SIZE_EXPR); + return gimplify_modify_expr_to_memset (expr_p, + TREE_OPERAND (*from_p, 1), + want_value, pre_p); + } + /* Insert pointer conversions required by the middle-end that are not required by the frontend. This fixes middle-end type checking for for example gcc.dg/redecl-6.c. */ |