diff options
Diffstat (limited to 'gcc/tree-ssa-strlen.c')
| -rw-r--r-- | gcc/tree-ssa-strlen.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/gcc/tree-ssa-strlen.c b/gcc/tree-ssa-strlen.c index 6dd37fb..93d095e 100644 --- a/gcc/tree-ssa-strlen.c +++ b/gcc/tree-ssa-strlen.c @@ -1140,10 +1140,16 @@ get_range_strlen_dynamic (tree src, c_strlen_data *pdata, bitmap *visited, { tree basetype = TREE_TYPE (base); tree size = TYPE_SIZE_UNIT (basetype); - ++off; /* Increment for the terminating nul. */ - pdata->maxlen = fold_build2 (MINUS_EXPR, size_type_node, size, - build_int_cst (size_type_node, off)); - pdata->maxbound = pdata->maxlen; + if (TREE_CODE (size) == INTEGER_CST) + { + ++off; /* Increment for the terminating nul. */ + tree toffset = build_int_cst (size_type_node, off); + pdata->maxlen = fold_build2 (MINUS_EXPR, size_type_node, size, + toffset); + pdata->maxbound = pdata->maxlen; + } + else + pdata->maxlen = build_all_ones_cst (size_type_node); } else pdata->maxlen = build_all_ones_cst (size_type_node); |