diff options
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index c592fa4..7ebdda8 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -1740,6 +1740,15 @@ layout_type (type) element_size = integer_one_node; } + /* If neither bound is a constant and sizetype is signed, make + sure the size is never negative. We should really do this + if *either* bound is non-constant, but this is the best + compromise between C and Ada. */ + if (! TREE_UNSIGNED (sizetype) + && TREE_CODE (TYPE_MIN_VALUE (index)) != INTEGER_CST + && TREE_CODE (TYPE_MAX_VALUE (index)) != INTEGER_CST) + length = size_binop (MAX_EXPR, length, size_zero_node); + TYPE_SIZE (type) = size_binop (MULT_EXPR, element_size, convert (bitsizetype, length)); |