diff options
Diffstat (limited to 'gcc/tree-ssa-loop-niter.cc')
| -rw-r--r-- | gcc/tree-ssa-loop-niter.cc | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/gcc/tree-ssa-loop-niter.cc b/gcc/tree-ssa-loop-niter.cc index 4ffcef4..3fbbf43 100644 --- a/gcc/tree-ssa-loop-niter.cc +++ b/gcc/tree-ssa-loop-niter.cc @@ -3716,18 +3716,17 @@ idx_infer_loop_bounds (tree base, tree *idx, void *dta) struct ilb_data *data = (struct ilb_data *) dta; tree ev, init, step; tree low, high, type, next; - bool sign, upper = true, at_end = false; + bool sign, upper = true, has_flexible_size = false; class loop *loop = data->loop; if (TREE_CODE (base) != ARRAY_REF) return true; - /* For arrays at the end of the structure, we are not guaranteed that they - do not really extend over their declared size. However, for arrays of - size greater than one, this is unlikely to be intended. */ - if (array_at_struct_end_p (base)) + /* For arrays that might have flexible sizes, it is not guaranteed that they + do not really extend over their declared size. */ + if (array_ref_flexible_size_p (base)) { - at_end = true; + has_flexible_size = true; upper = false; } @@ -3760,9 +3759,9 @@ idx_infer_loop_bounds (tree base, tree *idx, void *dta) sign = tree_int_cst_sign_bit (step); type = TREE_TYPE (step); - /* The array of length 1 at the end of a structure most likely extends + /* The array that might have flexible size most likely extends beyond its bounds. */ - if (at_end + if (has_flexible_size && operand_equal_p (low, high, 0)) return true; |