diff options
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index e8bed2504bf..bb31fef7014 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -6133,6 +6133,21 @@ discover_nonconstant_array_refs_r (tree * tp, int *walk_subtrees, *walk_subtrees = 0; } + /* References of size POLY_INT_CST to a fixed-size object must go + through memory. It's more efficient to force that here than + to create temporary slots on the fly. */ + else if ((TREE_CODE (t) == MEM_REF || TREE_CODE (t) == TARGET_MEM_REF) + && TYPE_SIZE (TREE_TYPE (t)) + && POLY_INT_CST_P (TYPE_SIZE (TREE_TYPE (t)))) + { + tree base = get_base_address (t); + if (base + && DECL_P (base) + && DECL_MODE (base) != BLKmode + && GET_MODE_SIZE (DECL_MODE (base)).is_constant ()) + TREE_ADDRESSABLE (base) = 1; + *walk_subtrees = 0; + } return NULL_TREE; } |