diff options
Diffstat (limited to 'gcc/tree-phinodes.c')
| -rw-r--r-- | gcc/tree-phinodes.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-phinodes.c b/gcc/tree-phinodes.c index ba46c786459..5c5be3f7742 100644 --- a/gcc/tree-phinodes.c +++ b/gcc/tree-phinodes.c @@ -254,9 +254,11 @@ resize_phi_node (tree *phi, int len) gcc_assert (len >= PHI_ARG_CAPACITY (*phi)); - /* Note that OLD_SIZE is guaranteed to be smaller than SIZE. */ + /* The garbage collector will not look at the PHI node beyond the + first PHI_NUM_ARGS elements. Therefore, all we have to copy is a + portion of the PHI node currently in use. */ old_size = (sizeof (struct tree_phi_node) - + (PHI_ARG_CAPACITY (*phi) - 1) * sizeof (struct phi_arg_d)); + + (PHI_NUM_ARGS (*phi) - 1) * sizeof (struct phi_arg_d)); new_phi = allocate_phi_node (len); |
