diff options
Diffstat (limited to 'gcc/tree-phinodes.c')
| -rw-r--r-- | gcc/tree-phinodes.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/gcc/tree-phinodes.c b/gcc/tree-phinodes.c index 75e7630..5e85aea 100644 --- a/gcc/tree-phinodes.c +++ b/gcc/tree-phinodes.c @@ -406,14 +406,20 @@ remove_phi_arg_num (tree phi, int i) gcc_assert (i < num_elem); - /* Delink the last item, which is being removed. */ - delink_imm_use (&(PHI_ARG_IMM_USE_NODE (phi, num_elem - 1))); - /* If we are not at the last element, switch the last element - with the element we want to delete. */ + /* Delink the item which is being removed. */ + delink_imm_use (&(PHI_ARG_IMM_USE_NODE (phi, i))); + + /* If it is not the last element, move the last element + to the element we want to delete, resetting all the links. */ if (i != num_elem - 1) { - SET_PHI_ARG_DEF (phi, i, PHI_ARG_DEF (phi, num_elem - 1)); + use_operand_p old_p, new_p; + old_p = &PHI_ARG_IMM_USE_NODE (phi, num_elem - 1); + new_p = &PHI_ARG_IMM_USE_NODE (phi, i); + /* Set use on new node, and link into last elements's place. */ + *(new_p->use) = *(old_p->use); + relink_imm_use (new_p, old_p); } /* Shrink the vector and return. Note that we do not have to clear |