diff options
Diffstat (limited to 'gcc/tree-phinodes.c')
| -rw-r--r-- | gcc/tree-phinodes.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/tree-phinodes.c b/gcc/tree-phinodes.c index 89fbb3d..e7883e3 100644 --- a/gcc/tree-phinodes.c +++ b/gcc/tree-phinodes.c @@ -396,10 +396,10 @@ remove_phi_arg_num (tree phi, int i) PHI_ARG_NONZERO (phi, i) = PHI_ARG_NONZERO (phi, num_elem - 1); } - /* Shrink the vector and return. */ - SET_PHI_ARG_DEF (phi, num_elem - 1, NULL_TREE); - PHI_ARG_EDGE (phi, num_elem - 1) = NULL; - PHI_ARG_NONZERO (phi, num_elem - 1) = false; + /* Shrink the vector and return. Note that we do not have to clear + PHI_ARG_DEF, PHI_ARG_EDGE, or PHI_ARG_NONZERO because the garbage + collector will not look at those elements beyond the first + PHI_NUM_ARGS elements of the array. */ PHI_NUM_ARGS (phi)--; } |