diff options
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 2da76ce..aee68d3 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1697,12 +1697,8 @@ merge_pointed_to_info (struct alias_info *ai, tree dest, tree orig) { struct ptr_info_def *dest_pi, *orig_pi; - /* FIXME: It is erroneous to call this function with identical - nodes, however that currently occurs during bootstrap. This check - stops further breakage. PR 18307 documents the issue. */ - if (dest == orig) - return; - + gcc_assert (dest != orig); + /* Make sure we have points-to information for ORIG. */ collect_points_to_info_for (ai, orig); @@ -1938,7 +1934,9 @@ collect_points_to_info_r (tree var, tree stmt, void *data) break; case SSA_NAME: - merge_pointed_to_info (ai, lhs, var); + /* Avoid unnecessary merges. */ + if (lhs != var) + merge_pointed_to_info (ai, lhs, var); break; default: |