tree 48fd75f319b1168a6c83c1a82249f45a6951bea2
parent 47b6dfef9d8d581fbe83ee50bc737be01a9a0748
author Xan Phung <xan.phung@gmail.com> 1579768061 +0800
committer Luc Van Oostenryck <luc.vanoostenryck@gmail.com> 1580281173 +0100

domtree: domtree_build() creates extraneous bb->doms entries

Each time domtree_build gets called, extraneous/duplicated child nodes
get left in the bb->doms ptrlist. This is because the existing children
are not cleared from bb->doms before rebuilding it.

In addition to consuming memory, the extraneous child nodes result
in a malformed dominance tree.

The following 3 line patch fixes this problem by freeing the dominator
tree before rebuilding it.

Signed-off-by: Xan Phung <xan.phung@gmail.com>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>