re PR tree-optimization/55329 (ICE: internal compiler error: in operator[], at vec.h:487 with -O -fno-guess-branch-probability -fnon-call-exceptions --param=early-inlining-insns=111)

	PR tree-optimization/55329
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Never clear
	bits in needed_eh_cleanup while iterating over the bitmap.
	Look through all forwarder blocks at once.

	* g++.dg/opt/pr55329.C: New test.

From-SVN: r193577