convert many uses of pointer_map to hash_map

convert many uses of pointer_map to hash_map

gcc/c-family/

	* cilk.c: Use hash_map instead of pointer_map.

gcc/c/

	* c-typeck.c: Use hash_map instead of pointer_map.

gcc/cp/

	* optimize.c, semantics.c: Use hash_map instead of pointer_map.

gcc/

	* hash-map.h (default_hashmap_traits::mark_key_deleted):
	Fix cast.
	(hash_map::remove): New method.
(hash_map::traverse): New method.
	* cgraph.h, except.c, except.h, gimple-ssa-strength-reduction.c,
	ipa-utils.c, lto-cgraph.c, lto-streamer.h, omp-low.c, predict.c,
	tree-cfg.c, tree-cfgcleanup.c, tree-eh.c, tree-eh.h, tree-inline.c,
	tree-inline.h, tree-nested.c, tree-sra.c, tree-ssa-loop-im.c,
	tree-ssa-loop-ivopts.c, tree-ssa-reassoc.c, tree-ssa-structalias.c,
	tree-ssa.c, tree-ssa.h, var-tracking.c: Use hash_map instead of
 pointer_map.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@213517 138bc75d-0d04-0410-961f-82ee72b054a4