PR target/29487
	* tree.h (DECL_REPLACEABLE_P): New macro.
	* except.c (set_nothrow_function_flags): Likewise.

	PR target/29487
	* decl.c (finish_function): Use DECL_REPLACEABLE.
	* tree.c (cp_cannot_inline_tree_fn): Likewise.

	PR c++/29487
	* g++.dg/eh/weak1-C: New test.
	* g++.dg/eh/weak1-a.cc: Likewise.
	* g++.dg/eh/comdat1.C: Likewise.

From-SVN: r121819