re PR debug/27574 (MIssing debug info at -O0 for a local variable in a C++ constructor)

re PR debug/27574 (MIssing debug info at -O0 for a local variable in a C++ constructor)

gcc/ChangeLog:
2008-11-12  Dodji Seketeli  <dodji@redhat.com>

	PR debug/27574
	* cgraph.h: New abstract_and_needed member to struct cgraph_node.
	* cgraphunit.c (cgraph_analyze_functions): Flag abstract functions
	- which clones are reachable - as "abstract and needed".
	* cgraph.c (cgraph_release_function_body):  If a node is "abstract and needed",
	do not release its DECL_INITIAL() content because that will be needed to emit
	debug info.

gcc/testsuite/ChangeLog:
2008-11-12  Dodji Seketeli  <dodji@redhat.com>

	PR debug/27574
	* g++.dg/debug/dwarf2/local-var-in-contructor.C: New test.

From-SVN: r141807