re PR debug/55541 (unable to see local variables due extra lexical block was generated)

re PR debug/55541 (unable to see local variables due extra lexical block was generated)

	PR debug/55541
	* cp-tree.h (BLOCK_OUTER_CURLY_BRACE_P): Define.
	* decl.c (poplevel): If functionbody, try not to create an extra
	BLOCK for function body and use subblocks as that, if it is non-NULL
	and doesn't have siblings.  Set BLOCK_OUTER_CURLY_BRACE_P flag.
	(outer_curly_brace_block): Use BLOCK_OUTER_CURLY_BRACE_P flag.

	* g++.dg/debug/dwarf2/localclass3.C: Adjust for the extraneous
	DW_TAG_lexical_block removal.
	* g++.dg/debug/dwarf2/redeclaration-1.C: Likewise.
	* g++.dg/guality/pr55541.C: New test.

From-SVN: r220650