re PR debug/51902 (lexical_blocks inside inlined_subroutines generate duplicate debug_ranges)

	PR debug/51902
	* tree.h (BLOCK_SAME_RANGE): Define.
	* function.c (block_fragments_nreverse): Clear BLOCK_SAME_RANGE
	if BLOCK_FRAGMENT_CHAIN is non-NULL, but has it cleared.
	Also clear BLOCK_SAME_RANGE if fragment chain's supercontext fragment
	isn't equal to supercontext fragment's fragment chain.
	Adjust BLOCK_SUPERCONTEXT to point to supercontext fragment's
	fragment origin.
	(blocks_nreverse_all): Likewise.
	(reorder_blocks_1): Compute BLOCK_SAME_RANGE bits.  Set
	BLOCK_SUPERCONTEXT to supercontext fragment instead of
	supercontext fragment's fragment origin.
	* dwarf2out.c (add_high_low_attributes): If stmt has the same
	range as its parent (or parents thereof etc.), use the parent's
	DW_AT_ranges value instead of creating a new .debug_ranges range.

From-SVN: r184958

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index 140f23e..0a2d619 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2088,6 +2088,9 @@ struct GTY(()) tree_omp_clause {
 #define BLOCK_ABSTRACT_ORIGIN(NODE) (BLOCK_CHECK (NODE)->block.abstract_origin)
 #define BLOCK_ABSTRACT(NODE) (BLOCK_CHECK (NODE)->block.abstract_flag)
 
+/* True if BLOCK has the same ranges as its BLOCK_SUPERCONTEXT.  */
+#define BLOCK_SAME_RANGE(NODE) (BLOCK_CHECK (NODE)->base.nameless_flag)
+
 /* An index number for this block.  These values are not guaranteed to
    be unique across functions -- whether or not they are depends on
    the debugging output format in use.  */