>> Is there a way to detect that basic blocks have the same range even >> though they have different block numbers? Or am I not looking/thinking >> about this issue correctly?
I may be oversimplifying this, but it seems that gen_inlined_subroutine_die generates a DW_AT_ranges list, then calls decls_for_scope, which results in a call to gen_lexical_block_die, which generates another DW_AT_ranges list, but in both cases, BLOCK_FRAGMENT_CHAIN(stmt) points to the same list of block fragments. I'd think you could just keep a single-entry cache in add_high_low_attributes that remembers the last value of BLOCK_FRAGMENT_CHAIN(stmt) and the pointer returned from add_ranges (stmt) for that chain. If you get a match, just generate a DW_AT_ranges entry using the range list already generated. -cary
