re PR tree-optimization/37709 (inlining causes explosion in debug info)
PR tree-optimization/37709 * tree.c (block_ultimate_origin): Move here from dwarf2out. * tree.h (block_ultimate_origin): Declare. * dwarf2out.c (block_ultimate_origin): Move to tree.c * tree-ssa-live.c (remove_unused_scope_block_p): Eliminate blocks containig no instructions nor live variables nor nested blocks. (dump_scope_block): New function. (remove_unused_locals): Enable removal of dead blocks by default; enable dumping at TDF_DETAILS. From-SVN: r144381
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