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PR debug/64817 * cfgexpand.c (deep_ter_debug_map): New variable. (avoid_deep_ter_for_debug): New function. (expand_debug_expr): If TERed SSA_NAME is in deep_ter_debug_map, use the corresponding DEBUG_EXPR_DECL instead of trying to expand SSA_NAME's def stmt. (expand_debug_locations): When expanding debug bind of a DEBUG_EXPR_DECL to corresponding SSA_NAME, temporarily remove the DEBUG_EXPR_DECL from deep_ter_debug_map's value. (pass_expand::execute): Call avoid_deep_ter_for_debug on all debug bind stmts. Delete deep_ter_debug_map after expand_debug_location if non-NULL and clear it. * gcc.dg/pr64817-1.c: New test. * gcc.dg/pr64817-2.c: New test. From-SVN: r220320
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