perf dwarf-aux: Better variable collection for insn tracking

perf dwarf-aux: Better variable collection for insn tracking

Utilizes the previous is_breg_access_indirect function to determine if
the register + offset stores the variable itself or the struct it points
to, save the information in die_var_type.is_reg_var_addr.

Since we are storing the real types in the stack state, we need to do a
type dereference when is_reg_var_addr is set to false for stack/frame
registers.

For other gp registers, skip the variable when the register is a pointer
to the type. If we want to accept these variables, we might also utilize
is_reg_var_addr in a different way, we need to mark that register as a
pointer to the type.

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Zecheng Li <zecheng@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xu Liu <xliuprof@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>