[Bug debug/58315] [4.8/4.9/5 Regression] Excessive memory use with -g

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58315

--- Comment #15 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
And annoyingly, even stuff as repetitive like this (notice, the same exact `di'
register, no offset or anything):

(note 11470254 74094 11470255 6371 (var_location this(0x7fffeeac8bd0)  (reg:DI
5 di [17204])) NO
TE_INSN_VAR_LOCATION)
(note 11470255 11470254 11470256 6371 (var_location this(0x7fffe72233f0) 
(reg:DI 5 di [17204]))
 NOTE_INSN_VAR_LOCATION)
(note 11470256 11470255 11470257 6371 (var_location this(0x7fffe7223510) 
(reg:DI 5 di [17204]))
 NOTE_INSN_VAR_LOCATION)
(note 11470257 11470256 11470258 6371 (var_location this(0x7fffe7223a20) 
(reg:DI 5 di [17204]))
 NOTE_INSN_VAR_LOCATION)
(note 11470258 11470257 11470259 6371 (var_location this(0x7fffe7223ab0) 
(reg:DI 5 di [17204]))
 NOTE_INSN_VAR_LOCATION)
...
...
1300 more of these.