[Bug rtl-optimization/98863] WRF with LTO consumes a lot of memory in REE, CPROP, PRE and LRA passes

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98863

--- Comment #22 from Martin Liška <marxin at gcc dot gnu.org> ---
There are other smaller spikes I can see:

663s: current pass = cse1 (259)
{'ltrans': {'memory': 1.5744667053222656, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.5744667053222656, 'cpu': 6.24375}}
{'ltrans': {'memory': 2.4257125854492188, 'cpu': 6.30625}}
{'ltrans': {'memory': 3.3943252563476562, 'cpu': 6.24375}}
{'ltrans': {'memory': 4.317256927490234, 'cpu': 6.24375}}
{'ltrans': {'memory': 5.229209899902344, 'cpu': 6.24375}}
{'ltrans': {'memory': 6.062725067138672, 'cpu': 6.24375}}
{'ltrans': {'memory': 6.596076965332031, 'cpu': 6.24375}}
{'ltrans': {'memory': 6.596076965332031, 'cpu': 6.24375}}
{'ltrans': {'memory': 6.596076965332031, 'cpu': 6.30625}}
...
1020s: current pass = cprop (277)
{'ltrans': {'memory': 1.7144355773925781, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7144355773925781, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7144355773925781, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7144355773925781, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7144355773925781, 'cpu': 6.30625}}
{'ltrans': {'memory': 2.1491661071777344, 'cpu': 6.24375}}
{'ltrans': {'memory': 4.545764923095703, 'cpu': 6.24375}}
{'ltrans': {'memory': 5.894496917724609, 'cpu': 6.24375}}
{'ltrans': {'memory': 6.246974945068359, 'cpu': 6.30625}}
{'ltrans': {'memory': 6.279705047607422, 'cpu': 6.1875}}
...
1055s: current pass = dse1 (280)
{'ltrans': {'memory': 1.7354316711425781, 'cpu': 6.3125}}
{'ltrans': {'memory': 1.7354316711425781, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7354316711425781, 'cpu': 6.25}}
{'ltrans': {'memory': 1.7354316711425781, 'cpu': 6.25}}
{'ltrans': {'memory': 1.7354316711425781, 'cpu': 6.25}}
{'ltrans': {'memory': 1.9871711730957031, 'cpu': 6.25}}
{'ltrans': {'memory': 2.9451065063476562, 'cpu': 6.25}}
{'ltrans': {'memory': 3.904376983642578, 'cpu': 6.1875}}
{'ltrans': {'memory': 4.7339630126953125, 'cpu': 6.30625}}
{'ltrans': {'memory': 5.655551910400391, 'cpu': 6.1875}}
{'ltrans': {'memory': 6.43743896484375, 'cpu': 6.3125}}
{'ltrans': {'memory': 6.7246246337890625, 'cpu': 6.25}}
{'ltrans': {'memory': 6.7246246337890625, 'cpu': 6.25}}
{'ltrans': {'memory': 6.488391876220703, 'cpu': 6.24375}}
...
1096s: current pass = combine (285)
{'ltrans': {'memory': 1.7870025634765625, 'cpu': 6.24375}}
 {GC released 6144k madv_dontneed 2460k} {GC 421M -> 294M}{'ltrans': {'memory':
1.7791824340820312, 'cpu': 6.30625}}
{'ltrans': {'memory': 1.7791824340820312, 'cpu': 6.1875}}
{'ltrans': {'memory': 1.7791824340820312, 'cpu': 6.30625}}
{'ltrans': {'memory': 1.7791824340820312, 'cpu': 6.25}}
{'ltrans': {'memory': 1.7791824340820312, 'cpu': 6.24375}}
{'ltrans': {'memory': 1.7791824340820312, 'cpu': 6.24375}}
{'ltrans': {'memory': 3.4982643127441406, 'cpu': 6.24375}}
{'ltrans': {'memory': 5.336437225341797, 'cpu': 6.18125}}
{'ltrans': {'memory': 5.823863983154297, 'cpu': 6.30625}}
{'ltrans': {'memory': 5.903423309326172, 'cpu': 6.24375}}
...