[Bug target/71680] [7 Regression] ICE: Max. number of generated reload insns per insn is achieved (90) w/ -Os -mlra

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71680

--- Comment #13 from Alan Modra <amodra at gmail dot com> ---
The e500 issue is quite different, and is not fixed by my lra patch.  From the
lra dump,

      Creating newreg=436, assigning class NO_REGS to save r436
  536: r192:SI=0x1
      REG_EQUAL 0x1
    Add reg<-save after:
  621: r362:SI#0=r436:DF

  184: NOTE_INSN_BASIC_BLOCK 21
    Add save<-reg after:
  620: r436:DF=r362:SI#0

So r362 is being saved for some reason, then later:

  Reassigning non-reload pseudos
           Assign 66 to r362 (freq=4000)

so r362 is finding its way into ctr.