[Bug c/97969] [9/10/11 Regression][ARM/Thumb] Certain combo of codegen options leads to compilation infinite loop with growing memory use

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97969

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |arm
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |10.2.1, 11.0, 9.3.1
                 CC|                            |ktkachov at gcc dot gnu.org
      Known to work|                            |8.4.1
   Last reconfirmed|                            |2020-11-24
            Summary|[ARM/Thumb] Certain combo   |[9/10/11
                   |of codegen options leads to |Regression][ARM/Thumb]
                   |compilation infinite loop   |Certain combo of codegen
                   |with growing memory use     |options leads to
                   |                            |compilation infinite loop
                   |                            |with growing memory use
           Keywords|                            |memory-hog
     Ever confirmed|0                           |1

--- Comment #3 from ktkachov at gcc dot gnu.org ---
Confirmed on the 9, 10, 11 branches. On GCC 8 it completes successfully.
Doesn't reproduce on aarch64, looks like it needs all of -mthumb
-fno-omit-frame-pointer -Os.