[Bug target/71779] isl miscompiled with -mabi=ilp32

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71779

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |6.2
      Known to fail|                            |6.1.1, 7.0