[Bug target/93808] New: [9 Regression] [SH] Ruby crashes with 'Illegal Instruction' when compiled with gcc-9

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93808

            Bug ID: 93808
           Summary: [9 Regression] [SH] Ruby crashes with 'Illegal
                    Instruction' when compiled with gcc-9
           Product: gcc
           Version: 9.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glaubitz at physik dot fu-berlin.de
                CC: gcc-bugzilla at mkarcher dot dialup.fu-berlin.de,
                    jrtc27 at jrtc27 dot com, kkojima at gcc dot gnu.org,
                    olegendo at gcc dot gnu.org
  Target Milestone: ---
            Target: sh*-*-*

When compiling the ruby2.5 package on Debian/sh4 with gcc-9 instead of gcc-8,
the Ruby interpretor crashes with 'Illegal Instruction'.

root@tirpitz:..ruby2.5-ixXW4Q/ruby2.5-2.5.5> ./miniruby 
Illegal instruction
root@tirpitz:..ruby2.5-ixXW4Q/ruby2.5-2.5.5>

Printing the assembly with GDB shows that the IP seems to be pointing at data
instead of code(?):

(gdb) x/5i $pc
=> 0x5380c0 <coderange_scan+720>:       .word 0x0000
   0x5380c2 <coderange_scan+722>:       .word 0x0010
   0x5380c4 <coderange_scan+724>:       mov     r14,r2
   0x5380c6 <coderange_scan+726>:       bra     0x538094 <coderange_scan+676>
   0x5380c8 <coderange_scan+728>:       add     #-16,r2
(gdb)

I have not tested gcc-10 yet. Will do that now.