[Bug target/126191] [pdp11] QImode arithmetic right shift by constants 4..7 zero-extends the operand, losing the sign

[mikpelinux at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126191

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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--- Comment #2 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Created attachment 65091
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65091&action=edit
standalone executable test case

I can reproduce the wrong code with gcc-13 and 14, and it's cured by the
proposed patch.

However, since the ext-dce fix in r15-2196-g88d16194d0c8a6 it no longer
reproduces.