[Bug rtl-optimization/117360] [15 regression] ext-dce.cc:573:15: runtime error: shift exponent 127 is too large for 64-bit type 'long long unsigned int'

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117360

--- Comment #4 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #3)
> What's interesting is I did a bootstrap with ubsan a while back to chase
> down this stuff.  Could be something recently introduced or a path we didn't
> trigger before.  Regardless I'll case it down.
> 

I have bisected a recent UBSAN failure on this line when compiling pr114883.f90
to r15-4532-g36e91df7716d34 (Jeff Law: [committed][PR rtl-optimization/116488]
Fix SIGN_EXTEND source handling in ext-dce).