[Issue 17098] Takes hours to -O compile then fails with Internal error: backend/cgreg.c 405

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17098

--- Comment #7 from Walter Bright <bugzilla at digitalmars.com> ---
Definitely a problem with integer overflowing Sweight in cgreg.d

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