[Issue 21490] Front end detection logic for SSE4.1 is failing when using -O

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21490

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |SIMD

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