minifier produces incorrect constant value on large floating-point value

[levi-nz]

Describe the bug

Running 1.7976931348623157e+308 << 1 in NodeJS v20.12.2 and in browser (Firefox) returns 0 but SWC minifier transforms this into -2.

For reference, 1.7976931348623157e+308 is Number.MAX_VALUE in JavaScript and f64::MAX in Rust.

Input code

1.7976931348623157e+308 << 1

Config

No response

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.6.7&code=H4sIAAAAAAAAA0vTMNQztzQ3szQ2NDaxMDMyNjQ1T9U2NrBQsLFRMNTkAgCxoDjzIAAAAA%3D%3D&config=H4sIAAAAAAAAA32UO3LjMAyG%2B5zCozrFjostcoDtcgYOTYIyvXxoCNCxJuO7L0TJj40hdRI%2B%2FAAJgPh%2B2%2B26E5ruY%2FfNn%2Fwz6IJQ7v9swTGRvrClAxM1muIH6t5v9IQTcjogNNN1Jh3p0gM1Fe5%2F7feLogs5I9wUiy365N34nNPkOBRAfLKxlUPWCInwf%2F3CSv6aAJX6bD%2FkHECnDaI0Kp8IeihSYJND0AOCOusiRJlOqovHLKWYYCWwaih5EHmynnxOnPOVWtBWmWxBQL6AIX8GSca5WJaQryfcp2ELh9r3rc8%2F1HDWoWoScsKltYRPK0Q9Zo%2BkXE1SCWe4UoMZLsX9qfROFaBa0qvulH1a6clfAK5A0IhJR5DiNg%2FH87SmdptKnxyPLI0C5%2FmWbpmg56Iq751Q2akyUMhL3Sxgq4GpskY6zoJXyofeggLneFaE0PjlyRylpDQOkJ0AuL%2FaSVM1A3V%2FhSt8ehAb%2BA%2FfkuQBWzyipuM6xTEecthIEIGO2W44cCsor%2BPCW%2BIyrPOaLPBogBVdKjbwugT4AVBWoe3Ll9ng58ERVR%2Fy4bEmFofrfQ9HnfrHe59X8dvi0MVsa4PLkp%2F6O6%2Fm393D6baF7wfvPH7elC3p9R%2BoYzQdMAYAAA%3D%3D

SWC Info output

No response

Expected behavior

Should be transformed to f(0)

Actual behavior

Transforms to f(-2)

Version

1.6.7

Additional context

No response

[levi-nz]

I believe the problem is js_convert_double_to_bits not returning 0 if the value exceeds 32-bit integer limit as defined in ToInt32

[levi-nz]

Not sure if we need to use overflowing_* here for shifting

[kdy1]

Related:

• https://tc39.es/ecma262/#sec-numeric-types-number-leftShift
• https://tc39.es/ecma262/#sec-numeric-types-number-signedRightShift
• https://tc39.es/ecma262/#sec-numeric-types-number-unsignedRightShift

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.