[llvm-bugs] [Bug 52100] clang incorrectly optimize integer conversion from int to unsigned long long with -O2 on x86_64

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=52100

Roman Lebedev <lebedev.ri at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lebedev.ri at gmail.com
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Roman Lebedev <lebedev.ri at gmail.com> ---
You didn't provide `initialize_site_prn_from_seed_opt()`,
but if i delete a call to it i get: https://godbolt.org/z/eKG3r4sK5

/app/example.c:23:31: runtime error: signed integer overflow: 69607 * 5682304
cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:23:31 in 
/app/example.c:25:31: runtime error: signed integer overflow: 69607 * 391155641
cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:25:31 in 
/app/example.c:27:31: runtime error: signed integer overflow: 69607 *
1373026088 cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:27:31 in 
/app/example.c:29:31: runtime error: signed integer overflow: 69607 * 614649169
cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:29:31 in 
/app/example.c:31:31: runtime error: signed integer overflow: 69607 *
1715483472 cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:31:31 in 
/app/example.c:33:31: runtime error: signed integer overflow: 69607 * 977284457
cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:33:31 in 
/app/example.c:35:31: runtime error: signed integer overflow: 69607 *
2147176696 cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:35:31 in 
/app/example.c:37:31: runtime error: signed integer overflow: 69607 *
-2038642687 cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /app/example.c:37:31 in 

I suspect it's the same way with `initialize_site_prn_from_seed_opt()`.

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