[llvm-bugs] [Bug 45191] clang generates incorrect X86-64 code optimization for integer assignment-comparison

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Mar 13 02:06:43 PDT 2020


https://bugs.llvm.org/show_bug.cgi?id=45191

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

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

--- Comment #3 from Roman Lebedev <lebedev.ri at gmail.com> ---
https://godbolt.org/z/-jXo5M

example.cpp:14:25: runtime error: signed integer overflow: 2147483647 + 16
cannot be represented in type 'int'

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior example.cpp:14:25 in 

example.cpp:12:27: runtime error: signed integer overflow: -2147483633 -
2147483647 cannot be represented in type 'int'

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior example.cpp:12:27 in 

.m = 16

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