+Leszek Swirski <lesz...@google.com>

On Mon, Sep 18, 2023 at 8:07 PM ClearScript Developers <
clearscript...@gmail.com> wrote:

> Hello V8 folks!
>
> We're seeing this error in 11.8 Linux builds:
>
> ../../../src/maglev/maglev-ir.cc:2033:43: error: shifting a negative
> signed value is undefined [-Werror,-Wshift-negative-value]
>  2033 |                       ((kIsDoubleBit - 2) << (kTaggedSizeLog2 -
> 1)));
>       |                        ~~~~~~~~~~~~~~~~~~ ^
> ../../../src/maglev/maglev-ir.cc:2100:35: error: shifting a negative
> signed value is undefined [-Werror,-Wshift-negative-value]
>  2100 |               ((kIsDoubleBit - 2) << (kTaggedSizeLog2 - 1)));
>       |                ~~~~~~~~~~~~~~~~~~ ^
>
> It's easy enough to suppress via "-Wno-shift-negative-value", but is that
> safe?
>
> Thanks!
>
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