[Bug middle-end/85344] Constant constraint check sign extends unsigned constant input operands
thopre01 at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Apr 11 12:28:00 GMT 2018
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85344
Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #3)
> More worrying is that this code compiles without error when it should error
> out:
>
> void
> foo (void)
> {
> __asm( "%0" :: "J" ((unsigned char) 0x80));
> }
In which case we end up with #-128 in the assembly which is not what the user
wrote. Thus adding wrong-code tag.
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