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List:       gcc-bugs
Subject:    [Bug target/82641] Unable to enable crc32 for a certain function with target attribute on ARM (aarch
From:       "arnd at linaro dot org" <gcc-bugzilla () gcc ! gnu ! org>
Date:       2018-01-31 19:41:46
Message-ID: bug-82641-4-7NtnAgrtHX () http ! gcc ! gnu ! org/bugzilla/
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82641

--- Comment #27 from Arnd Bergmann <arnd at linaro dot org> ---
(In reply to Richard Earnshaw from comment #26)
> (In reply to Arnd Bergmann from comment #25)
> 
> > or to apply more force and add the ".arch" to each inline
> > asm individually.
> 
> No, that would not be guaranteed to be supported: and you'd be lying to the
> compiler again.  At the end of each asm block the compiler *could* emit new
> .arch directive to forcibly reset the architecture to what IT thinks it
> should be.

That's fine though: we won't have any invalid instructions outside of the
inline asm, the whole point of setting .arch to a higher arch revision is to
make the inline asm work and avoid the build error from the assembler.=
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