[PATCH] clang: forward -no-integrated-as from the driver

[David Woodhouse]

On Fri, 2014-02-21 at 10:02 -0500, Rafael Espíndola wrote:
> 
> OK, this is going a bit off topic for this code review. What this
> patch does is disable the integrated assembler completely when
> -no-integrated-as is given. Both for -S and -c. I think you agree that
> that is the correct behavior.

Yes, it's a good start.

> Another possible change would be for the driver to make -S imply
> -no-integrated assembler. That is far more contentious and should have
> a code review of its own.

Agreed.

I think the idea of checking for missing constraints is a good one, but
unless you do make '-S' disable it completely, it's very important to
have a non-catastrophic failure mode.

If 'clang -S' can't parse the inline asm, then it should just silently
decline to check for missing constraints, or do the other cool things
you suggested. It should *not* break the build as seen in bug 18891.

I'd accept the failure mode being fixed, instead of completely disabling
the feature when -S is used.

-- 
dwmw2

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