[LLVMdev] Integrated ARM assembler

[Renato Golin]

Hi Greg,


1) The assembly parser does not parse the ARM-ELF directives.
>

Is this for inline asm?



> 2) The Exception Handling ABI does not appear to be supported.
>

AFAIK, this is not exclusive to the integrated assembler. EHABI doesn't
work properly with anything. Even the ASM tables generated don't make sense
on slightly more complicated cases. But I haven't tested recently to know.



>  Try this:
> $ echo "void a(){}" | clang -target arm-none-linux-gnueabi -mllvm
> -arm-enable-ehabi -integrated-as -c -xc -
> Not implemented yet
>

Seems to work for me... ;)


3) There are -Wa options that the integrated assembler does not recognize.
>

That's not really a problem and will *always* be that way. It doesn't make
sense for Clang/LLVM to implement every GCC flag as soon as GCC supports it.

I can see a few issues, but none that wouldn't make sense to turn it upside
down and require -no-integrated-as when the user needs special features
from GAS...

Otherwise, it's likely that it'll never be good enough to be enabled by
default and issues will never be fixed on it... :/

cheers,
--renato
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