[LLVMdev] .align 0

[Jim Grosbach]

Apple’s assembler does use power-of-two for .align. I believe binutils does as well. I suspect the header file comment is in error and what’s actually happening is that the section in question has a minimum alignment on the system(s) in question, and so it just looks like it’s redundant. That is, I doubt we need to do anything here.

-Jim

On Oct 28, 2013, at 11:54 AM, Renato Golin <renato.golin at linaro.org> wrote:

> Hi Sid,
> 
> It seems Apple's assembler used to treat .align 0 differently:
> 
> https://developer.apple.com/library/mac/documentation/developertools/Reference/Assembler/040-Assembler_Directives/asm_directives.html
> 
> If this is still the case, than we should have an option for what to do in this case, maybe defaulting based on the triple?
> 
> cheers,
> --renato
> 
> 
> On 28 October 2013 17:53, Sid Manning <sidneym at codeaurora.org> wrote:
> 
> I have several assembly files in a testsuite that use, ".align 0".  I found a reference to, ".align 0" in ARM's elf.h that says .align 0 is redundant and gas treats this as align 2.
> 
> Should the llvm-mc follow this convention?
> 
> -- 
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