[LLVMdev] Getting rid of tabs in LLVM's assembly output?

Owen Anderson resistor at mac.com
Tue Dec 18 15:21:54 PST 2012

On Dec 18, 2012, at 2:07 PM, Chandler Carruth <chandlerc at google.com> wrote:

> On Tue, Dec 18, 2012 at 1:13 PM, Eli Bendersky <eliben at google.com> wrote:
> On Tue, Dec 18, 2012 at 1:09 PM, Craig Topper <craig.topper at gmail.com> wrote:
> > But its pretty easy to change the tabstop within the editor to make it
> > readable.
> >
> True, in this case... The output is not trying to be intelligent in
> the general case, just spitting out tabs. I agree that to replace
> this, however, it would be best to look at some smart column-padded
> formatting than use a constant tab -> N spaces replacement. I'll see
> if this is something I can get to.
> Maybe it's naive, but I would expect it to be easy for each backend to expose a constant N which is the length of the longest mnemonic, and then for the printer to pad to N+1 or N+2….

That would probably work for X86, but other targets (ARM in particular) often have operands which are printed/parsed as suffices on the mnemonic itself.  Because of these, the backend does not statically know the longest potential string-of-stuff-before-the-tab.


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