[PATCH] improve arm machine code (make -verify-machineinstrs happier)

[Matthias Braun]

I added testcases and resend in separate emails this minute. Here’s also a revised version of the optimizeSelect with a more verbose description:

ARM: optimizeSelect has to consider the previous register
 class

optimizeSelect folds (predicated) copy instructions, it must not ignore
the original register class of the operand when replacing the register
with the copies dest register.

Greetings
	Matthias




On Oct 3, 2013, at 3:54 PM, Renato Golin <renato.golin at linaro.org> wrote:

> On 3 October 2013 18:49, Quentin Colombet <qcolombet at apple.com> wrote:
> Could you add a test case for each case you are fixing (possibly in the same test file)?
> 
> Yes, that'd make a lot clearer on what kind of bug you're hitting and how you're fixing them.
> 
> I'd prefer a specific test on each patch, so that it gets bundled and helps future patch reviewers to understand the context.
> 
> Regarding the patches, without looking at an example, it's hard to understand what you're trying to fix. Still, the addOperand() patch seems straight-forward, and the tail call patch looks correct, though it'd be good to see it in action on a test. But it's not easy to spot what the optimizeSelect patch is trying to fix.
> 
> Also, in addition to a test on each patch, would be good to get better commit descriptions, especially on the optimizeSelect patch.
> 
> cheers,
> --renato

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