[LLVMdev] ARM Qualification

Andrew Trick atrick at apple.com
Thu Oct 13 15:56:55 PDT 2011

On Oct 11, 2011, at 4:48 PM, Joerg Sonnenberger wrote:

> On Tue, Oct 11, 2011 at 06:20:17PM -0500, David A. Greene wrote:
>> This seems excessive and unrealistic.  We're never going to come up with
>> a testsuite that satisfies everyone's needs and doing so could well be
>> counter-productive.  If no one can commit anything unless it passes
>> every test (including performance) for every target under multiple
>> option combinations, nothing will ever get committed.  Especially if no
>> one has access to systems to debug on.
> As I see it, there are regulary commits that introduce performance and
> code size regressions. There doesn't seem to be any formal testing in
> place. Not for X86, not for ARM. Hunting down regressions like
> enable-iv-rewrite=false, which added 130 Bytes to a piece of code that
> can only be 8KB large in total is painful and slow. From my point of
> view, the only way to ensure that the compiler does a good job is
> providing a test infrastructure to monitor this. This is about forcing
> pre-commit test, it is about ensuring that the testing is done at all
> in a timely manner.

The change you refer to was not intended to improve performance at the expense of code size.
Has this been fixed on trunk, or did you discover the workaround and move on without filing a bug?


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