The other slight difficulty is that because I'm looking at the direct
assembly langauge, I'm not always sure what Pascal code produces said
assembly language. Granted that's because I tend to dump the assembly
files without the -al option, and I only tend to use the -ar option if
there's some kind of register tracking problem.
Gareth aka. Kit
On 09/01/2022 13:38, J. Gareth Moreton via fpc-devel wrote:
It's probably a good idea, yes. Normally the optimisations I
implement are due to me spotting something in the RTL or compiler
disassembly while optimising something else, so the tests per se are
in those units. Dedicated tests, like my recently added POPCNT tests,
are a good idea even if the set-up is quite uncommon (e.g. it's rare
that one would check, say, PopCnt(X) = 0 (or <> 0) because checking X
directly gives you the exact same result - in that particular case, I
added it because it was as simple as adding a couple of labels to a
case block.
How should we start with making these tests?
Gareth aka. Kit
On 09/01/2022 11:14, Florian Klämpfl via fpc-devel wrote:
Am 09.01.2022 um 08:09 schrieb J. Gareth Moreton via fpc-devel
<fpc-devel@lists.freepascal.org>:
Some people requested a Patreon post as to my plans for 2022 with
FPC, so I was happy to oblige. Plans may change a bit though
depending on what happens in life and also what Florian's own vision
is with the compiler, but this is the gist of it:
https://www.patreon.com/posts/60922821
One thing we should think about: the current optimizations being
added get more and more rare so they are often not tested anymore by
the existing regression tests. So maybe we should think about a
dedicated facility for assembler optimization testing.
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