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2016-02-22T14:15:18Z stassats: found a way to avoid loading constants multiple times in (defun x () (bar 341 341) 1)
2016-02-22T14:15:49Z stassats: but not in a generic way
2016-02-22T14:16:06Z stassats: perhaps i can add some ir2optimization pass
2016-02-22T14:17:08Z stassats: this is would be similar to copyprop
2016-02-22T14:17:38Z stassats: but working just within a basic block should be good enough of a start
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2016-02-22T14:40:58Z stassats: doing that in generate-code seems to work well
2016-02-22T14:51:54Z scymtym: is there non-determinism in an assemble->disassemble roundtrip? because this https://ci.cor-lab.org/job/sbcl-master/1490/featureset=8,label=ubuntu_trusty_64bit/consoleFull (search for "UNEXPECTED-FAILURE :ASSEMBLE-MOVTI-INSTRUCTION") failed once for a single platform and configuration and apparently never since
2016-02-22T14:52:23Z scymtym: and only when running tests in interpreted mode
2016-02-22T14:52:56Z stassats: it tries to disassemble zeros
2016-02-22T14:53:51Z scymtym: so either the assembler emitted zeros or the disassembler is broken?
2016-02-22T14:54:19Z stassats: or it disassembles the wrong thing?
2016-02-22T14:54:44Z stassats: test-assemble doesn't seem to compile the function
2016-02-22T14:55:06Z stassats: oh, misread what it does
2016-02-22T15:00:12Z stassats: but the disassembler is working, evidently
2016-02-22T15:00:37Z stassats: scymtym: i would look into with-pinned-objects and interpreter mode
2016-02-22T15:00:54Z stassats: though, this being x86, shouldn't matter all that much
2016-02-22T15:06:47Z stassats: but that would perfectly explain both non-determinism and the use of the interpreter
2016-02-22T15:26:57Z scymtym: stassats: thanks. i won't have time to look into this (or anything for that matter) until the weekend. i will just forward this conversation to dougk, if that's fine with you
2016-02-22T15:27:19Z stassats: i won't be looking at it either
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2016-02-22T16:20:41Z Xof: I have suspicions about interpreters and with-pinned-objects too
2016-02-22T16:21:05Z Xof: I have a branch somewhere with the test suite running in eval mode, and things with with-pinned-objects seem to fail
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2016-02-22T16:24:56Z stassats: fiddling with constant loading, something keeps overwriting the registers
2016-02-22T16:26:36Z stassats: oh, i'm testing tns for equals, i need to test tn locations
2016-02-22T16:28:17Z scymtym: Xof: i added an --evaluator-mode commandline option to run-tests.sh some time ago. does your branch do something different?
2016-02-22T16:28:24Z stassats: drat, no wonder (delete tn loaded-constants :key #'cdr :key #'location=) doesn't work
2016-02-22T16:30:30Z stassats: would be fair to issue a style warning for this? and my arg-mismatch doesn't catch this either, since the second :key is ignored
2016-02-22T16:31:43Z stassats: finally, a successful build, twentieth time's a charm
2016-02-22T16:34:13Z stassats: so, i got (foo nil nil) => MOV EDX, 537919511   MOV RDI, RDX
2016-02-22T16:34:25Z stassats: instead of MOV EDX, 537919511  MOV EDI, 537919511
2016-02-22T16:34:33Z stassats: saves two bytes, yay
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2016-02-22T16:36:12Z scymtym: i can't see a downside of issuing a style-warning for a repeated keyword argument for functions in the cl package
2016-02-22T16:36:28Z stassats: scymtym: some macros can expand into that
2016-02-22T16:37:06Z stassats: loading 'X twice saves 4 bytes
2016-02-22T16:37:24Z scymtym: isn't that somewhat similar to expanding into code with unused variables or functions?
2016-02-22T16:37:48Z stassats: well, that's prescribed by the standard to be warned
2016-02-22T16:37:55Z stassats: and there is IGNORABLE
2016-02-22T16:38:09Z scymtym: true
2016-02-22T16:38:45Z stassats: i wish code could be distinguished from macro-expanded code
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2016-02-22T16:39:24Z stassats: hm, what i'm doing looks like a peep-hole optimizer
2016-02-22T16:40:20Z scymtym: i think the composable code-walking stuff could be used for that. i haven't tried that, though
2016-02-22T16:40:33Z stassats: a primitive one with just one task, but i can see how to extended it further
2016-02-22T16:42:28Z stassats: and not exactly at the instruction level
2016-02-22T16:48:00Z stassats: (delete x y :key #'car :key 10) does warn
2016-02-22T16:48:43Z stassats: so, at least i can warn about argument mismatch
2016-02-22T17:18:28Z stassats: VOPs writing to unused results is annoying
2016-02-22T17:20:07Z stassats: defeats some stuff in my peep-hole optimizer
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2016-02-22T18:28:07Z stassats: sigh, works fine on x86-64, fails on arm64, can't figure out where
2016-02-22T19:13:13Z stassats: a sideways approach, build with constant-coalescing disabled, save a core with it enabled, run tests
2016-02-22T19:22:32Z christoph_debian: hm. seems the pdfmanual of 1.3.1 fails to compile with texinfo 6.1.0
2016-02-22T19:22:34Z christoph_debian: -> .texinfo:3: TeX capacity exceeded, sorry [text input levels=15].
2016-02-22T19:23:22Z stassats: sorry
2016-02-22T19:24:27Z christoph_debian: https://pbot.rmdir.de/SA5a2uKfFRztaEDF9vJ-YQ
2016-02-22T19:24:28Z stassats: don't think there was any changes to the manual
2016-02-22T19:24:55Z christoph_debian: ja the change was to texinfo
2016-02-22T19:24:56Z christoph_debian: ;-)
2016-02-22T19:25:07Z christoph_debian: with 6.0.0 it works, with 6.1.0 it doesn't
2016-02-22T19:27:25Z christoph_debian: hm I might actually have some luck with pinging texinfo folks, we'll see
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2016-02-22T19:32:00Z stassats: damn it, no tests failed
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2016-02-22T19:51:44Z stassats: ppc fails too, but the failure is more clear
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2016-02-22T20:31:26Z stassats: no luck on ppc either
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2016-02-22T21:02:33Z monkey_: hi hih hi
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2016-02-22T22:22:10Z stassats: and after some changes the problem disappeared, no idea how or why
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2016-02-22T22:28:35Z stassats: but on arm64 only, still broken on ppc
2016-02-22T22:28:37Z stassats: that's annoying
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