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Was revealing a critical bug in VM universe handling introduced in 8.5.
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The renaming is internal only. I believe the name reloc is legacy and
a bit confusing now that the structure contains a full compilation
environment.
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We now have only two notions of environments in the kernel: env and
safe_env.
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We also make the code of [compact] in kernel/univ.ml a bit clearer.
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Recent commits introduced global flags, but these should be
module-specific so relocating.
Global flags are deprecated, and for 8.9 `Lib.Flags` will be reduced
to the truly global stuff.
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We simply treat them as as an application of an atom to its instance,
and in the decompilation phase we reconstruct the instance from the stack.
This grants wish BZ#5659.
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This simplifies the representation of values, and brings it closer to
the ones of the native compiler.
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This intermediate representation serves two purposes:
1- It is a preliminary step for primitive machine integers, as iterators
will be compiled to Clambda.
2- It makes the VM compilation passes closer to the ones of
native_compute. Once we unifiy the representation of values, we should
be able to factorize the lambda-code generation between the two
compilers, as well as the reification code.
This code was written by Benjamin Grégoire and myself.
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This bug was present since the first patch adding universe polymorphism
handling in the VM (Coq 8.5). Note that unsoundness can probably be
observed even without universe polymorphism.
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We do up to `Term` which is the main bulk of the changes.
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This will allow to merge back `Names` with `API.Names`
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The bytecode interpreter ensures that the stack space available at some
points is above a static threshold. However, arbitrary large stack space
can be needed between two check points, leading to segmentation faults
in some cases.
We track the use of stack space at compilation time and add
an instruction to ensure greater stack capacity when required. This is
inspired from OCaml's PR#339 and PR#7168.
Patch written with Benjamin Grégoire.
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This fixes #3450 and probably provides a huge speed-up to many instances.
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Suggested by @ppedrot
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As noted by @ppedrot, the first is redundant. The patch is basically a renaming.
We didn't make the component optional yet, but this could happen in a
future patch.
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module)
For the moment, there is an Error module in compilers-lib/ocamlbytecomp.cm(x)a
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On the user side, coqtop and coqc take a list of warning names or categories
after -w. No prefix means activate the warning, a "-" prefix means deactivate
it, and "+" means turn the warning into an error. Special categories include
"all", and "default" which contains the warnings enabled by default.
We also provide a vernacular Set Warnings which takes the same flags as argument.
Note that coqc now prints warnings.
The name and category of a warning are printed with the warning itself.
On the developer side, Feedback.msg_warning is still accessible, but the
recommended way to print a warning is in two steps:
1) create it by:
let warn_my_warning =
CWarnings.create ~name:"my-warning" ~category:"my-category"
(fun args -> Pp.strbrk ...)
2) print it by:
warn_my_warning args
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This is a first step to relay location info in an uniform way, as needed
by warnings and other mechanisms.
The location info remains unused for now, but coqtop printing could take
advantage of it if so wished.
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This patch splits pretty printing representation from IO operations.
- `Pp` is kept in charge of the abstract pretty printing representation.
- The `Feedback` module provides interface for doing printing IO.
The patch continues work initiated for 8.5 and has the following effects:
- The following functions in `Pp`: `pp`, `ppnl`, `pperr`, `pperrnl`,
`pperr_flush`, `pp_flush`, `flush_all`, `msg`, `msgnl`, `msgerr`,
`msgerrnl`, `message` are removed. `Feedback.msg_*` functions must be
used instead.
- Feedback provides different backends to handle output, currently,
`stdout`, `emacs` and CoqIDE backends are provided.
- Clients cannot specify flush policy anymore, thus `pp_flush` et al are
gone.
- `Feedback.feedback` takes an `edit_or_state_id` instead of the old
mix.
Lightly tested: Test-suite passes, Proof General and CoqIDE seem to work.
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- Universes are now represented in the VM by a structured constant containing the
global levels. This constant is applied to local level variables if any.
- When reading back a universe, we perform the union of these levels and return
a [Vsort].
- Fixed a bug: structured constants could contain local universe variables in
constructor arguments, which has to be prevented.
Was showing up for instance when evaluating [cons _ list (nil _)] with
a polymorphic [list] type.
- Fixed a bug: polymorphic inductive types can have an empty stack.
Was showing up when evaluating [bool] with a polymorphic [bool] type.
- Made a few cosmetic changes.
Patch written with Benjamin Grégoire.
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polymorphic definitions.
- This implementation passes universes in separate arguments and does not
eagerly instanitate polymorphic definitions.
- This means that it pays no cost on monomorphic definitions.
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I'm pushing this patch now because the previous treatment of such projections
in the VM was already unsound. It should however be carefully reviewed.
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Prints the VM bytecode produced by compilation of a constant or a call to
vm_compute.
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for which there corresponding tag are greater than max_variant_tag.
The code is a merge with the patch proposed by Bruno on
github barras/coq
commit/504c753d7bb104ff4453fa0ede21c870ae2bb00c
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and 8388851 non-constant constructor.
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change the representation of inductive constructor
when there is too many non constant constructors in the inductive type
Conflicts:
kernel/cbytegen.ml
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more than 245 constructors (unsupported by OCaml's runtime).
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match predicates for vm_compute and compile polymorphic definitions
to constant code. Add univscompute test-suite file testing VM
computations in presence of polymorphic universes.
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definitions. Instead of failing with an anomaly when trying to do
conversion or computation with the vm's, consider polymorphic constants
as being opaque and keep instances around. This way the code is still
correct but (obviously) incomplete for polymorphic definitions and we
avoid introducing an anomaly. The patch does nothing clever, it only
keeps around instances with constants/inductives and compile constant
bodies only for non-polymorphic definitions.
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Pierre-Marie Pédrot
Maxime Dénès
Gaëtan Gilbert
Emilio Jesus Gallego Arias
Théo Zimmermann
Amin Timany
Pierre Letouzey
Gregory Malecha
Hugo Herbelin
Benjamin Gregoire
Matthieu Sozeau
Guillaume Melquiond
Matthieu Sozeau