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Adapting the new mppa-RTLpathSE passes into the new Compiler.vexpand
framework
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mppa-work-upstream-merge
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debug/DwarfPrinter.mli: unused functor parameter trigger warning 69,
replace by non-dependent functor type.
Makefile.extr: turn warning 69 (unused functor parameter) off
for extracted code
configure: accept OCaml versions above 4.09
configure: update messages for unsupported versions of OCaml and Coq
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Since Menhir version 20200123, we need to link with menhirLib.cmxa
instead of menhirLib.cmx.
This commit chooses automatically the file to link with:
menhirLib.cmxa if it exists in the menhirLib installation directory,
menhirLib.cmx otherwise.
To reliably find the installation directory, configure was changed
to record the menhirLib directory in Makefile.config, variable MENHIR_DIR,
instead of a pre-cooked command-line option MENHIR_INCLUDES.
Makefile.extr was adapted accordingly.
Fixes: #329
Closes: #330
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mppa-work-upstream-merge
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What's new:
1. A rewrite of the Coq interpreter of Menhir automaton, with
dependent types removing the need for runtime checks for the
well-formedness of the LR stack. This seem to cause some speedup on
the parsing time (~10% for lexing + parsing).
2. Thanks to 1., it is now possible to avoid the use of int31 for
comparing symbols: Since this is only used for validation,
positives are enough.
3. Speedup of Validation: on my machine, the time needed for compiling
Parser.v goes from about 2 minutes to about 1 minute. This seem to
be related to a performance bug in the completeness validator and
to the use of positive instead of int31.
3. Menhir now generates a dedicated inductive type for
(semantic-value-carrying) tokens (in addition to the already
existing inductive type for (non-semantic-value-carrying)
terminals. The end result is that the OCaml support code for the
parser no longer contain calls to Obj.magic. The bad side of this
change is that the formal specification of the parser is perhaps
harder to read.
4. The parser and its library are now free of axioms (I used to use
axiom K and proof irrelevance for easing proofs involving dependent
types).
5. Use of a dedicated custom negative coinductive type for the input
stream of tokens, instead of Coq stdlib's `Stream`. `Stream` is a
positive coinductive type, which are now deprecated by Coq.
6. The fuel of the parser is now specified using its logarithm instead
of its actual value. This makes it possible to give large fuel
values instead of using the `let rec fuel = S fuel` hack.
7. Some refactoring in the lexer, the parser and the Cabs syntax tree.
The corresponding changes in Menhir have been released as part of
version 20190626. The `MenhirLib` directory is identical to the
content of the `src` directory of the corresponding `coq-menhirlib`
opam package except that:
- In order to try to make CompCert compatible with several Menhir
versions without updates, we do not check the version of menhir
is compatible with the version of coq-menhirlib. Hence the
`Version.v` file is not present in CompCert's copy.
- Build-system related files have been removed.
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CompCert does not support OCaml version <= 4.00
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The new Makefile variable LINK_OPT can be used to specify
additional linker flags for different operating systems, like
linking with setargv.obj under windows.
Bug 20871
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The functions expandargv and writeargv resemble the functions from
the libiberity that are used by the gnu tools. Additionaly a new
configuration is added in order to determine which kind of response
files are supported for calls to other tools.
Bug 18308
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Most of the code can be String.uppercase usages can either be
replaced by a more specialized version of coqstring_of_camlstring
(which is also slightly more effecient) or by specialized checks
that reject wrong code earlier.
Bug 19187
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Clightgen and CompCert share the code for preprocessing as well as
parsing C files. The code as well as command line switches is moved
in the new module Frontend.
Bug 18768
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GNU make under windows seems to have a restriction to 8192 characters
for commandline arguments. The dependency generation of compcert is
too large. Thus we split it into two steps.
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The code was mostly there for documentation effort. So warning
27 is deactivated again.
Bug 18349
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Since the menhir version we use requires ocaml>4.02 we can also
upgrade the required ocaml version to >4.02 and remove the
deprecate String functions.
Also we now activate all warnings except for 4,9 und 27 for regular
code plus a bunch of warnings for the generated code. 4 and 9 are
not really usefull and 27 is deactivated since until the usage
string is printed in a way that requires no newline.
Bug 18394.
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Instead of using = to set the COMPFLAGS use += which allows it to
specify custom compiler flags in for example the Makefile.config.
Also remove *.cmt(i) files and add them to the .gitignore file.
Bug 17742
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Don't pass $(MENHIR_INCLUDES) to ocamldep.
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Conflicts:
Makefile.extr
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Conflicts:
Makefile.extr
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This requires the development version of Menhir, to be released soon.
In summary:
handcrafted.messages is new.
It contains a mapping of erroneous sentences to error messages,
together with a lot of comments.
Makefile.extr is new.
It contains a rule to generate cparser/pre_parser_messages.ml
based on this mapping.
cparser/ErrorReports.{ml,mli} are new.
They construct syntax error messages, based on the compiled mapping.
cparser/Lexer.mll is modified.
The last two tokens that have been read are stored in a buffer.
ErrorReports is called to construct a syntax error message.
cparser/GNUmakefile is new.
It offers several commands for working on the pre-parser.
cparser/deLexer.ml is new.
It is a script (it is not linked into CompCert).
It translates the symbolic name of a token to an example of this
token in concrete C syntax.
It is used by [make -C cparser concrete] to produce the .c files
in tests/generated/.
cparser/tests/generated/Makefile is new.
It runs ccomp, clang and gcc on each of the generated C files,
so as to allow a comparison of the error messages.
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"table" back-ends when compiling CompCert.
For now, MENHIR_TABLE is set to false, so CompCert is not affected.
Setting MENHIR_TABLE to true builds CompCert using Menhir's table back-end.
This causes a small but repeatable slowdown on "make test", about 2% (roughly 1 second out of 40).
I have tested building ccomp and ccomp.byte.
I have tested with an ocamlfind-installed menhir and with a manually-installed menhir.
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Passing --no-stdlib ensures that there is no dependency on Menhir's
standard library.
Passing -v, which is equivalent to --explain --dump, requests the
generation of pre_parser.automaton, a description of the automaton.
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printing duplicated -I flags.
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