| Commit message (Collapse) | Author | Age | Files | Lines |
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Conflicts:
Makefile
configure
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- Add support for the Win64 ABI to the x86_64 port
- Update vararg support to handle Win64 conventions
- Configure support for x86_64-cygwin64
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32-bit executables cannot be built since XCode 10.0 (sep 2018).
32-bit executables cannot be executed since MacOS 10.15 (oct 2019).
Better remove x86-32 support and fail at configuration time instead of
at the end of the build.
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__builtin_sqrt (no "f") is the name used by GCC and Clang.
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These functions are now available on all targets.
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__builtin_fabs has already been expanded in backend/Selection.v .
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The name_of_register and register_of_name function are shared between
all architectures and can be moved in a common file.
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The function is in fact just a call to the
function`is_callee_save_register` from `Conventions1.v`.
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Replace the pattern `try Some (Hashtbl.find ...) with Not_found -> None`
by a call to the function Hashtbl.find_opt.
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Merge branch 'dm-cse2-naive' of https://github.com/monniaux/CompCert into mppa-cse2
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gricad-gitlab.univ-grenoble-alpes.fr:sixcy/CompCert into mppa-work
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The "size_arguments" function and its properties can be systematically
derived from the "loc_arguments" function and its properties.
Before, the RISC-V port used this derivation, and all other ports
used hand-written "size_arguments" functions and proofs.
This commit moves the definition of "size_arguments" to the
platform-independent file backend/Conventions.v, using the systematic
derivation, and removes the platform-specific definitions.
This reduces code and proof size, and makes it easier to change the
calling conventions.
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mppa-work-upstream-merge
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Some ABIs leave more flexibility concerning function return values
than CompCert expects.
For example, the x86 ABI says that a function result of type "char" is
returned in register AL, leaving the top 24 bits of register EAX
unspecified, while CompCert expects EAX to contain 32 valid bits,
namely the zero- or sign-extension of the 8-bit result.
This commits adds a general mechanism to insert "re-normalization"
conversions on the results of function calls. Currently, it only
deals with results of small integer types, and inserts zero- or
sign-extensions if so instructed by a platform-dependent function,
Convention1.return_value_needs_normalization.
The conversions in question are inserted early in the front-end, so
that they can be optimized away in the back-end.
The semantic preservation proof is still conducted against the
CompCert model, where the return values of functions are already
normalized. What the proof shows is that the extra conversions have
no effect in this case. In future work we could relax the CompCert model,
allowing functions to return values that are not normalized.
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Before it was "option typ". Now it is a proper inductive type
that can also express small integer types (8/16-bit unsigned/signed integers).
One benefit is that external functions get more precise types that
control better their return values. As a consequence,
the CompCert C type preservation property now holds unconditionally,
without extra typing hypotheses on external functions.
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This reverts commit 4dfcd7d4be18e8bc437ca170782212aa06635a95.
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The `__builtin_nop` function is documented only for PowerPC.
It was added to the other architectures by copy paste, but has no
known uses. So, remove `__builtin_nop` from all architectures
but PowerPC.
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gricad-gitlab.univ-grenoble-alpes.fr:sixcy/CompCert into mppa-non-trapping-load
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