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cfrontend/C2C.ml
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The new diagnostics is triggered if a conditional is used that
may not be transformed into linear code by the later by the
if conversion.
The new diagnostic is emitted if a conditional may contain an
unsafe expression or is contained within another conditional,
logical and or logical or expression. An expression is unsafe if
it contains a call, changes memory or if its evaluation leads to
undefined behavior, for example division and modulo.
Also fixes a small typo in a comment in Cutil.
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This is a manual, partial merge of Github pull request #296 by @Fourchaux.
flocq/, cparser/MenhirLib/ and parts of test/ have not been changed
because these are local copies and the fixes should be performed upstream.
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The new diagnostic triggers if an `_Alignas` or an `aligned` attribute
or a `packed` attribute requests an alignment smaller than the natural alignment.
Bug 23389
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Tentative static definitions with incomplete type are not allowed
in C99. However most popular compilers support them and warn
about them.
Bug 23377
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* Error for structs with only flex array member
Flexible array members are only allowed if another member exists.
Bug 23324
* Added checks for nesting of structs with flex array members
Warn if a struct with a flex array member is used as array element
or member of another struct. Such usage is dubious.
Bug 23324
Don't warn if the struct-with-flex-array is a member of an union.
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Nonstatic inline functions can be expanded in several compilation units.
The static variables in question may differ between different expansions.
This is a manual merge and adaptation of pull request #P95 by @bschommer.
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Warning for change of storage class after the definition of a function
from default storage class to extern storage class. This only plays a
role if the function is also declared inline, since for inline functions
with default storage class no code is generated, but for inline functions
with extern storage class code should be generated.
Bug 23512
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The new warning is raise for function declaration after a function
definition that introduce new attributes, which are ignored.
Bug 23385
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Include the format specifier in error message when available in
order to make it easier to spot the broken ais parameter.
Futhermore introduce a new warning for unused ais parameters.
Bug 22464
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The ais annotations are now handled in a separate file shared
between all architectures. Also two different variants of
replacements are supported, %e which expands to ais expressions
and %l which also expands to an ais expression but is guaranted to
be usable as l-value in the ais annotation. Otherwise the new
warning is Wrong_is_parameter is generated.
Also an error message is generated if floating point variables are
used in ais annotations since a3 does not support them at the
moment.
Additionally an error message is generated for plain volatile
variables used, since they will enforce a volatile load and result
in the value being passed to the annotation instead of the address
as other global variables.
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* Module Cerrors is now called Diagnostic and can be used in parts of CompCert other than cparser/
* Replaced eprintf error. Instead of having eprintf msg; exit 2 use the functions from the
Diagnostics module.
* Raise on error before calling external tools.
* Added diagnostics to clightgen.
* Fix error handling of AsmToJson.
* Cleanup error handling of Elab and C2C.
*The implementation of location printing (file & line) is simplified and correctly prints valid filenames with invalid lines.
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