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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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The json export prints formatted json, which takes a lot of
additional time, however the result is only consumed by other tools
and not meant for human reading.
This commit implements several small changes in order to speedup
the json export:
* Removal of usage of the Format Module
* Replacing `fprintf` calls by calls to function that print
directly, such as `output_string`, etc.
* Replacing list of all instruction names by a set of all
instructions
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The operation comples down to conditional moves.
Both integer and floating-point conditional moves are supported.
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* Generate a nop instruction after ais annotations.
In order to prevent the merging of ais annotations with following
Labels a nop instruction is inserted, but only if the annotation
is followed immediately by a label.
The insertion of nop instructions is performed during the
expansion of builtin and pseudo assembler instructions and is
processor independent, by inserting a __builtin_nop built-in.
* Add Pnop instruction to ARM, RISC-V, and x86
ARM as well as RISC-V don't have nop instructions that can
be easily encoded by for example add with zero instructions.
For x86 we used to use `mov X0, X0` for nop but this may
not be as efficient as the true nop instruction.
* Implement __builtin_nop on all supported target architectures.
This builtin is not yet made available on the C side for all architectures.
Bug 24067
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This allows us to replacing them by their address in valex and
additionally checking them.
Bug 22438
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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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immediates can be encoded.
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This commit introduces a new pass which is run after the expansion of the
builtin functions which performs the expansion and placement of
constants inside the function code.
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The architecture which was configured is now exported in a new top-level json field.
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The json export for the abstract ARM Assembler is quite similar
to it's PowerPC equivalent expect for the different instruction
arguments.
Bug 22472
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This option allows it to dump a list of all used mnemonics into
a file.
Bug 22239
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Instead of just dumping the json output it is now a little bit
formatted for better reading.
Furthermore the AsmToJson function for the non powerpc targets now
prints the json value "null" sucht that the resulting json file is
valid json.
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