| Issue |
96368
|
| Summary |
LLVM Language Reference for Prefix Data self-contradictory re: function entry point versus function descriptor
|
| Labels |
llvm
|
| Assignees |
|
| Reporter |
hubert-reinterpretcast
|
https://llvm.org/docs/LangRef.html#prologuedata says:
> Prefix data is data associated with a function which the code generator will emit immediately before the function’s entrypoint.
However, it goes on to say:
> To access the data for a given function, a program may bitcast the function pointer to a pointer to the constant’s type and dereference index -1.
These statements are contradictory for targets that use function descriptors (an example being the 64-bit PowerPC ELFv1 ABI: https://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html#FUNC-DES).
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