GCC16 or 17: when is the pointed type relevant for emitted assembler code?
Basile STARYNKEVITCH <[email protected]>
| Newsgroups | gmane.comp.gcc.devel |
|---|---|
| Message-ID | <[email protected]> |
Hello all, Assume GCC16 (or future GCC17) targetting a common Von Neumann 64 bits architecture (eg RISCV, AMD64, ARM-Aarch64, POWERPC-64). Are there cases where the pointed type changes the generated code. To be more concrete, I am thinking of generated C99 or C17 code (not human written one). If every generated pointer was void* and at every dereferencing occurrence explicitly casted to the actual data pointer, does that make any difference in generated assembler code? In other words, is declaring only void* fields and local variables and casting them on every dereferencing use makes a difference in generated code. My guess is no, but I could be wrong. Thanks -- Basile STARYNKEVITCH <[email protected]> 8 rue de la Faïencerie http://starynkevitch.net/Basile/ 92340 Bourg-la-Reine https://github.com/bstarynk France https://github.com/RefPerSys/RefPerSys https://orcid.org/0000-0003-0908-5250