Does make me wonder what restrict-related bugs will be (have been?) uncovered in GCC, if any. Or whether the GCC devs saw what LLVM went through and decided to try to address any issues preemptively.
gcc has had restrict for 25 years I think. I would hope most bugs have been squashed by now.
Possibly? LLVM had been around for a while as well but Rust still ended up running into aliasing-related optimizer bugs.
Now that I think about it some more, perhaps gfortran might be a differentiating factor? Not familiar enough with Fortran to guess as to how much it would exercise aliasing-related optimizations, though.
I think Fortran function arguments are assumed not to alias. I'm not sure if it matches C restrict semantics though.
Yeah, that's why I was wondering whether GCC might have shaken out its aliasing bugs. Sibling seems to recall otherwise, though.
Just look at the utter failure of `restrict`. It was so rarely used in C that it took several years of constant nagging from Rust developers to iron out various bugs in compilers caused by it.