squiid/rust
1
0
Fork 0
Code Issues Pull requests Projects Activity

Rustup to rustc 1.38.0-nightly (534b42394 2019-08-09)

Browse source
This commit is contained in:
bjorn3 2019-08-13 12:18:35 +02:00
parent 5459b157ca
commit f9c20ce244
1 changed files with 28 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
src/intrinsics.rs
View file

@ -601,6 +601,34 @@ pub fn codegen_intrinsic_call<'a, 'tcx: 'a>(
}
}
};
uninit, () {
if ret.layout().abi == Abi::Uninhabited {
crate::trap::trap_panic(fx, "[panic] Called intrinsic::uninit for uninhabited type.");
return;
}
match ret {
CPlace::NoPlace(_layout) => unreachable!("{:?}", ret),
CPlace::Var(var, layout) => {
let clif_ty = fx.clif_type(layout.ty).unwrap();
let val = match clif_ty {
types::I8 | types::I16 | types::I32 | types::I64 => fx.bcx.ins().iconst(clif_ty, 42),
types::F32 => {
let zero = fx.bcx.ins().iconst(types::I32, 0xdeadbeef);
fx.bcx.ins().bitcast(types::F32, zero)
}
types::F64 => {
let zero = fx.bcx.ins().iconst(types::I64, 0xcafebabedeadbeefu64 as i64);
fx.bcx.ins().bitcast(types::F64, zero)
}
_ => panic!("clif_type returned {}", clif_ty),
};
fx.bcx.def_var(mir_var(var), val);
}
CPlace::Addr(_, _, _) | CPlace::Stack(_, _) => {
// Don't write to `ret`, as the destination memory is already uninitialized.
}
}
};
write_bytes, (c dst, v val, v count) {
let pointee_ty = dst.layout().ty.builtin_deref(true).unwrap().ty;
let pointee_size = fx.layout_of(pointee_ty).size.bytes();