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Rvalue::Len

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This commit is contained in:
bjorn3 2018-08-22 17:58:25 +02:00
parent 12282a8ebc
commit fa4a37759b
2 changed files with 15 additions and 10 deletions
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10
src/base.rs
View file

@ -474,7 +474,15 @@ fn trans_stmt<'a, 'tcx: 'a>(
to.write_cvalue(fx, operand);
}
}
Rvalue::Len(lval) => unimpl!("rval len {:?}", lval),
Rvalue::Len(place) => {
let place = trans_place(fx, place);
let size = match place {
CPlace::Addr(_, size, _) => size.unwrap(),
CPlace::Var(_, _) => unreachable!(),
};
let usize_layout = fx.layout_of(fx.tcx.types.usize);
lval.write_cvalue(fx, CValue::ByVal(size, usize_layout));
}
Rvalue::NullaryOp(NullOp::Box, ty) => unimplemented!("rval box {:?}", ty),
Rvalue::NullaryOp(NullOp::SizeOf, ty) => {
assert!(

15
src/common.rs
View file

@ -433,23 +433,20 @@ impl<'a, 'tcx: 'a> CPlace<'tcx> {
fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
index: Value,
) -> CPlace<'tcx> {
let addr = self.expect_addr();
let layout = self.layout();
if layout.is_unsized() {
unimpl!("unsized place_field");
}
match layout.ty.sty {
match self.layout().ty.sty {
ty::Array(elem_ty, _) => {
let elem_layout = fx.layout_of(elem_ty);
let offset = fx
.bcx
.ins()
.imul_imm(index, elem_layout.size.bytes() as i64);
let addr = self.expect_addr();
CPlace::Addr(fx.bcx.ins().iadd(addr, offset), None, elem_layout)
}
ty::Slice(_elem_ty) => unimplemented!("place_index(TySlice)"),
_ => bug!("place_index({:?})", layout.ty),
ty::Slice(_elem_ty) => unimpl!("place_index(TySlice)"),
_ => bug!("place_index({:?})", self.layout().ty),
}
}