bjoernager/rust
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Implement raw ptr -> usize cast

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This commit is contained in:
bjorn3 2018-08-09 11:07:10 +02:00
parent f900b99e27
commit 6c86274943
2 changed files with 8 additions and 1 deletions
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4
examples/example.rs
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@ -154,3 +154,7 @@ fn repeat_array() -> [u8; 3] {
unsafe fn use_ctlz_nonzero(a: u16) -> u16 {
intrinsics::ctlz_nonzero(a)
}
fn ptr_as_usize(ptr: *const u8) -> usize {
ptr as usize
}

5
src/base.rs
View file

@ -379,6 +379,9 @@ fn trans_stmt<'a, 'tcx: 'a>(fx: &mut FunctionCx<'a, 'tcx>, cur_ebb: Ebb, stmt: &
| (TypeVariants::TyRawPtr(..), TypeVariants::TyRawPtr(..)) => {
lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
}
(TypeVariants::TyRawPtr(..), TypeVariants::TyUint(_)) if to_ty.sty == fx.tcx.types.usize.sty => {
lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
}
(TypeVariants::TyChar, TypeVariants::TyUint(_))
| (TypeVariants::TyUint(_), TypeVariants::TyInt(_))
| (TypeVariants::TyUint(_), TypeVariants::TyUint(_)) => {
@ -392,7 +395,7 @@ fn trans_stmt<'a, 'tcx: 'a>(fx: &mut FunctionCx<'a, 'tcx>, cur_ebb: Ebb, stmt: &
let res = crate::common::cton_intcast(fx, from, from_ty, to_ty, true);
lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
}
_ => unimpl!("rval misc {:?} {:?}", operand, to_ty),
_ => unimpl!("rval misc {:?} {:?}", from_ty, to_ty),
}
}
Rvalue::Cast(CastKind::ClosureFnPointer, operand, ty) => {