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Implement lt, le, ge and gt for fat pointers

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This commit is contained in:
bjorn3 2019-05-04 18:40:49 +02:00
parent c0779d5d1d
commit bd73128d2e
1 changed files with 23 additions and 4 deletions
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27
src/base.rs
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@ -1052,6 +1052,7 @@ fn trans_ptr_binop<'a, 'tcx: 'a>(
} else {
let (lhs_ptr, lhs_extra) = lhs.load_scalar_pair(fx);
let (rhs_ptr, rhs_extra) = rhs.load_scalar_pair(fx);
let res = match bin_op {
BinOp::Eq => {
let ptr_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_ptr, rhs_ptr);
@ -1063,10 +1064,28 @@ fn trans_ptr_binop<'a, 'tcx: 'a>(
let extra_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_extra, rhs_extra);
fx.bcx.ins().bor(ptr_ne, extra_ne)
}
_ => unimplemented!(
"trans_ptr_binop({:?}, <fat ptr>, <fat ptr>) not implemented",
bin_op
),
BinOp::Lt | BinOp::Le | BinOp::Ge | BinOp::Gt => {
let ptr_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_ptr, rhs_ptr);
let ptr_cmp = fx.bcx.ins().icmp(match bin_op {
BinOp::Lt => IntCC::UnsignedLessThan,
BinOp::Le => IntCC::UnsignedLessThanOrEqual,
BinOp::Ge => IntCC::UnsignedGreaterThanOrEqual,
BinOp::Gt => IntCC::UnsignedGreaterThan,
_ => unreachable!(),
}, lhs_ptr, rhs_ptr);
let extra_cmp = fx.bcx.ins().icmp(match bin_op {
BinOp::Lt => IntCC::UnsignedLessThan,
BinOp::Le => IntCC::UnsignedLessThanOrEqual,
BinOp::Ge => IntCC::UnsignedGreaterThanOrEqual,
BinOp::Gt => IntCC::UnsignedGreaterThan,
_ => unreachable!(),
}, lhs_extra, rhs_extra);
fx.bcx.ins().select(ptr_eq, extra_cmp, ptr_cmp)
}
_ => panic!("bin_op {:?} on ptr", bin_op),
};
assert_eq!(fx.tcx.types.bool, ret_ty);