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Workaround for missing icmp{,_imm}.i128 legalizations

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Fixes #667
This commit is contained in:
bjorn3
2019-08-15 11:36:06 +02:00
parent 9505d60a24
commit 7c7a8e8367
6 changed files with 103 additions and 160 deletions
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34
src/codegen_i128.rs
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@@ -73,39 +73,7 @@ pub fn maybe_codegen<'a, 'tcx>(
}
BinOp::Lt | BinOp::Le | BinOp::Eq | BinOp::Ge | BinOp::Gt | BinOp::Ne => {
assert!(!checked);
let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs_val);
let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs_val);
let res = match bin_op {
BinOp::Eq => {
let lsb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_lsb, rhs_lsb);
let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
fx.bcx.ins().band(lsb_eq, msb_eq)
}
BinOp::Ne => {
let lsb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_lsb, rhs_lsb);
let msb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_msb, rhs_msb);
fx.bcx.ins().bor(lsb_ne, msb_ne)
}
_ => {
// if msb_eq {
// lsb_cc
// } else {
// msb_cc
// }
let cc = crate::num::bin_op_to_intcc(bin_op, is_signed).unwrap();
let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
let lsb_cc = fx.bcx.ins().icmp(cc, lhs_lsb, rhs_lsb);
let msb_cc = fx.bcx.ins().icmp(cc, lhs_msb, rhs_msb);
fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
}
};
let res = fx.bcx.ins().bint(types::I8, res);
let res = CValue::by_val(res, fx.layout_of(fx.tcx.types.bool));
return Some(res);
return None;
}
BinOp::Shl | BinOp::Shr => {
let is_overflow = if checked {