bjoernager/rust
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Lower unchecked_{div, rem} to BinOp::{Div, Rem}

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This commit is contained in:
Scott McMurray 2023-05-31 23:58:20 -07:00
parent 9af3865dec
commit 32cc106af3
23 changed files with 123 additions and 52 deletions
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51
compiler/rustc_mir_transform/src/lower_intrinsics.rs
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@ -82,30 +82,35 @@ impl<'tcx> MirPass<'tcx> for LowerIntrinsics {
drop(args);
terminator.kind = TerminatorKind::Goto { target };
}
sym::wrapping_add | sym::wrapping_sub | sym::wrapping_mul => {
if let Some(target) = *target {
let lhs;
let rhs;
{
let mut args = args.drain(..);
lhs = args.next().unwrap();
rhs = args.next().unwrap();
}
let bin_op = match intrinsic_name {
sym::wrapping_add => BinOp::Add,
sym::wrapping_sub => BinOp::Sub,
sym::wrapping_mul => BinOp::Mul,
_ => bug!("unexpected intrinsic"),
};
block.statements.push(Statement {
source_info: terminator.source_info,
kind: StatementKind::Assign(Box::new((
*destination,
Rvalue::BinaryOp(bin_op, Box::new((lhs, rhs))),
))),
});
terminator.kind = TerminatorKind::Goto { target };
sym::wrapping_add
| sym::wrapping_sub
| sym::wrapping_mul
| sym::unchecked_div
| sym::unchecked_rem => {
let target = target.unwrap();
let lhs;
let rhs;
{
let mut args = args.drain(..);
lhs = args.next().unwrap();
rhs = args.next().unwrap();
}
let bin_op = match intrinsic_name {
sym::wrapping_add => BinOp::Add,
sym::wrapping_sub => BinOp::Sub,
sym::wrapping_mul => BinOp::Mul,
sym::unchecked_div => BinOp::Div,
sym::unchecked_rem => BinOp::Rem,
_ => bug!("unexpected intrinsic"),
};
block.statements.push(Statement {
source_info: terminator.source_info,
kind: StatementKind::Assign(Box::new((
*destination,
Rvalue::BinaryOp(bin_op, Box::new((lhs, rhs))),
))),
});
terminator.kind = TerminatorKind::Goto { target };
}
sym::add_with_overflow | sym::sub_with_overflow | sym::mul_with_overflow => {
if let Some(target) = *target {