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Introduce NullOp::AlignOf

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This commit is contained in:
Gary Guo 2021-09-07 16:06:07 +01:00
parent b69fe57261
commit 1c3409f333
13 changed files with 54 additions and 33 deletions
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9
compiler/rustc_mir_transform/src/lower_intrinsics.rs
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@ -92,14 +92,19 @@ impl<'tcx> MirPass<'tcx> for LowerIntrinsics {
// since their semantics depend on the value of overflow-checks flag used
// during codegen. Issue #35310.
}
sym::size_of => {
sym::size_of | sym::min_align_of => {
if let Some((destination, target)) = *destination {
let tp_ty = substs.type_at(0);
let null_op = match intrinsic_name {
sym::size_of => NullOp::SizeOf,
sym::min_align_of => NullOp::AlignOf,
_ => bug!("unexpected intrinsic"),
};
block.statements.push(Statement {
source_info: terminator.source_info,
kind: StatementKind::Assign(Box::new((
destination,
Rvalue::NullaryOp(NullOp::SizeOf, tp_ty),
Rvalue::NullaryOp(null_op, tp_ty),
))),
});
terminator.kind = TerminatorKind::Goto { target };