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Fix some empty list edge cases

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This commit is contained in:
Richard Feldman 2020-06-25 00:02:52 -04:00
parent 5cec577427
commit 0550af17d2
3 changed files with 113 additions and 81 deletions
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7
compiler/gen/src/llvm/build.rs
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@ -386,6 +386,13 @@ pub fn build_expr<'a, 'ctx, 'env>(
BasicValueEnum::PointerValue(ptr)
}
}
EmptyArray => {
let struct_type = collection(env.context, env.ptr_bytes);
// The pointer should be null (aka zero) and the length should be zero,
// so the whole struct should be a const_zero
BasicValueEnum::StructValue(struct_type.const_zero())
}
Array { elem_layout, elems } => {
let ctx = env.context;
let elem_type = basic_type_from_layout(env.arena, ctx, elem_layout, env.ptr_bytes);