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Improved comment

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Chad Stearns 2020-08-29 22:44:56 -04:00
parent 257cb88511
commit 379235fd7e
1 changed files with 4 additions and 7 deletions
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11
compiler/gen/src/llvm/build_list.rs
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@ -980,13 +980,10 @@ where
index_alloca index_alloca
} }
// In many cases we dont want to do anything if the // This function checks if the list is empty, and
// builtin was given an empty list. This is because // if it is, it returns an empty list, and if not
// allocating memory for a list is costly, so its // it runs whatever code is passed in under `build_non_empty`
// better to skip if it we can. Furthermore, checking // This is the avoid allocating memory if the list is empty.
// if a list is empty requires both seeing if the list
// is a NonEmpty layout and if its a List(elem_layout)
// but with a length of 0.
fn if_list_is_not_empty<'a, 'ctx, 'env, 'b, NonEmptyFn>( fn if_list_is_not_empty<'a, 'ctx, 'env, 'b, NonEmptyFn>(
env: &Env<'a, 'ctx, 'env>, env: &Env<'a, 'ctx, 'env>,
parent: FunctionValue<'ctx>, parent: FunctionValue<'ctx>,