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Folkert 2021-09-06 22:23:23 +02:00
parent 889abaa3b4
commit 3fb6736f7c
1 changed files with 9 additions and 2 deletions
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11
compiler/gen_llvm/src/llvm/build.rs
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@ -2189,8 +2189,15 @@ fn list_literal<'a, 'ctx, 'env>(
let global = {
let mut global_elements = Vec::with_capacity_in(list_length, env.arena);
// insert NULL bytes for the refcount
// these elements are (dropped again if the list contains non-constants)
// Add zero bytes that represent the refcount
//
// - if all elements are const, then we store the whole list as a constant.
// It then needs a refcount before the first element.
// - but if the list is not all constants, then we will just copy the constant values,
// and we do not need that refcount at the start
//
// In the latter case, we won't store the zeros in the globals
// (we slice them off again below)
for _ in 0..zero_elements {
global_elements.push(element_type.const_zero());
}