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Sema: do not create slices with undefined pointers

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The undef pointer ended up being zero on wasm32.
This commit is contained in:
Veikka Tuominen 2023-01-17 20:06:41 +02:00
parent 3b2c421102
commit fc066992d9
1 changed files with 6 additions and 1 deletions
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7
src/Sema.zig
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@ -24822,8 +24822,13 @@ fn coerceExtra(
// empty tuple to zero-length slice
// note that this allows coercing to a mutable slice.
if (inst_child_ty.structFieldCount() == 0) {
// Optional slice is represented with a null pointer so
// we use a dummy pointer value with the required alignment.
const slice_val = try Value.Tag.slice.create(sema.arena, .{
.ptr = Value.undef,
.ptr = if (dest_info.@"align" != 0)
try Value.Tag.int_u64.create(sema.arena, dest_info.@"align")
else
try inst_child_ty.lazyAbiAlignment(target, sema.arena),
.len = Value.zero,
});
return sema.addConstant(dest_ty, slice_val);