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Fix #1966

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gingerBill
2022-08-24 12:52:57 +01:00
parent 777aa8b118
commit f1ffd90294
1 changed files with 14 additions and 2 deletions
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src/types.cpp
+14 -2
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@@ -3571,10 +3571,22 @@ i64 type_align_of_internal(Type *t, TypePath *path) {
return build_context.word_size; return build_context.word_size;
} }
// return gb_clamp(next_pow2(type_size_of(t)), 1, build_context.max_align); i64 max_alignment = build_context.word_size;
if (is_arch_wasm()) {
// NOTE(bill): wasm32 with LLVM defines its default datalayout as:
//
// e-m:e-p:32:32-i64:64-n32:64-S128
//
// This means that the alignment of a 64-bit type is 64-bits and not 32-bits like
// on other 32-bit architectures
//
// See: https://github.com/WebAssembly/tool-conventions/blob/main/BasicCABI.md
max_alignment = 8;
}
// NOTE(bill): Things that are bigger than build_context.word_size, are actually comprised of smaller types // NOTE(bill): Things that are bigger than build_context.word_size, are actually comprised of smaller types
// TODO(bill): Is this correct for 128-bit types (integers)? // TODO(bill): Is this correct for 128-bit types (integers)?
return gb_clamp(next_pow2(type_size_of_internal(t, path)), 1, build_context.word_size); return gb_clamp(next_pow2(type_size_of_internal(t, path)), 1, max_alignment);
} }
i64 *type_set_offsets_of(Slice<Entity *> const &fields, bool is_packed, bool is_raw_union) { i64 *type_set_offsets_of(Slice<Entity *> const &fields, bool is_packed, bool is_raw_union) {