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Remove need for alignment lb_struct_has_padding_prefix

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gingerBill
2021-10-02 16:06:42 +01:00
parent 58a405cc9f
commit ebca0398a7
3 changed files with 15 additions and 18 deletions
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1
src/llvm_backend.hpp
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@@ -451,7 +451,6 @@ void lb_reset_copy_elision_hint(lbProcedure *p, lbCopyElisionHint prev_hint);
lbValue lb_consume_copy_elision_hint(lbProcedure *p);
bool lb_struct_has_padding_prefix(Type *t);
lbStructFieldRemapping lb_get_struct_remapping(lbModule *m, Type *t);
LLVMTypeRef lb_type_padding_filler(lbModule *m, i64 padding, i64 padding_align);

27
src/llvm_backend_general.cpp
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@@ -1674,13 +1674,21 @@ LLVMTypeRef lb_type_internal(lbModule *m, Type *type) {
type_set_offsets(type);
if (type->Struct.is_raw_union) {
unsigned field_count = 2;
LLVMTypeRef *fields = gb_alloc_array(permanent_allocator(), LLVMTypeRef, field_count);
i64 alignment = type_align_of(type);
unsigned alignment = cast(unsigned)type_align_of(type);
unsigned size_of_union = cast(unsigned)type_size_of(type);
fields[0] = lb_alignment_prefix_type_hack(m, gb_min(alignment, 16));
fields[1] = LLVMArrayType(lb_type(m, t_u8), size_of_union);
return LLVMStructTypeInContext(ctx, fields, field_count, false);
GB_ASSERT(size_of_union % alignment == 0);
lbStructFieldRemapping field_remapping = {};
slice_init(&field_remapping, permanent_allocator(), 1);
LLVMTypeRef fields[1] = {};
fields[0] = lb_type_padding_filler(m, size_of_union, alignment);
field_remapping[0] = 0;
LLVMTypeRef struct_type = LLVMStructTypeInContext(ctx, fields, gb_count_of(fields), false);
map_set(&m->struct_field_remapping, hash_pointer(struct_type), field_remapping);
map_set(&m->struct_field_remapping, hash_pointer(type), field_remapping);
return struct_type;
}
lbStructFieldRemapping field_remapping = {};
@@ -1689,13 +1697,8 @@ LLVMTypeRef lb_type_internal(lbModule *m, Type *type) {
m->internal_type_level += 1;
defer (m->internal_type_level -= 1);
auto fields = array_make<LLVMTypeRef>(temporary_allocator(), 0, type->Struct.fields.count*2 + 2);
auto fields = array_make<LLVMTypeRef>(temporary_allocator(), 0, type->Struct.fields.count*2 + 1);
if (lb_struct_has_padding_prefix(type)) {
LLVMTypeRef padding_offset = lb_alignment_prefix_type_hack(m, type->Struct.custom_align);
array_add(&fields, padding_offset);
}
i64 padding_offset = 0;
for_array(i, type->Struct.fields) {
GB_ASSERT(type->Struct.offsets != nullptr);

5
src/llvm_backend_utility.cpp
View File

@@ -808,11 +808,6 @@ lbValue lb_address_from_load(lbProcedure *p, lbValue value) {
}
bool lb_struct_has_padding_prefix(Type *t) {
Type *bt = base_type(t);
GB_ASSERT(bt->kind == Type_Struct);
return bt->Struct.custom_align != 0 && bt->Struct.fields.count == 0;
}
lbStructFieldRemapping lb_get_struct_remapping(lbModule *m, Type *t) {
t = base_type(t);
LLVMTypeRef struct_type = lb_type(m, t);