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Add split multiple return to different ABIs

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gingerBill
2022-11-24 12:14:19 +00:00
parent 7352c312e0
commit 90415e4a6e
1 changed files with 75 additions and 43 deletions
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src/llvm_abi.cpp
+75 -43
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@@ -329,17 +329,55 @@ i64 lb_alignof(LLVMTypeRef type) {
#define LB_ABI_INFO(name) lbFunctionType *name(LLVMContextRef c, LLVMTypeRef *arg_types, unsigned arg_count, LLVMTypeRef return_type, bool return_is_defined, bool return_is_tuple, ProcCallingConvention calling_convention)
typedef LB_ABI_INFO(lbAbiInfoType);
#define LB_ABI_COMPUTE_RETURN_TYPE(name) lbArgType name(lbFunctionType *ft, LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined, bool return_is_tuple)
typedef LB_ABI_COMPUTE_RETURN_TYPE(lbAbiComputeReturnType);
lbArgType lb_abi_modify_return_is_tuple(lbFunctionType *ft, LLVMContextRef c, LLVMTypeRef return_type, lbAbiComputeReturnType *compute_return_type) {
GB_ASSERT(return_type != nullptr);
GB_ASSERT(compute_return_type != nullptr);
lbArgType return_arg = {};
if (lb_is_type_kind(return_type, LLVMStructTypeKind)) {
unsigned field_count = LLVMCountStructElementTypes(return_type);
if (field_count > 1) {
ft->original_arg_count = ft->args.count;
ft->multiple_return_original_type = return_type;
for (unsigned i = 0; i < field_count-1; i++) {
LLVMTypeRef field_type = LLVMStructGetTypeAtIndex(return_type, i);
LLVMTypeRef field_pointer_type = LLVMPointerType(field_type, 0);
lbArgType ret_partial = lb_arg_type_direct(field_pointer_type);
array_add(&ft->args, ret_partial);
}
// override the return type for the last field
LLVMTypeRef new_return_type = LLVMStructGetTypeAtIndex(return_type, field_count-1);
return_arg = compute_return_type(ft, c, new_return_type, true, false);
}
}
return return_arg;
}
#define LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO() do { \
if (return_is_tuple) { \
lbArgType new_return_type = lb_abi_modify_return_is_tuple(ft, c, return_type, compute_return_type); \
if (new_return_type.type != nullptr) { \
return new_return_type; \
} \
} \
} while (0)
// NOTE(bill): I hate `namespace` in C++ but this is just because I don't want to prefix everything
namespace lbAbi386 {
Array<lbArgType> compute_arg_types(LLVMContextRef c, LLVMTypeRef *arg_types, unsigned arg_count);
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined);
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type);
LB_ABI_INFO(abi_info) {
lbFunctionType *ft = gb_alloc_item(permanent_allocator(), lbFunctionType);
ft->ctx = c;
ft->args = compute_arg_types(c, arg_types, arg_count);
ft->ret = compute_return_type(c, return_type, return_is_defined);
ft->ret = compute_return_type(ft, c, return_type, return_is_defined, return_is_tuple);
ft->calling_convention = calling_convention;
return ft;
}
@@ -391,7 +429,7 @@ namespace lbAbi386 {
return args;
}
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined) {
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type) {
if (!return_is_defined) {
return lb_arg_type_direct(LLVMVoidTypeInContext(c));
} else if (lb_is_type_kind(return_type, LLVMStructTypeKind) || lb_is_type_kind(return_type, LLVMArrayTypeKind)) {
@@ -402,6 +440,9 @@ namespace lbAbi386 {
case 4: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 32), nullptr, nullptr);
case 8: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 64), nullptr, nullptr);
}
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
}
@@ -411,7 +452,7 @@ namespace lbAbi386 {
namespace lbAbiAmd64Win64 {
Array<lbArgType> compute_arg_types(LLVMContextRef c, LLVMTypeRef *arg_types, unsigned arg_count);
lbArgType compute_return_type(lbFunctionType *ft, LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined, bool return_is_tuple);
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type);
LB_ABI_INFO(abi_info) {
lbFunctionType *ft = gb_alloc_item(permanent_allocator(), lbFunctionType);
@@ -448,7 +489,7 @@ namespace lbAbiAmd64Win64 {
return args;
}
lbArgType compute_return_type(lbFunctionType *ft, LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined, bool return_is_tuple) {
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type) {
if (!return_is_defined) {
return lb_arg_type_direct(LLVMVoidTypeInContext(c));
} else if (lb_is_type_kind(return_type, LLVMStructTypeKind) || lb_is_type_kind(return_type, LLVMArrayTypeKind)) {
@@ -460,26 +501,7 @@ namespace lbAbiAmd64Win64 {
case 8: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 64), nullptr, nullptr);
}
if (return_is_tuple) {
GB_ASSERT(lb_is_type_kind(return_type, LLVMStructTypeKind));
unsigned field_count = LLVMCountStructElementTypes(return_type);
if (field_count > 1) {
ft->original_arg_count = ft->args.count;
ft->multiple_return_original_type = return_type;
for (unsigned i = 0; i < field_count-1; i++) {
LLVMTypeRef field_type = LLVMStructGetTypeAtIndex(return_type, i);
LLVMTypeRef field_pointer_type = LLVMPointerType(field_type, 0);
lbArgType ret_partial = lb_arg_type_direct(field_pointer_type);
array_add(&ft->args, ret_partial);
}
// override the return type for the last field
LLVMTypeRef new_return_type = LLVMStructGetTypeAtIndex(return_type, field_count-1);
return compute_return_type(ft, c, new_return_type, true, false);
}
}
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
@@ -536,7 +558,7 @@ namespace lbAbiAmd64SysV {
Amd64TypeAttribute_StructRect,
};
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined);
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type);
void classify_with(LLVMTypeRef t, Array<RegClass> *cls, i64 ix, i64 off);
void fixup(LLVMTypeRef t, Array<RegClass> *cls);
lbArgType amd64_type(LLVMContextRef c, LLVMTypeRef type, Amd64TypeAttributeKind attribute_kind, ProcCallingConvention calling_convention);
@@ -933,7 +955,7 @@ namespace lbAbiAmd64SysV {
}
}
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined) {
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type) {
if (!return_is_defined) {
return lb_arg_type_direct(LLVMVoidTypeInContext(c));
} else if (lb_is_type_kind(return_type, LLVMStructTypeKind)) {
@@ -944,6 +966,9 @@ namespace lbAbiAmd64SysV {
case 4: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 32), nullptr, nullptr);
case 8: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 64), nullptr, nullptr);
}
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
} else if (build_context.metrics.os == TargetOs_windows && lb_is_type_kind(return_type, LLVMIntegerTypeKind) && lb_sizeof(return_type) == 16) {
@@ -956,13 +981,13 @@ namespace lbAbiAmd64SysV {
namespace lbAbiArm64 {
Array<lbArgType> compute_arg_types(LLVMContextRef c, LLVMTypeRef *arg_types, unsigned arg_count);
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined);
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type);
bool is_homogenous_aggregate(LLVMContextRef c, LLVMTypeRef type, LLVMTypeRef *base_type_, unsigned *member_count_);
LB_ABI_INFO(abi_info) {
lbFunctionType *ft = gb_alloc_item(permanent_allocator(), lbFunctionType);
ft->ctx = c;
ft->ret = compute_return_type(c, return_type, return_is_defined);
ft->ret = compute_return_type(ft, c, return_type, return_is_defined, return_is_tuple);
ft -> args = compute_arg_types(c, arg_types, arg_count);
ft->calling_convention = calling_convention;
return ft;
@@ -1070,27 +1095,29 @@ namespace lbAbiArm64 {
return (member_count <= 4);
}
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef type, bool return_is_defined) {
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type) {
LLVMTypeRef homo_base_type = nullptr;
unsigned homo_member_count = 0;
if (!return_is_defined) {
return lb_arg_type_direct(LLVMVoidTypeInContext(c));
} else if (is_register(type)) {
return non_struct(c, type);
} else if (is_homogenous_aggregate(c, type, &homo_base_type, &homo_member_count)) {
} else if (is_register(return_type)) {
return non_struct(c, return_type);
} else if (is_homogenous_aggregate(c, return_type, &homo_base_type, &homo_member_count)) {
if (is_homogenous_aggregate_small_enough(homo_base_type, homo_member_count)) {
return lb_arg_type_direct(type, LLVMArrayType(homo_base_type, homo_member_count), nullptr, nullptr);
return lb_arg_type_direct(return_type, LLVMArrayType(homo_base_type, homo_member_count), nullptr, nullptr);
} else {
//TODO(Platin): do i need to create stuff that can handle the diffrent return type?
// else this needs a fix in llvm_backend_proc as we would need to cast it to the correct array type
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
//LLVMTypeRef array_type = LLVMArrayType(homo_base_type, homo_member_count);
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", type);
return lb_arg_type_indirect(type, attr);
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
}
} else {
i64 size = lb_sizeof(type);
i64 size = lb_sizeof(return_type);
if (size <= 16) {
LLVMTypeRef cast_type = nullptr;
if (size <= 1) {
@@ -1105,10 +1132,12 @@ namespace lbAbiArm64 {
unsigned count = cast(unsigned)((size+7)/8);
cast_type = LLVMArrayType(LLVMInt64TypeInContext(c), count);
}
return lb_arg_type_direct(type, cast_type, nullptr, nullptr);
return lb_arg_type_direct(return_type, cast_type, nullptr, nullptr);
} else {
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", type);
return lb_arg_type_indirect(type, attr);
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
}
}
}
@@ -1160,7 +1189,7 @@ namespace lbAbiWasm {
registers/arguments if possible rather than by pointer.
*/
Array<lbArgType> compute_arg_types(LLVMContextRef c, LLVMTypeRef *arg_types, unsigned arg_count);
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined);
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type);
enum {MAX_DIRECT_STRUCT_SIZE = 32};
@@ -1168,7 +1197,7 @@ namespace lbAbiWasm {
lbFunctionType *ft = gb_alloc_item(permanent_allocator(), lbFunctionType);
ft->ctx = c;
ft->args = compute_arg_types(c, arg_types, arg_count);
ft->ret = compute_return_type(c, return_type, return_is_defined);
ft->ret = compute_return_type(ft, c, return_type, return_is_defined, return_is_tuple);
ft->calling_convention = calling_convention;
return ft;
}
@@ -1260,7 +1289,7 @@ namespace lbAbiWasm {
return args;
}
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef return_type, bool return_is_defined) {
LB_ABI_COMPUTE_RETURN_TYPE(compute_return_type) {
if (!return_is_defined) {
return lb_arg_type_direct(LLVMVoidTypeInContext(c));
} else if (lb_is_type_kind(return_type, LLVMStructTypeKind) || lb_is_type_kind(return_type, LLVMArrayTypeKind)) {
@@ -1275,6 +1304,9 @@ namespace lbAbiWasm {
case 4: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 32), nullptr, nullptr);
case 8: return lb_arg_type_direct(return_type, LLVMIntTypeInContext(c, 64), nullptr, nullptr);
}
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
}