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This adds code which checks how big the return is and if it is to big returns the value via sret

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Platin21
2021-12-27 22:10:52 +01:00
parent eec61c3f6f
commit 86f831ddd1
1 changed files with 14 additions and 1 deletions
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15
src/llvm_abi.cpp
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@@ -965,6 +965,10 @@ namespace lbAbiArm64 {
}
return false;
}
unsigned is_homogenous_aggregate_small_enough(LLVMTypeRef *base_type_, unsigned member_count_) {
return (member_count_ <= 4);
}
lbArgType compute_return_type(LLVMContextRef c, LLVMTypeRef type, bool return_is_defined) {
LLVMTypeRef homo_base_type = {};
@@ -975,7 +979,16 @@ namespace lbAbiArm64 {
} else if (is_register(type)) {
return non_struct(c, type);
} else if (is_homogenous_aggregate(c, type, &homo_base_type, &homo_member_count)) {
return lb_arg_type_direct(type, LLVMArrayType(homo_base_type, homo_member_count), nullptr, nullptr);
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);
} 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
//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);
}
} else {
i64 size = lb_sizeof(type);
if (size <= 16) {