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i128 unwrap aggregate single member structs

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kalsprite
2026-08-12 23:29:48 -07:00
parent 1638bd7e9c
commit b92e8af434
1 changed files with 8 additions and 2 deletions
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10
src/llvm_abi.cpp
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@@ -724,16 +724,22 @@ namespace lbAbiAmd64SysV {
}
gb_internal bool is_aggregate(LLVMTypeRef type) {
// A single-member wrapper is passed like its member, but only while that
// member still fits one eightbyte. `struct{i128}` needs two registers and
// goes to memory when they are gone, where a bare `i128` does not -- clang
// emits `byval align 16` for the struct and a plain `i128` for the scalar.
LLVMTypeKind kind = LLVMGetTypeKind(type);
switch (kind) {
case LLVMStructTypeKind:
if (LLVMCountStructElementTypes(type) == 1) {
return is_aggregate(LLVMStructGetTypeAtIndex(type, 0));
LLVMTypeRef elem = LLVMStructGetTypeAtIndex(type, 0);
return lb_sizeof(elem) > 8 || is_aggregate(elem);
}
return true;
case LLVMArrayTypeKind:
if (LLVMGetArrayLength(type) == 1) {
return is_aggregate(LLVMGetElementType(type));
LLVMTypeRef elem = OdinLLVMGetArrayElementType(type);
return lb_sizeof(elem) > 8 || is_aggregate(elem);
}
return true;
}