diff options
Diffstat (limited to 'src/llvm_backend_utility.cpp')
| -rw-r--r-- | src/llvm_backend_utility.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/llvm_backend_utility.cpp b/src/llvm_backend_utility.cpp index 182928247..c7b4170e9 100644 --- a/src/llvm_backend_utility.cpp +++ b/src/llvm_backend_utility.cpp @@ -981,9 +981,12 @@ gb_internal lbStructFieldRemapping lb_get_struct_remapping(lbModule *m, Type *t) mutex_lock(&m->types_mutex); - auto *field_remapping = map_get(&m->struct_field_remapping, cast(void *)struct_type); + // NOTE(jakub): It's very important to check the type pointer first, + // because two disctinct but similar structs can end up with the same LLVMTypeRef after interning. + // (For example struct{u16,u8} looks identical to LLVM as struct{u16,u8,u8} once padding fields are inserted.) + auto *field_remapping = map_get(&m->struct_field_remapping, cast(void *)t); if (field_remapping == nullptr) { - field_remapping = map_get(&m->struct_field_remapping, cast(void *)t); + field_remapping = map_get(&m->struct_field_remapping, cast(void *)struct_type); } mutex_unlock(&m->types_mutex); |