| Issue |
136059
|
| Summary |
[CIR] Upstream union support
|
| Labels |
ClangIR
|
| Assignees |
|
| Reporter |
andykaylor
|
### Overview
Upstream support for union types. This will build on the existing record type support, but unions have special layout requirements and need extra handling during lowering to LLVM IR.
### Suggested minimal test case
```
union U {
int n;
char c;
};
int f() {
U u;
return u.n;
}
```
### Existing incubator tests
clang/test/CIR/CodeGen/union.cpp
clang/test/CIR/CodeGen/union-array.c
clang/test/CIR/CodeGen/union-init.c
clang/test/CIR/CodeGen/union-padding.c
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