1. There are failed LIT tests at the moment due to type inference
errors.
```
Failed Tests (3):
LLVM :: CodeGen/SPIRV/pointers/ptr-eq-types.ll
LLVM :: CodeGen/SPIRV/validate/sycl-hier-par-basic.ll
LLVM :: CodeGen/SPIRV/validate/sycl-tangle-group-algorithms.ll
```
This PR improves type inference to fix the errors.
2. The following tests start passing:
```
Unexpectedly Passed Tests (2):
LLVM :: CodeGen/SPIRV/pointers/resource-addrspacecast-2.ll
LLVM :: CodeGen/SPIRV/pointers/resource-addrspacecast.ll
```
This PR removes XFAILS in those two test cases.
8bd35ca412