llvm-project

ca1efd90 - [NFCI] Use `DataLayout::getNullPtrValue` in codegen and analysis paths

[NFCI] Use `DataLayout::getNullPtrValue` in codegen and analysis paths Replace hardcoded 0 for null pointer materialization with `DataLayout::getNullPtrValue(AS)` across codegen, analysis, and transform paths. This prepares these paths for a future semantic change where `ConstantPointerNull` may represent a non-zero null pointer value on certain targets. NFC because all address spaces currently have all-zero null pointer values, so `getNullPtrValue` returns 0 for every address space.