Wenju He 1ffff05a38
[clang][SPIR][SPIRV] Materialize non-generic null pointers via addrspacecast (#161773)
LLVM models ConstantPointerNull as all-zero, but some GPUs (e.g. AMDGPU
and our downstream GPU target) use a non-zero sentinel for null in
private / local address spaces.
SPIR-V is a supported input for our GPU target. This PR preserves a
canonical zero form in the generic AS while allowing later lowering to
substitute the target’s real sentinel.
2025-10-09 09:10:24 +08:00
..