================
@@ -285,6 +289,20 @@ void
NVPTXTargetCodeGenInfo::addNVVMMetadata(llvm::GlobalValue *GV,
bool NVPTXTargetCodeGenInfo::shouldEmitStaticExternCAliases() const {
return false;
}
+
+llvm::Constant *
+NVPTXTargetCodeGenInfo::getNullPointer(const CodeGen::CodeGenModule &CGM,
+ llvm::PointerType *PT,
+ QualType QT) const {
+ auto &Ctx = CGM.getContext();
+ if (PT->getAddressSpace() != Ctx.getTargetAddressSpace(LangAS::opencl_local))
+ return llvm::ConstantPointerNull::get(PT);
+
+ auto NPT = llvm::PointerType::get(
+ PT->getContext(), Ctx.getTargetAddressSpace(LangAS::opencl_generic));
+ return llvm::ConstantExpr::getAddrSpaceCast(
+ llvm::ConstantPointerNull::get(NPT), PT);
+}
----------------
arsenm wrote:
"The semantics of non-zero address spaces are target-specific. Memory access
through a non-dereferenceable pointer is undefined behavior in any address
space. Pointers with the bit-value 0 are only assumed to be non-dereferenceable
in address space 0, unless the function is marked with the
null_pointer_is_valid attribute."
https://github.com/llvm/llvm-project/pull/78759
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