areusch commented on a change in pull request #6917:
URL: https://github.com/apache/incubator-tvm/pull/6917#discussion_r528404631
##########
File path: src/target/llvm/codegen_llvm.cc
##########
@@ -184,6 +188,104 @@ void CodeGenLLVM::AddFunctionInternal(const PrimFunc& f,
bool ret_void) {
}
}
+void CodeGenLLVM::LinkParameters(const Map<String, LinkedParam> params) {
+ // It would be nice to de-dupe these declarations frm
src/tir/transforms/make_packed_api.cc,
+ // but they are at a different layer in the compiler...
+ std::vector<llvm::Type*> param_types;
+ // args
+ param_types.push_back(t_void_->getPointerTo(GetGlobalAddressSpace()));
+ // tcodes
+ param_types.push_back(t_int_->getPointerTo(GetGlobalAddressSpace()));
+ // num_args
+ param_types.push_back(t_int_);
+ // ret_args
+ param_types.push_back(t_void_->getPointerTo(GetGlobalAddressSpace()));
+ // ret_tcodes
+ param_types.push_back(t_int_->getPointerTo(GetGlobalAddressSpace()));
+ // resource_handle
+ param_types.push_back(t_void_->getPointerTo(GetGlobalAddressSpace()));
+
+ // TODO(tvm-team):
+ // Update the function type to respect the ret_type field of f.
+ // Once we allow more flexibility in the PrimFunc.
+ llvm::FunctionType* ftype = llvm::FunctionType::get(t_int_, param_types,
false);
+
+ llvm::Function* function =
+ llvm::Function::Create(ftype, llvm::Function::ExternalLinkage,
+ ::tvm::runtime::symbol::tvm_lookup_linked_param,
module_.get());
+ function->setCallingConv(llvm::CallingConv::C);
+
function->setDLLStorageClass(llvm::GlobalValue::DLLStorageClassTypes::DLLExportStorageClass);
+
+ llvm::BasicBlock* entry = llvm::BasicBlock::Create(*ctx_, "entry", function);
+ builder_->SetInsertPoint(entry);
+ std::vector<llvm::Value*> zero_index_list{llvm::ConstantInt::get(t_int32_,
0)};
+ std::vector<llvm::Value*>
zero_array_index_list{llvm::ConstantInt::get(t_int32_, 0),
+
llvm::ConstantInt::get(t_int32_, 0)};
+ auto args_array = builder_->CreateBitCast(
+#if TVM_LLVM_VERSION >= 50
+ &function->arg_begin()[0],
+#else
+ &(*(function->arg_begin())),
+#endif
+ llvm::ArrayType::get(t_void_->getPointerTo(GetGlobalAddressSpace()), 1));
+ llvm::Value* sid = builder_->CreateBitCast(
+ builder_->CreateLoad(t_void_->getPointerTo(GetGlobalAddressSpace()),
+ builder_->CreateInBoundsGEP(args_array,
zero_index_list)),
+ t_int64_);
+
+ llvm::BasicBlock* default_block = llvm::BasicBlock::Create(*ctx_,
"default_block", function);
+ llvm::SwitchInst* switch_inst = builder_->CreateSwitch(sid, default_block,
params.size() + 1);
+
+ builder_->SetInsertPoint(default_block);
+ {
+ auto ret_types_array = builder_->CreateBitCast(
+#if TVM_LLVM_VERSION >= 50
+ &function->arg_begin()[4],
+#else
+ &(*(std::next(function->arg_begin(), 4))),
+#endif
+ llvm::ArrayType::get(t_int_, 1)->getPointerTo());
+
+ builder_->CreateStore(llvm::ConstantInt::get(t_int_, kTVMNullptr),
+ builder_->CreateGEP(ret_types_array,
zero_array_index_list));
Review comment:
done
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