未验证 提交 e525aa23 编写于 作者: X Xin Pan 提交者: GitHub

Merge pull request #12780 from panyx0718/ir4

fix ProgramToGraph
......@@ -117,7 +117,15 @@ Graph::Graph(const ProgramDesc &program) : program_(program) {
}
// For output args, always create a new var.
for (auto &each_var_name : op->OutputArgumentNames()) {
ir::Node *var = CreateVarNode(all_vars.at(each_var_name));
ir::Node *var = nullptr;
if (all_vars.count(each_var_name) != 0) {
var = CreateVarNode(all_vars.at(each_var_name));
} else {
// Operation output vars can be @EMPTY@. For example, while_grad
// can have multi @EMPTY@ outputs with no VarDesc.
// TODO(panyx0718): Add a test.
var = CreateEmptyNode(each_var_name, ir::Node::Type::kVariable);
}
var_nodes[each_var_name].push_back(var);
node->outputs.push_back(var);
var->inputs.push_back(node);
......@@ -208,7 +216,8 @@ Graph::Graph(const ProgramDesc &program) : program_(program) {
// Add write after write dependence
ir::Node *upstream_op =
(*it_old)->inputs.empty() ? nullptr : (*it_old)->inputs[0];
if (upstream_op) {
// TODO(zcd): Add a test.
if (upstream_op && upstream_op != write_op) {
ir::Node *dep_var = CreateControlDepVar();
write_op->inputs.push_back(dep_var);
upstream_op->outputs.push_back(dep_var);
......
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