[autodiff] Fix nullptr during adjoint codegen (#4771)

taichi-dev · Apr 12, 2022 · e675ddc · e675ddc
1 parent a995a91
commit e675ddc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/taichi/transforms/auto_diff.cpp b/taichi/transforms/auto_diff.cpp
@@ -656,6 +656,7 @@ class MakeAdjoint : public IRVisitor {
       //     for _ in range(5)
       //         q += a[i]
       if (stmt->is<GlobalLoadStmt>() &&
+          (stmt->parent->parent_stmt != nullptr) &&
           stmt->parent->parent_stmt->is<RangeForStmt>()) {
         // Check whether this GlobalLoadStmt is in the body of a for-loop by
         // searching in the backup forward pass If not (Case 1), the alloca