revert a change to lower_tvm_builtin.cc from apache#6126

mbrookhart · Jul 28, 2021 · 6c65f7a · 6c65f7a
1 parent a17ee9f
commit 6c65f7a
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/src/tir/transforms/lower_tvm_builtin.cc b/src/tir/transforms/lower_tvm_builtin.cc
@@ -104,6 +104,16 @@ class BuiltinLower : public StmtExprMutator {
     op = stmt.as<AllocateNode>();
     // Get constant allocation bound.
     int64_t nbytes = GetVectorBytes(op->dtype);
+    if (device_type_.defined()) {
+      if (const auto* dev_type = device_type_.as<IntImmNode>()) {
+        if (dev_type->value == kDLCPU) {
+          int32_t constant_size = op->constant_allocation_size();
+          if (constant_size > 0 && constant_size * nbytes < runtime::kMaxStackAlloca) {
+            return stmt;
+          }
+        }
+      }
+    }
     PrimExpr total_bytes = make_const(op->extents[0].dtype(), nbytes);
     for (size_t i = 0; i < op->extents.size(); ++i) {
       total_bytes = total_bytes * op->extents[i];