fix slice compute bug (#68698)

phlrain · web-flow · commit 3eddd2ae9ce0 · 2024-10-15T10:18:49.000+08:00
diff --git a/paddle/cinn/hlir/pe/transform.cc b/paddle/cinn/hlir/pe/transform.cc
@@ -1342,7 +1342,7 @@ ir::Tensor SliceSymbolic(const ir::Tensor& A,
                  });
 
   for (int i = 0; i < axes.size(); i++) {
-    if (input_shape[axes[i]].is_constant()) {
+    if (input_shape[axes[i]].is_constant() && new_starts[i].is_constant()) {
       if (new_starts[i].as_int64() < -input_shape[axes[i]].as_int64()) {
         new_starts[i] = ir::Expr(0);
       } else if (new_starts[i].as_int64() < 0) {
