fix DiagEmbedInferMeta when x_dims contains -1 (#63961)

Signed-off-by: ZelinMa557 <3388706467@qq.com>

paddle/phi/infermeta/unary.cc

@@ -840,7 +840,9 @@ void DiagEmbedInferMeta(
                         dim1,
                         dim2));
 
-  int new_dim_len = static_cast<int>(offset_ + x_dims[x_dims.size() - 1]);
+  int x_last_dim = x_dims[x_dims.size() - 1];
+  int new_dim_len =
+      (x_last_dim == -1) ? -1 : static_cast<int>(offset_ + x_last_dim);
   auto sizes = common::vectorize(x_dims);
   sizes.pop_back();
   sizes.insert(sizes.begin() + std::min(dim1_, dim2_), new_dim_len);
@@ -3653,7 +3655,7 @@ void RepeatInterleaveInferMeta(const MetaTensor& x,
       phi::errors::InvalidArgument(
           "repeat_interleave's output tensor can't be nullptr"));
 
-  output_dim[n_dim] = input_dim[n_dim] * repeats;
+  if (input_dim[n_dim] != -1) output_dim[n_dim] = input_dim[n_dim] * repeats;
   out->set_dims(common::make_ddim(output_dim));
   out->share_lod(x);
   out->set_dtype(x.dtype());