isl_ast_codegen.c: remove dependence on internals of isl_constraint_list

[platform/upstream/isl.git] / isl_mat.c

diff --git a/isl_mat.c b/isl_mat.c
index 16a79f7..5290dea 100644 (file)
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -204,19 +204,21 @@ struct isl_mat *isl_mat_cow(struct isl_mat *mat)
        return mat2;
 }
 
-void isl_mat_free(struct isl_mat *mat)
+void *isl_mat_free(struct isl_mat *mat)
 {
        if (!mat)
-               return;
+               return NULL;
 
        if (--mat->ref > 0)
-               return;
+               return NULL;
 
        if (!ISL_F_ISSET(mat, ISL_MAT_BORROWED))
                isl_blk_free(mat->ctx, mat->block);
        isl_ctx_deref(mat->ctx);
        free(mat->row);
        free(mat);
+
+       return NULL;
 }
 
 int isl_mat_rows(__isl_keep isl_mat *mat)
@@ -967,7 +969,8 @@ struct isl_mat *isl_mat_swap_rows(struct isl_mat *mat, unsigned i, unsigned j)
        return mat;
 }
 
-struct isl_mat *isl_mat_product(struct isl_mat *left, struct isl_mat *right)
+__isl_give isl_mat *isl_mat_product(__isl_take isl_mat *left,
+       __isl_take isl_mat *right)
 {
        int i, j, k;
        struct isl_mat *prod;