diff options
Diffstat (limited to 'gcc/tree-gimple.c')
| -rw-r--r-- | gcc/tree-gimple.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/tree-gimple.c b/gcc/tree-gimple.c index 84005aad..4a31c0e 100644 --- a/gcc/tree-gimple.c +++ b/gcc/tree-gimple.c @@ -111,9 +111,12 @@ is_gimple_reg_rhs (tree t) bool is_gimple_mem_rhs (tree t) { - /* If we're dealing with a renamable type, either source or dest - must be a renamed variable. */ - if (is_gimple_reg_type (TREE_TYPE (t))) + /* If we're dealing with a renamable type, either source or dest must be + a renamed variable. Also force a temporary if the type doesn't need + to be stored in memory, since it's cheap and prevents erroneous + tailcalls (PR 17526). */ + if (is_gimple_reg_type (TREE_TYPE (t)) + || TYPE_MODE (TREE_TYPE (t)) != BLKmode) return is_gimple_val (t); else return is_gimple_formal_tmp_rhs (t); |