diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 68df170b600..515b75220a1 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -727,9 +727,26 @@ expand_builtin_prefetch (arglist) tree arg0, arg1, arg2; rtx op0, op1, op2; + if (!validate_arglist (arglist, POINTER_TYPE, 0)) + return; + arg0 = TREE_VALUE (arglist); - arg1 = TREE_VALUE (TREE_CHAIN (arglist)); - arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); + /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to + zero (read) and argument 2 (locality) defaults to 3 (high degree of + locality). */ + if (TREE_CHAIN (arglist)) + { + arg1 = TREE_VALUE (TREE_CHAIN (arglist)); + if (TREE_CHAIN (TREE_CHAIN (arglist))) + arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); + else + arg2 = build_int_2 (3, 0); + } + else + { + arg1 = integer_zero_node; + arg2 = build_int_2 (3, 0); + } /* Argument 0 is an address. */ op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL); |