diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 98eb804..c5d8435 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -5990,9 +5990,12 @@ expand_ifn_atomic_compare_exchange_into_call (gcall *call, machine_mode mode) /* Skip the boolean weak parameter. */ for (z = 4; z < 6; z++) vec->quick_push (gimple_call_arg (call, z)); + /* At present we only have BUILT_IN_ATOMIC_COMPARE_EXCHANGE_{1,2,4,8,16}. */ + unsigned int bytes_log2 = exact_log2 (GET_MODE_SIZE (mode)); + gcc_assert (bytes_log2 < 5); built_in_function fncode = (built_in_function) ((int) BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1 - + exact_log2 (GET_MODE_SIZE (mode))); + + bytes_log2); tree fndecl = builtin_decl_explicit (fncode); tree fn = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fndecl)), fndecl); |