diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index a1bba0d7160..fd6d0b859e0 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -5988,6 +5988,50 @@ expand_builtin_sync_operation (enum machine_mode mode, tree exp, rtx val, mem; enum machine_mode old_mode; + if (code == NOT && warn_sync_nand) + { + tree fndecl = get_callee_fndecl (exp); + enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); + + static bool warned_f_a_n, warned_n_a_f; + + switch (fcode) + { + case BUILT_IN_FETCH_AND_NAND_1: + case BUILT_IN_FETCH_AND_NAND_2: + case BUILT_IN_FETCH_AND_NAND_4: + case BUILT_IN_FETCH_AND_NAND_8: + case BUILT_IN_FETCH_AND_NAND_16: + + if (warned_f_a_n) + break; + + fndecl = implicit_built_in_decls[BUILT_IN_FETCH_AND_NAND_N]; + inform (input_location, + "%qD changed semantics in GCC 4.4", fndecl); + warned_f_a_n = true; + break; + + case BUILT_IN_NAND_AND_FETCH_1: + case BUILT_IN_NAND_AND_FETCH_2: + case BUILT_IN_NAND_AND_FETCH_4: + case BUILT_IN_NAND_AND_FETCH_8: + case BUILT_IN_NAND_AND_FETCH_16: + + if (warned_n_a_f) + break; + + fndecl = implicit_built_in_decls[BUILT_IN_NAND_AND_FETCH_N]; + inform (input_location, + "%qD changed semantics in GCC 4.4", fndecl); + warned_n_a_f = true; + break; + + default: + gcc_unreachable (); + } + } + /* Expand the operands. */ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |