diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index f8756040ce0..03fbc750dcf 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2428,6 +2428,19 @@ simplify_binary_operation_1 (enum rtx_code code, enum machine_mode mode, return simplify_gen_binary (code, mode, tem, op1); } } + + /* (and X (ior (not X) Y) -> (and X Y) */ + if (GET_CODE (op1) == IOR + && GET_CODE (XEXP (op1, 0)) == NOT + && op0 == XEXP (XEXP (op1, 0), 0)) + return simplify_gen_binary (AND, mode, op0, XEXP (op1, 1)); + + /* (and (ior (not X) Y) X) -> (and X Y) */ + if (GET_CODE (op0) == IOR + && GET_CODE (XEXP (op0, 0)) == NOT + && op1 == XEXP (XEXP (op0, 0), 0)) + return simplify_gen_binary (AND, mode, op1, XEXP (op0, 1)); + tem = simplify_associative_operation (code, mode, op0, op1); if (tem) return tem; |