| Message ID | 0040c135ed9015aab2237543e2c1c91d22decc7e.1593026638.git.segher@kernel.crashing.org |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] simplify-rtx: Parity of parity is parity | expand |
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 28c2dc6..65008ea 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1391,6 +1391,10 @@ simplify_unary_operation_1 (enum rtx_code code, machine_mode mode, rtx op) GET_MODE (XEXP (op, 0))); break; + case PARITY: + /* (parity (parity x)) -> parity (x). */ + return op; + default: break; }
From: Roger Sayle <roger@nextmovesoftware.com> 2020-06-24 Roger Sayle <roger@nextmovesoftware.com> * simplify-rtx.c (simplify_unary_operation_1): Simplify (parity (parity x)) as (parity x), i.e. PARITY is idempotent. --- gcc/simplify-rtx.c | 4 ++++ 1 file changed, 4 insertions(+)