further bless tests.

2020-06-13T19:50:30+00:00

Modify SimplifyArmIdentity so it can trigger on mir-opt-level=1

2020-05-12T00:31:02+00:00

I also added test cases to make sure the optimization can fire on all of these cases: ```rust fn case_1(o: Option) -> Option { match o { Some(u) => Some(u), None => None, } } fn case2(r: Result) -> Result { match r { Ok(u) => Ok(u), Err(i) => Err(i), } } fn case3(r: Result) -> Result { let u = r?; Ok(u) } ``` Without MIR inlining, this still does not completely optimize away the `?` operator because the `Try::into_result()`, `From::from()` and `Try::from_error()` calls still exist. This does move us a bit closer to that goal though because: - We can now run the pass on mir-opt-level=1 - We no longer depend on the copy propagation pass running which is unlikely to stabilize anytime soon.

Bless mir-opt tests

2020-05-09T09:51:39+00:00

Emit basic block ids for statements and terminators in MIR only in -Zverbose mode

2020-04-27T13:16:12+00:00

Normalize away pairs of line:col numbers.

2020-04-07T17:49:14+00:00

--bless all mir-opt tests.