Bump mir-opt-level up 2 to 3 and 3 to 4

fixed/67019.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc +nightly --edition 2018 -Z mir-opt-level=2 - << EOF
+rustc +nightly --edition 2018 -Z mir-opt-level=3 - << EOF
 fn test(this: ((u8, u8),)) {
     assert!((this.0).1 == 0);
 }

fixed/68296.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Zmir-opt-level=2 - << END
+rustc -Zmir-opt-level=3 - << END
 const FOO: *const u32 = { //~ ERROR any use of this value will cause an error
     let x = 42;
     &x

fixed/68841.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 --edition 2018 - << END
+rustc -Z mir-opt-level=3 --edition 2018 - << END
 #![feature(async_closure)]
 
 use std::future::Future;

fixed/71793.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc +nightly --edition 2018 -Z mir-opt-level=2 - << EOF
+rustc +nightly --edition 2018 -Z mir-opt-level=3 - << EOF
 pub async fn connect() {}
 pub fn block_on<F: std::future::Future>(_: F) {}
 fn main() {

fixed/72181.sh

@@ -19,4 +19,4 @@ fn main() {
 
 EOF
 
-rustc -Zmir-opt-level=2 --emit=mir 72181.rs
+rustc -Zmir-opt-level=3 --emit=mir 72181.rs

fixed/72285.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=3 - << EOF
+rustc -Z mir-opt-level=4 - << EOF
 
 fn main() {
     let i = (0..usize::max_value()).chain(0..10).skip(usize::max_value());

fixed/72372.sh

@@ -8,4 +8,4 @@ fn main() {
 
 EOF
 
-rustc -Zmir-opt-level=2 72372.rs
+rustc -Zmir-opt-level=3 72372.rs

fixed/72679.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 - << EOF
+rustc -Z mir-opt-level=3 - << EOF
 
 #![cfg_attr(const_fn, feature(const_fn))]
 

fixed/73327.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 - << EOF
+rustc -Z mir-opt-level=3 - << EOF
 
 fn load<R>(_r: R) {}
 

fixed/75053.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Zmir-opt-level=2 - << EOF
+rustc -Zmir-opt-level=3 - << EOF
 #![feature(type_alias_impl_trait)]
 
 use std::marker::PhantomData;

fixed/75299.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=3 - << EOF
+rustc -Z mir-opt-level=4 - << EOF
 #![feature(const_generics, box_syntax)]
 #![allow(incomplete_features)]
 

fixed/76375.sh

@@ -29,5 +29,5 @@ pub async fn h() {}
 
 EOF
 
-rustc --edition=2018 -Zmir-opt-level=2 -Zunsound-mir-opts x.rs
-rustc --edition=2018 -Zmir-opt-level=2 y.rs --extern x -L.
+rustc --edition=2018 -Zmir-opt-level=3 -Zunsound-mir-opts x.rs
+rustc --edition=2018 -Zmir-opt-level=3 y.rs --extern x -L.

fixed/77911.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 - << EOF
+rustc -Z mir-opt-level=3 - << EOF
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 

fixed/78442.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 - << EOF
+rustc -Z mir-opt-level=3 - << EOF
 #![crate_type = "lib"]
 
 // Error won't happen if "bar" is not generic

fixed/80060.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc -Z mir-opt-level=2 -Z instrument-coverage - <<EOF
+rustc -Z mir-opt-level=3 -Z instrument-coverage - <<EOF
 pub fn main() {
     let c = || {};
     c();

ices/73021.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc --emit mir -Z mir-opt-level=2 - <<EOF
+rustc --emit mir -Z mir-opt-level=3 - <<EOF
 // build-pass
 #![allow(dead_code)]
 trait Foo {

ices/81403.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-rustc --emit=mir -Zmir-opt-level=2 - <<'EOF'
+rustc --emit=mir -Zmir-opt-level=3 - <<'EOF'
 // build-pass
 pub trait Foo<'a> {
     type Bar;