fc81e36242
[nll] teach SCC about `'static`
r? @nikomatsakis
I think this is right? I am seeing better performance on the `html5ever` benchmark but I'd like a perf run to quantify the exact speedup. There's a few ui tests failing due to changes in the error messages. The main issue seems to be that returns aren't being detected correctly?
`mir_check_cast_unsize.rs` before:
```
error: unsatisfied lifetime constraints
--> mir_check_cast_unsize.rs:17:46
|
17 | fn bar<'a>(x: &'a u32) -> &'static dyn Debug {
| ________--____________________________________^
| | |
| | lifetime `'a` defined here
18 | | //~^ ERROR unsatisfied lifetime constraints
19 | | x
20 | | //~^ WARNING not reporting region error due to nll
21 | | }
| |_^ return requires that `'a` must outlive `'static`
```
`mir_check_cast_unsize.rs` after:
```
error: unsatisfied lifetime constraints
--> mir_check_cast_unsize.rs:19:5
|
17 | fn bar<'a>(x: &'a u32) -> &'static dyn Debug {
| -- lifetime `'a` defined here
18 | //~^ ERROR unsatisfied lifetime constraints
19 | x
| ^ cast requires that `'a` must outlive `'static`
```
|
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| .. | ||
| auxiliary | ||
| codegen | ||
| codegen-units | ||
| compile-fail | ||
| compile-fail-fulldeps | ||
| debuginfo | ||
| incremental | ||
| incremental-fulldeps | ||
| mir-opt | ||
| parse-fail | ||
| pretty | ||
| run-fail | ||
| run-fail-fulldeps | ||
| run-make | ||
| run-make-fulldeps | ||
| run-pass | ||
| run-pass-fulldeps | ||
| run-pass-valgrind | ||
| rustdoc | ||
| rustdoc-js | ||
| rustdoc-ui | ||
| rustfix | ||
| ui | ||
| ui-fulldeps | ||
| COMPILER_TESTS.md | ||