Merge `Promoted` and `Static` in `mir::Place` #59232

saleemjaffer · 2019-03-16T12:13:12Z

fixes #53848

rust-highfive · 2019-03-16T12:13:15Z

r? @davidtwco

(rust_highfive has picked a reviewer for you, use r? to override)

saleemjaffer · 2019-03-16T12:13:36Z

r? @oli-obk

src/librustc/mir/visit.rs

src/librustc_mir/borrow_check/error_reporting.rs

src/librustc_mir/borrow_check/mod.rs

src/librustc_mir/borrow_check/mutability_errors.rs

src/librustc_mir/borrow_check/nll/type_check/mod.rs

src/librustc_mir/borrow_check/place_ext.rs

src/librustc_mir/borrow_check/places_conflict.rs

src/librustc_mir/interpret/place.rs

src/librustc_mir/transform/check_unsafety.rs

src/librustc_mir/transform/const_prop.rs

src/librustc_mir/transform/inline.rs

src/librustc_mir/transform/qualify_consts.rs

src/librustc_mir/borrow_check/mod.rs

src/librustc_mir/borrow_check/nll/type_check/mod.rs

src/librustc_mir/borrow_check/place_ext.rs

src/librustc_mir/transform/qualify_consts.rs

oli-obk · 2019-03-17T08:18:27Z

note that you need to rebase over the master branch, since there are merge conflicts

saleemjaffer · 2019-03-17T08:24:29Z

@oli-obk #53848 (comment)

Not sure how to get the DefId of the current function. Any tips?

oli-obk · 2019-03-17T08:52:08Z

You can add a new DefId field to the Promoter type. Whereever Promoted objects are created, you can fill in the field with the current function's DefId

saleemjaffer · 2019-03-17T14:23:48Z

you can fill in the field with the current function's DefId

I am stuck with figuring out how to obtain the current function's DefId :(

rust-highfive · 2019-03-23T15:20:03Z

The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:2f7af79f:start=1553352610681796655,finish=1553352685026031560,duration=74344234905
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
$ export GCP_CACHE_BUCKET=rust-lang-ci-cache
Setting environment variables from .travis.yml
---
[00:28:04]    Compiling rustc_asan v0.0.0 (/checkout/src/librustc_asan)
[00:28:04]    Compiling rustc_msan v0.0.0 (/checkout/src/librustc_msan)
[00:28:05]    Compiling rustc_tsan v0.0.0 (/checkout/src/librustc_tsan)
[00:28:05]    Compiling rustc_lsan v0.0.0 (/checkout/src/librustc_lsan)
[00:28:24] error: internal compiler error: src/librustc_mir/borrow_check/nll/mod.rs:354: region is not an ReVar: ReStatic
[00:28:24] thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:634:9
[00:28:24] note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
[00:28:24] error: aborting due to previous error
[00:28:24] 
[00:28:24] 
[00:28:24] 
[00:28:24] note: the compiler unexpectedly panicked. this is a bug.
[00:28:24] 
[00:28:24] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[00:28:24] 
[00:28:24] note: rustc 1.35.0-dev running on x86_64-unknown-linux-gnu
[00:28:24] 
[00:28:24] note: compiler flags: -Z external-macro-backtrace -Z force-unstable-if-unmarked -C opt-level=2 -C prefer-dynamic -C debug-assertions=y -C codegen-units=1 -C link-args=-Wl,-rpath,$ORIGIN/../lib --crate-type lib
[00:28:24] note: some of the compiler flags provided by cargo are hidden
[00:28:24] 
[00:28:25] error: Could not compile `core`.
[00:28:25] 
---
travis_time:end:274e8e4a:start=1553354400212355337,finish=1553354400219776250,duration=7420913
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:106db90c
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:0b51f4bc
travis_time:start:0b51f4bc
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

src/librustc/mir/visit.rs

src/librustc_mir/borrow_check/mod.rs

src/librustc_mir/borrow_check/nll/type_check/mod.rs

src/librustc_mir/borrow_check/places_conflict.rs

src/librustc_mir/build/expr/as_place.rs

src/librustc_mir/transform/promote_consts.rs

src/librustc_mir/transform/qualify_consts.rs

saleemjaffer · 2019-03-24T05:27:31Z

Fixed everything.

oli-obk · 2019-03-25T22:06:08Z

@bors r+

Thanks!

bors · 2019-03-25T22:06:10Z

📌 Commit fb93f10 has been approved by oli-obk

…oli-obk Merge `Promoted` and `Static` in `mir::Place` fixes rust-lang#53848

RalfJung · 2019-03-26T09:45:56Z

src/librustc_mir/interpret/place.rs

-                assert!(!static_.ty.needs_subst());
-                let layout = self.layout_of(static_.ty)?;
-                let instance = ty::Instance::mono(*self.tcx, static_.def_id);
+            Base(PlaceBase::Static(box Static { kind: StaticKind::Static(def_id), ty })) => {


Why do these cases need to be handled so differently here? I somewhat hoped they'd get more uniform though this PR.

To get this resolved we'll need to either teach intern_static about promoteds (which opens up a whole can of worms since we'd need to put a GlobalId in there (which has 'tcx lifetimes) or we'd need to still treat it differently in the end, which would end up with the code we have now.

@ghost

Rollup of 10 pull requests Successful merges: - #59150 (Expand suggestions for type ascription parse errors) - #59232 (Merge `Promoted` and `Static` in `mir::Place`) - #59267 (Provide suggestion when using field access instead of path) - #59315 (Add no_hash to query macro and move some queries over) - #59334 (Update build instructions in README.md) - #59362 (Demo `FromIterator` short-circuiting) - #59374 (Simplify checked_duration_since) - #59389 (replace redundant note in deprecation warning) - #59410 (Clarify `{Ord,f32,f64}::clamp` docs a little) - #59419 (Utilize `?` instead of `return None`.) Failed merges: r? @ghost

@ghost

Rollup of 10 pull requests Successful merges: - #59150 (Expand suggestions for type ascription parse errors) - #59232 (Merge `Promoted` and `Static` in `mir::Place`) - #59267 (Provide suggestion when using field access instead of path) - #59315 (Add no_hash to query macro and move some queries over) - #59334 (Update build instructions in README.md) - #59362 (Demo `FromIterator` short-circuiting) - #59374 (Simplify checked_duration_since) - #59389 (replace redundant note in deprecation warning) - #59410 (Clarify `{Ord,f32,f64}::clamp` docs a little) - #59419 (Utilize `?` instead of `return None`.) Failed merges: r? @ghost

eddyb · 2019-03-27T10:08:58Z

src/librustc/mir/mod.rs

 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
 pub struct Static<'tcx> {
-    pub def_id: DefId,
    pub ty: Ty<'tcx>,


cc @arielb1 @nikomatsakis Are pre-normalized types in MIR still needed?

rust-highfive assigned davidtwco Mar 16, 2019

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 16, 2019

rust-highfive assigned oli-obk and unassigned davidtwco Mar 16, 2019

saleemjaffer changed the title ~~promoted is still left in 2 places~~ Merge Promoted and Static in mir::Place Mar 16, 2019