Auto merge of #78711 - m-ou-se:rollup-pxqnny7, r=m-ou-se

Rollup of 7 pull requests

Successful merges:

 - #77950 (Add support for SHA256 source file hashing)
 - #78624 (Sync rustc_codegen_cranelift)
 - #78626 (Improve errors about #[deprecated] attribute)
 - #78659 (Corrected suggestion for generic parameters in `function_item_references` lint)
 - #78687 (Suggest library/std when running all stage 0 tests)
 - #78699 (Show more error information in lldb_batchmode)
 - #78709 (Fix panic in bootstrap for non-workspace path dependencies.)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -1928,6 +1928,17 @@ dependencies = [
  "opaque-debug 0.2.3",
 ]
 
+[[package]]
+name = "md-5"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b5a279bb9607f9f53c22d496eade00d138d1bdcccd07d74650387cf94942a15"
+dependencies = [
+ "block-buffer 0.9.0",
+ "digest 0.9.0",
+ "opaque-debug 0.3.0",
+]
+
 [[package]]
 name = "mdbook"
 version = "0.4.3"
@@ -2467,7 +2478,7 @@ checksum = "54be6e404f5317079812fc8f9f5279de376d8856929e21c184ecf6bbd692a11d"
 dependencies = [
  "maplit",
  "pest",
- "sha-1",
+ "sha-1 0.8.2",
 ]
 
 [[package]]
@@ -3281,14 +3292,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c267f15c3cfc82a8a441d2bf86bcccf299d1eb625822468e3d8ee6f7c5a1c89"
 dependencies = [
  "cfg-if 0.1.10",
- "md-5",
+ "md-5 0.8.0",
  "rustc-ap-rustc_arena",
  "rustc-ap-rustc_data_structures",
  "rustc-ap-rustc_index",
  "rustc-ap-rustc_macros",
  "rustc-ap-rustc_serialize",
  "scoped-tls",
- "sha-1",
+ "sha-1 0.8.2",
  "tracing",
  "unicode-width",
 ]
@@ -4138,14 +4149,15 @@ name = "rustc_span"
 version = "0.0.0"
 dependencies = [
  "cfg-if 0.1.10",
- "md-5",
+ "md-5 0.9.1",
  "rustc_arena",
  "rustc_data_structures",
  "rustc_index",
  "rustc_macros",
  "rustc_serialize",
  "scoped-tls",
- "sha-1",
+ "sha-1 0.9.1",
+ "sha2",
  "tracing",
  "unicode-width",
 ]
@@ -4510,6 +4522,19 @@ dependencies = [
  "opaque-debug 0.2.3",
 ]
 
+[[package]]
+name = "sha-1"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "170a36ea86c864a3f16dd2687712dd6646f7019f301e57537c7f4dc9f5916770"
+dependencies = [
+ "block-buffer 0.9.0",
+ "cfg-if 0.1.10",
+ "cpuid-bool",
+ "digest 0.9.0",
+ "opaque-debug 0.3.0",
+]
+
 [[package]]
 name = "sha2"
 version = "0.9.1"

compiler/rustc_attr/src/builtin.rs

@@ -637,19 +637,15 @@ pub struct Deprecation {
 }
 
 /// Finds the deprecation attribute. `None` if none exists.
-pub fn find_deprecation(sess: &Session, attrs: &[Attribute], item_sp: Span) -> Option<Deprecation> {
-    find_deprecation_generic(sess, attrs.iter(), item_sp)
+pub fn find_deprecation(sess: &Session, attrs: &[Attribute]) -> Option<(Deprecation, Span)> {
+    find_deprecation_generic(sess, attrs.iter())
 }
 
-fn find_deprecation_generic<'a, I>(
-    sess: &Session,
-    attrs_iter: I,
-    item_sp: Span,
-) -> Option<Deprecation>
+fn find_deprecation_generic<'a, I>(sess: &Session, attrs_iter: I) -> Option<(Deprecation, Span)>
 where
     I: Iterator<Item = &'a Attribute>,
 {
-    let mut depr: Option<Deprecation> = None;
+    let mut depr: Option<(Deprecation, Span)> = None;
     let diagnostic = &sess.parse_sess.span_diagnostic;
 
     'outer: for attr in attrs_iter {
@@ -658,8 +654,11 @@ where
             continue;
         }
 
-        if depr.is_some() {
-            struct_span_err!(diagnostic, item_sp, E0550, "multiple deprecated attributes").emit();
+        if let Some((_, span)) = &depr {
+            struct_span_err!(diagnostic, attr.span, E0550, "multiple deprecated attributes")
+                .span_label(attr.span, "repeated deprecation attribute")
+                .span_label(*span, "first deprecation attribute")
+                .emit();
             break;
         }
 
@@ -780,7 +779,7 @@ where
         sess.mark_attr_used(&attr);
 
         let is_since_rustc_version = sess.check_name(attr, sym::rustc_deprecated);
-        depr = Some(Deprecation { since, note, suggestion, is_since_rustc_version });
+        depr = Some((Deprecation { since, note, suggestion, is_since_rustc_version }, attr.span));
     }
 
     depr

compiler/rustc_codegen_cranelift/.github/workflows/bootstrap_rustc.yml

@@ -0,0 +1,44 @@
+name: Bootstrap rustc using cg_clif
+
+on:
+  - push
+
+jobs:
+  bootstrap_rustc:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cache cargo installed crates
+      uses: actions/cache@v2
+      with:
+        path: ~/.cargo/bin
+        key: ${{ runner.os }}-cargo-installed-crates
+
+    - name: Cache cargo registry and index
+      uses: actions/cache@v2
+      with:
+        path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+        key: ${{ runner.os }}-cargo-registry-and-index-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Cache cargo target dir
+      uses: actions/cache@v2
+      with:
+        path: target
+        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('rust-toolchain', '**/Cargo.lock') }}
+
+    - name: Prepare dependencies
+      run: |
+        git config --global user.email "user@example.com"
+        git config --global user.name "User"
+        ./prepare.sh
+
+    - name: Test
+      run: |
+        # Enable backtraces for easier debugging
+        export RUST_BACKTRACE=1
+
+        ./scripts/test_bootstrap.sh

compiler/rustc_codegen_cranelift/.github/workflows/main.yml

@@ -51,4 +51,13 @@ jobs:
         export COMPILE_RUNS=2
         export RUN_RUNS=2
 
-        ./test.sh --release
+        ./test.sh
+
+    - name: Package prebuilt cg_clif
+      run: tar cvfJ cg_clif.tar.xz build
+
+    - name: Upload prebuilt cg_clif
+      uses: actions/upload-artifact@v2
+      with:
+        name: cg_clif-${{ runner.os }}
+        path: cg_clif.tar.xz

compiler/rustc_codegen_cranelift/.gitignore

@@ -6,7 +6,7 @@ perf.data
 perf.data.old
 *.events
 *.string*
-/build_sysroot/sysroot
+/build
 /build_sysroot/sysroot_src
 /rust
 /rand

compiler/rustc_codegen_cranelift/Cargo.lock

@@ -44,15 +44,15 @@ checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 [[package]]
 name = "cranelift-bforest"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "cranelift-entity",
 ]
 
 [[package]]
 name = "cranelift-codegen"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "byteorder",
  "cranelift-bforest",
@@ -70,7 +70,7 @@ dependencies = [
 [[package]]
 name = "cranelift-codegen-meta"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "cranelift-codegen-shared",
  "cranelift-entity",
@@ -79,17 +79,17 @@ dependencies = [
 [[package]]
 name = "cranelift-codegen-shared"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 
 [[package]]
 name = "cranelift-entity"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 
 [[package]]
 name = "cranelift-frontend"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "cranelift-codegen",
  "log",
@@ -100,7 +100,7 @@ dependencies = [
 [[package]]
 name = "cranelift-module"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "anyhow",
  "cranelift-codegen",
@@ -112,7 +112,7 @@ dependencies = [
 [[package]]
 name = "cranelift-native"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "cranelift-codegen",
  "raw-cpuid",
@@ -122,7 +122,7 @@ dependencies = [
 [[package]]
 name = "cranelift-object"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "anyhow",
  "cranelift-codegen",
@@ -135,7 +135,7 @@ dependencies = [
 [[package]]
 name = "cranelift-simplejit"
 version = "0.67.0"
-source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#4fd90dccabb266e983740e1f5daf8bde9266b286"
+source = "git+https://github.com/bytecodealliance/wasmtime/?branch=main#44cbdecea03c360ea82e6482f0cf6c614effef21"
 dependencies = [
  "cranelift-codegen",
  "cranelift-entity",

compiler/rustc_codegen_cranelift/Readme.md

@@ -2,41 +2,56 @@
 
 > ⚠⚠⚠ Certain kinds of FFI don't work yet. ⚠⚠⚠
 
-The goal of this project is to create an alternative codegen backend for the rust compiler based on [Cranelift](https://github.com/bytecodealliance/wasmtime/blob/master/cranelift). This has the potential to improve compilation times in debug mode. If your project doesn't use any of the things listed under "Not yet supported", it should work fine. If not please open an issue.
+The goal of this project is to create an alternative codegen backend for the rust compiler based on [Cranelift](https://github.com/bytecodealliance/wasmtime/blob/master/cranelift).
+This has the potential to improve compilation times in debug mode.
+If your project doesn't use any of the things listed under "Not yet supported", it should work fine.
+If not please open an issue.
 
-## Building
+## Building and testing
 
 ```bash
 $ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
 $ cd rustc_codegen_cranelift
 $ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
-$ ./test.sh --release
+$ ./build.sh
 ```
 
+To run the test suite replace the last command with:
+
+```bash
+$ ./test.sh
+```
+
+This will implicitly build cg_clif too. Both `build.sh` and `test.sh` accept a `--debug` argument to
+build in debug mode.
+
+Alternatively you can download a pre built version from [GHA]. It is listed in the artifacts section
+of workflow runs. Unfortunately due to GHA restrictions you need to be logged in to access it.
+
+[GHA]: https://github.com/bjorn3/rustc_codegen_cranelift/actions?query=branch%3Amaster+event%3Apush+is%3Asuccess
+
 ## Usage
 
 rustc_codegen_cranelift can be used as a near-drop-in replacement for `cargo build` or `cargo run` for existing projects.
 
-Assuming `$cg_clif_dir` is the directory you cloned this repo into and you followed the instructions (`prepare.sh` and `test.sh`).
+Assuming `$cg_clif_dir` is the directory you cloned this repo into and you followed the instructions (`prepare.sh` and `build.sh` or `test.sh`).
 
 ### Cargo
 
 In the directory with your project (where you can do the usual `cargo build`), run:
 
 ```bash
-$ $cg_clif_dir/cargo.sh run
+$ $cg_clif_dir/build/cargo.sh run
 ```
 
 This should build and run your project with rustc_codegen_cranelift instead of the usual LLVM backend.
 
-If you compiled cg_clif in debug mode (aka you didn't pass `--release` to `./test.sh`) you should set `CHANNEL="debug"`.
-
 ### Rustc
 
 > You should prefer using the Cargo method.
 
 ```bash
-$ $cg_clif_dir/target/release/cg_clif my_crate.rs
+$ $cg_clif_dir/build/cg_clif my_crate.rs
 ```
 
 ### Jit mode
@@ -47,13 +62,13 @@ In jit mode cg_clif will immediately execute your code without creating an execu
 > The jit mode will probably need cargo integration to make this possible.
 
 ```bash
-$ $cg_clif_dir/cargo.sh jit
+$ $cg_clif_dir/build/cargo.sh jit
 ```
 
 or
 
 ```bash
-$ $cg_clif_dir/target/release/cg_clif --jit my_crate.rs
+$ $cg_clif_dir/build/cg_clif --jit my_crate.rs
 ```
 
 ### Shell
@@ -62,7 +77,7 @@ These are a few functions that allow you to easily run rust code from the shell
 
 ```bash
 function jit_naked() {
-    echo "$@" | $cg_clif_dir/target/release/cg_clif - --jit
+    echo "$@" | $cg_clif_dir/build/cg_clif - --jit
 }
 
 function jit() {