Rollup merge of rust-lang#78624 - bjorn3:update_cg_clif-2020-11-01, r…

…=jyn514

Sync rustc_codegen_cranelift

This fixes bootstrapping of rustc using cg_clif again. It regressed a while before rust-lang#77975 got merged.

Fixes https://github.com/bjorn3/rustc_codegen_cranelift/issues/743

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() {

compiler/rustc_codegen_cranelift/build.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+set -e
+
+# Settings
+export CHANNEL="release"
+build_sysroot=1
+target_dir='build'
+while [[ $# != 0 ]]; do
+    case $1 in
+        "--debug")
+            export CHANNEL="debug"
+            ;;
+        "--without-sysroot")
+            build_sysroot=0
+            ;;
+        "--target-dir")
+            target_dir=$2
+            shift
+            ;;
+        *)
+            echo "Unknown flag '$1'"
+            echo "Usage: ./build.sh [--debug] [--without-sysroot] [--target-dir DIR]"
+            ;;
+    esac
+    shift
+done
+
+# Build cg_clif
+export RUSTFLAGS="-Zrun_dsymutil=no"
+if [[ "$CHANNEL" == "release" ]]; then
+    cargo build --release
+else
+    cargo build
+fi
+
+rm -rf $target_dir
+mkdir $target_dir
+cp -a target/$CHANNEL/cg_clif{,_build_sysroot} target/$CHANNEL/*rustc_codegen_cranelift* $target_dir/
+cp -a rust-toolchain scripts/config.sh scripts/cargo.sh $target_dir
+
+if [[ "$build_sysroot" == "1" ]]; then
+    echo "[BUILD] sysroot"
+    export CG_CLIF_INCR_CACHE_DISABLED=1
+    dir=$(pwd)
+    cd $target_dir
+    time $dir/build_sysroot/build_sysroot.sh
+fi

compiler/rustc_codegen_cranelift/build_sysroot/build_sysroot.sh

@@ -3,25 +3,28 @@
 # Requires the CHANNEL env var to be set to `debug` or `release.`
 
 set -e
-cd $(dirname "$0")
 
-pushd ../ >/dev/null
-source ./scripts/config.sh
-popd >/dev/null
+source ./config.sh
 
-# Cleanup for previous run
-#     v Clean target dir except for build scripts and incremental cache
-rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
-rm -r sysroot/ 2>/dev/null || true
+dir=$(pwd)
 
 # Use rustc with cg_clif as hotpluggable backend instead of the custom cg_clif driver so that
 # build scripts are still compiled using cg_llvm.
-export RUSTC=$(pwd)/../"target/"$CHANNEL"/cg_clif_build_sysroot"
+export RUSTC=$dir"/cg_clif_build_sysroot"
 export RUSTFLAGS=$RUSTFLAGS" --clif"
 
+cd $(dirname "$0")
+
+# Cleanup for previous run
+#     v Clean target dir except for build scripts and incremental cache
+rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
+
+# We expect the target dir in the default location. Guard against the user changing it.
+export CARGO_TARGET_DIR=target
+
 # Build libs
 export RUSTFLAGS="$RUSTFLAGS -Zforce-unstable-if-unmarked -Cpanic=abort"
-if [[ "$1" == "--release" ]]; then
+if [[ "$1" != "--debug" ]]; then
     sysroot_channel='release'
     # FIXME Enable incremental again once rust-lang/rust#74946 is fixed
     # FIXME Enable -Zmir-opt-level=2 again once it doesn't ice anymore
@@ -32,5 +35,5 @@ else
 fi
 
 # Copy files to sysroot
-mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
-cp -r target/$TARGET_TRIPLE/$sysroot_channel/deps/* sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
+mkdir -p $dir/sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
+cp -a target/$TARGET_TRIPLE/$sysroot_channel/deps/* $dir/sysroot/lib/rustlib/$TARGET_TRIPLE/lib/

compiler/rustc_codegen_cranelift/build_sysroot/prepare_sysroot_src.sh

@@ -12,7 +12,7 @@ fi
 
 rm -rf $DST_DIR
 mkdir -p $DST_DIR/library
-cp -r $SRC_DIR/library $DST_DIR/
+cp -a $SRC_DIR/library $DST_DIR/
 
 pushd $DST_DIR
 echo "[GIT] init"

compiler/rustc_codegen_cranelift/clean_all.sh

@@ -1,5 +1,5 @@
 #!/bin/bash --verbose
 set -e
 
-rm -rf target/ build_sysroot/{sysroot/,sysroot_src/,target/} perf.data{,.old}
+rm -rf target/ build/ build_sysroot/{sysroot_src/,target/} perf.data{,.old}
 rm -rf rand/ regex/ simple-raytracer/

compiler/rustc_codegen_cranelift/docs/env_vars.md

@@ -9,7 +9,4 @@
     object files when their content should have been changed by a change to cg_clif.</dd>
     <dt>CG_CLIF_DISPLAY_CG_TIME</dt>
     <dd>If "1", display the time it took to perform codegen for a crate</dd>
-    <dt>CG_CLIF_FUNCTION_SECTIONS</dt>
-    <dd>Use a single section for each function. This will often reduce the executable size at the
-        cost of making linking significantly slower.</dd>
 </dl>

compiler/rustc_codegen_cranelift/example/mini_core.rs

@@ -48,6 +48,7 @@ unsafe impl Copy for u8 {}
 unsafe impl Copy for u16 {}
 unsafe impl Copy for u32 {}
 unsafe impl Copy for u64 {}
+unsafe impl Copy for u128 {}
 unsafe impl Copy for usize {}
 unsafe impl Copy for i8 {}
 unsafe impl Copy for i16 {}
@@ -283,6 +284,15 @@ impl PartialEq for u64 {
     }
 }
 
+impl PartialEq for u128 {
+    fn eq(&self, other: &u128) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u128) -> bool {
+        (*self) != (*other)
+    }
+}
+
 impl PartialEq for usize {
     fn eq(&self, other: &usize) -> bool {
         (*self) == (*other)