Run the rustc test suite on CI

.github/workflows/rustc.yml

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+name: Various rustc tests
+
+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 "[email protected]"
+        git config --global user.name "User"
+        ./prepare.sh
+
+    - name: Test
+      run: |
+        # Enable backtraces for easier debugging
+        export RUST_BACKTRACE=1
+
+        ./scripts/test_bootstrap.sh
+  rustc_test_suite:
+    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 "[email protected]"
+        git config --global user.name "User"
+        ./prepare.sh
+
+    - name: Test
+      run: |
+        # Enable backtraces for easier debugging
+        export RUST_BACKTRACE=1
+
+        ./scripts/test_rustc_tests.sh

scripts/test_rustc_tests.sh

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+#!/bin/bash
+set -e
+
+cd $(dirname "$0")/../
+
+source ./scripts/setup_rust_fork.sh
+
+echo "[TEST] Test suite of rustc"
+pushd rust
+
+cargo install ripgrep
+
+rm -r src/test/ui/{extern/,panics/,unsized-locals/,thinlto/,simd*,*lto*.rs,linkage*,unwind-*.rs} || true
+for test in $(rg --files-with-matches "asm!|catch_unwind|should_panic|lto" src/test/ui); do
+  rm $test
+done
+
+for test in $(rg -i --files-with-matches "//(\[\w+\])?~|// error-pattern:|// build-fail|// run-fail|-Cllvm-args" src/test/ui); do
+  rm $test
+done
+
+git checkout -- src/test/ui/issues/auxiliary/issue-3136-a.rs # contains //~ERROR, but shouldn't be removed
+
+# these all depend on unwinding support
+rm src/test/ui/backtrace.rs
+rm src/test/ui/array-slice-vec/box-of-array-of-drop-*.rs
+rm src/test/ui/array-slice-vec/slice-panic-*.rs
+rm src/test/ui/array-slice-vec/nested-vec-3.rs
+rm src/test/ui/cleanup-rvalue-temp-during-incomplete-alloc.rs
+rm src/test/ui/issues/issue-26655.rs
+rm src/test/ui/issues/issue-29485.rs
+rm src/test/ui/issues/issue-30018-panic.rs
+rm src/test/ui/multi-panic.rs
+rm src/test/ui/sepcomp/sepcomp-unwind.rs
+rm src/test/ui/structs-enums/unit-like-struct-drop-run.rs
+rm src/test/ui/terminate-in-initializer.rs
+rm src/test/ui/threads-sendsync/task-stderr.rs
+rm src/test/ui/numbers-arithmetic/int-abs-overflow.rs
+rm src/test/ui/drop/drop-trait-enum.rs
+rm src/test/ui/numbers-arithmetic/issue-8460.rs
+
+rm src/test/ui/issues/issue-28950.rs # depends on stack size optimizations
+rm src/test/ui/init-large-type.rs # same
+rm src/test/ui/sse2.rs # cpuid not supported, so sse2 not detected
+rm src/test/ui/issues/issue-33992.rs # unsupported linkages
+rm src/test/ui/issues/issue-51947.rs # same
+rm src/test/ui/numbers-arithmetic/saturating-float-casts.rs # intrinsic gives different but valid result
+rm src/test/ui/mir/mir_misc_casts.rs # depends on deduplication of constants
+rm src/test/ui/mir/mir_raw_fat_ptr.rs # same
+rm src/test/ui/async-await/async-fn-size-moved-locals.rs # -Cpanic=abort shrinks some generator by one byte
+rm src/test/ui/async-await/async-fn-size-uninit-locals.rs # same
+rm src/test/ui/generator/size-moved-locals.rs # same
+rm src/test/ui/fn/dyn-fn-alignment.rs # wants a 256 byte alignment
+rm src/test/ui/test-attrs/test-fn-signature-verification-for-explicit-return-type.rs # "Cannot run dynamic test fn out-of-process"
+rm src/test/ui/intrinsics/intrinsic-nearby.rs # unimplemented nearbyintf32 and nearbyintf64 intrinsics
+
+rm src/test/incremental/hashes/inline_asm.rs # inline asm
+rm src/test/incremental/issue-72386.rs # same
+rm src/test/incremental/change_crate_dep_kind.rs # requires -Cpanic=unwind
+rm src/test/incremental/issue-49482.rs # same
+rm src/test/incremental/issue-54059.rs # same
+rm src/test/incremental/lto.rs # requires lto
+
+rm src/test/pretty/asm.rs # inline asm
+rm src/test/pretty/raw-str-nonexpr.rs # same
+
+rm -r src/test/run-pass-valgrind/unsized-locals
+
+rm src/test/ui/json-bom-plus-crlf-multifile.rs # differing warning
+rm src/test/ui/json-bom-plus-crlf.rs # same
+
+rm src/test/ui/allocator/no_std-alloc-error-handler-default.rs # missing rust_oom definition
+rm src/test/ui/cfg/cfg-panic.rs
+rm src/test/ui/default-alloc-error-hook.rs
+rm -r src/test/ui/hygiene/
+
+rm -r src/test/ui/polymorphization/ # polymorphization not yet supported
+rm src/test/codegen-units/polymorphization/unused_type_parameters.rs # same
+
+rm -r src/test/run-make/fmt-write-bloat/ # tests an optimization
+rm src/test/ui/abi/mir/mir_codegen_calls_variadic.rs # requires float varargs
+rm src/test/ui/abi/variadic-ffi.rs # requires callee side vararg support
+
+echo "[TEST] rustc test suite"
+RUST_TEST_NOCAPTURE=1 COMPILETEST_FORCE_STAGE0=1 ./x.py test --stage 0 src/test/{codegen-units,run-make,run-pass-valgrind,ui}
+popd