Auto merge of #112779 - Kobzol:ci-merge-llvm-14, r=pietroalbini

CI: merge x86_64-gnu-llvm-14 and x86_64-gnu-llvm-14-stage1 CI jobs

Another attempt to shorten CI job times. Suggested by `@the8472` [here](https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/CI.20usage/near/367172221).

Author: bors

.github/workflows/ci.yml

@@ -37,6 +37,7 @@ jobs:
   pr:
     name: "PR - ${{ matrix.name }}"
     env:
+      PR_CI_JOB: 1
       CI_JOB_NAME: "${{ matrix.name }}"
       CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       HEAD_SHA: "${{ github.event.pull_request.head.sha || github.sha }}"
@@ -296,10 +297,6 @@ jobs:
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-20.04-8core-32gb
-          - name: x86_64-gnu-llvm-14-stage1
-            env:
-              RUST_BACKTRACE: 1
-            os: ubuntu-20.04-8core-32gb
           - name: x86_64-gnu-nopt
             os: ubuntu-20.04-4core-16gb
             env: {}

src/ci/docker/host-x86_64/x86_64-gnu-llvm-14-stage1/Dockerfile

@@ -49,20 +49,6 @@ ENV RUST_CONFIGURE_ARGS \
       --enable-llvm-link-shared \
       --set rust.thin-lto-import-instr-limit=10
 
-# NOTE: intentionally uses all of `x.py`, `x`, and `x.ps1` to make sure they all work on Linux.
-ENV SCRIPT ../x.py --stage 2 test --exclude src/tools/tidy && \
-           # Run the `mir-opt` tests again but this time for a 32-bit target.
-           # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
-           # both 32-bit and 64-bit outputs updated by the PR author, before
-           # the PR is approved and tested for merging.
-           # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
-           # despite having different output on 32-bit vs 64-bit targets.
-           ../x --stage 2 test tests/mir-opt \
-                             --host='' --target=i686-unknown-linux-gnu && \
-           # Run the UI test suite again, but in `--pass=check` mode
-           #
-           # This is intended to make sure that both `--pass=check` continues to
-           # work.
-           #
-           ../x.ps1 --stage 2 test tests/ui --pass=check \
-                             --host='' --target=i686-unknown-linux-gnu
+COPY host-x86_64/x86_64-gnu-llvm-14/script.sh /tmp/
+
+ENV SCRIPT /tmp/script.sh

src/ci/docker/host-x86_64/x86_64-gnu-llvm-14/Dockerfile

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -ex
+
+# Only run the stage 1 tests on merges, not on PR CI jobs.
+if [[ -z "${PR_CI_JOB}" ]]; then
+../x.py --stage 1 test --exclude src/tools/tidy && \
+           # Run the `mir-opt` tests again but this time for a 32-bit target.
+           # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
+           # both 32-bit and 64-bit outputs updated by the PR author, before
+           # the PR is approved and tested for merging.
+           # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
+           # despite having different output on 32-bit vs 64-bit targets.
+           ../x.py --stage 1 test tests/mir-opt \
+                             --host='' --target=i686-unknown-linux-gnu
+fi
+
+# NOTE: intentionally uses all of `x.py`, `x`, and `x.ps1` to make sure they all work on Linux.
+../x.py --stage 2 test --exclude src/tools/tidy && \
+     # Run the `mir-opt` tests again but this time for a 32-bit target.
+     # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
+     # both 32-bit and 64-bit outputs updated by the PR author, before
+     # the PR is approved and tested for merging.
+     # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
+     # despite having different output on 32-bit vs 64-bit targets.
+     ../x --stage 2 test tests/mir-opt \
+                       --host='' --target=i686-unknown-linux-gnu && \
+     # Run the UI test suite again, but in `--pass=check` mode
+     #
+     # This is intended to make sure that both `--pass=check` continues to
+     # work.
+     #
+     ../x.ps1 --stage 2 test tests/ui --pass=check \
+                       --host='' --target=i686-unknown-linux-gnu

src/ci/docker/host-x86_64/x86_64-gnu-llvm-14/script.sh

@@ -263,6 +263,7 @@ docker \
   --env CI_JOB_NAME="${CI_JOB_NAME-$IMAGE}" \
   --env BASE_COMMIT="$BASE_COMMIT" \
   --env DIST_TRY_BUILD \
+  --env PR_CI_JOB \
   --init \
   --rm \
   rust-ci \

src/ci/docker/run.sh

@@ -311,6 +311,7 @@ jobs:
     name: PR - ${{ matrix.name }}
     env:
       <<: [*shared-ci-variables, *public-variables]
+      PR_CI_JOB: 1
     if: github.event_name == 'pull_request'
     continue-on-error: ${{ matrix.name == 'mingw-check-tidy' }}
     strategy:
@@ -473,11 +474,6 @@ jobs:
               RUST_BACKTRACE: 1
             <<: *job-linux-8c
 
-          - name: x86_64-gnu-llvm-14-stage1
-            env:
-              RUST_BACKTRACE: 1
-            <<: *job-linux-8c
-
           - name: x86_64-gnu-nopt
             <<: *job-linux-4c
 

src/ci/github-actions/ci.yml

@@ -188,6 +188,7 @@ else
 fi
 
 if [ ! -z "$SCRIPT" ]; then
+  echo "Executing ${SCRIPT}"
   sh -x -c "$SCRIPT"
 else
   do_make() {