Perform ThinLTO on Windows dist builder in try builds

Author: Kobzol

.github/workflows/ci.yml

@@ -438,7 +438,7 @@ jobs:
             os: windows-2019-8core-32gb
           - name: dist-x86_64-msvc
             env:
-              RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --host=x86_64-pc-windows-msvc --target=x86_64-pc-windows-msvc --enable-full-tools --enable-profiler --set rust.codegen-units=1"
+              RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --host=x86_64-pc-windows-msvc --target=x86_64-pc-windows-msvc --enable-full-tools --enable-profiler --set rust.codegen-units=1 --set rust.lto=thin"
               SCRIPT: python x.py build --set rust.debug=true opt-dist && PGO_HOST=x86_64-pc-windows-msvc ./build/x86_64-pc-windows-msvc/stage0-tools-bin/opt-dist windows-ci -- python x.py dist bootstrap --include-default-paths
               DIST_REQUIRE_ALL_TOOLS: 1
             os: windows-2019-8core-32gb
@@ -592,7 +592,6 @@ jobs:
   try:
     name: "try - ${{ matrix.name }}"
     env:
-      DIST_TRY_BUILD: 1
       CI_JOB_NAME: "${{ matrix.name }}"
       CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       HEAD_SHA: "${{ github.event.pull_request.head.sha || github.sha }}"
@@ -610,10 +609,12 @@ jobs:
     strategy:
       matrix:
         include:
-          - name: dist-x86_64-linux
+          - name: dist-x86_64-msvc
             env:
-              CODEGEN_BACKENDS: "llvm,cranelift"
-            os: ubuntu-20.04-16core-64gb
+              RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --host=x86_64-pc-windows-msvc --target=x86_64-pc-windows-msvc --enable-full-tools --enable-profiler --set rust.codegen-units=1 --set rust.lto=thin"
+              SCRIPT: python x.py build --set rust.debug=true opt-dist && PGO_HOST=x86_64-pc-windows-msvc ./build/x86_64-pc-windows-msvc/stage0-tools-bin/opt-dist windows-ci -- python x.py dist bootstrap --include-default-paths
+              DIST_REQUIRE_ALL_TOOLS: 1
+            os: windows-2019-8core-32gb
     defaults:
       run:
         shell: "${{ contains(matrix.os, 'windows') && 'msys2 {0}' || 'bash' }}"

src/ci/github-actions/ci.yml

@@ -688,6 +688,7 @@ jobs:
                 --enable-full-tools
                 --enable-profiler
                 --set rust.codegen-units=1
+                --set rust.lto=thin
               SCRIPT: python x.py build --set rust.debug=true opt-dist && PGO_HOST=x86_64-pc-windows-msvc ./build/x86_64-pc-windows-msvc/stage0-tools-bin/opt-dist windows-ci -- python x.py dist bootstrap --include-default-paths
               DIST_REQUIRE_ALL_TOOLS: 1
             <<: *job-windows-8c
@@ -753,19 +754,25 @@ jobs:
     <<: *base-ci-job
     name: try - ${{ matrix.name }}
     env:
-      DIST_TRY_BUILD: 1
+#      DIST_TRY_BUILD: 1
       <<: [*shared-ci-variables, *prod-variables]
     if: github.event_name == 'push' && (((github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust') || ((github.ref == 'refs/heads/automation/bors/try') && github.repository == 'rust-lang/rust'))
     strategy:
       matrix:
         include:
-          - &dist-x86_64-linux
-            name: dist-x86_64-linux
+          - name: dist-x86_64-msvc
             env:
-              CODEGEN_BACKENDS: llvm,cranelift
-            <<: *job-linux-16c
-
-
+              RUST_CONFIGURE_ARGS: >-
+                --build=x86_64-pc-windows-msvc
+                --host=x86_64-pc-windows-msvc
+                --target=x86_64-pc-windows-msvc
+                --enable-full-tools
+                --enable-profiler
+                --set rust.codegen-units=1
+                --set rust.lto=thin
+              SCRIPT: python x.py build --set rust.debug=true opt-dist && PGO_HOST=x86_64-pc-windows-msvc ./build/x86_64-pc-windows-msvc/stage0-tools-bin/opt-dist windows-ci -- python x.py dist bootstrap --include-default-paths
+              DIST_REQUIRE_ALL_TOOLS: 1
+            <<: *job-windows-8c
   master:
     name: master
     runs-on: ubuntu-latest