use x86_64 without LLVM and prefer precompiled rustc

Signed-off-by: onur-ozkan <[email protected]>

Author: onur-ozkan

.github/workflows/ci.yml

@@ -58,9 +58,10 @@ jobs:
           - name: mingw-check-tidy
             os: ubuntu-20.04-4core-16gb
             env: {}
-          - name: x86_64-gnu-llvm-17
+          - name: x86_64-gnu
             env:
               ENABLE_GCC_CODEGEN: "1"
+              DOWNLOAD_RUSTC: "1"
             os: ubuntu-20.04-16core-64gb
           - name: x86_64-gnu-tools
             os: ubuntu-20.04-16core-64gb
@@ -294,8 +295,9 @@ jobs:
             os: ubuntu-20.04-8core-32gb
             env: {}
           - name: x86_64-gnu
+            env:
+              DOWNLOAD_RUSTC: "1"
             os: ubuntu-20.04-4core-16gb
-            env: {}
           - name: x86_64-gnu-stable
             env:
               IMAGE: x86_64-gnu

src/ci/docker/run.sh

@@ -310,6 +310,11 @@ if [ "$ENABLE_GCC_CODEGEN" = "1" ]; then
   echo "Setting extra environment values for docker: $extra_env"
 fi
 
+if [ "$DOWNLOAD_RUSTC" = "1" ]; then
+  extra_env="$extra_env --env DOWNLOAD_RUSTC=1"
+  echo "Setting extra environment values for docker: $extra_env"
+fi
+
 docker \
   run \
   --workdir /checkout/obj \

src/ci/github-actions/ci.yml

@@ -357,9 +357,10 @@ jobs:
           - name: mingw-check-tidy
             <<: *job-linux-4c
 
-          - name: x86_64-gnu-llvm-17
+          - name: x86_64-gnu
             env:
               ENABLE_GCC_CODEGEN: "1"
+              DOWNLOAD_RUSTC: "1"
             <<: *job-linux-16c
 
           - name: x86_64-gnu-tools
@@ -476,6 +477,8 @@ jobs:
             <<: *job-linux-8c
 
           - name: x86_64-gnu
+            env:
+              DOWNLOAD_RUSTC: "1"
             <<: *job-linux-4c
 
           # This job ensures commits landing on nightly still pass the full