Bumped minimal tested LLVM version to 9

This bumps the minimal tested llvm version to 9.
This should enable supporting newer LLVM features (and CPU extensions).

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
           - name: mingw-check
             os: ubuntu-latest-xl
             env: {}
-          - name: x86_64-gnu-llvm-8
+          - name: x86_64-gnu-llvm-9
             os: ubuntu-latest-xl
             env: {}
           - name: x86_64-gnu-tools
@@ -265,7 +265,7 @@ jobs:
           - name: x86_64-gnu-distcheck
             os: ubuntu-latest-xl
             env: {}
-          - name: x86_64-gnu-llvm-8
+          - name: x86_64-gnu-llvm-9
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-latest-xl

src/ci/docker/host-x86_64/x86_64-gnu-llvm-9/Dockerfile

@@ -13,7 +13,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
-  llvm-8-tools \
+  llvm-9-tools \
   libedit-dev \
   libssl-dev \
   pkg-config \
@@ -27,7 +27,7 @@ RUN sh /scripts/sccache.sh
 # using llvm-link-shared due to libffi issues -- see #34486
 ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
-      --llvm-root=/usr/lib/llvm-8 \
+      --llvm-root=/usr/lib/llvm-9 \
       --enable-llvm-link-shared \
       --set rust.thin-lto-import-instr-limit=10
 

src/ci/github-actions/ci.yml

@@ -280,7 +280,7 @@ jobs:
           - name: mingw-check
             <<: *job-linux-xl
 
-          - name: x86_64-gnu-llvm-8
+          - name: x86_64-gnu-llvm-9
             <<: *job-linux-xl
 
           - name: x86_64-gnu-tools
@@ -412,7 +412,7 @@ jobs:
           - name: x86_64-gnu-distcheck
             <<: *job-linux-xl
 
-          - name: x86_64-gnu-llvm-8
+          - name: x86_64-gnu-llvm-9
             env:
               RUST_BACKTRACE: 1
             <<: *job-linux-xl