Add CI for LLVM 9.0rc5.

Author: maleadt

.gitlab-ci.yml

@@ -28,3 +28,18 @@ test:dev:llvm8:
                                   Pkg.instantiate();
                                   Pkg.build();
                                   Pkg.test(; coverage=true);'
+
+test:dev:llvm9:
+  stage: test
+  image: ubuntu:18.04
+  script:
+    - apt update
+    - apt install -y git build-essential libatomic1 python gfortran perl wget m4 cmake pkg-config
+    - git clone https://github.com/JuliaLang/julia
+    - make -C julia -j$(nproc) install LLVM_VER=9.0.0rc5 USE_BINARYBUILDER_LLVM=0
+    - ./julia/julia -e 'using InteractiveUtils;
+                        versioninfo()'
+    - ./julia/julia --project -e 'using Pkg;
+                                  Pkg.instantiate();
+                                  Pkg.build();
+                                  Pkg.test(; coverage=true);'