DO NOT MERGE: test macOS on try

src/ci/azure-pipelines/try.yml

@@ -6,17 +6,45 @@ variables:
 - group: prod-credentials
 
 jobs:
-- job: Linux
+- job: macOS
   timeoutInMinutes: 600
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: macos-10.15
   steps:
   - template: steps/run.yml
   strategy:
     matrix:
-      dist-x86_64-linux: {}
-      dist-x86_64-linux-alt:
-        IMAGE: dist-x86_64-linux
+      # OSX builders running tests, these run the full test suite.
+      # NO_DEBUG_ASSERTIONS=1 to make them go faster, but also do have some
+      # runners that run `//ignore-debug` tests.
+      #
+      # Note that the compiler is compiled to target 10.8 here because the Xcode
+      # version that we're using, 8.2, cannot compile LLVM for OSX 10.7.
+      x86_64-apple:
+        SCRIPT: ./x.py test
+        RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
+        RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
+        MACOSX_DEPLOYMENT_TARGET: 10.8
+        MACOSX_STD_DEPLOYMENT_TARGET: 10.7
+        NO_LLVM_ASSERTIONS: 1
+        NO_DEBUG_ASSERTIONS: 1
+
+      dist-x86_64-apple:
+        SCRIPT: ./x.py dist
+        RUST_CONFIGURE_ARGS: --target=aarch64-apple-ios,x86_64-apple-ios --enable-full-tools --enable-sanitizers --enable-profiler --set rust.jemalloc
+        RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
+        MACOSX_DEPLOYMENT_TARGET: 10.7
+        NO_LLVM_ASSERTIONS: 1
+        NO_DEBUG_ASSERTIONS: 1
+        DIST_REQUIRE_ALL_TOOLS: 1
+
+      dist-x86_64-apple-alt:
+        SCRIPT: ./x.py dist
+        RUST_CONFIGURE_ARGS: --enable-extended --enable-profiler --set rust.jemalloc
+        RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
+        MACOSX_DEPLOYMENT_TARGET: 10.7
+        NO_LLVM_ASSERTIONS: 1
+        NO_DEBUG_ASSERTIONS: 1
 
 # The macOS and Windows builds here are currently disabled due to them not being
 # overly necessary on `try` builds. We also don't actually have anything that