Add JitOptRepeat to JIT experimental AzDO pipeline

Add one job that runs JitOptRepeat on all functions, 2 repetitions.

Author: BruceForstall

eng/pipelines/common/templates/runtimes/run-test-job.yml

@@ -535,6 +535,7 @@ jobs:
             scenarios:
             - jitosr_stress
             - jitpartialcompilation_pgo
+            - jitoptrepeat
           ${{ else }}:
             scenarios:
             - jitosr_stress
@@ -546,6 +547,7 @@ jobs:
             - jitphysicalpromotion_only
             - jitphysicalpromotion_full
             - jitrlcse
+            - jitoptrepeat
         ${{ if in(parameters.testGroup, 'jit-cfg') }}:
           scenarios:
           - jitcfg

src/tests/Common/testenvironment.proj

@@ -81,6 +81,9 @@
       DOTNET_JitSynthesizeCounts;
       DOTNET_JitCheckSynthesizedCounts;
       DOTNET_JitRLCSEGreedy;
+      DOTNET_JitEnableOptRepeat;
+      DOTNET_JitOptRepeat;
+      DOTNET_JitOptRepeatCount;
     </DOTNETVariables>
   </PropertyGroup>
   <ItemGroup>
@@ -239,6 +242,7 @@
     <TestEnvironment Include="syntheticpgo" TieredCompilation="1" TC_QuickJitForLoops="1" ReadyToRun="0" JitSynthesizeCounts="1" JitCheckSynthesizedCounts="1" />
     <TestEnvironment Include="syntheticpgo_blend" TieredPGO="1" TieredCompilation="1" TC_QuickJitForLoops="1" ReadyToRun="0" JitSynthesizeCounts="3" JitCheckSynthesizedCounts="1" />
     <TestEnvironment Include="jitrlcse" JitRLCSEGreedy="1" />
+    <TestEnvironment Include="jitoptrepeat" JitEnableOptRepeat="1" JitOptRepeat="*" JitOptRepeatCount="2"/>
     <TestEnvironment Include="gcstandalone" Condition="'$(TargetsWindows)' == 'true'" GCName="clrgc.dll"/>
     <TestEnvironment Include="gcstandalone" Condition="'$(TargetsWindows)' != 'true'" GCName="libclrgc.so"/>
     <TestEnvironment Include="gcstandaloneserver" Condition="'$(TargetsWindows)' == 'true'" gcServer="1" GCName="clrgc.dll"/>