Add upper simd stress test to the AVX512 testing pipeline.

Author: anthonycanino

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

@@ -525,6 +525,7 @@ jobs:
         ${{ if in(parameters.testGroup, 'jitstress-isas-avx512') }}:
           scenarios:
           - jitstress_isas_avx512_forceevex
+          - jitstress_isas_avx512_forceevex_stresshighregs
         ${{ if in(parameters.testGroup, 'jitstressregs-x86') }}:
           scenarios:
           - jitstressregs1_x86_noavx

src/tests/Common/testenvironment.proj

@@ -153,6 +153,7 @@
     <TestEnvironment Include="jitstress_isas_2_x86_nosse42" JitStress="2" EnableSSE42="0" /> <!-- Depends on SSE41 -->
     <TestEnvironment Include="jitstress_isas_2_x86_nossse3" JitStress="2" EnableSSSE3="0" /> <!-- Depends on SSE3 -->
     <TestEnvironment Include="jitstress_isas_avx512_forceevex" JitForceEVEXEncoding="1" /> <!-- Depends on AVX512 -->
+    <TestEnvironment Include="jitstress_isas_avx512_forceevex_stresshighregs" JitForceEVEXEncoding="1" JitStressRegs="0x2000" /> <!-- Depends on AVX512 -->
     <TestEnvironment Include="jitstressregs1_x86_noavx" JitStressRegs="1" EnableAVX="0" />
     <TestEnvironment Include="jitstressregs2_x86_noavx" JitStressRegs="2" EnableAVX="0" />
     <TestEnvironment Include="jitstressregs3_x86_noavx" JitStressRegs="3" EnableAVX="0" />