Add some fast paths that are missing outside Windows

- Allocation fast path for arrays of object elements
  - On Linux, a microbenchmark is 25% faster with the portable fast path
  - On Windows with the asm fast path, the microbenchmark was 52% faster than on Linux before, and is now 22% faster with the portable fast path
  - On Windows, the portable fast path is within 4% slower than the asm fast path
- Allocation fast path for objects
  - On Linux, a microbenchmark is 200% faster with the portable fast path
  - On Windows with the asm fast path, the microbenchmark was 325% faster than on Linux before, and is now 43% faster with the portable fast path
  - On Windows, the portable fast path is within 1% slower than the asm fast path
- Skipped the Box fast path since that seems to be inlined into jitted code using the new object fast path. As a result of adding the new object fast path, boxing perf has also improved outside Windows similarly to above.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/vm/jitinterfacegen.cpp b/src/vm/jitinterfacegen.cpp
index e93a40a0bc..5cf1de911c 100644
--- a/src/vm/jitinterfacegen.cpp
+++ b/src/vm/jitinterfacegen.cpp
@@ -225,7 +225,10 @@ void InitJITHelpers1()
         if (GCHeap::UseAllocationContexts())
         {
 #ifdef FEATURE_IMPLICIT_TLS
+            SetJitHelperFunction(CORINFO_HELP_NEWSFAST, JIT_NewS_MP_FastPortable);
+            SetJitHelperFunction(CORINFO_HELP_NEWSFAST_ALIGN8, JIT_NewS_MP_FastPortable);
             SetJitHelperFunction(CORINFO_HELP_NEWARR_1_VC, JIT_NewArr1VC_MP_FastPortable);
+            SetJitHelperFunction(CORINFO_HELP_NEWARR_1_OBJ, JIT_NewArr1OBJ_MP_FastPortable);
 #else // !FEATURE_IMPLICIT_TLS
             // If the TLS for Thread is low enough use the super-fast helpers
             if (gThreadTLSIndex < TLS_MINIMUM_AVAILABLE)