Automerge: [msan] Handle x86.avx512fp16.{add,sub.mul,div,min,max}.ph.512 (#136619)

These are handled similarly to x86_avx512_(min|max)_p[sd]_512 intrinsics
(llvm/llvm-project#124421) i.e., using
maybeHandleSimpleNomemIntrinsic, with the last parameter being the
rounding method.

Updates the test from llvm/llvm-project#136260

Author: thurstond

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

@@ -5022,6 +5022,12 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     }
 
     // Packed
+    case Intrinsic::x86_avx512fp16_add_ph_512:
+    case Intrinsic::x86_avx512fp16_sub_ph_512:
+    case Intrinsic::x86_avx512fp16_mul_ph_512:
+    case Intrinsic::x86_avx512fp16_div_ph_512:
+    case Intrinsic::x86_avx512fp16_max_ph_512:
+    case Intrinsic::x86_avx512fp16_min_ph_512:
     case Intrinsic::x86_avx512_min_ps_512:
     case Intrinsic::x86_avx512_min_pd_512:
     case Intrinsic::x86_avx512_max_ps_512: