[llvm] [MemProf] Add remarks for matched allocs and calls (PR #170379)

[Teresa Johnson via llvm-commits]

================
@@ -454,6 +454,15 @@ handleAllocSite(Instruction &I, CallBase *CI,
                                                    InlinedCallStack.size())] = {
             AllocInfo->Info.getTotalSize(), AllocType};
       }
+      ORE.emit(
+          OptimizationRemark(DEBUG_TYPE, "MemprofContext", CI)
----------------
teresajohnson wrote:

Looking at the uses, it appears to be only emitted into the YAML remarks format. I usually just pick something sensible. Maybe I should make it "MemProfUse" to be consistent with the pass name? Looking at other invocations across LLVM I don't even see a consistent format (upper camel, lower camel, lower hyphenated, ...), probably because under most circumstances it isn't emitted and I couldn't find any guidance.

https://github.com/llvm/llvm-project/pull/170379