[llvm] [AArch64] Add streaming-mode stack hazard optimization remarks (PR #101695)

[Hari Limaye via llvm-commits]

================
@@ -4626,6 +4643,10 @@ void AArch64FrameLowering::processFunctionBeforeFrameIndicesReplaced(
       if (StackTaggingMergeSetTag)
         II = tryMergeAdjacentSTG(II, this, RS);
     }
+
+  // Run remarks pass.
+  MachineOptimizationRemarkEmitter ORE(MF, nullptr);
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hazzlim wrote:

Good point - I've added a new virtual `emitRemarks` function to TFI so that we can reuse the ORE from PEI. I've put the call to `TFI.emitRemarks()` at the end of `PEI::runOnMachineFunction`, as other target independent remarks passes are run here.

https://github.com/llvm/llvm-project/pull/101695