[PATCH] D89451: [SystemZ] Mark unsaved argument R6 as live throughout function

[Ulrich Weigand via Phabricator via llvm-commits]

uweigand accepted this revision.
uweigand added a comment.
This revision is now accepted and ready to land.

See inline comment; otherwise this LGTM.



================
Comment at: llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp:357
+    use_iterator E = MRI->use_nodbg_end();
+    for (use_iterator I = MRI->use_nodbg_begin(SystemZ::R6D); I != E; ++I)
+      I->setIsKill(false);
----------------
Just a minor nit, maybe the loop can be written more compact using C++11 features like:

```
    for (auto &I : MRI->use_nodbg_operands(SystemZ::R6D))

```
This should be equivalent as far as I can see.



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