[llvm-branch-commits] [llvm] Use register pair for PC spill (PR #169098)

[Matt Arsenault via llvm-branch-commits]

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@@ -282,6 +290,18 @@ bool SILowerSGPRSpills::spillCalleeSavedRegs(
       }
     }
 
+    // Return address uses a register pair. Add the super register to the
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arsenm wrote:

Should this really special case the return address? Could we compact the representation by emitting CFI for the largest possible tuple covering? 

https://github.com/llvm/llvm-project/pull/169098