[llvm] [llvm][CodeGen] Added a check in CodeGenPrepare::optimizeSwitchType (PR #83322)

[Philip Reames via llvm-commits]

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@@ -194,25 +194,108 @@ return:
   %retval = phi i32 [ -1, %sw.default ], [ 0, %sw.bb0 ], [ 1, %sw.bb1 ]
   ret i32 %retval
 }
+define i32 @sext_i32(i16 %a)  {
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preames wrote:

You should add test variants here with zeroext and signext on the arguments to make sure we test the interaction.

https://github.com/llvm/llvm-project/pull/83322