[llvm] [X86] Fix swapped VPTERNLOG231_imm8/VPTERNLOG312_imm8 SDNodeXForm bodies (PR #209782)

[Craig Topper via llvm-commits]

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@@ -11784,7 +11784,20 @@ def VPTERNLOG132_imm8 : SDNodeXForm<timm, [{
   return getI8Imm(NewImm, SDLoc(N));
 }]>;
 def VPTERNLOG231_imm8 : SDNodeXForm<timm, [{
-  // Convert a VPTERNLOG immediate by moving operand 1 to the end.
+  // Convert a VPTERNLOG immediate by moving operand 1 to the beginning.
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topperc wrote:

This one should be operand 2 to the beginning.

https://github.com/llvm/llvm-project/pull/209782