[llvm] Sparc: Add 64-bit feature (PR #157445)

[Sergei Barannikov via llvm-commits]

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@@ -34,6 +34,9 @@ def FeatureNoFMULS
 def FeatureV9
   : SubtargetFeature<"v9", "IsV9", "true",
                      "Enable SPARC-V9 instructions">;
+def Feature64Bit : SubtargetFeature<"64bit", "Is64Bit", "true",
+                                    "Enable 64-bit mode", [FeatureV9]>;
+
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s-barannikov wrote:

`Is64Bit` predicate in `SparcInstrInfo.td` should be changed to use this feature.


https://github.com/llvm/llvm-project/pull/157445