[llvm] [TableGen] Use bitwise operations to access HwMode ID. (PR #88377)

[Jason Eckhardt via llvm-commits]

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@@ -1781,13 +1781,68 @@ void SubtargetEmitter::EmitHwModeCheck(const std::string &ClassName,
   if (CGH.getNumModeIds() == 1)
     return;
 
-  OS << "unsigned " << ClassName << "::getHwMode() const {\n";
+  // Collect all HwModes and related features defined in the TD files,
+  // and store them in bit format.
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nvjle wrote:

Similarly to earlier comments: "...store them in bit format." -> "store them as a bit vector."

https://github.com/llvm/llvm-project/pull/88377