[llvm] [TableGen][DecoderEmitter] Add option to emit type-specialized code (PR #146593)

[Sergei Barannikov via llvm-commits]

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@@ -157,18 +155,22 @@ def unrelated: Instruction {
 // DECODER-SUPPRESS-O1-DAG: Opcode: bar
 // DECODER-SUPPRESS-O1-LABEL: DecoderTableAlt32[] =
 // DECODER-SUPPRESS-O1-DAG: Opcode: unrelated
+// DECODER-SUPPRESS-O1-LABEL: DecoderTable64[] =
+// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncDefault:foo
 
 // Under the 'O2' optimization condition, instructions possessing the 'EncodingByHwMode'
 // attribute will be extracted from their original DecoderNamespace and placed into their
 // respective HwMode tables. Meanwhile, other instructions that do not have the 'EncodingByHwMode'
 // attribute but are within the same DecoderNamespace will be stored in the 'Default' table. This
 // approach will significantly reduce instruction redundancy, but it necessitates users to thoroughly
 // consider the interplay between HwMode and DecoderNamespace for their instructions.
+//
+// Additionally, no 32-bit instruction will appear in a 64-bit decoder table and
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s-barannikov wrote:

Is there a change in behavior or just an extra comment?

https://github.com/llvm/llvm-project/pull/146593