[llvm] 91e77d8 - [TableGen] Restore OpName::OPERAND_LAST emission in InstrInfoEmitter (#125265)

[via llvm-commits]

Author: Rahul Joshi
Date: 2025-01-31T13:19:11-08:00
New Revision: 91e77d88a40f91d4da79c478dbb7d447bb59ed14

URL: https://github.com/llvm/llvm-project/commit/91e77d88a40f91d4da79c478dbb7d447bb59ed14
DIFF: https://github.com/llvm/llvm-project/commit/91e77d88a40f91d4da79c478dbb7d447bb59ed14.diff

LOG: [TableGen] Restore OpName::OPERAND_LAST emission in InstrInfoEmitter (#125265)

- Looks like this sentinel value is used in some downstream backends, so
restore emitting it.
- It now also has the correct value (earlier code may have emitted an
incorrect value for OPERAND_LAST and hence it was removed in
https://github.com/llvm/llvm-project/pull/124960)

Added: 
    

Modified: 
    llvm/utils/TableGen/InstrInfoEmitter.cpp

Removed: 
    


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diff  --git a/llvm/utils/TableGen/InstrInfoEmitter.cpp b/llvm/utils/TableGen/InstrInfoEmitter.cpp
index 55e9d576b9b068..97c00ad4924197 100644
--- a/llvm/utils/TableGen/InstrInfoEmitter.cpp
+++ b/llvm/utils/TableGen/InstrInfoEmitter.cpp
@@ -286,6 +286,7 @@ void InstrInfoEmitter::emitOperandNameMappings(
   OS << "enum {\n";
   for (const auto &[I, Op] : enumerate(OperandNameToID))
     OS << "  " << Op.first << " = " << I << ",\n";
+  OS << "  OPERAND_LAST = " << NumOperandNames << ",\n";
   OS << "};\n";
   OS << "} // end namespace llvm::" << Namespace << "::OpName\n";
   OS << "#endif //GET_INSTRINFO_OPERAND_ENUM\n\n";