commit 457c9aec9e845d09202ed8de83be122b9b58d2d7
author Craig Topper <craig.topper@sifive.com> Fri Jun 27 10:25:17 2025 -0700
committer Craig Topper <craig.topper@sifive.com> Fri Jun 27 14:58:39 2025 -0700
tree bc86ec45d9e17ec665c3ab7febe857427c328b9c
parent 8bc61cbfde28c014b8d18ae8066f1371808d2aa7

[TableGen] Simplify how we calculate NumMIOperands in addDagOperandMapping. NFC

We can use the MIOperandNo and NumMIOperands from the last operand
instead using a loop.

llvm/utils/TableGen/CompressInstEmitter.cpp

diff --git a/llvm/utils/TableGen/CompressInstEmitter.cpp b/llvm/utils/TableGen/CompressInstEmitter.cpp
index 4e307c6..9da6436 100644
--- a/llvm/utils/TableGen/CompressInstEmitter.cpp
+++ b/llvm/utils/TableGen/CompressInstEmitter.cpp
@@ -212,8 +212,9 @@
                                                bool IsSourceInst,
                                                unsigned *SourceLastTiedOpPtr) {
   unsigned NumMIOperands = 0;
-  for (const auto &Op : Inst.Operands)
-    NumMIOperands += Op.MINumOperands;
+  if (!Inst.Operands.empty())
+    NumMIOperands =
+        Inst.Operands.back().MIOperandNo + Inst.Operands.back().MINumOperands;
   OperandMap.grow(NumMIOperands);
 
   // TiedCount keeps track of the number of operands skipped in Inst