[llvm] b342d87 - [TableGen][NFC] Add maybe_unused to MRI (#87044)

[via llvm-commits]

Author: Pengcheng Wang
Date: 2024-04-01T18:04:28+08:00
New Revision: b342d87f89a7cc588abd0d28f69b8dfd9e5cfa0a

URL: https://github.com/llvm/llvm-project/commit/b342d87f89a7cc588abd0d28f69b8dfd9e5cfa0a
DIFF: https://github.com/llvm/llvm-project/commit/b342d87f89a7cc588abd0d28f69b8dfd9e5cfa0a.diff

LOG: [TableGen][NFC] Add maybe_unused to MRI (#87044)

This suppresses warning `unused variable 'MRI' [-Wunused-variable]`
for those fusions that don't need `MRI`.

Added: 
    

Modified: 
    llvm/utils/TableGen/MacroFusionPredicatorEmitter.cpp

Removed: 
    


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diff  --git a/llvm/utils/TableGen/MacroFusionPredicatorEmitter.cpp b/llvm/utils/TableGen/MacroFusionPredicatorEmitter.cpp
index e9e63fa8d0de8c..63b827a35177e3 100644
--- a/llvm/utils/TableGen/MacroFusionPredicatorEmitter.cpp
+++ b/llvm/utils/TableGen/MacroFusionPredicatorEmitter.cpp
@@ -108,7 +108,8 @@ void MacroFusionPredicatorEmitter::emitMacroFusionImpl(
     OS.indent(4) << "const TargetSubtargetInfo &STI,\n";
     OS.indent(4) << "const MachineInstr *FirstMI,\n";
     OS.indent(4) << "const MachineInstr &SecondMI) {\n";
-    OS.indent(2) << "auto &MRI = SecondMI.getMF()->getRegInfo();\n";
+    OS.indent(2)
+        << "[[maybe_unused]] auto &MRI = SecondMI.getMF()->getRegInfo();\n";
 
     emitPredicates(Predicates, IsCommutable, PE, OS);