[MLIR] Introduce a OpWithState class to act as a stream modifier for Operations (NFC) (#151547)
On the model of OpWithFlags, this modifier allows to stream an operation
using a custom AsmPrinter.
diff --git a/mlir/include/mlir/IR/Operation.h b/mlir/include/mlir/IR/Operation.h
index edc8ab4..4f89f8b 100644
--- a/mlir/include/mlir/IR/Operation.h
+++ b/mlir/include/mlir/IR/Operation.h
@@ -1125,6 +1125,26 @@
return os;
}
+/// A wrapper class that allows for printing an operation with a custom
+/// AsmState, useful to act as a "stream modifier" to customize printing an
+/// operation with a stream using the operator<< overload, e.g.:
+/// llvm::dbgs() << OpWithState(op, OpPrintingFlags().skipRegions());
+class OpWithState {
+public:
+ OpWithState(Operation *op, AsmState &state) : op(op), theState(state) {}
+
+private:
+ Operation *op;
+ AsmState &theState;
+ friend raw_ostream &operator<<(raw_ostream &os, const OpWithState &op);
+};
+
+inline raw_ostream &operator<<(raw_ostream &os,
+ const OpWithState &opWithState) {
+ opWithState.op->print(os, const_cast<OpWithState &>(opWithState).theState);
+ return os;
+}
+
} // namespace mlir
namespace llvm {
diff --git a/mlir/lib/Tools/mlir-opt/MlirOptMain.cpp b/mlir/lib/Tools/mlir-opt/MlirOptMain.cpp
index bdcdaa4..de714d8 100644
--- a/mlir/lib/Tools/mlir-opt/MlirOptMain.cpp
+++ b/mlir/lib/Tools/mlir-opt/MlirOptMain.cpp
@@ -501,8 +501,7 @@
<< "bytecode version while not emitting bytecode";
AsmState asmState(op.get(), OpPrintingFlags(), /*locationMap=*/nullptr,
&fallbackResourceMap);
- op.get()->print(os, asmState);
- os << '\n';
+ os << OpWithState(op.get(), asmState) << '\n';
return success();
}
