[flang][NFC] Remove hardcoded attr name for fir.dispatch and fid.dt_entry ops

[clementval]

These hardcoded attribute name are a leftover from the upstreaming period when there was no way to get the attribute name without an instance of the operation. It is since possible to do without them and they should be removed to avoid duplication.

This PR cleanup the fir.dt_entry and fir.dispatch ops of these hardcoded attribute name and use their generated getters. Some other PRs will follow to cleanup other operations.

[llvmbot]

@llvm/pr-subscribers-flang-fir-hlfir

Author: Valentin Clement (バレンタイン クレメン) (clementval)

Changes

These hardcoded attribute name are a leftover from the upstreaming period when there was no way to get the attribute name without an instance of the operation. It is since possible to do without them and they should be removed to avoid duplication.

This PR cleanup the fir.dt_entry and fir.dispatch ops of these hardcoded attribute name and use their generated getters. Some other PRs will follow to cleanup other operations.

---

Full diff: https://github.com/llvm/llvm-project/pull/81348.diff

2 Files Affected:

• (modified) flang/include/flang/Optimizer/Dialect/FIROps.td (-2)
• (modified) flang/lib/Optimizer/Dialect/FIROps.cpp (+2-3)

diff --git a/flang/include/flang/Optimizer/Dialect/FIROps.td b/flang/include/flang/Optimizer/Dialect/FIROps.td
index d505fedd6e6415..9d933cc846725b 100644
--- a/flang/include/flang/Optimizer/Dialect/FIROps.td
+++ b/flang/include/flang/Optimizer/Dialect/FIROps.td
@@ -2433,7 +2433,6 @@ def fir_DispatchOp : fir_Op<"dispatch", []> {
     // operand[0] is the object (of class type)
     operand_iterator arg_operand_begin() { return operand_begin() + 1; }
     operand_iterator arg_operand_end() { return operand_end(); }
-    static constexpr llvm::StringRef getMethodAttrNameStr() { return "method"; }
   }];
 }
 
@@ -2933,7 +2932,6 @@ def fir_DTEntryOp : fir_Op<"dt_entry", [HasParent<"TypeInfoOp">]> {
   let hasCustomAssemblyFormat = 1;
 
   let extraClassDeclaration = [{
-    static constexpr llvm::StringRef getMethodAttrNameStr() { return "method"; }
     static constexpr llvm::StringRef getProcAttrNameStr() { return "proc"; }
   }];
 }
diff --git a/flang/lib/Optimizer/Dialect/FIROps.cpp b/flang/lib/Optimizer/Dialect/FIROps.cpp
index a5b31daa6440a2..8edd7de9bfab11 100644
--- a/flang/lib/Optimizer/Dialect/FIROps.cpp
+++ b/flang/lib/Optimizer/Dialect/FIROps.cpp
@@ -2284,12 +2284,11 @@ mlir::ParseResult fir::DTEntryOp::parse(mlir::OpAsmParser &parser,
   // allow `methodName` or `"methodName"`
   if (failed(parser.parseOptionalKeyword(&methodName))) {
     mlir::StringAttr methodAttr;
-    if (parser.parseAttribute(methodAttr,
-                              fir::DTEntryOp::getMethodAttrNameStr(),
+    if (parser.parseAttribute(methodAttr, getMethodAttrName(result.name),
                               result.attributes))
       return mlir::failure();
   } else {
-    result.addAttribute(fir::DTEntryOp::getMethodAttrNameStr(),
+    result.addAttribute(getMethodAttrName(result.name),
                         parser.getBuilder().getStringAttr(methodName));
   }
   mlir::SymbolRefAttr calleeAttr;

[jeanPerier]

LGTM