[mlir][llvm] Import debug intrinsics from LLVMIR.

[gysit]

Summary

Currently, the import of LLVMIR fails if the program contains debug
intrinsics. The revision adds support to import debug intrinsics that
have no debug expression attached and drops all debug intrinsics with a
non-empty debug expression. It also moves the existing debug intrinsics
into the "intr" namespace by deriving from LLVM_IntrOp.

[rriddle]

mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td

280

Can we error out here at all?

Otherwise, this should have a TODO.

282

mlir/lib/Target/LLVMIR/ConvertFromLLVMIR.cpp

896–897

Why assert here instead of using cast above, or using report_fatal_error/unreachable/etc.?

[gysit]

mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td

280

I prefer putting a TODO since the LLVMIR with debug information I have seen so far contains plenty of intrinsics with debug expressions. A hard error would thus prevent use from importing it at all. I plan to rework the error handling in the import in a follow up commit and will try to think of a better mechanism here. A warning that information has been dropped would be nice. However, we currently drop so much information (all kinds of meta information) that this may produce too many warnings / errors.

[gysit]

Address reviewer comments.

mlir/include/mlir/Dialect/LLVMIR/LLVMAttrDefs.td

 //===----------------------------------------------------------------------===//
 
 def LLVM_DILocalVariableAttr : LLVM_Attr<"DILocalVariable", "di_local_variable", [
     SubElementAttrInterface
   ], "DINodeAttr"> {
   let parameters = (ins
     "DIScopeAttr":$scope,
     "StringAttr":$name,
-    "DIFileAttr":$file,
-    "unsigned":$line,
-    "unsigned":$arg,
-    "unsigned":$alignInBits,
-    "DITypeAttr":$type
+    OptionalParameter<"DIFileAttr">:$file,
+    OptionalParameter<"unsigned">:$line,
+    OptionalParameter<"unsigned">:$arg,
+    OptionalParameter<"unsigned">:$alignInBits,
+    OptionalParameter<"DITypeAttr">:$type
   );
   let builders = [
     AttrBuilderWithInferredContext<(ins
       "DIScopeAttr":$scope, "StringRef":$name, "DIFileAttr":$file,
       "unsigned":$line, "unsigned":$arg, "unsigned":$alignInBits,
       "DITypeAttr":$type
     ), [{
       MLIRContext *ctx = file.getContext();

mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td

def LLVM_CoroResumeOp : LLVM_IntrOp<"coro.resume", [], [], [], 0> {
   let arguments = (ins LLVM_i8Ptr:$handle);
   let assemblyFormat = "$handle attr-dict";
 }
 
 //
 // Debug function intrinsics.
 //
 
-class LLVM_DbgIntrOp<string name> : LLVM_Op<name> {
+class LLVM_DbgIntrOp<string name, string argName> : LLVM_IntrOp<name, [], [], [], 0> {
   let llvmBuilder = [{
     llvm::Module *module = builder.GetInsertBlock()->getModule();
     llvm::LLVMContext &ctx = module->getContext();
     llvm::Function *fn =
       llvm::Intrinsic::getDeclaration(module, llvm::Intrinsic::}]
        # !subst(".", "_", name) # [{);
     builder.CreateCall(fn, {
         llvm::MetadataAsValue::get(ctx,
             llvm::ValueAsMetadata::get(moduleTranslation.lookupValue(opInst.getOperand(0)))),
         llvm::MetadataAsValue::get(ctx, moduleTranslation.translateDebugInfo($varInfo)),
         llvm::MetadataAsValue::get(ctx, llvm::DIExpression::get(ctx, llvm::None)),
       });
   }];
+  let mlirBuilder = [{
+    // Drop all debug intrinsics with a non-empty debug expression.
+    auto *dbgIntr = cast<llvm::DbgVariableIntrinsic>(inst);
+    if(dbgIntr->getExpression()->getNumElements() == 0)
+      $_builder.create<$_qualCppClassName>($_location,
+        $}] # argName # [{, $_var_attr($varInfo));
+  }];
+  let assemblyFormat = [{
+    qualified($varInfo) `=` $}] # argName #
+      [{ `:` qualified(type($}] # argName # [{)) attr-dict
+  }];
 }
 
-def LLVM_DbgAddrOp : LLVM_DbgIntrOp<"dbg.addr"> {
+def LLVM_DbgAddrOp : LLVM_DbgIntrOp<"dbg.addr", "addr"> {
   let summary = "Describe the current address of a local debug info variable.";
   let arguments = (ins LLVM_AnyPointer:$addr, LLVM_DILocalVariableAttr:$varInfo);
-
-  let assemblyFormat = "qualified($varInfo) `=` $addr `:` type($addr) attr-dict";
 }
 
-def LLVM_DbgDeclareOp : LLVM_DbgIntrOp<"dbg.declare"> {
+def LLVM_DbgDeclareOp : LLVM_DbgIntrOp<"dbg.declare", "addr"> {
   let summary = "Declare the address of a local debug info variable.";
   let arguments = (ins LLVM_AnyPointer:$addr, LLVM_DILocalVariableAttr:$varInfo);
-
-  let assemblyFormat = "qualified($varInfo) `=` $addr `:` type($addr) attr-dict";
 }
 
-def LLVM_DbgValueOp : LLVM_DbgIntrOp<"dbg.value"> {
+def LLVM_DbgValueOp : LLVM_DbgIntrOp<"dbg.value", "value"> {
   let summary = "Describe the current value of a local debug info variable.";
   let arguments = (ins LLVM_Type:$value, LLVM_DILocalVariableAttr:$varInfo);
-
-  let assemblyFormat = "qualified($varInfo) `=` $value `:` type($value) attr-dict";
 }
 
 //
 // Variadic function intrinsics.
 //
 
 def LLVM_VaStartOp : LLVM_ZeroResultIntrOp<"vastart">,
                      Arguments<(ins LLVM_i8Ptr:$arg_list)> {

mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td

class LLVM_OpBase<Dialect dialect, string mnemonic, list<Trait> traits = []> :
   // A builder to construct the MLIR LLVM dialect operation given the matching
   // LLVM IR instruction `inst` and its operands `llvmOperands`. The
   // following $-variables exist:
   //   - $name - substituted by the remapped `inst` operand value at the index
   //             of the MLIR operation argument with the given name, or if the
   //             name matches the result name, by a reference to store the
   //             result of the newly created MLIR operation to;
   //   - $_int_attr - substituted by a call to an integer attribute matcher;
+  //   - $_var_attr - substituted by a call to a variable attribute matcher;
   //   - $_resultType - substituted with the MLIR result type;
   //   - $_location - substituted with the MLIR location;
   //   - $_builder - substituted with the MLIR builder;
   //   - $_qualCppClassName - substitiuted with the MLIR operation class name.
   // Additionally, `$$` can be used to produce the dollar character.
   string mlirBuilder = "";
 
   // An array that specifies a mapping from MLIR argument indices to LLVM IR

mlir/lib/Target/LLVMIR/ConvertFromLLVMIR.cpp

public:
   /// using the `convertConstant` method.
   Value convertValue(llvm::Value *value);
 
   /// Converts a range of LLVM values to a range of MLIR values using the
   /// `convertValue` method.
   SmallVector<Value> convertValues(ArrayRef<llvm::Value *> values);
 
   /// Converts `value` to an integer attribute. Asserts if the conversion fails.
-  IntegerAttr matchIntegerAttr(Value value);
+  IntegerAttr matchIntegerAttr(llvm::Value *value);
+
+  /// Converts `value` to a variable attribute. Asserts if the conversion fails.
+  DILocalVariableAttr matchLocalVariableAttr(llvm::Value *value);
 
   /// Translates the debug location.
   Location translateLoc(llvm::DILocation *loc) {
     return debugImporter.translateLoc(loc);
   }
 
   /// Converts the type from LLVM to MLIR LLVM dialect.
   Type convertType(llvm::Type *type) {
Value Importer::convertConstantExpr(llvm::Constant *constant) {
 
   // Update the constant insertion point and return the converted constant.
   Value result = lookupValue(constant);
   constantInsertionOp = result.getDefiningOp();
   return result;
 }
 
 Value Importer::convertValue(llvm::Value *value) {
+  // A value may be wrapped as metadata, for example, when passed to a debug
+  // intrinsic. Unwrap these values before the conversion.
+  if (auto *nodeAsVal = dyn_cast<llvm::MetadataAsValue>(value))
+    if (auto *node = dyn_cast<llvm::ValueAsMetadata>(nodeAsVal->getMetadata()))
+      value = node->getValue();
+
   // Return the mapped value if it has been converted before.
   if (valueMapping.count(value))
     return lookupValue(value);
 
   // Convert constants such as immediate values that have no mapping yet.
   if (auto *constant = dyn_cast<llvm::Constant>(value))
     return convertConstantExpr(constant);
 
   llvm::errs() << diag(*value) << "\n";
   llvm_unreachable("unhandled value");
 }
 
 SmallVector<Value> Importer::convertValues(ArrayRef<llvm::Value *> values) {
   SmallVector<Value> remapped;
   remapped.reserve(values.size());
   for (llvm::Value *value : values)
     remapped.push_back(convertValue(value));
   return remapped;
 }
 
-IntegerAttr Importer::matchIntegerAttr(Value value) {
+IntegerAttr Importer::matchIntegerAttr(llvm::Value *value) {
   IntegerAttr integerAttr;
-  bool success = matchPattern(value, m_Constant(&integerAttr));
+  bool success = matchPattern(convertValue(value), m_Constant(&integerAttr));
   assert(success && "expected a constant value");
   (void)success;
   return integerAttr;
 }
 
+DILocalVariableAttr Importer::matchLocalVariableAttr(llvm::Value *value) {
+  if (auto *nodeAsVal = dyn_cast<llvm::MetadataAsValue>(value))
+    if (auto *node = dyn_cast<llvm::DILocalVariable>(nodeAsVal->getMetadata()))
+      return debugImporter.translate(node);
+  assert(false && "expected a local variable metadata node");
+  return nullptr;
+}
+
 LogicalResult
 Importer::convertBranchArgs(llvm::Instruction *branch, llvm::BasicBlock *target,
                             SmallVectorImpl<Value> &blockArguments) {
   for (auto inst = target->begin(); isa<llvm::PHINode>(inst); ++inst) {
     auto *phi = cast<llvm::PHINode>(&*inst);
     llvm::Value *value = phi->getIncomingValueForBlock(branch->getParent());
     blockArguments.push_back(convertValue(value));
   }

mlir/test/Dialect/LLVMIR/debuginfo.mlir

 
 // CHECK-DAG: #[[SP1:.*]] = #llvm.di_subprogram<compileUnit = #[[CU]], scope = #[[FILE]], name = "value", file = #[[FILE]], line = 4, scopeLine = 4, subprogramFlags = Definition, type = #[[SPTYPE1]]>
 #sp1 = #llvm.di_subprogram<
   // Omit the optional linkageName parameter.
   compileUnit = #cu, scope = #file, name = "value",
   file = #file, line = 4, scopeLine = 4, subprogramFlags = "Definition", type = #spType1
 >
 
-// CHECK-DAG: #[[VAR0:.*]] = #llvm.di_local_variable<scope = #[[SP0]], name = "arg", file = #[[FILE]], line = 6, arg = 1, alignInBits = 0, type = #[[INT0]]>
+// CHECK-DAG: #[[VAR0:.*]] = #llvm.di_local_variable<scope = #[[SP0]], name = "alloc", file = #[[FILE]], line = 6, arg = 1, alignInBits = 32, type = #[[INT0]]>
 #var0 = #llvm.di_local_variable<
-  scope = #sp0, name = "arg", file = #file,
-  line = 6, arg = 1, alignInBits = 0, type = #int0
+  scope = #sp0, name = "alloc", file = #file,
+  line = 6, arg = 1, alignInBits = 32, type = #int0
 >
 
-// CHECK-DAG: #[[VAR1:.*]] = #llvm.di_local_variable<scope = #[[SP1]], name = "arg", file = #[[FILE]], line = 7, arg = 2, alignInBits = 0, type = #[[INT1]]>
+// CHECK-DAG: #[[VAR1:.*]] = #llvm.di_local_variable<scope = #[[SP1]], name = "arg">
 #var1 = #llvm.di_local_variable<
-  scope = #sp1, name = "arg", file = #file,
-  line = 7, arg = 2, alignInBits = 0, type = #int1
+  // Omit the optional parameters.
+  scope = #sp1, name = "arg"
 >
 
 // CHECK: llvm.func @addr(%[[ARG:.*]]: i64)
 llvm.func @addr(%arg: i64) {
   // CHECK: %[[ALLOC:.*]] = llvm.alloca
   %allocCount = llvm.mlir.constant(1 : i32) : i32
   %alloc = llvm.alloca %allocCount x i64 : (i32) -> !llvm.ptr<i64>
 
-  // CHECK: llvm.dbg.addr #[[VAR0]] = %[[ALLOC]]
-  // CHECK: llvm.dbg.declare #[[VAR0]] = %[[ALLOC]]
-  llvm.dbg.addr #var0 = %alloc : !llvm.ptr<i64>
-  llvm.dbg.declare #var0 = %alloc : !llvm.ptr<i64>
+  // CHECK: llvm.intr.dbg.addr #[[VAR0]] = %[[ALLOC]]
+  // CHECK: llvm.intr.dbg.declare #[[VAR0]] = %[[ALLOC]]
+  llvm.intr.dbg.addr #var0 = %alloc : !llvm.ptr<i64>
+  llvm.intr.dbg.declare #var0 = %alloc : !llvm.ptr<i64>
   llvm.return
 }
 
 // CHECK: llvm.func @value(%[[ARG:.*]]: i32)
 llvm.func @value(%arg: i32) -> i32 {
-  // CHECK: llvm.dbg.value #[[VAR1]] = %[[ARG]]
-  llvm.dbg.value #var1 = %arg : i32
+  // CHECK: llvm.intr.dbg.value #[[VAR1]] = %[[ARG]]
+  llvm.intr.dbg.value #var1 = %arg : i32
   llvm.return %arg : i32
 }

mlir/test/Target/LLVMIR/Import/debug-info.ll

 !2 = !DIFile(filename: "debug-info.ll", directory: "/")
 !3 = distinct !DISubprogram(name: "func_loc", scope: !2, file: !2, line: 42, scopeLine: 42, spFlags: DISPFlagDefinition, unit: !1)
 
 ; // -----
 
 ; Verify the module location is set to the source filename.
 ; CHECK: loc("debug-info.ll":0:0)
 source_filename = "debug-info.ll"
+
+; // -----
+
+; CHECK: #[[$SP:.+]] = #llvm.di_subprogram<
+; CHECK: #[[$VAR0:.+]] = #llvm.di_local_variable<scope = #[[$SP]], name = "arg", file = #{{.*}}, line = 1, arg = 1, alignInBits = 32, type = #{{.*}}>
+; CHECK: #[[$VAR1:.+]] = #llvm.di_local_variable<scope = #[[$SP]], name = "arg">
+
+; CHECK-LABEL: @intrinsic
+; CHECK-SAME:  %[[ARG0:[a-zA-Z0-9]+]]
+; CHECK-SAME:  %[[ARG1:[a-zA-Z0-9]+]]
+define void @intrinsic(i64 %0, ptr %1) {
+  ; CHECK: llvm.intr.dbg.value #[[$VAR0]] = %[[ARG0]] : i64 loc(#[[LOC0:.+]])
+  call void @llvm.dbg.value(metadata i64 %0, metadata !5, metadata !DIExpression()), !dbg !7
+  ; CHECK: llvm.intr.dbg.addr #[[$VAR1]] = %[[ARG1]] : !llvm.ptr loc(#[[LOC1:.+]])
+  call void @llvm.dbg.addr(metadata ptr %1, metadata !6, metadata !DIExpression()), !dbg !8
+  ; CHECK: llvm.intr.dbg.declare #[[$VAR1]] = %[[ARG1]] : !llvm.ptr loc(#[[LOC2:.+]])
+  call void @llvm.dbg.declare(metadata ptr %1, metadata !6, metadata !DIExpression()), !dbg !9
+  ret void
+}
+
+; CHECK: #[[LOC0]] = loc(fused<#[[$SP]]>["debug-info.ll":1:2])
+; CHECK: #[[LOC1]] = loc(fused<#[[$SP]]>["debug-info.ll":2:2])
+; CHECK: #[[LOC2]] = loc(fused<#[[$SP]]>["debug-info.ll":3:2])
+
+declare void @llvm.dbg.value(metadata, metadata, metadata)
+declare void @llvm.dbg.addr(metadata, metadata, metadata)
+declare void @llvm.dbg.declare(metadata, metadata, metadata)
+
+!llvm.dbg.cu = !{!1}
+!llvm.module.flags = !{!0}
+!0 = !{i32 2, !"Debug Info Version", i32 3}
+!1 = distinct !DICompileUnit(language: DW_LANG_C, file: !2)
+!2 = !DIFile(filename: "debug-info.ll", directory: "/")
+!3 = distinct !DISubprogram(name: "intrinsic", scope: !2, file: !2, line: 42, scopeLine: 42, spFlags: DISPFlagDefinition, unit: !1)
+!4 = !DIBasicType(name: "int")
+!5 = !DILocalVariable(scope: !3, name: "arg", file: !2, line: 1, arg: 1, align: 32, type: !4);
+!6 = !DILocalVariable(scope: !3, name: "arg")
+!7 = !DILocation(line: 1, column: 2, scope: !3)
+!8 = !DILocation(line: 2, column: 2, scope: !3)
+!9 = !DILocation(line: 3, column: 2, scope: !3)

mlir/test/Target/LLVMIR/llvmir-debug.mlir

#calleeType = #llvm.di_subroutine_type<
   resultType = #si64, argumentTypes = #si64>
 #callee = #llvm.di_subprogram<
   // Omit the linkageName parameter.
   compileUnit = #cu, scope = #file, name = "callee",
   file = #file, line = 4, scopeLine = 4, subprogramFlags = "Definition", type = #calleeType
 >
 #fileScope = #llvm.di_lexical_block_file<scope = #sp, file = #file, discriminator = 0>
 #variable = #llvm.di_local_variable<scope = #fileScope, name = "arg", file = #file, line = 6, arg = 1, alignInBits = 0, type = #si64>
+#variableAddr = #llvm.di_local_variable<scope = #fileScope, name = "alloc">
 
 // CHECK-LABEL: define void @func_with_debug(
 // CHECK-SAME: i64 %[[ARG:.*]]) !dbg ![[FUNC_LOC:[0-9]+]]
 llvm.func @func_with_debug(%arg: i64) {
   // CHECK: %[[ALLOC:.*]] = alloca
   %allocCount = llvm.mlir.constant(1 : i32) : i32
   %alloc = llvm.alloca %allocCount x i64 : (i32) -> !llvm.ptr<i64>
 
   // CHECK: call void @llvm.dbg.value(metadata i64 %[[ARG]], metadata ![[VAR_LOC:[0-9]+]], metadata !DIExpression())
-  // CHECK: call void @llvm.dbg.addr(metadata ptr %[[ALLOC]], metadata ![[VAR_LOC]], metadata !DIExpression())
-  // CHECK: call void @llvm.dbg.declare(metadata ptr %[[ALLOC]], metadata ![[VAR_LOC]], metadata !DIExpression())
-  llvm.dbg.value #variable = %arg : i64
-  llvm.dbg.addr #variable = %alloc : !llvm.ptr<i64>
-  llvm.dbg.declare #variable = %alloc : !llvm.ptr<i64>
+  // CHECK: call void @llvm.dbg.addr(metadata ptr %[[ALLOC]], metadata ![[ADDR_LOC:[0-9]+]], metadata !DIExpression())
+  // CHECK: call void @llvm.dbg.declare(metadata ptr %[[ALLOC]], metadata ![[ADDR_LOC]], metadata !DIExpression())
+  llvm.intr.dbg.value #variable = %arg : i64
+  llvm.intr.dbg.addr #variableAddr = %alloc : !llvm.ptr<i64>
+  llvm.intr.dbg.declare #variableAddr = %alloc : !llvm.ptr<i64>
 
   // CHECK: call void @func_no_debug(), !dbg ![[CALLSITE_LOC:[0-9]+]]
   llvm.call @func_no_debug() : () -> () loc(callsite("mysource.cc":3:4 at "mysource.cc":5:6))
 
   // CHECK: call void @func_no_debug(), !dbg ![[FILE_LOC:[0-9]+]]
   llvm.call @func_no_debug() : () -> () loc("foo.mlir":1:2)
 
   // CHECK: call void @func_no_debug(), !dbg ![[NAMED_LOC:[0-9]+]]

 // CHECK: ![[COMPOSITE_ELEMENTS]] = !{![[COMPOSITE_ELEMENT:.*]]}
 // CHECK: ![[COMPOSITE_ELEMENT]] = !DISubrange(count: 4)
 // CHECK: ![[VECTOR_TYPE]] = !DICompositeType(tag: DW_TAG_array_type, name: "array", file: ![[CU_FILE_LOC]], baseType: ![[ARG_TYPE]], flags: DIFlagVector, elements: ![[VECTOR_ELEMENTS:.*]])
 // CHECK: ![[VECTOR_ELEMENTS]] = !{![[VECTOR_ELEMENT:.*]]}
 // CHECK: ![[VECTOR_ELEMENT]] = !DISubrange(lowerBound: 0, upperBound: 4, stride: 1)
 
 // CHECK: ![[VAR_LOC]] = !DILocalVariable(name: "arg", arg: 1, scope: ![[VAR_SCOPE:.*]], file: ![[CU_FILE_LOC]], line: 6, type: ![[ARG_TYPE]])
 // CHECK: ![[VAR_SCOPE]] = distinct !DILexicalBlockFile(scope: ![[FUNC_LOC]], file: ![[CU_FILE_LOC]], discriminator: 0)
+// CHECK: ![[ADDR_LOC]] = !DILocalVariable(name: "alloc", scope: ![[VAR_SCOPE:.*]])
 
 // CHECK-DAG: ![[CALLSITE_LOC]] = !DILocation(line: 3, column: 4,
 // CHECK-DAG: ![[FILE_LOC]] = !DILocation(line: 1, column: 2,
 // CHECK-DAG: ![[NAMED_LOC]] = !DILocation(line: 10, column: 10
 // CHECK-DAG: ![[FUSED_LOC]] = !DILocation(line: 1, column: 1
 
 // CHECK: ![[FUSEDWITH_LOC]] = !DILocation(line: 2, column: 4, scope: ![[FUSEDWITH_SCOPE:.*]], inlinedAt: ![[INLINE_LOC:.*]])
 // CHECK: ![[FUSEDWITH_SCOPE]] = !DILexicalBlockFile(scope: ![[CALLEE_LOC:.*]], file:
 // CHECK: ![[CALLEE_LOC]] = distinct !DISubprogram(name: "callee", scope: ![[CU_FILE_LOC]], file: ![[CU_FILE_LOC]], line: 4, type: ![[CALLEE_TYPE:.*]], scopeLine: 4, spFlags: DISPFlagDefinition, unit: ![[CU_LOC]])
 // CHECK: ![[CALLEE_TYPE]] = !DISubroutineType(types: ![[CALLEE_ARGS:.*]])
 // CHECK: ![[CALLEE_ARGS]] = !{![[ARG_TYPE:.*]], ![[ARG_TYPE:.*]]}
 // CHECK: ![[INLINE_LOC]] = !DILocation(line: 28, column: 5,

mlir/tools/mlir-tblgen/LLVMIRConversionGen.cpp

while (StringLoc loc = findNextVariable(builderStrRef)) {
     if (succeeded(argIndex)) {
       // Access the LLVM IR operand that maps to the given argument index using
       // the provided argument indices mapping.
       int64_t idx = llvmArgIndices[*argIndex];
       if (idx < 0) {
         return emitError(
             record, "expected non-negative operand index for argument " + name);
       }
+      if (isAttributeName(op, name)) {
+        bs << formatv("llvmOperands[{0}]", idx);
+      } else {
         bool isVariadicOperand = isVariadicOperandName(op, name);
         auto result =
             isVariadicOperand
                 ? formatv("convertValues(llvmOperands.drop_front({0}))", idx)
                 : formatv("convertValue(llvmOperands[{0}])", idx);
         bs << result;
+      }
     } else if (isResultName(op, name)) {
       if (op.getNumResults() != 1)
         return emitError(record, "expected op to have one result");
       bs << formatv("mapValue(inst)");
     } else if (name == "_int_attr") {
       bs << "matchIntegerAttr";
+    } else if (name == "_var_attr") {
+      bs << "matchLocalVariableAttr";
     } else if (name == "_resultType") {
       bs << "convertType(inst->getType())";
     } else if (name == "_location") {
       bs << "translateLoc(inst->getDebugLoc())";
     } else if (name == "_builder") {
       bs << "odsBuilder";
     } else if (name == "_qualCppClassName") {
       bs << op.getQualCppClassName();