[flang-commits] [flang] 2918a47 - [mlir][OpenMP] Annotate `private` vars with `map_idx` when needed (#116770)

via flang-commits flang-commits at lists.llvm.org
Wed Nov 27 20:15:37 PST 2024


Author: Kareem Ergawy
Date: 2024-11-28T05:15:33+01:00
New Revision: 2918a47f421b3d41eb54dbd8751c6e8df2adbe23

URL: https://github.com/llvm/llvm-project/commit/2918a47f421b3d41eb54dbd8751c6e8df2adbe23
DIFF: https://github.com/llvm/llvm-project/commit/2918a47f421b3d41eb54dbd8751c6e8df2adbe23.diff

LOG: [mlir][OpenMP] Annotate `private` vars with `map_idx` when needed (#116770)

This PR extends the MLIR representation for `omp.target` ops by adding a
`map_idx` to `private` vars. This annotation stores the index of the map
info operand corresponding to the private var. If the variable does not
have a map operand, the `map_idx` attribute is either not present at all
or its value is `-1`.

This makes matching the private variable to its map info op easier (see
https://github.com/llvm/llvm-project/pull/116576 for usage).

Added: 
    

Modified: 
    flang/lib/Optimizer/OpenMP/MapsForPrivatizedSymbols.cpp
    flang/test/Lower/OpenMP/DelayedPrivatization/target-private-multiple-variables.f90
    mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
    mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
    mlir/test/Dialect/OpenMP/ops.mlir

Removed: 
    


################################################################################
diff  --git a/flang/lib/Optimizer/OpenMP/MapsForPrivatizedSymbols.cpp b/flang/lib/Optimizer/OpenMP/MapsForPrivatizedSymbols.cpp
index 289e648eed8546..d2c814cc958ddf 100644
--- a/flang/lib/Optimizer/OpenMP/MapsForPrivatizedSymbols.cpp
+++ b/flang/lib/Optimizer/OpenMP/MapsForPrivatizedSymbols.cpp
@@ -1,5 +1,4 @@
-//===- MapsForPrivatizedSymbols.cpp
-//-----------------------------------------===//
+//===- MapsForPrivatizedSymbols.cpp ---------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -28,6 +27,7 @@
 #include "flang/Optimizer/Dialect/Support/KindMapping.h"
 #include "flang/Optimizer/HLFIR/HLFIROps.h"
 #include "flang/Optimizer/OpenMP/Passes.h"
+
 #include "mlir/Dialect/Func/IR/FuncOps.h"
 #include "mlir/Dialect/OpenMP/OpenMPDialect.h"
 #include "mlir/IR/BuiltinAttributes.h"
@@ -124,6 +124,8 @@ class MapsForPrivatizedSymbolsPass
       if (targetOp.getPrivateVars().empty())
         return;
       OperandRange privVars = targetOp.getPrivateVars();
+      llvm::SmallVector<int64_t> privVarMapIdx;
+
       std::optional<ArrayAttr> privSyms = targetOp.getPrivateSyms();
       SmallVector<omp::MapInfoOp, 4> mapInfoOps;
       for (auto [privVar, privSym] : llvm::zip_equal(privVars, *privSyms)) {
@@ -133,17 +135,25 @@ class MapsForPrivatizedSymbolsPass
             SymbolTable::lookupNearestSymbolFrom<omp::PrivateClauseOp>(
                 targetOp, privatizerName);
         if (!privatizerNeedsMap(privatizer)) {
+          privVarMapIdx.push_back(-1);
           continue;
         }
+
+        privVarMapIdx.push_back(targetOp.getMapVars().size() +
+                                mapInfoOps.size());
+
         builder.setInsertionPoint(targetOp);
         Location loc = targetOp.getLoc();
         omp::MapInfoOp mapInfoOp = createMapInfo(loc, privVar, builder);
         mapInfoOps.push_back(mapInfoOp);
+
         LLVM_DEBUG(llvm::dbgs() << "MapsForPrivatizedSymbolsPass created ->\n");
         LLVM_DEBUG(mapInfoOp.dump());
       }
       if (!mapInfoOps.empty()) {
         mapInfoOpsForTarget.insert({targetOp.getOperation(), mapInfoOps});
+        targetOp.setPrivateMapsAttr(
+            mlir::DenseI64ArrayAttr::get(targetOp.getContext(), privVarMapIdx));
       }
     });
     if (!mapInfoOpsForTarget.empty()) {

diff  --git a/flang/test/Lower/OpenMP/DelayedPrivatization/target-private-multiple-variables.f90 b/flang/test/Lower/OpenMP/DelayedPrivatization/target-private-multiple-variables.f90
index b0c76ff3845f83..f3f9bbe4a76a28 100644
--- a/flang/test/Lower/OpenMP/DelayedPrivatization/target-private-multiple-variables.f90
+++ b/flang/test/Lower/OpenMP/DelayedPrivatization/target-private-multiple-variables.f90
@@ -171,12 +171,12 @@ end subroutine target_allocatable
 ! CHECK_SAME        %[[CHAR_VAR_DESC_MAP]] -> %[[MAPPED_ARG3:.[^,]+]] :
 ! CHECK-SAME        !fir.ref<i32>, !fir.ref<!fir.box<!fir.heap<i32>>>, !fir.ref<!fir.box<!fir.array<?xf32>>>, !fir.ref<!fir.boxchar<1>>)
 ! CHECK-SAME:     private(
-! CHECK-SAME:       @[[ALLOC_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[ALLOC_ARG:[^,]+]],
+! CHECK-SAME:       @[[ALLOC_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[ALLOC_ARG:[^,]+]] [map_idx=1],
 ! CHECK-SAME:       @[[REAL_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[REAL_ARG:[^,]+]],
 ! CHECK-SAME:       @[[LB_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[LB_ARG:[^,]+]],
-! CHECK-SAME:       @[[ARR_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[ARR_ARG:[^,]+]],
+! CHECK-SAME:       @[[ARR_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[ARR_ARG:[^,]+]] [map_idx=2],
 ! CHECK-SAME:       @[[COMP_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[COMP_ARG:[^,]+]],
-! CHECK-SAME:       @[[CHAR_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[CHAR_ARG:[^,]+]] :
+! CHECK-SAME:       @[[CHAR_PRIVATIZER_SYM]] %{{[^[:space:]]+}}#0 -> %[[CHAR_ARG:[^,]+]] [map_idx=3] :
 ! CHECK-SAME:       !fir.ref<!fir.box<!fir.heap<i32>>>, !fir.ref<f32>, !fir.ref<i64>, !fir.box<!fir.array<?xf32>>, !fir.ref<complex<f32>>, !fir.boxchar<1>) {
 ! CHECK-NOT:      fir.alloca
 ! CHECK:          hlfir.declare %[[ALLOC_ARG]]

diff  --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 156e6eb371b85d..f6c7f19fffddf9 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -1225,21 +1225,46 @@ def TargetOp : OpenMP_Op<"target", traits = [
     The optional `if_expr` parameter specifies a boolean result of a conditional
     check. If this value is 1 or is not provided then the target region runs on
     a device, if it is 0 then the target region is executed on the host device.
+
+    The `private_maps` attribute connects `private` operands to their corresponding
+    `map` operands. For `private` operands that require a map, the value of the
+    corresponding element in the attribute is the index of the `map` operand
+    (relative to other `map` operands not the whole operands of the operation). For
+    `private` opernads that do not require a map, this value is -1 (which is omitted
+    from the assembly foramt printing).
   }] # clausesDescription;
 
+  let arguments = !con(clausesArgs,
+                       (ins OptionalAttr<DenseI64ArrayAttr>:$private_maps));
+
   let builders = [
     OpBuilder<(ins CArg<"const TargetOperands &">:$clauses)>
   ];
 
   let extraClassDeclaration = [{
     unsigned numMapBlockArgs() { return getMapVars().size(); }
+
+    mlir::Value getMappedValueForPrivateVar(unsigned privVarIdx) {
+      std::optional<DenseI64ArrayAttr> privateMapIdices = getPrivateMapsAttr();
+
+      if (!privateMapIdices.has_value())
+        return {};
+
+      int64_t mapInfoOpIdx = (*privateMapIdices)[privVarIdx];
+
+      if (mapInfoOpIdx == -1)
+        return {};
+
+      return getMapVars()[mapInfoOpIdx];
+    }
   }] # clausesExtraClassDeclaration;
 
   let assemblyFormat = clausesAssemblyFormat # [{
     custom<InReductionMapPrivateRegion>(
         $region, $in_reduction_vars, type($in_reduction_vars),
         $in_reduction_byref, $in_reduction_syms, $map_vars, type($map_vars),
-        $private_vars, type($private_vars), $private_syms) attr-dict
+        $private_vars, type($private_vars), $private_syms, $private_maps)
+        attr-dict
   }];
 
   let hasVerifier = 1;

diff  --git a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
index 94e71e089d4b18..8c5f79a49a334f 100644
--- a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
+++ b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
@@ -487,9 +487,11 @@ struct PrivateParseArgs {
   llvm::SmallVectorImpl<OpAsmParser::UnresolvedOperand> &vars;
   llvm::SmallVectorImpl<Type> &types;
   ArrayAttr &syms;
+  DenseI64ArrayAttr *mapIndices;
   PrivateParseArgs(SmallVectorImpl<OpAsmParser::UnresolvedOperand> &vars,
-                   SmallVectorImpl<Type> &types, ArrayAttr &syms)
-      : vars(vars), types(types), syms(syms) {}
+                   SmallVectorImpl<Type> &types, ArrayAttr &syms,
+                   DenseI64ArrayAttr *mapIndices = nullptr)
+      : vars(vars), types(types), syms(syms), mapIndices(mapIndices) {}
 };
 struct ReductionParseArgs {
   SmallVectorImpl<OpAsmParser::UnresolvedOperand> &vars;
@@ -517,8 +519,10 @@ static ParseResult parseClauseWithRegionArgs(
     SmallVectorImpl<OpAsmParser::UnresolvedOperand> &operands,
     SmallVectorImpl<Type> &types,
     SmallVectorImpl<OpAsmParser::Argument> &regionPrivateArgs,
-    ArrayAttr *symbols = nullptr, DenseBoolArrayAttr *byref = nullptr) {
+    ArrayAttr *symbols = nullptr, DenseI64ArrayAttr *mapIndices = nullptr,
+    DenseBoolArrayAttr *byref = nullptr) {
   SmallVector<SymbolRefAttr> symbolVec;
+  SmallVector<int64_t> mapIndicesVec;
   SmallVector<bool> isByRefVec;
   unsigned regionArgOffset = regionPrivateArgs.size();
 
@@ -538,6 +542,16 @@ static ParseResult parseClauseWithRegionArgs(
             parser.parseArgument(regionPrivateArgs.emplace_back()))
           return failure();
 
+        if (mapIndices) {
+          if (parser.parseOptionalLSquare().succeeded()) {
+            if (parser.parseKeyword("map_idx") || parser.parseEqual() ||
+                parser.parseInteger(mapIndicesVec.emplace_back()) ||
+                parser.parseRSquare())
+              return failure();
+          } else
+            mapIndicesVec.push_back(-1);
+        }
+
         return success();
       }))
     return failure();
@@ -571,6 +585,10 @@ static ParseResult parseClauseWithRegionArgs(
     *symbols = ArrayAttr::get(parser.getContext(), symbolAttrs);
   }
 
+  if (!mapIndicesVec.empty())
+    *mapIndices =
+        mlir::DenseI64ArrayAttr::get(parser.getContext(), mapIndicesVec);
+
   if (byref)
     *byref = makeDenseBoolArrayAttr(parser.getContext(), isByRefVec);
 
@@ -595,14 +613,14 @@ static ParseResult parseBlockArgClause(
 static ParseResult parseBlockArgClause(
     OpAsmParser &parser,
     llvm::SmallVectorImpl<OpAsmParser::Argument> &entryBlockArgs,
-    StringRef keyword, std::optional<PrivateParseArgs> reductionArgs) {
+    StringRef keyword, std::optional<PrivateParseArgs> privateArgs) {
   if (succeeded(parser.parseOptionalKeyword(keyword))) {
-    if (!reductionArgs)
+    if (!privateArgs)
       return failure();
 
-    if (failed(parseClauseWithRegionArgs(parser, reductionArgs->vars,
-                                         reductionArgs->types, entryBlockArgs,
-                                         &reductionArgs->syms)))
+    if (failed(parseClauseWithRegionArgs(
+            parser, privateArgs->vars, privateArgs->types, entryBlockArgs,
+            &privateArgs->syms, privateArgs->mapIndices)))
       return failure();
   }
   return success();
@@ -618,7 +636,8 @@ static ParseResult parseBlockArgClause(
 
     if (failed(parseClauseWithRegionArgs(
             parser, reductionArgs->vars, reductionArgs->types, entryBlockArgs,
-            &reductionArgs->syms, &reductionArgs->byref)))
+            &reductionArgs->syms, /*mapIndices=*/nullptr,
+            &reductionArgs->byref)))
       return failure();
   }
   return success();
@@ -674,12 +693,14 @@ static ParseResult parseInReductionMapPrivateRegion(
     SmallVectorImpl<OpAsmParser::UnresolvedOperand> &mapVars,
     SmallVectorImpl<Type> &mapTypes,
     llvm::SmallVectorImpl<OpAsmParser::UnresolvedOperand> &privateVars,
-    llvm::SmallVectorImpl<Type> &privateTypes, ArrayAttr &privateSyms) {
+    llvm::SmallVectorImpl<Type> &privateTypes, ArrayAttr &privateSyms,
+    DenseI64ArrayAttr &privateMaps) {
   AllRegionParseArgs args;
   args.inReductionArgs.emplace(inReductionVars, inReductionTypes,
                                inReductionByref, inReductionSyms);
   args.mapArgs.emplace(mapVars, mapTypes);
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms,
+                           &privateMaps);
   return parseBlockArgRegion(parser, region, args);
 }
 
@@ -776,8 +797,10 @@ struct PrivatePrintArgs {
   ValueRange vars;
   TypeRange types;
   ArrayAttr syms;
-  PrivatePrintArgs(ValueRange vars, TypeRange types, ArrayAttr syms)
-      : vars(vars), types(types), syms(syms) {}
+  DenseI64ArrayAttr mapIndices;
+  PrivatePrintArgs(ValueRange vars, TypeRange types, ArrayAttr syms,
+                   DenseI64ArrayAttr mapIndices)
+      : vars(vars), types(types), syms(syms), mapIndices(mapIndices) {}
 };
 struct ReductionPrintArgs {
   ValueRange vars;
@@ -804,6 +827,7 @@ static void printClauseWithRegionArgs(OpAsmPrinter &p, MLIRContext *ctx,
                                       ValueRange argsSubrange,
                                       ValueRange operands, TypeRange types,
                                       ArrayAttr symbols = nullptr,
+                                      DenseI64ArrayAttr mapIndices = nullptr,
                                       DenseBoolArrayAttr byref = nullptr) {
   if (argsSubrange.empty())
     return;
@@ -815,21 +839,31 @@ static void printClauseWithRegionArgs(OpAsmPrinter &p, MLIRContext *ctx,
     symbols = ArrayAttr::get(ctx, values);
   }
 
+  if (!mapIndices) {
+    llvm::SmallVector<int64_t> values(operands.size(), -1);
+    mapIndices = DenseI64ArrayAttr::get(ctx, values);
+  }
+
   if (!byref) {
     mlir::SmallVector<bool> values(operands.size(), false);
     byref = DenseBoolArrayAttr::get(ctx, values);
   }
 
-  llvm::interleaveComma(
-      llvm::zip_equal(operands, argsSubrange, symbols, byref.asArrayRef()), p,
-      [&p](auto t) {
-        auto [op, arg, sym, isByRef] = t;
-        if (isByRef)
-          p << "byref ";
-        if (sym)
-          p << sym << " ";
-        p << op << " -> " << arg;
-      });
+  llvm::interleaveComma(llvm::zip_equal(operands, argsSubrange, symbols,
+                                        mapIndices.asArrayRef(),
+                                        byref.asArrayRef()),
+                        p, [&p](auto t) {
+                          auto [op, arg, sym, map, isByRef] = t;
+                          if (isByRef)
+                            p << "byref ";
+                          if (sym)
+                            p << sym << " ";
+
+                          p << op << " -> " << arg;
+
+                          if (map != -1)
+                            p << " [map_idx=" << map << "]";
+                        });
   p << " : ";
   llvm::interleaveComma(types, p);
   p << ") ";
@@ -849,7 +883,7 @@ static void printBlockArgClause(OpAsmPrinter &p, MLIRContext *ctx,
   if (privateArgs)
     printClauseWithRegionArgs(p, ctx, clauseName, argsSubrange,
                               privateArgs->vars, privateArgs->types,
-                              privateArgs->syms);
+                              privateArgs->syms, privateArgs->mapIndices);
 }
 
 static void
@@ -859,7 +893,8 @@ printBlockArgClause(OpAsmPrinter &p, MLIRContext *ctx, StringRef clauseName,
   if (reductionArgs)
     printClauseWithRegionArgs(p, ctx, clauseName, argsSubrange,
                               reductionArgs->vars, reductionArgs->types,
-                              reductionArgs->syms, reductionArgs->byref);
+                              reductionArgs->syms, /*mapIndices=*/nullptr,
+                              reductionArgs->byref);
 }
 
 static void printBlockArgRegion(OpAsmPrinter &p, Operation *op, Region &region,
@@ -891,12 +926,13 @@ static void printInReductionMapPrivateRegion(
     OpAsmPrinter &p, Operation *op, Region &region, ValueRange inReductionVars,
     TypeRange inReductionTypes, DenseBoolArrayAttr inReductionByref,
     ArrayAttr inReductionSyms, ValueRange mapVars, TypeRange mapTypes,
-    ValueRange privateVars, TypeRange privateTypes, ArrayAttr privateSyms) {
+    ValueRange privateVars, TypeRange privateTypes, ArrayAttr privateSyms,
+    DenseI64ArrayAttr privateMaps) {
   AllRegionPrintArgs args;
   args.inReductionArgs.emplace(inReductionVars, inReductionTypes,
                                inReductionByref, inReductionSyms);
   args.mapArgs.emplace(mapVars, mapTypes);
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms, privateMaps);
   printBlockArgRegion(p, op, region, args);
 }
 
@@ -908,7 +944,8 @@ static void printInReductionPrivateRegion(
   AllRegionPrintArgs args;
   args.inReductionArgs.emplace(inReductionVars, inReductionTypes,
                                inReductionByref, inReductionSyms);
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms,
+                           /*mapIndices=*/nullptr);
   printBlockArgRegion(p, op, region, args);
 }
 
@@ -921,7 +958,8 @@ static void printInReductionPrivateReductionRegion(
   AllRegionPrintArgs args;
   args.inReductionArgs.emplace(inReductionVars, inReductionTypes,
                                inReductionByref, inReductionSyms);
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms,
+                           /*mapIndices=*/nullptr);
   args.reductionArgs.emplace(reductionVars, reductionTypes, reductionByref,
                              reductionSyms);
   printBlockArgRegion(p, op, region, args);
@@ -931,7 +969,8 @@ static void printPrivateRegion(OpAsmPrinter &p, Operation *op, Region &region,
                                ValueRange privateVars, TypeRange privateTypes,
                                ArrayAttr privateSyms) {
   AllRegionPrintArgs args;
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms,
+                           /*mapIndices=*/nullptr);
   printBlockArgRegion(p, op, region, args);
 }
 
@@ -941,7 +980,8 @@ static void printPrivateReductionRegion(
     TypeRange reductionTypes, DenseBoolArrayAttr reductionByref,
     ArrayAttr reductionSyms) {
   AllRegionPrintArgs args;
-  args.privateArgs.emplace(privateVars, privateTypes, privateSyms);
+  args.privateArgs.emplace(privateVars, privateTypes, privateSyms,
+                           /*mapIndices=*/nullptr);
   args.reductionArgs.emplace(reductionVars, reductionTypes, reductionByref,
                              reductionSyms);
   printBlockArgRegion(p, op, region, args);
@@ -1560,6 +1600,24 @@ static LogicalResult verifyMapClause(Operation *op, OperandRange mapVars) {
   return success();
 }
 
+static LogicalResult verifyPrivateVarsMapping(TargetOp targetOp) {
+  std::optional<DenseI64ArrayAttr> privateMapIndices =
+      targetOp.getPrivateMapsAttr();
+
+  // None of the private operands are mapped.
+  if (!privateMapIndices.has_value() || !privateMapIndices.value())
+    return success();
+
+  OperandRange privateVars = targetOp.getPrivateVars();
+
+  if (privateMapIndices.value().size() !=
+      static_cast<int64_t>(privateVars.size()))
+    return emitError(targetOp.getLoc(), "sizes of `private` operand range and "
+                                        "`private_maps` attribute mismatch");
+
+  return success();
+}
+
 //===----------------------------------------------------------------------===//
 // TargetDataOp
 //===----------------------------------------------------------------------===//
@@ -1656,14 +1714,23 @@ void TargetOp::build(OpBuilder &builder, OperationState &state,
                   /*in_reduction_vars=*/{}, /*in_reduction_byref=*/nullptr,
                   /*in_reduction_syms=*/nullptr, clauses.isDevicePtrVars,
                   clauses.mapVars, clauses.nowait, clauses.privateVars,
-                  makeArrayAttr(ctx, clauses.privateSyms), clauses.threadLimit);
+                  makeArrayAttr(ctx, clauses.privateSyms), clauses.threadLimit,
+                  /*private_maps=*/nullptr);
 }
 
 LogicalResult TargetOp::verify() {
   LogicalResult verifyDependVars =
       verifyDependVarList(*this, getDependKinds(), getDependVars());
-  return failed(verifyDependVars) ? verifyDependVars
-                                  : verifyMapClause(*this, getMapVars());
+
+  if (failed(verifyDependVars))
+    return verifyDependVars;
+
+  LogicalResult verifyMapVars = verifyMapClause(*this, getMapVars());
+
+  if (failed(verifyMapVars))
+    return verifyMapVars;
+
+  return verifyPrivateVarsMapping(*this);
 }
 
 //===----------------------------------------------------------------------===//

diff  --git a/mlir/test/Dialect/OpenMP/ops.mlir b/mlir/test/Dialect/OpenMP/ops.mlir
index c25a6ef4b4849b..94c63dd8e9aa0e 100644
--- a/mlir/test/Dialect/OpenMP/ops.mlir
+++ b/mlir/test/Dialect/OpenMP/ops.mlir
@@ -2750,6 +2750,30 @@ func.func @omp_target_private(%map1: memref<?xi32>, %map2: memref<?xi32>, %priv_
   return
 }
 
+// CHECK-LABEL: omp_target_private_with_map_idx
+func.func @omp_target_private_with_map_idx(%map1: memref<?xi32>, %map2: memref<?xi32>, %priv_var: !llvm.ptr) -> () {
+  %mapv1 = omp.map.info var_ptr(%map1 : memref<?xi32>, tensor<?xi32>) map_clauses(tofrom) capture(ByRef) -> memref<?xi32> {name = ""}
+  %mapv2 = omp.map.info var_ptr(%map2 : memref<?xi32>, tensor<?xi32>) map_clauses(exit_release_or_enter_alloc) capture(ByRef) -> memref<?xi32> {name = ""}
+
+  // CHECK: omp.target
+
+  // CHECK-SAME: map_entries(
+  // CHECK-SAME:   %{{[^[:space:]]+}} -> %[[MAP1_ARG:[^[:space:]]+]],
+  // CHECK-SAME:   %{{[^[:space:]]+}} -> %[[MAP2_ARG:[^[:space:]]+]]
+  // CHECK-SAME:   : memref<?xi32>, memref<?xi32>
+  // CHECK-SAME: )
+
+  // CHECK-SAME: private(
+  // CHECK-SAME:   @x.privatizer %{{[^[:space:]]+}} -> %[[PRIV_ARG:[^[:space:]]+]] [map_idx=1]
+  // CHECK-SAME:   : !llvm.ptr
+  // CHECK-SAME: )
+  omp.target map_entries(%mapv1 -> %arg0, %mapv2 -> %arg1 : memref<?xi32>, memref<?xi32>) private(@x.privatizer %priv_var -> %priv_arg [map_idx=1] : !llvm.ptr) {
+    omp.terminator
+  }
+
+  return
+}
+
 // CHECK-LABEL: omp_loop
 func.func @omp_loop(%lb : index, %ub : index, %step : index) {
   // CHECK: omp.loop {


        


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