[NFC] Apply naming cleanup for init_tensor -> tensor.empty changes. (#12221)

diff --git a/compiler/src/iree/compiler/Codegen/Common/ConvertToDestinationPassingStylePass.cpp b/compiler/src/iree/compiler/Codegen/Common/ConvertToDestinationPassingStylePass.cpp
index 6e73a5b..55db046 100644
--- a/compiler/src/iree/compiler/Codegen/Common/ConvertToDestinationPassingStylePass.cpp
+++ b/compiler/src/iree/compiler/Codegen/Common/ConvertToDestinationPassingStylePass.cpp
@@ -7,7 +7,7 @@
 //
 // Transformations that are performed before calling upstream Comprehensive
 // Bufferization pass. These change the dispatch region to use destination
-// passing style, mostly to get rid of `init_tensor` ops that result in an
+// passing style, mostly to get rid of `empty` ops that result in an
 // allocation.
 //
 //===----------------------------------------------------------------------===//
@@ -168,8 +168,8 @@
         op.setDpsInitOperand(resultValue.getResultNumber(), destinationValue);
         return success();
       })
-      .Case<tensor::EmptyOp>([&](auto emptyTensorOp) {
-        emptyTensorOp.replaceAllUsesWith(destinationValue);
+      .Case<tensor::EmptyOp>([&](auto emptyOp) {
+        emptyOp.replaceAllUsesWith(destinationValue);
         return success();
       })
       .Default([](auto defaultOp) {
@@ -250,8 +250,8 @@
 
   llvm::DenseSet<Value> processed;
   auto walkResult = funcOp.walk<WalkOrder::PreOrder>(
-      [&](tensor::EmptyOp emptyTensorOp) -> WalkResult {
-        for (auto result : emptyTensorOp->getResults()) {
+      [&](tensor::EmptyOp emptyOp) -> WalkResult {
+        for (auto result : emptyOp->getResults()) {
           if (!result.getType().isa<RankedTensorType>()) continue;
           if (plan.isInStoreSet(result) && !processed.count(result)) {
             return modifyResultToUseStoreBuffer(b, result, plan, processed);
@@ -264,17 +264,17 @@
 
 /// Multiple uses of `tensor.empty()` results in a copy since upstream
 /// treats `tensor.empty()` as an allocation and sees uses as a data-hazard
-/// creating copies/allocations. Since the `init_tensor` op is a proxy for
+/// creating copies/allocations. Since the `empty` op is a proxy for
 /// undef, these could just be duplicated to have a single use. This removes
 /// unnecessary data-hazards.
-static LogicalResult duplicateInitTensorOps(OpBuilder &b,
-                                            tensor::EmptyOp emptyTensorOp) {
+static LogicalResult duplicateTensorEmptyOps(OpBuilder &b,
+                                             tensor::EmptyOp emptyOp) {
   OpBuilder::InsertionGuard g(b);
-  b.setInsertionPoint(emptyTensorOp);
-  SmallVector<OpOperand *> uses = llvm::to_vector(llvm::map_range(
-      emptyTensorOp->getUses(), [](OpOperand &use) { return &use; }));
+  b.setInsertionPoint(emptyOp);
+  SmallVector<OpOperand *> uses = llvm::to_vector(
+      llvm::map_range(emptyOp->getUses(), [](OpOperand &use) { return &use; }));
   for (auto use : llvm::make_range(std::next(uses.begin()), uses.end())) {
-    auto newOp = cast<tensor::EmptyOp>(b.clone(*emptyTensorOp.getOperation()));
+    auto newOp = cast<tensor::EmptyOp>(b.clone(*emptyOp.getOperation()));
     Operation *user = use->getOwner();
     user->setOperand(use->getOperandNumber(), newOp);
   }
@@ -504,12 +504,10 @@
   MLIRContext *context = &getContext();
 
   OpBuilder b(context);
-  SmallVector<tensor::EmptyOp> emptyTensorOps;
-  funcOp.walk([&](tensor::EmptyOp emptyTensorOp) {
-    emptyTensorOps.push_back(emptyTensorOp);
-  });
-  if (llvm::any_of(emptyTensorOps, [&](tensor::EmptyOp emptyTensorOp) {
-        return failed(duplicateInitTensorOps(b, emptyTensorOp));
+  SmallVector<tensor::EmptyOp> emptyOps;
+  funcOp.walk([&](tensor::EmptyOp emptyOp) { emptyOps.push_back(emptyOp); });
+  if (llvm::any_of(emptyOps, [&](tensor::EmptyOp emptyOp) {
+        return failed(duplicateTensorEmptyOps(b, emptyOp));
       })) {
     return signalPassFailure();
   }
diff --git a/compiler/src/iree/compiler/Codegen/Common/TileDispatchUsingInterface.cpp b/compiler/src/iree/compiler/Codegen/Common/TileDispatchUsingInterface.cpp
index 04e7b5e..a840e5d 100644
--- a/compiler/src/iree/compiler/Codegen/Common/TileDispatchUsingInterface.cpp
+++ b/compiler/src/iree/compiler/Codegen/Common/TileDispatchUsingInterface.cpp
@@ -616,12 +616,12 @@
 };
 
 //===----------------------------------------------------------------------===//
-// SwapExtractSliceWithInitTensor
+// SwapExtractSliceWithTensorEmpty
 //===----------------------------------------------------------------------===//
 
-/// Pattern to swap `init_tensor` -> `tensor.extract_slice` with
-/// `init_tensor` of the slice.
-struct SwapExtractSliceWithInitTensor
+/// Pattern to swap `empty` -> `tensor.extract_slice` with
+/// `empty` of the slice.
+struct SwapExtractSliceWithTensorEmpty
     : public OpRewritePattern<tensor::ExtractSliceOp> {
   using OpRewritePattern<tensor::ExtractSliceOp>::OpRewritePattern;
 
@@ -653,7 +653,7 @@
     RewritePatternSet &patterns, linalg::LinalgTilingOptions options) {
   MLIRContext *context = patterns.getContext();
   patterns.insert<SwapExtractSliceWithDispatchTensorLoad,
-                  SwapExtractSliceWithInitTensor,
+                  SwapExtractSliceWithTensorEmpty,
                   SwapExtractSliceWithTiledProducer>(context);
 }
 
diff --git a/compiler/src/iree/compiler/Codegen/LLVMCPU/test/pipeline_tests.mlir b/compiler/src/iree/compiler/Codegen/LLVMCPU/test/pipeline_tests.mlir
index d1230b7..e3eca6e 100644
--- a/compiler/src/iree/compiler/Codegen/LLVMCPU/test/pipeline_tests.mlir
+++ b/compiler/src/iree/compiler/Codegen/LLVMCPU/test/pipeline_tests.mlir
@@ -5,7 +5,7 @@
 // By proxy checks that destination passing style kicked in correctly
 // and no CSE was run between first level tile + fuse + distribute
 // and the conversion to destination passing style. Running CSE
-// before hoists the fill and the init_tensor out of the loop causing
+// before hoists the fill and the empty out of the loop causing
 // issues with the conversion.
 #map3 = affine_map<(d0) -> (d0)>
 #map4 = affine_map<(d0, d1) -> (d0)>
diff --git a/compiler/src/iree/compiler/Dialect/Flow/Transforms/DetachElementwiseFromNamedOps.cpp b/compiler/src/iree/compiler/Dialect/Flow/Transforms/DetachElementwiseFromNamedOps.cpp
index 764b6db..0a130a5 100644
--- a/compiler/src/iree/compiler/Dialect/Flow/Transforms/DetachElementwiseFromNamedOps.cpp
+++ b/compiler/src/iree/compiler/Dialect/Flow/Transforms/DetachElementwiseFromNamedOps.cpp
@@ -120,7 +120,7 @@
 };
 
 /// Replace uses of splat constants as `outs` operands of `LinalgExt`
-/// operations. More canonical representation is to use a `init_tensor -> fill
+/// operations. More canonical representation is to use a `empty -> fill
 /// -> outs` operand sequence. Splat constants pulled in this way causes issues
 /// with allocations. Using `fill` will allow for fusing with the op just like
 /// fill -> linalg ops are fused. If not as a fallback they would be converted
diff --git a/compiler/src/iree/compiler/Dialect/Flow/Transforms/InitializeEmptyTensors.cpp b/compiler/src/iree/compiler/Dialect/Flow/Transforms/InitializeEmptyTensors.cpp
index 9450845..d49fd9a 100644
--- a/compiler/src/iree/compiler/Dialect/Flow/Transforms/InitializeEmptyTensors.cpp
+++ b/compiler/src/iree/compiler/Dialect/Flow/Transforms/InitializeEmptyTensors.cpp
@@ -34,7 +34,7 @@
 namespace {
 
 /// Converts an tensor.empty() op to `flow.tensor.splat` op.
-struct RewriteInitTensorToSplat : public OpRewritePattern<tensor::EmptyOp> {
+struct RewriteTensorEmptyToSplat : public OpRewritePattern<tensor::EmptyOp> {
   using OpRewritePattern<tensor::EmptyOp>::OpRewritePattern;
   LogicalResult matchAndRewrite(tensor::EmptyOp emptyTensorOp,
                                 PatternRewriter &rewriter) const override {
@@ -62,7 +62,7 @@
 };
 
 /// Converts an tensor.empty() op to `flow.tensor.empty` op.
-struct RewriteInitTensorToEmpty : public OpRewritePattern<tensor::EmptyOp> {
+struct RewriteTensorEmptyToEmpty : public OpRewritePattern<tensor::EmptyOp> {
   using OpRewritePattern<tensor::EmptyOp>::OpRewritePattern;
   LogicalResult matchAndRewrite(tensor::EmptyOp emptyTensorOp,
                                 PatternRewriter &rewriter) const override {
@@ -94,9 +94,9 @@
     MLIRContext *context = &getContext();
     RewritePatternSet patterns(context);
     if (zeroFill) {
-      patterns.insert<RewriteInitTensorToSplat>(context);
+      patterns.insert<RewriteTensorEmptyToSplat>(context);
     } else {
-      patterns.insert<RewriteInitTensorToEmpty>(context);
+      patterns.insert<RewriteTensorEmptyToEmpty>(context);
     }
     if (failed(applyPatternsAndFoldGreedily(getOperation(),
                                             std::move(patterns)))) {
diff --git a/compiler/src/iree/compiler/Dialect/Flow/Transforms/OptimizeNumerics.cpp b/compiler/src/iree/compiler/Dialect/Flow/Transforms/OptimizeNumerics.cpp
index 55c5ec4..f8c4fe1 100644
--- a/compiler/src/iree/compiler/Dialect/Flow/Transforms/OptimizeNumerics.cpp
+++ b/compiler/src/iree/compiler/Dialect/Flow/Transforms/OptimizeNumerics.cpp
@@ -99,20 +99,20 @@
   Optional<std::pair<int64_t, int64_t>> range;
 };
 
-// Eliminates a cast produced by an init_tensor by just initializing to that
+// Eliminates a cast produced by an empty by just initializing to that
 // type directly.
-struct LinalgInitTensorCast
+struct TensorEmptyCast
     : OpInterfaceRewritePattern<IREE::Util::NumericCastOpInterface> {
   using OpInterfaceRewritePattern::OpInterfaceRewritePattern;
 
   LogicalResult matchAndRewrite(IREE::Util::NumericCastOpInterface castOp,
                                 PatternRewriter &rewriter) const override {
-    auto emptyTensorOp = castOp.getInput().getDefiningOp<tensor::EmptyOp>();
-    if (!emptyTensorOp) return failure();
+    auto emptyOp = castOp.getInput().getDefiningOp<tensor::EmptyOp>();
+    if (!emptyOp) return failure();
     Type resultType = castOp.getCasted().getType();
 
-    rewriter.replaceOpWithNewOp<tensor::EmptyOp>(
-        castOp, resultType, emptyTensorOp.getDynamicSizes());
+    rewriter.replaceOpWithNewOp<tensor::EmptyOp>(castOp, resultType,
+                                                 emptyOp.getDynamicSizes());
     return success();
   }
 };
@@ -263,7 +263,7 @@
     patterns.insert<LinalgFpMatmulToLowP>(context);
 
     // Cast propagation.
-    patterns.insert<LinalgInitTensorCast>(context);
+    patterns.insert<TensorEmptyCast>(context);
     patterns.insert<LinalgFillCast>(context);
 
     if (failed(applyPatternsAndFoldGreedily(getOperation(),
diff --git a/compiler/src/iree/compiler/Dialect/Flow/Transforms/test/convert_region_to_workgroups.mlir b/compiler/src/iree/compiler/Dialect/Flow/Transforms/test/convert_region_to_workgroups.mlir
index f448fa6..c2d0a6e 100644
--- a/compiler/src/iree/compiler/Dialect/Flow/Transforms/test/convert_region_to_workgroups.mlir
+++ b/compiler/src/iree/compiler/Dialect/Flow/Transforms/test/convert_region_to_workgroups.mlir
@@ -25,8 +25,8 @@
   // CHECK-NEXT: (%[[arg3:.*]]: !flow.dispatch.tensor<readonly:tensor<5x10xf32>>, %[[arg4:.*]]: !flow.dispatch.tensor<readonly:tensor<10x11xf32>>, %[[arg5:.*]]: !flow.dispatch.tensor<writeonly:tensor<5x11xf32>>)
   //  CHECK-DAG:   %[[loadB:.*]] = flow.dispatch.tensor.load %[[arg3]], offsets = [0, 0], sizes = [5, 10], strides = [1, 1] : !flow.dispatch.tensor<readonly:tensor<5x10xf32>> -> tensor<5x10xf32>
   //  CHECK-DAG:   %[[loadC:.*]] = flow.dispatch.tensor.load %[[arg4]], offsets = [0, 0], sizes = [10, 11], strides = [1, 1] : !flow.dispatch.tensor<readonly:tensor<10x11xf32>> -> tensor<10x11xf32>
-  //      CHECK:   %[[init_tensor:.*]] = tensor.empty() : tensor<5x11xf32>
-  //      CHECK:   %[[fill:.*]] = linalg.fill ins(%{{.*}} : f32) outs(%[[init_tensor]] : tensor<5x11xf32>) -> tensor<5x11xf32>
+  //      CHECK:   %[[empty:.*]] = tensor.empty() : tensor<5x11xf32>
+  //      CHECK:   %[[fill:.*]] = linalg.fill ins(%{{.*}} : f32) outs(%[[empty]] : tensor<5x11xf32>) -> tensor<5x11xf32>
   //      CHECK:   %[[matmul:.*]] = linalg.matmul ins(%[[loadB]], %[[loadC]] : tensor<5x10xf32>, tensor<10x11xf32>) outs(%[[fill]] : tensor<5x11xf32>) -> tensor<5x11xf32>
   //      CHECK:   flow.dispatch.tensor.store %[[matmul]], %[[arg5]], offsets = [0, 0], sizes = [5, 11], strides = [1, 1] : tensor<5x11xf32> -> !flow.dispatch.tensor<writeonly:tensor<5x11xf32>>
   //      CHECK:   flow.return
diff --git a/compiler/src/iree/compiler/Dialect/Util/Analysis/Constant/OpOracle.cpp b/compiler/src/iree/compiler/Dialect/Util/Analysis/Constant/OpOracle.cpp
index 279e9ff..891532f 100644
--- a/compiler/src/iree/compiler/Dialect/Util/Analysis/Constant/OpOracle.cpp
+++ b/compiler/src/iree/compiler/Dialect/Util/Analysis/Constant/OpOracle.cpp
@@ -138,7 +138,7 @@
     }
   }
 
-  // Never hoist init_tensor. These are sometimes used for pure shape metadata
+  // Never hoist empty. These are sometimes used for pure shape metadata
   // and must not be separated from their consumers.
   if (isa<tensor::EmptyOp>(op)) {
     return false;
diff --git a/compiler/src/iree/compiler/Dialect/Util/Transforms/test/hoist_into_globals_linalg.mlir b/compiler/src/iree/compiler/Dialect/Util/Transforms/test/hoist_into_globals_linalg.mlir
index 49b9471..b144b60 100644
--- a/compiler/src/iree/compiler/Dialect/Util/Transforms/test/hoist_into_globals_linalg.mlir
+++ b/compiler/src/iree/compiler/Dialect/Util/Transforms/test/hoist_into_globals_linalg.mlir
@@ -34,7 +34,7 @@
 
 // -----
 // Verifies that projected permutations (broadcasts) will never be materialized
-// as a leaf. Also verifies that init_tensor operands, which can be considered
+// as a leaf. Also verifies that empty operands, which can be considered
 // const-expr, are not materialized as a leaf.
 // CHECK-LABEL: @broadcast_treated_as_leaf
 #map0 = affine_map<(d0, d1) -> ()>
diff --git a/compiler/src/iree/compiler/InputConversion/MHLO/test/convert_mhlo_to_linalg_ext.mlir b/compiler/src/iree/compiler/InputConversion/MHLO/test/convert_mhlo_to_linalg_ext.mlir
index ef677bb..1504703 100644
--- a/compiler/src/iree/compiler/InputConversion/MHLO/test/convert_mhlo_to_linalg_ext.mlir
+++ b/compiler/src/iree/compiler/InputConversion/MHLO/test/convert_mhlo_to_linalg_ext.mlir
@@ -376,12 +376,12 @@
 // CHECK:      func.func @rfft_1d
 // CHECK-SAME:   %[[REAL:[a-zA-Z0-9]+]]
 // CHECK-DAG:    %[[INDICES:.+]] = arith.constant dense<[0, 4, 2, 6, 1, 5, 3, 7]> : tensor<8xi32>
-// CHECK-DAG:    %[[INIT_TENSOR:.+]] = tensor.empty() : tensor<8xf32>
+// CHECK-DAG:    %[[EMPTY:.+]] = tensor.empty() : tensor<8xf32>
 // CHECK:        %[[REORDERED:.+]] = linalg.generic
 // CHECK-SAME:     {indexing_maps = [#[[MAP]], #[[MAP]]]
 // CHECK-SAME:     iterator_types = ["parallel"]
 // CHECK-SAME:     ins(%[[INDICES]]
-// CHECK-SAME:     outs(%[[INIT_TENSOR]]
+// CHECK-SAME:     outs(%[[EMPTY]]
 // CHECK:        ^bb0(%[[IDX:.+]]: i32, %{{.+}}: f32):
 // CHECK:          %[[IDXVAL:.+]] = arith.index_cast %[[IDX]] : i32 to index
 // CHECK:          %[[LOAD:.+]] = tensor.extract %[[REAL]][%[[IDXVAL]]] : tensor<8xf32>
@@ -424,12 +424,12 @@
 // CHECK:      func.func @rfft_2d
 // CHECK-SAME:   %[[REAL:[a-zA-Z0-9]+]]
 // CHECK-DAG:    %[[INDICES:.+]] = arith.constant dense<[0, 4, 2, 6, 1, 5, 3, 7]> : tensor<8xi32>
-// CHECK-DAG:    %[[INIT_TENSOR:.+]] = tensor.empty() : tensor<4x8xf32>
+// CHECK-DAG:    %[[EMPTY:.+]] = tensor.empty() : tensor<4x8xf32>
 // CHECK:        %[[REORDERED:.+]] = linalg.generic
 // CHECK-SAME:     {indexing_maps = [#[[MAP0]], #[[MAP1]]]
 // CHECK-SAME:     iterator_types = ["parallel", "parallel"]
 // CHECK-SAME:     ins(%[[INDICES]]
-// CHECK-SAME:     outs(%[[INIT_TENSOR]]
+// CHECK-SAME:     outs(%[[EMPTY]]
 // CHECK:        ^bb0(%[[IDX:.+]]: i32, %{{.+}}: f32):
 // CHECK:          %[[I:.+]] = linalg.index 0
 // CHECK:          %[[IDXVAL:.+]] = arith.index_cast %[[IDX]] : i32 to index
diff --git a/llvm-external-projects/iree-dialects/lib/Dialect/LinalgExt/Passes/MaterializeEncoding.cpp b/llvm-external-projects/iree-dialects/lib/Dialect/LinalgExt/Passes/MaterializeEncoding.cpp
index 72fca61..dcfcb92 100644
--- a/llvm-external-projects/iree-dialects/lib/Dialect/LinalgExt/Passes/MaterializeEncoding.cpp
+++ b/llvm-external-projects/iree-dialects/lib/Dialect/LinalgExt/Passes/MaterializeEncoding.cpp
@@ -147,11 +147,11 @@
       PackOp::getResultShape(rewriter, loc, sourceDims, *innerTileSizesOfr,
                              materializeEncodingInfo->innerDimsPos,
                              materializeEncodingInfo->outerDimsPerm);
-  auto initTensor = rewriter.create<tensor::EmptyOp>(
-      loc, resultDims, resultType.getElementType());
+  auto emptyOp = rewriter.create<tensor::EmptyOp>(loc, resultDims,
+                                                  resultType.getElementType());
   Optional<Value> paddingValue = getPaddingValue(source);
   auto packOp = rewriter.create<PackOp>(
-      loc, source, initTensor, materializeEncodingInfo->innerDimsPos,
+      loc, source, emptyOp, materializeEncodingInfo->innerDimsPos,
       *innerTileSizesOfr, paddingValue, materializeEncodingInfo->outerDimsPerm);
   // As we rewrite the SetEncoding and its old result tensor, which used to hold
   // the TensorEncodingAttr, into a pack op with a new result tensor which does
@@ -183,8 +183,8 @@
   Location loc = encodingOp.getLoc();
   SmallVector<OpFoldResult> resultDims =
       getDims(rewriter, loc, encodingOp.getSource());
-  auto initTensor = rewriter.create<tensor::EmptyOp>(
-      loc, resultDims, sourceType.getElementType());
+  auto emptyOp = rewriter.create<tensor::EmptyOp>(loc, resultDims,
+                                                  sourceType.getElementType());
   FailureOr<SmallVector<OpFoldResult>> innerTileSizesOfr =
       getInnerTileSizesOfr(rewriter, loc, sourceType, *materializeEncodingInfo,
                            materializeEncodingValueFn);
@@ -193,7 +193,7 @@
         encodingOp, "failed to generate runtime tile size query");
   }
   return rewriter.create<UnPackOp>(
-      loc, packedValue, initTensor, materializeEncodingInfo->innerDimsPos,
+      loc, packedValue, emptyOp, materializeEncodingInfo->innerDimsPos,
       *innerTileSizesOfr, materializeEncodingInfo->outerDimsPerm);
 }