Don't force newline before function attributes

Due to legacy reasons, a newline character followed by two spaces was always
inserted before the attributes of the function Op in pretty form. This breaks
formatting when functions are nested in some other operations. Don't print the
newline and just put the attributes on the same line, which is also more
consistent with module Op. Line breaking aware of indentation can be introduced
separately into the parser if deemed useful.

PiperOrigin-RevId: 281721793

5 files changed, 9 insertions, 13 deletions

diff --git a/mlir/lib/IR/FunctionSupport.cpp b/mlir/lib/IR/FunctionSupport.cpp
index 6b27eb833bf..1f39575331c 100644
--- a/mlir/lib/IR/FunctionSupport.cpp
+++ b/mlir/lib/IR/FunctionSupport.cpp
@@ -299,11 +299,7 @@ void mlir::impl::printFunctionLikeOp(OpAsmPrinter &p, Operation *op,
       resultAttrStorage.emplace_back(attrNameBuf);
   ignoredAttrs.append(resultAttrStorage.begin(), resultAttrStorage.end());
 
-  auto attrs = op->getAttrs();
-  if (attrs.size() > ignoredAttrs.size()) {
-    p << "\n  attributes ";
-    p.printOptionalAttrDict(attrs, ignoredAttrs);
-  }
+  p.printOptionalAttrDictWithKeyword(op->getAttrs(), ignoredAttrs);
 
   // Print the body if this is not an external function.
   Region &body = op->getRegion(0);
diff --git a/mlir/test/Dialect/GPU/outlining.mlir b/mlir/test/Dialect/GPU/outlining.mlir
index 0a4a3d9b012..62c87df3e77 100644
--- a/mlir/test/Dialect/GPU/outlining.mlir
+++ b/mlir/test/Dialect/GPU/outlining.mlir
@@ -40,7 +40,7 @@ func @launch() {
 // CHECK-LABEL: module @launch_kernel
 // CHECK-NEXT: func @launch_kernel
 // CHECK-SAME: (%[[KERNEL_ARG0:.*]]: f32, %[[KERNEL_ARG1:.*]]: memref<?xf32, 1>)
-// CHECK-NEXT: attributes {gpu.kernel}
+// CHECK:      attributes {gpu.kernel}
 // CHECK-NEXT: %[[BID:.*]] = "gpu.block_id"() {dimension = "x"} : () -> index
 // CHECK-NEXT: = "gpu.block_id"() {dimension = "y"} : () -> index
 // CHECK-NEXT: = "gpu.block_id"() {dimension = "z"} : () -> index
diff --git a/mlir/test/Dialect/LLVMIR/func.mlir b/mlir/test/Dialect/LLVMIR/func.mlir
index 348ad7ae1b5..6955cd0397a 100644
--- a/mlir/test/Dialect/LLVMIR/func.mlir
+++ b/mlir/test/Dialect/LLVMIR/func.mlir
@@ -32,7 +32,7 @@ module {
   }) {sym_name = "baz", type = !llvm<"i64 (i64)">} : () -> ()
 
   // CHECK: llvm.func @qux(!llvm<"i64*"> {llvm.noalias = true}, !llvm.i64)
-  // CHECK-NEXT: attributes  {xxx = {yyy = 42 : i64}}
+  // CHECK: attributes {xxx = {yyy = 42 : i64}}
   "llvm.func"() ({
   }) {sym_name = "qux", type = !llvm<"void (i64*, i64)">,
       arg0 = {llvm.noalias = true}, xxx = {yyy = 42}} : () -> ()
@@ -52,11 +52,11 @@ module {
   }
 
   // CHECK: llvm.func @roundtrip5()
-  // CHECK-NEXT: attributes  {baz = 42 : i64, foo = "bar"}
+  // CHECK: attributes {baz = 42 : i64, foo = "bar"}
   llvm.func @roundtrip5() attributes {foo = "bar", baz = 42}
 
   // CHECK: llvm.func @roundtrip6()
-  // CHECK-NEXT: attributes  {baz = 42 : i64, foo = "bar"}
+  // CHECK: attributes {baz = 42 : i64, foo = "bar"}
   llvm.func @roundtrip6() attributes {foo = "bar", baz = 42} {
     llvm.return
   }
@@ -81,7 +81,7 @@ module {
   }
 
   // CHECK: llvm.func @roundtrip12(%{{.*}}: !llvm<"i32*"> {llvm.noalias = true})
-  // CHECK-NEXT: attributes  {foo = 42 : i32}
+  // CHECK: attributes {foo = 42 : i32}
   llvm.func @roundtrip12(%arg0: !llvm<"i32*"> {llvm.noalias = true})
   attributes {foo = 42 : i32} {
     llvm.return
diff --git a/mlir/test/IR/parser.mlir b/mlir/test/IR/parser.mlir
index a6460b46dd9..41e6d5cefcb 100644
--- a/mlir/test/IR/parser.mlir
+++ b/mlir/test/IR/parser.mlir
@@ -834,7 +834,7 @@ func @unregistered_term(%arg0 : i1) -> i1 {
 
 // CHECK-LABEL: func @dialect_attrs
 func @dialect_attrs()
-    // CHECK-NEXT: attributes  {dialect.attr = 10
+    // CHECK: attributes  {dialect.attr = 10
     attributes {dialect.attr = 10} {
   return
 }
@@ -1114,7 +1114,7 @@ func @"\"_string_symbol_reference\""() {
 }
 
 // CHECK-LABEL: func @nested_reference
-// CHECK-NEXT: ref = @some_symbol::@some_nested_symbol
+// CHECK: ref = @some_symbol::@some_nested_symbol
 func @nested_reference() attributes {test.ref = @some_symbol::@some_nested_symbol }
 
 // CHECK-LABEL: func @custom_asm_names
diff --git a/mlir/test/IR/test-symbol-rauw.mlir b/mlir/test/IR/test-symbol-rauw.mlir
index f0f1cbaad32..963875e762e 100644
--- a/mlir/test/IR/test-symbol-rauw.mlir
+++ b/mlir/test/IR/test-symbol-rauw.mlir
@@ -9,7 +9,7 @@ module attributes {sym.outside_use = @symbol_foo } {
   func @symbol_foo() attributes {sym.new_name = "replaced_foo" }
 
   // CHECK: func @symbol_bar
-  // CHECK-NEXT: @replaced_foo
+  // CHECK: @replaced_foo
   func @symbol_bar() attributes {sym.use = @symbol_foo} {
     // CHECK: foo.op
     // CHECK-SAME: non_symbol_attr,