alexey.lapshin updated this revision to Diff 178264.
alexey.lapshin added a comment.

deleted small typo in CGLoopInfo.cpp


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55710/new/

https://reviews.llvm.org/D55710

Files:
  include/clang/Basic/Attr.td
  include/clang/Basic/AttrDocs.td
  include/clang/Basic/DiagnosticParseKinds.td
  lib/CodeGen/CGLoopInfo.cpp
  lib/CodeGen/CGLoopInfo.h
  lib/Parse/ParsePragma.cpp
  lib/Sema/SemaStmtAttr.cpp
  test/CodeGenCXX/pragma-pipeline.cpp
  test/Parser/pragma-loop.cpp
  test/Parser/pragma-pipeline.cpp
  test/Parser/pragma-unroll-and-jam.cpp

Index: test/Parser/pragma-unroll-and-jam.cpp
===================================================================
--- test/Parser/pragma-unroll-and-jam.cpp
+++ test/Parser/pragma-unroll-and-jam.cpp
@@ -67,7 +67,7 @@
   }
 
 // pragma clang unroll_and_jam is disabled for the moment
-/* expected-error {{invalid option 'unroll_and_jam'; expected vectorize, vectorize_width, interleave, interleave_count, unroll, unroll_count, or distribute}} */ #pragma clang loop unroll_and_jam(4)
+/* expected-error {{invalid option 'unroll_and_jam'; expected vectorize, vectorize_width, interleave, interleave_count, unroll, unroll_count, pipeline, pipeline_ii_count or distribute}} */ #pragma clang loop unroll_and_jam(4)
   for (int i = 0; i < Length; i++) {
     for (int j = 0; j < Length; j++) {
       List[i * Length + j] = Value;
Index: test/Parser/pragma-pipeline.cpp
===================================================================
--- /dev/null
+++ test/Parser/pragma-pipeline.cpp
@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 -std=c++11 -verify %s
+
+// Note that this puts the expected lines before the directives to work around
+// limitations in the -verify mode.
+
+void test(int *List, int Length, int Value) {
+  int i = 0;
+
+#pragma clang loop pipeline(disable) 
+  for (int i = 0; i < Length; i++) {
+      List[i] = Value;
+  }
+
+#pragma clang loop pipeline_ii_count(10) 
+  for (int i = 0; i < Length; i++) {
+      List[i] = Value;
+  }
+
+/* expected-error {{expected ')'}} */ #pragma clang loop pipeline(disable
+/* expected-error {{invalid argument; expected 'disable'}} */ #pragma clang loop pipeline(enable)
+/* expected-error {{invalid argument; expected 'disable'}} */ #pragma clang loop pipeline(error)
+/* expected-error {{missing argument; expected an integer value}} */ #pragma clang loop pipeline_ii_count()
+/* expected-error {{use of undeclared identifier 'error'}} */ #pragma clang loop pipeline_ii_count(error)
+/* expected-error {{expected '('}} */ #pragma clang loop pipeline_ii_count 1 2
+  for (int i = 0; i < Length; i++) {
+    for (int j = 0; j < Length; j++) {
+      List[i * Length + j] = Value;
+    }
+  }
+
+#pragma clang loop pipeline(disable) 
+/* expected-error {{expected a for, while, or do-while loop to follow '#pragma clang loop'}} */ int j = Length;
+#pragma clang loop pipeline_ii_count(4) 
+/* expected-error {{expected a for, while, or do-while loop to follow '#pragma clang loop'}} */ int k = Length;
+
+#pragma clang loop pipeline(disable)
+#pragma clang loop pipeline_ii_count(4) /* expected-error {{incompatible directives 'pipeline(disable)' and 'pipeline_ii_count(4)'}} */
+  for (int i = 0; i < Length; i++) {
+      List[i] = Value;
+  }
+
+#pragma clang loop pipeline(disable) 
+/* expected-error {{expected statement}} */ }
Index: test/Parser/pragma-loop.cpp
===================================================================
--- test/Parser/pragma-loop.cpp
+++ test/Parser/pragma-loop.cpp
@@ -147,7 +147,7 @@
 /* expected-error {{missing argument; expected 'enable', 'full' or 'disable'}} */ #pragma clang loop unroll()
 /* expected-error {{missing argument; expected 'enable' or 'disable'}} */ #pragma clang loop distribute()
 
-/* expected-error {{missing option; expected vectorize, vectorize_width, interleave, interleave_count, unroll, unroll_count, or distribute}} */ #pragma clang loop
+/* expected-error {{missing option; expected vectorize, vectorize_width, interleave, interleave_count, unroll, unroll_count, pipeline, pipeline_ii_count or distribute}} */ #pragma clang loop
 /* expected-error {{invalid option 'badkeyword'}} */ #pragma clang loop badkeyword
 /* expected-error {{invalid option 'badkeyword'}} */ #pragma clang loop badkeyword(enable)
 /* expected-error {{invalid option 'badkeyword'}} */ #pragma clang loop vectorize(enable) badkeyword(4)
Index: test/CodeGenCXX/pragma-pipeline.cpp
===================================================================
--- /dev/null
+++ test/CodeGenCXX/pragma-pipeline.cpp
@@ -0,0 +1,47 @@
+// RUN: %clang_cc1 -triple hexagon -std=c++11 -emit-llvm -o - %s | FileCheck %s
+
+void pipeline_disabled(int *List, int Length, int Value) {
+  // CHECK-LABEL: define {{.*}} @_Z17pipeline_disabled 
+#pragma clang loop pipeline(disable) 
+  for (int i = 0; i < Length; i++) {
+      // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
+      List[i] = Value;
+  }
+}
+
+void pipeline_not_disabled(int *List, int Length, int Value) {
+  // CHECK-LABEL: define {{.*}} @_Z21pipeline_not_disabled 
+  for (int i = 0; i < Length; i++) {
+      List[i] = Value;
+  }
+}
+
+void pipeline_ii_count(int *List, int Length, int Value) {
+  // CHECK-LABEL: define {{.*}} @_Z17pipeline_ii_count
+#pragma clang loop pipeline_ii_count(10) 
+  for (int i = 0; i < Length; i++) {
+      // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
+      List[i] = Value;
+  }
+}
+
+void pipeline_disabled_on_nested_loop(int *List, int Length, int Value) {
+  // CHECK-LABEL: define {{.*}} @_Z32pipeline_disabled_on_nested_loop
+  for (int i = 0; i < Length; i++) {
+#pragma clang loop pipeline(disable)    
+    for (int j = 0; j < Length; j++) { 
+      // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
+      List[i*Length + j] = Value;
+    }
+  }
+}
+
+// CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[PIPELINE_DISABLE:.*]]}
+// CHECK: ![[PIPELINE_DISABLE]] = !{!"llvm.loop.pipeline.disable", i1 true}
+
+// CHECK-NOT:llvm.loop.pipeline
+
+// CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[PIPELINE_II_10:.*]]}
+// CHECK: ![[PIPELINE_II_10]] = !{!"llvm.loop.pipeline.iicount", i32 10}
+
+// CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[PIPELINE_DISABLE]]}
Index: lib/Sema/SemaStmtAttr.cpp
===================================================================
--- lib/Sema/SemaStmtAttr.cpp
+++ lib/Sema/SemaStmtAttr.cpp
@@ -147,11 +147,15 @@
                  .Case("interleave_count", LoopHintAttr::InterleaveCount)
                  .Case("unroll", LoopHintAttr::Unroll)
                  .Case("unroll_count", LoopHintAttr::UnrollCount)
+                 .Case("pipeline", LoopHintAttr::PipelineDisabled)
+                 .Case("pipeline_ii_count", LoopHintAttr::PipelineIICount)
                  .Case("distribute", LoopHintAttr::Distribute)
                  .Default(LoopHintAttr::Vectorize);
     if (Option == LoopHintAttr::VectorizeWidth ||
         Option == LoopHintAttr::InterleaveCount ||
-        Option == LoopHintAttr::UnrollCount) {
+        Option == LoopHintAttr::UnrollCount ||
+        Option == LoopHintAttr::PipelineIICount
+        ) {
       assert(ValueExpr && "Attribute must have a valid value expression.");
       if (S.CheckLoopHintExpr(ValueExpr, St->getBeginLoc()))
         return nullptr;
@@ -159,7 +163,8 @@
     } else if (Option == LoopHintAttr::Vectorize ||
                Option == LoopHintAttr::Interleave ||
                Option == LoopHintAttr::Unroll ||
-               Option == LoopHintAttr::Distribute) {
+               Option == LoopHintAttr::Distribute ||
+               Option == LoopHintAttr::PipelineDisabled) {
       assert(StateLoc && StateLoc->Ident && "Loop hint must have an argument");
       if (StateLoc->Ident->isStr("disable"))
         State = LoopHintAttr::Disable;
@@ -182,8 +187,8 @@
 static void
 CheckForIncompatibleAttributes(Sema &S,
                                const SmallVectorImpl<const Attr *> &Attrs) {
-  // There are 5 categories of loop hints attributes: vectorize, interleave,
-  // unroll, unroll_and_jam and distribute. Except for distribute they come
+  // There are 6 categories of loop hints attributes: vectorize, interleave,
+  // unroll, unroll_and_jam, pipeline and distribute. Except for distribute they come
   // in two variants: a state form and a numeric form.  The state form
   // selectively defaults/enables/disables the transformation for the loop
   // (for unroll, default indicates full unrolling rather than enabling the
@@ -198,6 +203,7 @@
                    {nullptr, nullptr},
                    {nullptr, nullptr},
                    {nullptr, nullptr},
+                   {nullptr, nullptr},
                    {nullptr, nullptr}};
 
   for (const auto *I : Attrs) {
@@ -208,7 +214,7 @@
       continue;
 
     LoopHintAttr::OptionType Option = LH->getOption();
-    enum { Vectorize, Interleave, Unroll, UnrollAndJam, Distribute } Category;
+    enum { Vectorize, Interleave, Unroll, UnrollAndJam, Distribute, Pipeline } Category;
     switch (Option) {
     case LoopHintAttr::Vectorize:
     case LoopHintAttr::VectorizeWidth:
@@ -230,6 +236,10 @@
       // Perform the check for duplicated 'distribute' hints.
       Category = Distribute;
       break;
+    case LoopHintAttr::PipelineDisabled:
+    case LoopHintAttr::PipelineIICount:
+      Category = Pipeline;
+      break;
     };
 
     assert(Category < sizeof(HintAttrs) / sizeof(HintAttrs[0]));
@@ -238,6 +248,7 @@
     if (Option == LoopHintAttr::Vectorize ||
         Option == LoopHintAttr::Interleave || Option == LoopHintAttr::Unroll ||
         Option == LoopHintAttr::UnrollAndJam ||
+        Option == LoopHintAttr::PipelineDisabled ||
         Option == LoopHintAttr::Distribute) {
       // Enable|Disable|AssumeSafety hint.  For example, vectorize(enable).
       PrevAttr = CategoryState.StateAttr;
Index: lib/Parse/ParsePragma.cpp
===================================================================
--- lib/Parse/ParsePragma.cpp
+++ lib/Parse/ParsePragma.cpp
@@ -1057,20 +1057,23 @@
   bool OptionUnroll = false;
   bool OptionUnrollAndJam = false;
   bool OptionDistribute = false;
+  bool OptionPipelineDisabled = false;
   bool StateOption = false;
   if (OptionInfo) { // Pragma Unroll does not specify an option.
     OptionUnroll = OptionInfo->isStr("unroll");
     OptionUnrollAndJam = OptionInfo->isStr("unroll_and_jam");
     OptionDistribute = OptionInfo->isStr("distribute");
+    OptionPipelineDisabled = OptionInfo->isStr("pipeline");
     StateOption = llvm::StringSwitch<bool>(OptionInfo->getName())
                       .Case("vectorize", true)
                       .Case("interleave", true)
                       .Default(false) ||
-                  OptionUnroll || OptionUnrollAndJam || OptionDistribute;
+                  OptionUnroll || OptionUnrollAndJam ||
+                  OptionDistribute || OptionPipelineDisabled;
   }
 
   bool AssumeSafetyArg =
-      !OptionUnroll && !OptionUnrollAndJam && !OptionDistribute;
+      !OptionUnroll && !OptionUnrollAndJam && !OptionDistribute && !OptionPipelineDisabled;
   // Verify loop hint has an argument.
   if (Toks[0].is(tok::eof)) {
     ConsumeAnnotationToken();
@@ -1089,14 +1092,19 @@
 
     bool Valid =
         StateInfo && llvm::StringSwitch<bool>(StateInfo->getName())
-                         .Cases("enable", "disable", true)
+                         .Case("disable", true)
+                         .Case("enable", !OptionPipelineDisabled)
                          .Case("full", OptionUnroll || OptionUnrollAndJam)
                          .Case("assume_safety", AssumeSafetyArg)
                          .Default(false);
     if (!Valid) {
-      Diag(Toks[0].getLocation(), diag::err_pragma_invalid_keyword)
-          << /*FullKeyword=*/(OptionUnroll || OptionUnrollAndJam)
-          << /*AssumeSafetyKeyword=*/AssumeSafetyArg;
+      if(OptionPipelineDisabled) {
+          Diag(Toks[0].getLocation(), diag::err_pragma_pipeline_invalid_keyword);
+      } else {
+        Diag(Toks[0].getLocation(), diag::err_pragma_invalid_keyword)
+            << /*FullKeyword=*/(OptionUnroll || OptionUnrollAndJam)
+            << /*AssumeSafetyKeyword=*/AssumeSafetyArg;
+      }
       return false;
     }
     if (Toks.size() > 2)
@@ -2809,6 +2817,8 @@
 ///    'vectorize_width' '(' loop-hint-value ')'
 ///    'interleave_count' '(' loop-hint-value ')'
 ///    'unroll_count' '(' loop-hint-value ')'
+///    'pipeline' '(' disable ')'
+///    'pipeline_ii_count' '(' loop-hint-value ')'
 ///
 ///  loop-hint-keyword:
 ///    'enable'
@@ -2868,6 +2878,8 @@
                            .Case("vectorize_width", true)
                            .Case("interleave_count", true)
                            .Case("unroll_count", true)
+                           .Case("pipeline", true)
+                           .Case("pipeline_ii_count", true)
                            .Default(false);
     if (!OptionValid) {
       PP.Diag(Tok.getLocation(), diag::err_pragma_loop_invalid_option)
Index: lib/CodeGen/CGLoopInfo.h
===================================================================
--- lib/CodeGen/CGLoopInfo.h
+++ lib/CodeGen/CGLoopInfo.h
@@ -66,6 +66,12 @@
 
   /// Value for llvm.loop.distribute.enable metadata.
   LVEnableState DistributeEnable;
+
+  /// Value for llvm.loop.pipeline.disable metadata
+  bool PipelineDisabled;
+
+  /// Value for llvm.loop.pipeline.iicount metadata
+  unsigned PipelineIICount;
 };
 
 /// Information used when generating a structured loop.
@@ -166,6 +172,12 @@
   /// \brief Set the unroll count for the next loop pushed.
   void setUnrollAndJamCount(unsigned C) { StagedAttrs.UnrollAndJamCount = C; }
 
+  /// Set the pipeline disabled state
+  void setPipelineDisabled(bool S) { StagedAttrs.PipelineDisabled = S; }
+
+  /// Set the pipeline ii count
+  void setPipelineIICount(unsigned C) { StagedAttrs.PipelineIICount = C; }
+
 private:
   /// Returns true if there is LoopInfo on the stack.
   bool hasInfo() const { return !Active.empty(); }
Index: lib/CodeGen/CGLoopInfo.cpp
===================================================================
--- lib/CodeGen/CGLoopInfo.cpp
+++ lib/CodeGen/CGLoopInfo.cpp
@@ -26,6 +26,8 @@
   if (!Attrs.IsParallel && Attrs.VectorizeWidth == 0 &&
       Attrs.InterleaveCount == 0 && Attrs.UnrollCount == 0 &&
       Attrs.UnrollAndJamCount == 0 &&
+      Attrs.PipelineDisabled == false &&
+      Attrs.PipelineIICount == 0 &&
       Attrs.VectorizeEnable == LoopAttributes::Unspecified &&
       Attrs.UnrollEnable == LoopAttributes::Unspecified &&
       Attrs.UnrollAndJamEnable == LoopAttributes::Unspecified &&
@@ -122,6 +124,20 @@
     Args.push_back(MDNode::get(Ctx, Vals));
   }
 
+  if(Attrs.PipelineDisabled){
+      Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.pipeline.disable"),
+                          ConstantAsMetadata::get(ConstantInt::get(
+                              Type::getInt1Ty(Ctx), (Attrs.PipelineDisabled == true)))};
+      Args.push_back(MDNode::get(Ctx, Vals));
+  }
+
+  if(Attrs.PipelineIICount > 0){
+      Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.pipeline.iicount"),
+                          ConstantAsMetadata::get(ConstantInt::get(
+                              Type::getInt32Ty(Ctx), Attrs.PipelineIICount))};
+      Args.push_back(MDNode::get(Ctx, Vals));
+  }
+
   // Set the first operand to itself.
   MDNode *LoopID = MDNode::get(Ctx, Args);
   LoopID->replaceOperandWith(0, LoopID);
@@ -133,7 +149,8 @@
       UnrollEnable(LoopAttributes::Unspecified),
       UnrollAndJamEnable(LoopAttributes::Unspecified), VectorizeWidth(0),
       InterleaveCount(0), UnrollCount(0), UnrollAndJamCount(0),
-      DistributeEnable(LoopAttributes::Unspecified) {}
+      DistributeEnable(LoopAttributes::Unspecified),
+      PipelineDisabled(false), PipelineIICount(0) {}
 
 void LoopAttributes::clear() {
   IsParallel = false;
@@ -145,6 +162,8 @@
   UnrollEnable = LoopAttributes::Unspecified;
   UnrollAndJamEnable = LoopAttributes::Unspecified;
   DistributeEnable = LoopAttributes::Unspecified;
+  PipelineDisabled = false;
+  PipelineIICount = 0;
 }
 
 LoopInfo::LoopInfo(BasicBlock *Header, const LoopAttributes &Attrs,
@@ -223,10 +242,14 @@
       case LoopHintAttr::Distribute:
         setDistributeState(false);
         break;
+      case LoopHintAttr::PipelineDisabled:
+        setPipelineDisabled(true);
+        break;
       case LoopHintAttr::UnrollCount:
       case LoopHintAttr::UnrollAndJamCount:
       case LoopHintAttr::VectorizeWidth:
       case LoopHintAttr::InterleaveCount:
+      case LoopHintAttr::PipelineIICount:
         llvm_unreachable("Options cannot be disabled.");
         break;
       }
@@ -250,6 +273,8 @@
       case LoopHintAttr::UnrollAndJamCount:
       case LoopHintAttr::VectorizeWidth:
       case LoopHintAttr::InterleaveCount:
+      case LoopHintAttr::PipelineDisabled:
+      case LoopHintAttr::PipelineIICount:
         llvm_unreachable("Options cannot enabled.");
         break;
       }
@@ -269,6 +294,8 @@
       case LoopHintAttr::VectorizeWidth:
       case LoopHintAttr::InterleaveCount:
       case LoopHintAttr::Distribute:
+      case LoopHintAttr::PipelineDisabled:
+      case LoopHintAttr::PipelineIICount:
         llvm_unreachable("Options cannot be used to assume mem safety.");
         break;
       }
@@ -288,6 +315,8 @@
       case LoopHintAttr::VectorizeWidth:
       case LoopHintAttr::InterleaveCount:
       case LoopHintAttr::Distribute:
+      case LoopHintAttr::PipelineDisabled:
+      case LoopHintAttr::PipelineIICount:
         llvm_unreachable("Options cannot be used with 'full' hint.");
         break;
       }
@@ -306,11 +335,15 @@
       case LoopHintAttr::UnrollAndJamCount:
         setUnrollAndJamCount(ValueInt);
         break;
+      case LoopHintAttr::PipelineIICount:
+        setPipelineIICount(ValueInt);
+        break;
       case LoopHintAttr::Unroll:
       case LoopHintAttr::UnrollAndJam:
       case LoopHintAttr::Vectorize:
       case LoopHintAttr::Interleave:
       case LoopHintAttr::Distribute:
+      case LoopHintAttr::PipelineDisabled:
         llvm_unreachable("Options cannot be assigned a value.");
         break;
       }
Index: include/clang/Basic/DiagnosticParseKinds.td
===================================================================
--- include/clang/Basic/DiagnosticParseKinds.td
+++ include/clang/Basic/DiagnosticParseKinds.td
@@ -1175,7 +1175,7 @@
   "'enable'%select{|, 'full'}1%select{|, 'assume_safety'}2 or 'disable'}0">;
 def err_pragma_loop_invalid_option : Error<
   "%select{invalid|missing}0 option%select{ %1|}0; expected vectorize, "
-  "vectorize_width, interleave, interleave_count, unroll, unroll_count, or distribute">;
+  "vectorize_width, interleave, interleave_count, unroll, unroll_count, pipeline, pipeline_ii_count or distribute">;
 
 def err_pragma_fp_invalid_option : Error<
   "%select{invalid|missing}0 option%select{ %1|}0; expected contract">;
@@ -1188,6 +1188,8 @@
 
 def err_pragma_invalid_keyword : Error<
   "invalid argument; expected 'enable'%select{|, 'full'}0%select{|, 'assume_safety'}1 or 'disable'">;
+def err_pragma_pipeline_invalid_keyword : Error<
+    "invalid argument; expected 'disable'">;
 
 // Pragma unroll support.
 def warn_pragma_unroll_cuda_value_in_parens : Warning<
Index: include/clang/Basic/AttrDocs.td
===================================================================
--- include/clang/Basic/AttrDocs.td
+++ include/clang/Basic/AttrDocs.td
@@ -2579,9 +2579,9 @@
   let Content = [{
 The ``#pragma clang loop`` directive allows loop optimization hints to be
 specified for the subsequent loop. The directive allows vectorization,
-interleaving, and unrolling to be enabled or disabled. Vector width as well
-as interleave and unrolling count can be manually specified. See
-`language extensions
+interleaving, and unrolling to be enabled or disabled. Pipelining could be disabled.
+Vector width as well as interleave, unrolling count and Initiation interval for pipelining
+can be manually specified. See `language extensions
 <http://clang.llvm.org/docs/LanguageExtensions.html#extensions-for-loop-hint-optimizations>`_
 for details.
   }];
@@ -2642,6 +2642,43 @@
   }];
 }
 
+def PipelineHintDocs : Documentation {
+  let Category = DocCatStmt;
+  let Heading = "#pragma clang loop pipeline, #pragma clang loop pipeline_ii_count";
+  let Content = [{
+Loop pipelining optimization hints can be specified with ``#pragma clang loop pipeline`` and
+``#pragma loop pipeline_ii_count``. The pragma is placed immediately before a for, while,
+do-while, or c++11 range-based for loop.
+
+Specifying ``#pragma clang loop pipeline(disable)`` avoids software pipelining optimization.
+Only `disable` state could be specified for ``#pragma clang loop pipeline``:
+
+.. code-block:: c++
+
+  #pragma clang loop pipeline(disable)
+  for (...) {
+    ...
+  }
+
+Specifying the ii count parameter for ``#pragma loop pipeline_ii_count`` instructs software
+pipeliner to use only specified initiation interval :
+
+.. code-block:: c++
+
+  #pragma loop pipeline_ii_count(10)
+  for (...) {
+    ...
+  }
+
+See
+`language extensions
+<http://clang.llvm.org/docs/LanguageExtensions.html#extensions-for-loop-hint-optimizations>`_
+for further details including limitations of the pipeline hints.
+  }];
+}
+
+
+
 def OpenCLUnrollHintDocs : Documentation {
   let Category = DocCatStmt;
   let Content = [{
Index: include/clang/Basic/Attr.td
===================================================================
--- include/clang/Basic/Attr.td
+++ include/clang/Basic/Attr.td
@@ -2868,6 +2868,8 @@
   /// unroll_and_jam: attempt to unroll and jam loop if State == Enable.
   /// unroll_and_jam_count: unroll and jams loop 'Value' times.
   /// distribute: attempt to distribute loop if State == Enable
+  /// pipeline: disable pipelining loop if State == Disable
+  /// pipeline_ii_count: try to pipeline loop for only 'Value' value
 
   /// #pragma unroll <argument> directive
   /// <no arg>: fully unrolls loop.
@@ -2882,10 +2884,10 @@
   let Args = [EnumArgument<"Option", "OptionType",
                           ["vectorize", "vectorize_width", "interleave", "interleave_count",
                            "unroll", "unroll_count", "unroll_and_jam", "unroll_and_jam_count",
-                           "distribute"],
+                           "pipeline", "pipeline_ii_count", "distribute"],
                           ["Vectorize", "VectorizeWidth", "Interleave", "InterleaveCount",
                            "Unroll", "UnrollCount", "UnrollAndJam", "UnrollAndJamCount",
-                           "Distribute"]>,
+                           "PipelineDisabled", "PipelineIICount", "Distribute"]>,
               EnumArgument<"State", "LoopHintState",
                            ["enable", "disable", "numeric", "assume_safety", "full"],
                            ["Enable", "Disable", "Numeric", "AssumeSafety", "Full"]>,
@@ -2902,6 +2904,8 @@
     case UnrollCount: return "unroll_count";
     case UnrollAndJam: return "unroll_and_jam";
     case UnrollAndJamCount: return "unroll_and_jam_count";
+    case PipelineDisabled: return "pipeline";
+    case PipelineIICount: return "pipeline_ii_count";
     case Distribute: return "distribute";
     }
     llvm_unreachable("Unhandled LoopHint option.");
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