Revert #116331 & #121852 (#122105)

3 files changed, 1 insertions, 34 deletions

diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index c8ff48f..a87c50b 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -757,8 +757,6 @@ void CodeGenFunction::EmitAttributedStmt(const AttributedStmt &S) {
   bool noinline = false;
   bool alwaysinline = false;
   bool noconvergent = false;
-  HLSLControlFlowHintAttr::Spelling flattenOrBranch =
-      HLSLControlFlowHintAttr::SpellingNotCalculated;
   const CallExpr *musttail = nullptr;
 
   for (const auto *A : S.getAttrs()) {
@@ -790,9 +788,6 @@ void CodeGenFunction::EmitAttributedStmt(const AttributedStmt &S) {
         Builder.CreateAssumption(AssumptionVal);
       }
     } break;
-    case attr::HLSLControlFlowHint: {
-      flattenOrBranch = cast<HLSLControlFlowHintAttr>(A)->getSemanticSpelling();
-    } break;
     }
   }
   SaveAndRestore save_nomerge(InNoMergeAttributedStmt, nomerge);
@@ -800,7 +795,6 @@ void CodeGenFunction::EmitAttributedStmt(const AttributedStmt &S) {
   SaveAndRestore save_alwaysinline(InAlwaysInlineAttributedStmt, alwaysinline);
   SaveAndRestore save_noconvergent(InNoConvergentAttributedStmt, noconvergent);
   SaveAndRestore save_musttail(MustTailCall, musttail);
-  SaveAndRestore save_flattenOrBranch(HLSLControlFlowAttr, flattenOrBranch);
   EmitStmt(S.getSubStmt(), S.getAttrs());
 }
 
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 067ff55..af58fa6 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -40,7 +40,6 @@
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/FPEnv.h"
-#include "llvm/IR/Instruction.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/MDBuilder.h"
@@ -2084,29 +2083,7 @@ void CodeGenFunction::EmitBranchOnBoolExpr(
     Weights = createProfileWeights(TrueCount, CurrentCount - TrueCount);
   }
 
-  llvm::Instruction *BrInst = Builder.CreateCondBr(CondV, TrueBlock, FalseBlock,
-                                                   Weights, Unpredictable);
-  switch (HLSLControlFlowAttr) {
-  case HLSLControlFlowHintAttr::Microsoft_branch:
-  case HLSLControlFlowHintAttr::Microsoft_flatten: {
-    llvm::MDBuilder MDHelper(CGM.getLLVMContext());
-
-    llvm::ConstantInt *BranchHintConstant =
-        HLSLControlFlowAttr ==
-                HLSLControlFlowHintAttr::Spelling::Microsoft_branch
-            ? llvm::ConstantInt::get(CGM.Int32Ty, 1)
-            : llvm::ConstantInt::get(CGM.Int32Ty, 2);
-
-    SmallVector<llvm::Metadata *, 2> Vals(
-        {MDHelper.createString("hlsl.controlflow.hint"),
-         MDHelper.createConstant(BranchHintConstant)});
-    BrInst->setMetadata("hlsl.controlflow.hint",
-                        llvm::MDNode::get(CGM.getLLVMContext(), Vals));
-    break;
-  }
-  case HLSLControlFlowHintAttr::SpellingNotCalculated:
-    break;
-  }
+  Builder.CreateCondBr(CondV, TrueBlock, FalseBlock, Weights, Unpredictable);
 }
 
 /// ErrorUnsupported - Print out an error that codegen doesn't support the
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index bc612a0..f2240f8 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -615,10 +615,6 @@ public:
   /// True if the current statement has noconvergent attribute.
   bool InNoConvergentAttributedStmt = false;
 
-  /// HLSL Branch attribute.
-  HLSLControlFlowHintAttr::Spelling HLSLControlFlowAttr =
-      HLSLControlFlowHintAttr::SpellingNotCalculated;
-
   // The CallExpr within the current statement that the musttail attribute
   // applies to.  nullptr if there is no 'musttail' on the current statement.
   const CallExpr *MustTailCall = nullptr;