1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp b/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
index 1e84a7216013..fb5383b3514a 100644
--- a/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
+++ b/llvm/lib/Target/DirectX/DXILIntrinsicExpansion.cpp
@@ -56,6 +56,7 @@ static bool isIntrinsicExpansion(Function &F) {
   case Intrinsic::dx_clamp:
   case Intrinsic::dx_cross:
   case Intrinsic::dx_uclamp:
+  case Intrinsic::dx_degrees:
   case Intrinsic::dx_lerp:
   case Intrinsic::dx_length:
   case Intrinsic::dx_normalize:
@@ -490,6 +491,14 @@ static Value *expandClampIntrinsic(CallInst *Orig,
                                  {MaxCall, Max}, nullptr, "dx.min");
 }
 
+static Value *expandDegreesIntrinsic(CallInst *Orig) {
+  Value *X = Orig->getOperand(0);
+  Type *Ty = X->getType();
+  IRBuilder<> Builder(Orig);
+  Value *DegreesRatio = ConstantFP::get(Ty, 180.0 * llvm::numbers::inv_pi);
+  return Builder.CreateFMul(X, DegreesRatio);
+}
+
 static Value *expandSignIntrinsic(CallInst *Orig) {
   Value *X = Orig->getOperand(0);
   Type *Ty = X->getType();
@@ -549,6 +558,9 @@ static bool expandIntrinsic(Function &F, CallInst *Orig) {
   case Intrinsic::dx_clamp:
     Result = expandClampIntrinsic(Orig, IntrinsicId);
     break;
+  case Intrinsic::dx_degrees:
+    Result = expandDegreesIntrinsic(Orig);
+    break;
   case Intrinsic::dx_lerp:
     Result = expandLerpIntrinsic(Orig);
     break;