1 files changed, 37 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 608e9d9a16d..5bc03f3b949 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -1689,6 +1689,8 @@ Value *CodeGenFunction::EmitTargetBuiltinExpr(unsigned BuiltinID,
   case llvm::Triple::ppc64:
   case llvm::Triple::ppc64le:
     return EmitPPCBuiltinExpr(BuiltinID, E);
+  case llvm::Triple::r600:
+    return EmitR600BuiltinExpr(BuiltinID, E);
   default:
     return nullptr;
   }
@@ -5922,3 +5924,38 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
   }
   }
 }
+
+Value *CodeGenFunction::EmitR600BuiltinExpr(unsigned BuiltinID,
+                                            const CallExpr *E) {
+  switch (BuiltinID) {
+  case R600::BI__builtin_amdgpu_div_scale:
+  case R600::BI__builtin_amdgpu_div_scalef: {
+    // Translate from the intrinsics's struct return to the builtin's out
+    // argument.
+
+    std::pair<llvm::Value *, unsigned> FlagOutPtr
+      = EmitPointerWithAlignment(E->getArg(3));
+
+    llvm::Value *X = EmitScalarExpr(E->getArg(0));
+    llvm::Value *Y = EmitScalarExpr(E->getArg(1));
+    llvm::Value *Z = EmitScalarExpr(E->getArg(2));
+
+    llvm::Value *Callee = CGM.getIntrinsic(Intrinsic::AMDGPU_div_scale,
+                                           X->getType());
+
+    llvm::Value *Tmp = Builder.CreateCall3(Callee, X, Y, Z);
+
+    llvm::Value *Result = Builder.CreateExtractValue(Tmp, 0);
+    llvm::Value *Flag = Builder.CreateExtractValue(Tmp, 1);
+
+    llvm::Type *RealFlagType
+      = FlagOutPtr.first->getType()->getPointerElementType();
+
+    llvm::Value *FlagExt = Builder.CreateZExt(Flag, RealFlagType);
+    llvm::StoreInst *FlagStore = Builder.CreateStore(FlagExt, FlagOutPtr.first);
+    FlagStore->setAlignment(FlagOutPtr.second);
+    return Result;
+  } default:
+    return nullptr;
+  }
+}