1 files changed, 6 insertions, 8 deletions
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 0da7a19debe..0b9271b1d31 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -2577,16 +2577,14 @@ ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
 
 Value *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
   TestAndClearIgnoreResultAssign();
-  Value *Op = Visit(E->getSubExpr());
-
-  // Generate a unary FNeg for FP ops.
-  if (Op->getType()->isFPOrFPVectorTy())
-    return Builder.CreateFNeg(Op, "fneg");
-
   // Emit unary minus with EmitSub so we handle overflow cases etc.
   BinOpInfo BinOp;
-  BinOp.RHS = Op;
-  BinOp.LHS = llvm::Constant::getNullValue(BinOp.RHS->getType());
+  BinOp.RHS = Visit(E->getSubExpr());
+
+  if (BinOp.RHS->getType()->isFPOrFPVectorTy())
+    BinOp.LHS = llvm::ConstantFP::getZeroValueForNegation(BinOp.RHS->getType());
+  else
+    BinOp.LHS = llvm::Constant::getNullValue(BinOp.RHS->getType());
   BinOp.Ty = E->getType();
   BinOp.Opcode = BO_Sub;
   // FIXME: once UnaryOperator carries FPFeatures, copy it here.