Version 4.2.21.1 (cherry-pick)

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 045cc108bb24c888a9e7346a70fe22f684ce46cf..8d79ba6512b5442c3937f63f2c9d95f746ed4fbb 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -748,8 +748,7 @@ LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
     LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
-    return CpuFeatures::IsSupported(AVX) ? DefineAsRegister(result)
-                                         : DefineSameAsFirst(result);
+    return DefineSameAsFirst(result);
   }
 }