3 files changed, 24 insertions, 2 deletions
diff --git a/src/qml/jit/qv4assembler.cpp b/src/qml/jit/qv4assembler.cpp
index c9a2b7c451..be6c03ab8f 100644
--- a/src/qml/jit/qv4assembler.cpp
+++ b/src/qml/jit/qv4assembler.cpp
@@ -680,6 +680,12 @@ struct PlatformAssembler64 : PlatformAssemblerCommon
         store64(AccumulatorRegister, addr);
     }
 
+    void moveReg(Address sourceRegAddress, Address destRegAddress)
+    {
+        load64(sourceRegAddress, ScratchRegister);
+        store64(ScratchRegister, destRegAddress);
+    }
+
     void loadString(int stringId)
     {
         loadAccumulator(loadStringAddress(stringId));
@@ -951,6 +957,16 @@ struct PlatformAssembler32 : PlatformAssemblerCommon
         store32(AccumulatorRegisterTag, addr);
     }
 
+    void moveReg(Address sourceRegAddress, Address destRegAddress)
+    {
+        load32(sourceRegAddress, ReturnValueRegisterValue);
+        sourceRegAddress.offset += 4;
+        load32(sourceRegAddress, ReturnValueRegisterTag);
+        store32(ReturnValueRegisterValue, destRegAddress);
+        destRegAddress.offset += 4;
+        store32(ReturnValueRegisterTag, destRegAddress);
+    }
+
     void loadString(int stringId)
     {
         load32(loadStringAddress(stringId), AccumulatorRegisterValue);
@@ -1443,6 +1459,11 @@ void Assembler::loadReg(int reg)
     pasm()->loadAccumulator(regAddr(reg));
 }
 
+void JIT::Assembler::moveReg(int sourceReg, int destReg)
+{
+    pasm()->moveReg(regAddr(sourceReg), regAddr(destReg));
+}
+
 void Assembler::storeReg(int reg)
 {
     pasm()->storeAccumulator(regAddr(reg));
diff --git a/src/qml/jit/qv4assembler_p.h b/src/qml/jit/qv4assembler_p.h
index ac30a534df..2cf59f53ee 100644
--- a/src/qml/jit/qv4assembler_p.h
+++ b/src/qml/jit/qv4assembler_p.h
@@ -90,6 +90,7 @@ public:
     void loadConst(int constIndex);
     void copyConst(int constIndex, int destReg);
     void loadReg(int reg);
+    void moveReg(int sourceReg, int destReg);
     void storeReg(int reg);
     void loadLocal(int index, int level = 0);
     void storeLocal(int index, int level = 0);
diff --git a/src/qml/jit/qv4baselinejit.cpp b/src/qml/jit/qv4baselinejit.cpp
index c813ff7f2d..3e8991122f 100644
--- a/src/qml/jit/qv4baselinejit.cpp
+++ b/src/qml/jit/qv4baselinejit.cpp
@@ -135,8 +135,8 @@ void BaselineJIT::generate_StoreReg(int reg)
 
 void BaselineJIT::generate_MoveReg(int srcReg, int destReg)
 {
-    as->loadReg(srcReg);
-    as->storeReg(destReg);
+    // Don't clobber the accumulator.
+    as->moveReg(srcReg, destReg);
 }
 
 void BaselineJIT::generate_LoadLocal(int index)