[arm] Fix a double-register push operation.

src/arm/lithium-gap-resolver-arm.cc

Index: src/arm/lithium-gap-resolver-arm.cc
diff --git a/src/arm/lithium-gap-resolver-arm.cc b/src/arm/lithium-gap-resolver-arm.cc
index 31feb11edc8c7d80b1937d77e0f472a861ee0eb6..e1bd47b2ec034fed49e4dc7f5b061056029a703e 100644
--- a/src/arm/lithium-gap-resolver-arm.cc
+++ b/src/arm/lithium-gap-resolver-arm.cc
@@ -278,10 +278,10 @@ void LGapResolver::EmitMove(int index) {
       MemOperand destination_operand = cgen_->ToMemOperand(destination);
       if (in_cycle_) {
         // kScratchDoubleReg was used to break the cycle.
-        __ vstm(db_w, sp, kScratchDoubleReg, kScratchDoubleReg);
+        __ vpush(kScratchDoubleReg);
         __ vldr(kScratchDoubleReg, source_operand);
         __ vstr(kScratchDoubleReg, destination_operand);
-        __ vldm(ia_w, sp, kScratchDoubleReg, kScratchDoubleReg);
+        __ vpop(kScratchDoubleReg);
       } else {
         __ vldr(kScratchDoubleReg, source_operand);
         __ vstr(kScratchDoubleReg, destination_operand);