ARM: Replace branch with conditional store in function prologue.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index a73d6a2d87dfef7016436f8391672da638103ceb..e7ec59cfa89d39d11270f1664d8342511351b954 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -121,13 +121,10 @@ bool LCodeGen::GeneratePrologue() {
     // receiver object). r5 is zero for method calls and non-zero for
     // function calls.
     if (!info_->is_classic_mode() || info_->is_native()) {
-      Label ok;
       __ cmp(r5, Operand::Zero());
-      __ b(eq, &ok);
       int receiver_offset = scope()->num_parameters() * kPointerSize;
       __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
-      __ str(r2, MemOperand(sp, receiver_offset));
-      __ bind(&ok);
+      __ str(r2, MemOperand(sp, receiver_offset), ne);
     }
   }