Speed up comparison with a constant.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index c7378222952ff58c57dde20a29f0ac101213ded2..51978421d88537e0660f9630647087f8c2950f2b 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1425,8 +1425,8 @@ LInstruction* LChunkBuilder::DoCompareIDAndBranch(
   if (r.IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
-    LOperand* left = UseRegisterAtStart(instr->left());
-    LOperand* right = UseRegisterAtStart(instr->right());
+    LOperand* left = UseRegisterOrConstantAtStart(instr->left());
+    LOperand* right = UseRegisterOrConstantAtStart(instr->right());
     return new LCmpIDAndBranch(left, right);
   } else {
     ASSERT(r.IsDouble());