Shorten bail out checks when calling code which can fail.

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
diff --git a/src/arm/stub-cache-arm.cc b/src/arm/stub-cache-arm.cc
index 5678676fb0ceb94ffc12eba9ab3c297032753ee3..1ee7419715b1155d61dad19343820f49db1b85a4 100644
--- a/src/arm/stub-cache-arm.cc
+++ b/src/arm/stub-cache-arm.cc
@@ -1526,10 +1526,8 @@ MaybeObject* CallStubCompiler::CompileCallField(JSObject* object,
 
   // Handle call cache miss.
   __ bind(&miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(FIELD, name);
@@ -1686,10 +1684,8 @@ MaybeObject* CallStubCompiler::CompileArrayPushCall(Object* object,
 
   // Handle call cache miss.
   __ bind(&miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -1772,10 +1768,8 @@ MaybeObject* CallStubCompiler::CompileArrayPopCall(Object* object,
 
   // Handle call cache miss.
   __ bind(&miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -1858,10 +1852,8 @@ MaybeObject* CallStubCompiler::CompileStringCharCodeAtCall(
   // Restore function name in r2.
   __ Move(r2, Handle<String>(name));
   __ bind(&name_miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -1946,10 +1938,8 @@ MaybeObject* CallStubCompiler::CompileStringCharAtCall(
   // Restore function name in r2.
   __ Move(r2, Handle<String>(name));
   __ bind(&name_miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -2022,10 +2012,8 @@ MaybeObject* CallStubCompiler::CompileStringFromCharCodeCall(
 
   __ bind(&miss);
   // r2: function name.
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return (cell == NULL) ? GetCode(function) : GetCode(NORMAL, name);
@@ -2171,8 +2159,8 @@ MaybeObject* CallStubCompiler::CompileMathFloorCall(Object* object,
 
   __ bind(&miss);
   // r2: function name.
-  MaybeObject* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return (cell == NULL) ? GetCode(function) : GetCode(NORMAL, name);
@@ -2273,10 +2261,8 @@ MaybeObject* CallStubCompiler::CompileMathAbsCall(Object* object,
 
   __ bind(&miss);
   // r2: function name.
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return (cell == NULL) ? GetCode(function) : GetCode(NORMAL, name);
@@ -2327,10 +2313,8 @@ MaybeObject* CallStubCompiler::CompileFastApiCall(
   FreeSpaceForFastApiCall(masm());
 
   __ bind(&miss_before_stack_reserved);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -2461,10 +2445,8 @@ MaybeObject* CallStubCompiler::CompileCallConstant(Object* object,
 
   // Handle call cache miss.
   __ bind(&miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(function);
@@ -2516,10 +2498,8 @@ MaybeObject* CallStubCompiler::CompileCallInterceptor(JSObject* object,
 
   // Handle call cache miss.
   __ bind(&miss);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(INTERCEPTOR, name);
@@ -2585,10 +2565,8 @@ MaybeObject* CallStubCompiler::CompileCallGlobal(JSObject* object,
   // Handle call cache miss.
   __ bind(&miss);
   __ IncrementCounter(COUNTERS->call_global_inline_miss(), 1, r1, r3);
-  Object* obj;
-  { MaybeObject* maybe_obj = GenerateMissBranch();
-    if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-  }
+  MaybeObject* maybe_result = GenerateMissBranch();
+  if (maybe_result->IsFailure()) return maybe_result;
 
   // Return the generated code.
   return GetCode(NORMAL, name);