IA32: Refactor to avoid duplicate code.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
===================================================================
--- src/ia32/code-stubs-ia32.cc	(revision 6280)
+++ src/ia32/code-stubs-ia32.cc	(working copy)
@@ -1773,40 +1773,12 @@
 
 
 void TypeRecordingBinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
-  Label call_runtime;
   ASSERT(operands_type_ == TRBinaryOpIC::STRING);
   ASSERT(op_ == Token::ADD);
-  // If one of the arguments is a string, call the string add stub.
-  // Otherwise, transition to the generic TRBinaryOpIC type.
 
-  // Registers containing left and right operands respectively.
-  Register left = edx;
-  Register right = eax;
-
-  // Test if left operand is a string.
-  NearLabel left_not_string;
-  __ test(left, Immediate(kSmiTagMask));
-  __ j(zero, &left_not_string);
-  __ CmpObjectType(left, FIRST_NONSTRING_TYPE, ecx);
-  __ j(above_equal, &left_not_string);
-
-  StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB);
-  GenerateRegisterArgsPush(masm);
-  __ TailCallStub(&string_add_left_stub);
-
-  // Left operand is not a string, test right.
-  __ bind(&left_not_string);
-  __ test(right, Immediate(kSmiTagMask));
-  __ j(zero, &call_runtime);
-  __ CmpObjectType(right, FIRST_NONSTRING_TYPE, ecx);
-  __ j(above_equal, &call_runtime);
-
-  StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB);
-  GenerateRegisterArgsPush(masm);
-  __ TailCallStub(&string_add_right_stub);
-
-  // Neither argument is a string.
-  __ bind(&call_runtime);
+  // Try to add arguments as strings, otherwise, transition to the generic
+  // TRBinaryOpIC type.
+  GenerateAddStrings(masm);
   GenerateTypeTransition(masm);
 }
 
@@ -1967,49 +1939,7 @@
   // If an allocation fails, or SHR or MOD hit a hard case,
   // use the runtime system to get the correct result.
   __ bind(&call_runtime);
-
-  switch (op_) {
-    case Token::ADD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    case Token::SUB:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
-    case Token::MUL:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
-    case Token::DIV:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
-    case Token::MOD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
-    case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
-    case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
-    case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
-    case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
-    case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
-    case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
-      break;
-    default:
-      UNREACHABLE();
-  }
+  GenerateCallRuntime(masm);
 }
 
 
@@ -2149,49 +2079,7 @@
   // If an allocation fails, or SHR or MOD hit a hard case,
   // use the runtime system to get the correct result.
   __ bind(&call_runtime);
-
-  switch (op_) {
-    case Token::ADD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    case Token::SUB:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
-    case Token::MUL:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
-    case Token::DIV:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
-    case Token::MOD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
-    case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
-    case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
-    case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
-    case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
-    case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
-    case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
-      break;
-    default:
-      UNREACHABLE();
-  }
+  GenerateCallRuntime(masm);
 }
 
 
@@ -2345,41 +2233,56 @@
   // If all else fails, use the runtime system to get the correct
   // result.
   __ bind(&call_runtime);
-  switch (op_) {
-    case Token::ADD: {
-      GenerateRegisterArgsPush(masm);
-      // Test for string arguments before calling runtime.
-      // Registers containing left and right operands respectively.
-      Register lhs, rhs;
-      lhs = edx;
-      rhs = eax;
 
-      // Test if left operand is a string.
-      NearLabel lhs_not_string;
-      __ test(lhs, Immediate(kSmiTagMask));
-      __ j(zero, &lhs_not_string);
-      __ CmpObjectType(lhs, FIRST_NONSTRING_TYPE, ecx);
-      __ j(above_equal, &lhs_not_string);
+  // Try to add strings before calling runtime.
+  if (op_ == Token::ADD) {
+    GenerateAddStrings(masm);
+  }
 
-      StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB);
-      __ TailCallStub(&string_add_left_stub);
+  // Generate the runtime call.
+  GenerateCallRuntime(masm);
+}
 
-      NearLabel call_add_runtime;
-      // Left operand is not a string, test right.
-      __ bind(&lhs_not_string);
-      __ test(rhs, Immediate(kSmiTagMask));
-      __ j(zero, &call_add_runtime);
-      __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx);
-      __ j(above_equal, &call_add_runtime);
 
-      StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB);
-      __ TailCallStub(&string_add_right_stub);
+void TypeRecordingBinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
+  // If one of the arguments is a string, call the string add stub.
+  // Registers containing left and right operands respectively.
+  NearLabel left_not_string, neither_string;
+  Register left = edx;
+  Register right = eax;
 
-      // Neither argument is a string.
-      __ bind(&call_add_runtime);
+  // Test if left operand is a string.
+  __ test(left, Immediate(kSmiTagMask));
+  __ j(zero, &left_not_string);
+  __ CmpObjectType(left, FIRST_NONSTRING_TYPE, ecx);
+  __ j(above_equal, &left_not_string);
+
+  StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB);
+  GenerateRegisterArgsPush(masm);
+  __ TailCallStub(&string_add_left_stub);
+
+  // Left operand is not a string, test right.
+  __ bind(&left_not_string);
+  __ test(right, Immediate(kSmiTagMask));
+  __ j(zero, &neither_string);
+  __ CmpObjectType(right, FIRST_NONSTRING_TYPE, ecx);
+  __ j(above_equal, &neither_string);
+
+  StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB);
+  GenerateRegisterArgsPush(masm);
+  __ TailCallStub(&string_add_right_stub);
+
+  // Neither argument is a string.
+  __ bind(&neither_string);
+}
+
+
+void TypeRecordingBinaryOpStub::GenerateCallRuntime(MacroAssembler* masm) {
+  switch (op_) {
+    case Token::ADD:
+      GenerateRegisterArgsPush(masm);
       __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
       break;
-    }
     case Token::SUB:
       GenerateRegisterArgsPush(masm);
       __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
@@ -2393,6 +2296,7 @@
       __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
       break;
     case Token::MOD:
+      GenerateRegisterArgsPush(masm);
       __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
       break;
     case Token::BIT_OR: