Adding ThisFunction expression to top-level compiler.

Review URL: http://codereview.chromium.org/466056

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3430 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/fast-codegen-arm.cc

@@ -1696,6 +1696,11 @@ void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   // Convert current context to test context: End post-test code.
 }
 
+void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
+  __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  Move(expr->context(), r0);
+}
+
 
 #undef __
 

src/compiler.cc

@@ -596,7 +596,7 @@ CodeGenSelector::CodeGenTag CodeGenSelector::Select(FunctionLiteral* fun) {
       Slot* slot = scope->parameter(i)->slot();
       if (slot != NULL && slot->type() == Slot::CONTEXT) {
         if (FLAG_trace_bailout) {
-          PrintF("function has context-allocated parameters");
+          PrintF("Function has context-allocated parameters.\n");
         }
         return NORMAL;
       }
@@ -1123,7 +1123,7 @@ void CodeGenSelector::VisitCompareOperation(CompareOperation* expr) {
 
 
 void CodeGenSelector::VisitThisFunction(ThisFunction* expr) {
-  BAILOUT("ThisFunction");
+  // ThisFunction is supported.
 }
 
 #undef BAILOUT

src/fast-codegen.cc

@@ -554,11 +554,6 @@ void FastCodeGenerator::VisitThrow(Throw* expr) {
 }
 
 
-void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
-  UNREACHABLE();
-}
-
-
 #undef __
 
 

src/ia32/fast-codegen-ia32.cc

@@ -1678,6 +1678,11 @@ void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 }
 
 
+void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
+  __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
+  Move(expr->context(), eax);
+}
+
 #undef __
 
 

src/x64/fast-codegen-x64.cc

@@ -1678,6 +1678,12 @@ void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 }
 
 
+void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
+  __ movq(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+  Move(expr->context(), rax);
+}
+
+
 #undef __
 
 

test/mjsunit/compiler/thisfunction.js

+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --always_fast_compiler
+
+// Test reference to this-function.
+
+var g = (function f(x) {
+    if (x == 1) return 42; else return f(1);
+  })(0);
+assertEquals(42, g);