Revision: 6679
Author: [email protected]
Date: Tue Feb 8 06:00:22 2011
Log: Fix a possible duplicate AST ID for deoptimization.
For redeclarations of variables that alias the parameters in functions
using arguments, we need to avoid re-visiting the shared variable
rewrite.
BUG=v8:1104
Review URL: http://codereview.chromium.org/6453004
http://code.google.com/p/v8/source/detail?r=6679
Added:
/branches/bleeding_edge/test/mjsunit/regress/regress-1104.js
Modified:
/branches/bleeding_edge/src/ia32/full-codegen-ia32.cc
=======================================
--- /dev/null
+++ /branches/bleeding_edge/test/mjsunit/regress/regress-1104.js Tue Feb 8
06:00:22 2011
@@ -0,0 +1,37 @@
+// Copyright 2011 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.
+
+// A redeclaration of a variable that aliases a parameter and so rewrites
to
+// an arguments object access should not record duplicate AST IDs for
+// bailout.
+function test(f) {
+ function f() {}
+ function f() {}
+ return arguments;
+}
+
+test();
=======================================
--- /branches/bleeding_edge/src/ia32/full-codegen-ia32.cc Mon Feb 7
23:49:59 2011
+++ /branches/bleeding_edge/src/ia32/full-codegen-ia32.cc Tue Feb 8
06:00:22 2011
@@ -717,18 +717,25 @@
} else if (prop != NULL) {
if (function != NULL || mode == Variable::CONST) {
// We are declaring a function or constant that rewrites to a
- // property. Use (keyed) IC to set the initial value.
- VisitForStackValue(prop->obj());
+ // property. Use (keyed) IC to set the initial value. We cannot
+ // visit the rewrite because it's shared and we risk recording
+ // duplicate AST IDs for bailouts from optimized code.
+ ASSERT(prop->obj()->AsVariableProxy() != NULL);
+ { AccumulatorValueContext for_object(this);
+ EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+ }
+
if (function != NULL) {
- VisitForStackValue(prop->key());
+ __ push(eax);
VisitForAccumulatorValue(function);
- __ pop(ecx);
+ __ pop(edx);
} else {
- VisitForAccumulatorValue(prop->key());
- __ mov(ecx, result_register());
- __ mov(result_register(), Factory::the_hole_value());
- }
- __ pop(edx);
+ __ mov(edx, eax);
+ __ mov(eax, Factory::the_hole_value());
+ }
+ ASSERT(prop->key()->AsLiteral() != NULL &&
+ prop->key()->AsLiteral()->handle()->IsSmi());
+ __ Set(ecx, Immediate(prop->key()->AsLiteral()->handle()));
Handle<Code>
ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
EmitCallIC(ic, RelocInfo::CODE_TARGET);
--
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