Add missing branches in code generated for LModI with power-of-2 divisor.

BUG=v8:1476
TEST=test/mjsunit/regress/regress-1476.js

Review URL: http://codereview.chromium.org/7097015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8301 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-codegen-arm.cc

@@ -888,6 +888,8 @@ void LCodeGen::DoModI(LModI* instr) {
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ b(ne, &done);
       DeoptimizeIf(al, instr->environment());
+    } else {
+      __ b(&done);
     }
     __ bind(&positive_dividend);
     __ and_(dividend, dividend, Operand(divisor - 1));

src/ia32/lithium-codegen-ia32.cc

@@ -811,6 +811,8 @@ void LCodeGen::DoModI(LModI* instr) {
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ j(not_zero, &done, Label::kNear);
       DeoptimizeIf(no_condition, instr->environment());
+    } else {
+      __ jmp(&done, Label::kNear);
     }
     __ bind(&positive_dividend);
     __ and_(dividend, divisor - 1);

src/x64/lithium-codegen-x64.cc

@@ -809,6 +809,8 @@ void LCodeGen::DoModI(LModI* instr) {
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ j(not_zero, &done, Label::kNear);
       DeoptimizeIf(no_condition, instr->environment());
+    } else {
+      __ jmp(&done, Label::kNear);
     }
     __ bind(&positive_dividend);
     __ andl(dividend, Immediate(divisor - 1));

test/mjsunit/regress/regress-1476.js

+// 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.
+
+// Flags: --allow-natives-syntax
+
+function foo (i) { return (i % 2) | 0; }
+
+assertEquals (-1, foo(-1));
+assertEquals (-1, foo(-1));
+%OptimizeFunctionOnNextCall(foo);
+assertEquals (-1, foo(-1));