diff --git a/compiler/optimizing/boolean_simplifier.cc b/compiler/optimizing/boolean_simplifier.cc
index ab77505..be432c5 100644
--- a/compiler/optimizing/boolean_simplifier.cc
+++ b/compiler/optimizing/boolean_simplifier.cc
@@ -59,7 +59,8 @@
       return new (allocator) HGreaterThan(lhs, rhs);
     } else if (cond->IsGreaterThan()) {
       return new (allocator) HLessThanOrEqual(lhs, rhs);
-    } else if (cond->IsGreaterThanOrEqual()) {
+    } else {
+      DCHECK(cond->IsGreaterThanOrEqual());
       return new (allocator) HLessThan(lhs, rhs);
     }
   } else if (cond->IsIntConstant()) {
@@ -70,10 +71,11 @@
       DCHECK(int_const->IsOne());
       return graph->GetIntConstant(0);
     }
+  } else {
+    // General case when 'cond' is another instruction of type boolean.
+    // Negate with 'cond == 0'.
+    return new (allocator) HEqual(cond, graph->GetIntConstant(0));
   }
-
-  // TODO: b/19992954
-  return nullptr;
 }
 
 void HBooleanSimplifier::Run() {
@@ -105,10 +107,6 @@
     HInstruction* replacement;
     if (NegatesCondition(true_value, false_value)) {
       replacement = GetOppositeCondition(if_condition);
-      if (replacement == nullptr) {
-        // Something we could not handle.
-        continue;
-      }
       if (replacement->GetBlock() == nullptr) {
         block->InsertInstructionBefore(replacement, if_instruction);
       }
diff --git a/test/468-bool-simplifier-regression/expected.txt b/test/468-bool-simplifier-regression/expected.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/468-bool-simplifier-regression/expected.txt
diff --git a/test/468-bool-simplifier-regression/info.txt b/test/468-bool-simplifier-regression/info.txt
new file mode 100644
index 0000000..0a46584
--- /dev/null
+++ b/test/468-bool-simplifier-regression/info.txt
@@ -0,0 +1,2 @@
+Regression test for optimizing's boolean simplifier
+that used to trip when a boolean value was the input of an If.
diff --git a/test/468-bool-simplifier-regression/smali/TestCase.smali b/test/468-bool-simplifier-regression/smali/TestCase.smali
new file mode 100644
index 0000000..f36304d
--- /dev/null
+++ b/test/468-bool-simplifier-regression/smali/TestCase.smali
@@ -0,0 +1,32 @@
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+.class public LTestCase;
+
+.super Ljava/lang/Object;
+
+.field public static value:Z
+
+.method public static testCase()Z
+    .registers 2
+    sget-boolean v0, LTestCase;->value:Z
+    const/4 v1, 1
+    if-eq v0, v1, :label1
+    const/4 v1, 1
+    goto :label2
+    :label1
+    const/4 v1, 0
+    :label2
+    return v1
+.end method
diff --git a/test/468-bool-simplifier-regression/src/Main.java b/test/468-bool-simplifier-regression/src/Main.java
new file mode 100644
index 0000000..1dd27c9
--- /dev/null
+++ b/test/468-bool-simplifier-regression/src/Main.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.reflect.*;
+
+public class Main {
+  public static boolean runTest(boolean input) throws Exception {
+    Class<?> c = Class.forName("TestCase");
+    Method m = c.getMethod("testCase");
+    Field f = c.getField("value");
+    f.set(null, (Boolean) input);
+    return (Boolean) m.invoke(null);
+  }
+
+  public static void main(String[] args) throws Exception {
+    if (runTest(true) != false) {
+      throw new Error("Expected false, got true");
+    }
+
+    if (runTest(false) != true) {
+      throw new Error("Expected true, got false");
+    }
+  }
+}