Info propagation.

test/cctest/test-regexp.cc

Index: test/cctest/test-regexp.cc
diff --git a/test/cctest/test-regexp.cc b/test/cctest/test-regexp.cc
index 853d4f47108d5be1a49161cefb04d409812c3293..4b41309c18617a113060119a7a112aef822d13d6 100644
--- a/test/cctest/test-regexp.cc
+++ b/test/cctest/test-regexp.cc
@@ -334,17 +334,23 @@ TEST(CharacterClassEscapes) {
 }
 
 
-static void Execute(const char* input,
-                    const char* str,
-                    bool dot_output = false) {
-  v8::HandleScope scope;
+static RegExpNode* Compile(const char* input) {
   unibrow::Utf8InputBuffer<> buffer(input, strlen(input));
-  ZoneScope zone_scope(DELETE_ON_EXIT);
   RegExpParseResult result;
   if (!v8::internal::ParseRegExp(&buffer, &result))
-    return;
+    return NULL;
   RegExpNode* node = NULL;
   RegExpEngine::Compile(&result, &node, false);
+  return node;
+}
+
+
+static void Execute(const char* input,
+                    const char* str,
+                    bool dot_output = false) {
+  v8::HandleScope scope;
+  ZoneScope zone_scope(DELETE_ON_EXIT);
+  RegExpNode* node = Compile(input);
   USE(node);
 #ifdef DEBUG
   if (dot_output) {
@@ -755,6 +761,14 @@ TEST(LatinCanonicalize) {
 }
 
 
+TEST(SimplePropagation) {
+  v8::HandleScope scope;
+  ZoneScope zone_scope(DELETE_ON_EXIT);
+  RegExpNode* node = Compile("(a|^b|c)");
+  CHECK(node->info()->determine_start);
+}
+
+
 TEST(Graph) {
-  Execute("fo[ob]ar|[ba]z|x[yz]*", "", true);
+  Execute("(a|^b|c)", "", true);
 }