Fix issue 1076 by resetting labels of switch-clauses before use.

If we compile a function literal twice with the full code generator,
we must make sure that the labels embedded in the AST are reset.

BUG=1076

Review URL: http://codereview.chromium.org/6339014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6496 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/full-codegen-arm.cc

@@ -734,6 +734,8 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   // Compile all the tests with branches to their bodies.
   for (int i = 0; i < clauses->length(); i++) {
     CaseClause* clause = clauses->at(i);
+    clause->body_target()->entry_label()->Unuse();
+
     // The default is not a test, but remember it as final fall through.
     if (clause->is_default()) {
       default_clause = clause;

src/ia32/full-codegen-ia32.cc

@@ -764,6 +764,8 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   // Compile all the tests with branches to their bodies.
   for (int i = 0; i < clauses->length(); i++) {
     CaseClause* clause = clauses->at(i);
+    clause->body_target()->entry_label()->Unuse();
+
     // The default is not a test, but remember it as final fall through.
     if (clause->is_default()) {
       default_clause = clause;

src/x64/full-codegen-x64.cc

@@ -710,6 +710,8 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   // Compile all the tests with branches to their bodies.
   for (int i = 0; i < clauses->length(); i++) {
     CaseClause* clause = clauses->at(i);
+    clause->body_target()->entry_label()->Unuse();
+
     // The default is not a test, but remember it as final fall through.
     if (clause->is_default()) {
       default_clause = clause;