Subzero. RAII NaCl Bundling.

src/IceTargetLowering.cpp

Index: src/IceTargetLowering.cpp
diff --git a/src/IceTargetLowering.cpp b/src/IceTargetLowering.cpp
index 04f77e61b2caf26ea4fe4bedffc1efae35434fcd..2873272a63cdaf206884e8120698caef4187d5ec 100644
--- a/src/IceTargetLowering.cpp
+++ b/src/IceTargetLowering.cpp
@@ -152,6 +152,25 @@ void TargetLowering::staticInit(const ClFlags &Flags) {
 TargetLowering::TargetLowering(Cfg *Func)
     : Func(Func), Ctx(Func->getContext()), Context() {}
 
+TargetLowering::AutoBundle::AutoBundle(TargetLowering *Target,
+                                       InstBundleLock::Option Option)
+    : Target(Target),
+      NeedSandboxing(Target->Ctx->getFlags().getUseSandboxing()) {
+  assert(!Target->AutoBundling);
+  Target->AutoBundling = true;
+  if (NeedSandboxing) {
+    Target->_bundle_lock(Option);
+  }
+}
+
+TargetLowering::AutoBundle::~AutoBundle() {
+  assert(Target->AutoBundling);
+  Target->AutoBundling = false;
+  if (NeedSandboxing) {
+    Target->_bundle_unlock();
+  }
+}
+
 void TargetLowering::genTargetHelperCalls() {
   for (CfgNode *Node : Func->getNodes()) {
     Context.init(Node);