Subzero: Update tests and build scripts for sandboxing.

src/IceCfgNode.cpp

Index: src/IceCfgNode.cpp
diff --git a/src/IceCfgNode.cpp b/src/IceCfgNode.cpp
index c7a3d8164dbac270c6aab547970f4a6277afb81f..02b9aacb75f564ee48c0fe655c7c9ad7b0493e45 100644
--- a/src/IceCfgNode.cpp
+++ b/src/IceCfgNode.cpp
@@ -901,8 +901,9 @@ class BundleEmitHelper {
   BundleEmitHelper &operator=(const BundleEmitHelper &) = delete;
 
 public:
-  BundleEmitHelper(Assembler *Asm, const InstList &Insts)
-      : Asm(Asm), End(Insts.end()), BundleLockStart(End),
+  BundleEmitHelper(Assembler *Asm, TargetLowering *Target,
+                   const InstList &Insts)
+      : Asm(Asm), Target(Target), End(Insts.end()), BundleLockStart(End),
         BundleSize(1 << Asm->getBundleAlignLog2Bytes()),
         BundleMaskLo(BundleSize - 1), BundleMaskHi(~BundleMaskLo),
         SizeSnapshotPre(0), SizeSnapshotPost(0) {}
@@ -948,6 +949,7 @@ public:
     BundleLockStart = I;
     SizeSnapshotPre = Asm->getBufferSize();
     Asm->setPreliminary(true);
+    Target->snapshotEmitState();
     assert(isInBundleLockRegion());
   }
   // Update bookkeeping when the bundle_unlock instruction is
@@ -989,10 +991,12 @@ public:
     assert(isInBundleLockRegion());
     Asm->setBufferSize(SizeSnapshotPre);
     Asm->setPreliminary(false);
+    Target->rollbackEmitState();
   }
 
 private:
   Assembler *const Asm;
+  TargetLowering *const Target;
   // End is a sentinel value such that BundleLockStart==End implies
   // that we are not in a bundle_lock region.
   const InstList::const_iterator End;
@@ -1047,7 +1051,7 @@ void CfgNode::emitIAS(Cfg *Func) const {
   // of label bindings, label links, and relocation fixups.  Instead,
   // the first pass just disables all mutation of that state.
 
-  BundleEmitHelper Helper(Asm, Insts);
+  BundleEmitHelper Helper(Asm, Func->getTarget(), Insts);
   InstList::const_iterator End = Insts.end();
   // Retrying indicates that we had to roll back to the bundle_lock
   // instruction to apply padding before the bundle_lock sequence.