Don't emit code for instructions that are hiding behind an HSoftDeoptimize

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index fd9cc947284bf31823cff9f998e3bf5c3642785f..bf6533dd9111f4b4cc771c10a52b5e7e7b27f290 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -722,6 +722,11 @@ LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
+  return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
+}
+
+
 LInstruction* LChunkBuilder::DoSoftDeoptimize(HSoftDeoptimize* instr) {
   return AssignEnvironment(new(zone()) LDeoptimize);
 }