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

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 8ce576da0a3a9c252b3b18c1846ab9a8b387166e..4d9603ed5d9be174b7e963494a724cb61c1e0b5d 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -682,6 +682,11 @@ 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);
 }