implement the null function for the Mips32 subzero compiler

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index f872af0f35a059cf4854ed83f479e0c8af15e40f..152f9f757ae7e4b884dc7c2b0499ffd13114189d 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -76,6 +76,9 @@ public:
     (void)C;
     llvm::report_fatal_error("Not yet implemented");
   }
+  void _ret(Variable *LR, Variable *Src0 = nullptr) {

[jvoung (off chromium), 2015/07/07 18:02:35]

RA

[jvoung (off chromium), 2015/07/08 00:39:11]

Could rename this too.

[reed.kotler, 2015/07/08 02:05:17]

Done.

+    Context.insert(InstMIPS32Ret::create(Func, LR, Src0));
+  }
 
   void lowerArguments() override;
   void addProlog(CfgNode *Node) override;