Subzero: Basic unconditional branch for Mips.

src/IceTargetLoweringMIPS32.cpp

Index: src/IceTargetLoweringMIPS32.cpp
diff --git a/src/IceTargetLoweringMIPS32.cpp b/src/IceTargetLoweringMIPS32.cpp
index 4fcd3ce6917adbac467f0e12c69768dbab9fb449..9010cbe6191df8a7fae6017a639989a0ff49978b 100644
--- a/src/IceTargetLoweringMIPS32.cpp
+++ b/src/IceTargetLoweringMIPS32.cpp
@@ -804,6 +804,10 @@ void TargetMIPS32::lowerAssign(const InstAssign *Instr) {
 }
 
 void TargetMIPS32::lowerBr(const InstBr *Instr) {
+  if (Instr->isUnconditional()) {
+    _br(Instr->getTargetUnconditional());
+    return;
+  }
   UnimplementedLoweringError(this, Instr);
 }