Change all self assignments X=X to (void)X, so that we can turn on a
new gcc warning that complains on self-assignments and
self-initializations.
llvm-svn: 122458
diff --git a/llvm/lib/CodeGen/ScheduleDAGEmit.cpp b/llvm/lib/CodeGen/ScheduleDAGEmit.cpp
index 0a2fb37..6b7a8c6 100644
--- a/llvm/lib/CodeGen/ScheduleDAGEmit.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGEmit.cpp
@@ -57,7 +57,7 @@
assert(I->getReg() && "Unknown physical register!");
unsigned VRBase = MRI.createVirtualRegister(SU->CopyDstRC);
bool isNew = VRBaseMap.insert(std::make_pair(SU, VRBase)).second;
- isNew = isNew; // Silence compiler warning.
+ (void)isNew; // Silence compiler warning.
assert(isNew && "Node emitted out of order - early");
BuildMI(*BB, InsertPos, DebugLoc(), TII->get(TargetOpcode::COPY), VRBase)
.addReg(I->getReg());