[WebAssembly] Make WebAssemblyStoreResults only return true when it has a change.
llvm-svn: 255253
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp
index 21122ba..650143a 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp
@@ -71,6 +71,7 @@
const MachineRegisterInfo &MRI = MF.getRegInfo();
MachineDominatorTree &MDT = getAnalysis<MachineDominatorTree>();
+ bool Changed = false;
assert(MRI.isSSA() && "StoreResults depends on SSA form");
@@ -108,6 +109,7 @@
if (&MI == Where || !MDT.dominates(&MI, Where))
continue;
}
+ Changed = true;
DEBUG(dbgs() << "Setting operand " << O << " in " << *Where
<< " from " << MI << "\n");
O.setReg(ToReg);
@@ -115,5 +117,5 @@
}
}
- return true;
+ return Changed;
}