1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/TargetRegisterInfo.cpp b/llvm/lib/CodeGen/TargetRegisterInfo.cpp
index a41d599..e6baf00 100644
--- a/llvm/lib/CodeGen/TargetRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/TargetRegisterInfo.cpp
@@ -281,7 +281,7 @@ const TargetRegisterClass *firstCommonClass(const uint32_t *A,
                                             const TargetRegisterInfo *TRI) {
   for (unsigned I = 0, E = TRI->getNumRegClasses(); I < E; I += 32)
     if (unsigned Common = *A++ & *B++)
-      return TRI->getRegClass(I + countTrailingZeros(Common));
+      return TRI->getRegClass(I + llvm::countr_zero(Common));
   return nullptr;
 }