1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/Thumb1RegisterInfo.cpp b/llvm/lib/Target/ARM/Thumb1RegisterInfo.cpp
index 800532440d9..33cefb6e79b 100644
--- a/llvm/lib/Target/ARM/Thumb1RegisterInfo.cpp
+++ b/llvm/lib/Target/ARM/Thumb1RegisterInfo.cpp
@@ -46,6 +46,14 @@ Thumb1RegisterInfo::Thumb1RegisterInfo(const ARMBaseInstrInfo &tii,
   : ARMBaseRegisterInfo(tii, sti) {
 }
 
+const TargetRegisterClass*
+Thumb1RegisterInfo::getLargestLegalSuperClass(const TargetRegisterClass *RC)
+                                                                         const {
+  if (RC == ARM::tGPRRegisterClass || RC->hasSuperClass(ARM::tGPRRegisterClass))
+    return ARM::tGPRRegisterClass;
+  return ARMBaseRegisterInfo::getLargestLegalSuperClass(RC);
+}
+
 const TargetRegisterClass *
 Thumb1RegisterInfo::getPointerRegClass(unsigned Kind) const {
   return ARM::tGPRRegisterClass;