1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/Thumb2SizeReduction.cpp b/lib/Target/ARM/Thumb2SizeReduction.cpp
index 2ee908b..e967e53 100644
--- a/lib/Target/ARM/Thumb2SizeReduction.cpp
+++ b/lib/Target/ARM/Thumb2SizeReduction.cpp
@@ -21,6 +21,7 @@
 #include "llvm/IR/Function.h"        // To access Function attributes
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"
 using namespace llvm;
 
@@ -1002,6 +1003,9 @@ bool Thumb2SizeReduce::ReduceMBB(MachineBasicBlock &MBB) {
 
 bool Thumb2SizeReduce::runOnMachineFunction(MachineFunction &MF) {
   STI = &static_cast<const ARMSubtarget &>(MF.getSubtarget());
+  if (STI->isThumb1Only() || STI->prefers32BitThumb())
+    return false;
+
   TII = static_cast<const Thumb2InstrInfo *>(STI->getInstrInfo());
 
   // Optimizing / minimizing size?