1 files changed, 5 insertions, 0 deletions
diff --git a/src/compiler_llvm/compiler_llvm.cc b/src/compiler_llvm/compiler_llvm.cc
index f9af139d52..baa6b2feeb 100644
--- a/src/compiler_llvm/compiler_llvm.cc
+++ b/src/compiler_llvm/compiler_llvm.cc
@@ -42,6 +42,8 @@ namespace llvm {
   extern bool TimePassesIsEnabled;
 }
 
+extern llvm::cl::opt<bool> ReserveR9;
+// ReserveR9 is defined in llvm/lib/Target/ARM/ARMSubtarget.cpp
 extern llvm::cl::opt<bool> EnableARMLongCalls;
 // NOTE: Although EnableARMLongCalls is defined in llvm/lib/Target/ARM/
 // ARMISelLowering.cpp, however, it is not in the llvm namespace.
@@ -55,6 +57,9 @@ void InitializeLLVM() {
   // NOTE: Uncomment following line to show the time consumption of LLVM passes
   //llvm::TimePassesIsEnabled = true;
 
+  // Enable -arm-reserve-r9
+  ReserveR9 = true;
+
   // Initialize LLVM target, MC subsystem, asm printer, and asm parser
   llvm::InitializeAllTargets();
   llvm::InitializeAllTargetMCs();