Enable -arm-long-calls for ARMv7/Thumb2 code generation.

Change-Id: I3d31fe94f5fb2ff6990343f5399f3c0352c89234

1 files changed, 8 insertions, 0 deletions

diff --git a/src/compiler_llvm/compiler_llvm.cc b/src/compiler_llvm/compiler_llvm.cc
index c94e7ea36d..b2a6d28315 100644
--- a/src/compiler_llvm/compiler_llvm.cc
+++ b/src/compiler_llvm/compiler_llvm.cc
@@ -27,6 +27,7 @@
 
 #include <llvm/LinkAllPasses.h>
 #include <llvm/LinkAllVMCore.h>
+#include <llvm/Support/CommandLine.h>
 #include <llvm/Support/ManagedStatic.h>
 #include <llvm/Support/TargetSelect.h>
 #include <llvm/Support/Threading.h>
@@ -35,6 +36,10 @@ namespace llvm {
   extern bool TimePassesIsEnabled;
 }
 
+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.
+
 
 namespace {
 
@@ -51,6 +56,9 @@ void InitializeLLVM() {
   llvm::InitializeAllAsmParsers();
   // TODO: Maybe we don't have to initialize "all" targets.
 
+  // Enable -arm-long-calls
+  EnableARMLongCalls = true;
+
   // Initialize LLVM optimization passes
   llvm::PassRegistry &registry = *llvm::PassRegistry::getPassRegistry();