commit 6d2f9cec715c50bca44816d9bdea97f8b63bf2a0
author Bob Wilson <bob.wilson@apple.com> Fri Oct 07 17:17:49 2011 +0000
committer Bob Wilson <bob.wilson@apple.com> Fri Oct 07 17:17:49 2011 +0000
tree ca892fc76f4fa7e32753e4f85628c58af79b57f8
parent 2fef4573df6fd645f4401302d21c16e72418e3a8

Reenable tail calls for iOS 5.0 and later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141370 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMSubtarget.cpp

diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
index 82e5422..247d6be 100644
--- a/lib/Target/ARM/ARMSubtarget.cpp
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -60,6 +60,7 @@
   , PostRAScheduler(false)
   , IsR9Reserved(ReserveR9)
   , UseMovt(false)
+  , SupportsTailCall(false)
   , HasFP16(false)
   , HasD16(false)
   , HasHardwareDivide(false)
@@ -113,6 +114,8 @@
   else {
     IsR9Reserved = ReserveR9 | !HasV6Ops;
     UseMovt = DarwinUseMOVT && hasV6T2Ops();
+    const Triple &T = getTargetTriple();
+    SupportsTailCall = T.getOS() == Triple::IOS && !T.isOSVersionLT(5, 0);
   }
 
   if (!isThumb() || hasThumb2())