Replace the -unwind-tables option with a per function flag. This is more
LTO friendly as we can now correctly merge files compiled with or without
-fasynchronous-unwind-tables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132033 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86FrameLowering.cpp b/lib/Target/X86/X86FrameLowering.cpp
index 06d12fc..2e95300 100644
--- a/lib/Target/X86/X86FrameLowering.cpp
+++ b/lib/Target/X86/X86FrameLowering.cpp
@@ -355,7 +355,7 @@
   MachineModuleInfo &MMI = MF.getMMI();
   X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
   bool needsFrameMoves = MMI.hasDebugInfo() ||
-                          !Fn->doesNotThrow() || UnwindTablesMandatory;
+    Fn->needsUnwindTableEntry();
   uint64_t MaxAlign  = MFI->getMaxAlignment(); // Desired stack alignment.
   uint64_t StackSize = MFI->getStackSize();    // Number of bytes to allocate.
   bool HasFP = hasFP(MF);