Update in response to feedback from Chris:

- Use enums instead of magic numbers.

- Rework algorithm to use the bytes size from the target to determine when to
  emit stack protectors.

- Get rid of "propolice" in any comments.

- Renamed an option to its expanded form.

- Other miscellanenous changes.

More changes will come after this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58723 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/Passes.h

@@ -23,8 +23,19 @@ namespace llvm {
   class FunctionPass;
   class PassInfo;
   class TargetMachine;
+  class TargetLowering;
   class RegisterCoalescer;
 
+  /// StackProtectorLevel - An enumeration for when to determin when to turn
+  /// stack smashing protection (SSP) on.
+  namespace SSP {
+    enum StackProtectorLevel {
+      OFF,          // Stack protectors are off.
+      SOME,         // Stack protectors on only for functions that require them.
+      ALL           // Stack protectors on for all functions.
+    };
+  } // end SSP namespace
+
   /// createUnreachableBlockEliminationPass - The LLVM code generator does not
   /// work well with unreachable basic blocks (what live ranges make sense for a
   /// block that cannot be reached?).  As such, a code generator should either
@@ -193,7 +204,8 @@ namespace llvm {
   FunctionPass *createStackSlotColoringPass();
 
   /// createStackProtectorPass - This pass adds stack protectors to functions.
-  FunctionPass *createStackProtectorPass(int Level);
+  FunctionPass *createStackProtectorPass(SSP::StackProtectorLevel lvl,
+                                         const TargetLowering *tli);
 
 } // End llvm namespace