Move the check for "calls setjmp" to SelectionDAGISel so that it can be used by

more than just the stack slot coloring algorithm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104722 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineFunction.h

@@ -114,9 +114,14 @@ class MachineFunction {
   ///
   unsigned FunctionNumber;
   
-  /// The alignment of the function.
+  /// Alignment - The alignment of the function.
   unsigned Alignment;
 
+  /// CallsSetJmp - True if the function calls setjmp or sigsetjmp. This is used
+  /// to limit optimizations which cannot reason about the control flow of
+  /// setjmp.
+  bool CallsSetJmp;
+
   MachineFunction(const MachineFunction &); // DO NOT IMPLEMENT
   void operator=(const MachineFunction&);   // DO NOT IMPLEMENT
 public:
@@ -181,6 +186,17 @@ public:
   void EnsureAlignment(unsigned A) {
     if (Alignment < A) Alignment = A;
   }
+
+  /// callsSetJmp - Returns true if the function calls setjmp or sigsetjmp.
+  bool callsSetJmp() const {
+    return CallsSetJmp;
+  }
+
+  /// setCallsSetJmp - Set a flag that indicates if there's a call to setjmp or
+  /// sigsetjmp.
+  void setCallsSetJmp(bool B) {
+    CallsSetJmp = B;
+  }
   
   /// getInfo - Keep track of various per-function pieces of information for
   /// backends that would like to do so.