Add an extra operand to LABEL nodes which distinguishes between debug, EH, or misc...

[oota-llvm.git] / include / llvm / ParameterAttributes.h

diff --git a/include/llvm/ParameterAttributes.h b/include/llvm/ParameterAttributes.h
index caeb556a3f9127baf67b89fc9aeea6ba5ef1aab7..31f9eb4a0808f494009adc125e4499e2f4ff4c5c 100644 (file)
--- a/include/llvm/ParameterAttributes.h
+++ b/include/llvm/ParameterAttributes.h
@@ -19,8 +19,11 @@
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/FoldingSet.h"
+#include <cassert>
 
 namespace llvm {
+class Type;
+
 namespace ParamAttr {
 
 /// Function parameters and results can have attributes to indicate how they 
@@ -43,28 +46,14 @@ enum Attributes {
   ReadOnly   = 1 << 10  ///< Function only reads from memory
 };
 
-/// These attributes can safely be dropped from a function or a function call:
-/// doing so may reduce the number of optimizations performed, but it will not
-/// change a correct program into an incorrect one.
-/// @brief Attributes that do not change the calling convention.
-const uint16_t Informative = NoReturn | NoUnwind | NoAlias |
-                             ReadNone | ReadOnly;
-
 /// @brief Attributes that only apply to function parameters.
 const uint16_t ParameterOnly = ByVal | InReg | Nest | StructRet;
 
 /// @brief Attributes that only apply to function return values.
 const uint16_t ReturnOnly = NoReturn | NoUnwind | ReadNone | ReadOnly;
 
-/// @brief Attributes that only apply to integers.
-const uint16_t IntegerTypeOnly = SExt | ZExt;
-
-/// @brief Attributes that only apply to pointers.
-const uint16_t PointerTypeOnly = ByVal | Nest | NoAlias | StructRet;
-
-/// @brief Attributes that do not apply to void type function return values.
-const uint16_t VoidTypeIncompatible = IntegerTypeOnly | PointerTypeOnly |
-                                      ParameterOnly;
+/// @brief Parameter attributes that do not apply to vararg call arguments.
+const uint16_t VarArgsIncompatible = StructRet;
 
 /// @brief Attributes that are mutually incompatible.
 const uint16_t MutuallyIncompatible[3] = {
@@ -73,7 +62,10 @@ const uint16_t MutuallyIncompatible[3] = {
   ReadNone | ReadOnly
 };
 
-}
+/// @brief Which attributes cannot be applied to a type.
+uint16_t typeIncompatible (const Type *Ty);
+
+} // end namespace ParamAttr
 
 /// This is just a pair of values to associate a set of parameter attributes
 /// with a parameter index. 
@@ -122,14 +114,12 @@ class ParamAttrsList : public FoldingSetNode {
     // ParamAttrsList is uniqued, these should not be publicly available
     void operator=(const ParamAttrsList &); // Do not implement
     ParamAttrsList(const ParamAttrsList &); // Do not implement
-    ParamAttrsList();                       // Do not implement
     ~ParamAttrsList();                      // Private implementation
 
     /// Only the \p get method can invoke this when it wants to create a
     /// new instance.
     /// @brief Construct an ParamAttrsList from a ParamAttrsVector
-    explicit ParamAttrsList(const ParamAttrsVector &attrVec) 
-      : attrs(attrVec), refCount(0) {}
+    explicit ParamAttrsList(const ParamAttrsVector &attrVec);
 
   public:
     /// This method ensures the uniqueness of ParamAttrsList instances.  The
@@ -159,11 +149,6 @@ class ParamAttrsList : public FoldingSetNode {
     static const ParamAttrsList *excludeAttrs(const ParamAttrsList *PAL,
                                               uint16_t idx, uint16_t attrs);
 
-    /// Returns whether each of the specified lists of attributes can be safely
-    /// replaced with the other in a function or a function call.
-    /// @brief Whether one attribute list can safely replace the other.
-    static bool areCompatible(const ParamAttrsList *A, const ParamAttrsList *B);
-
   /// @}
   /// @name Accessors
   /// @{
@@ -186,6 +171,12 @@ class ParamAttrsList : public FoldingSetNode {
       return getParamAttrs(i) & attr;
     }
 
+    /// This returns whether the given attribute is set for at least one
+    /// parameter or for the return value.
+    /// @returns true if the parameter attribute is set somewhere
+    /// @brief Determine if a ParameterAttributes is set somewhere
+    bool hasAttrSomewhere(ParameterAttributes attr) const;
+
     /// The set of ParameterAttributes set in Attributes is converted to a
     /// string of equivalent mnemonics. This is, presumably, for writing out
     /// the mnemonics for the assembly writer. 
@@ -268,7 +259,10 @@ class ParamAttrsList : public FoldingSetNode {
   /// @name Implementation Details
   /// @{
   public:
-    void Profile(FoldingSetNodeID &ID) const;
+    void Profile(FoldingSetNodeID &ID) const {
+      Profile(ID, attrs);
+    }
+    static void Profile(FoldingSetNodeID &ID, const ParamAttrsVector &Attrs);
     void dump() const;
 
   /// @}