propagate fast-math-flags on DAG nodes

[oota-llvm.git] / include / llvm / CodeGen / SelectionDAGNodes.h

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index eefa76d37d6fa0375a00c3d6e21c00dd7853b7f9..2a5c32bd0c6ef987b1a2d06df417ec82680e9e4d 100644 (file)
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -44,6 +44,7 @@ class GlobalValue;
 class MachineBasicBlock;
 class MachineConstantPoolValue;
 class SDNode;
+class BinaryWithFlagsSDNode;
 class Value;
 class MCSymbol;
 template <typename T> struct DenseMapInfo;
@@ -319,6 +320,61 @@ template<> struct simplify_type<SDUse> {
   }
 };
 
+/// These are IR-level optimization flags that may be propagated to SDNodes.
+/// TODO: This data structure should be shared by the IR optimizer and the
+/// the backend.
+struct SDNodeFlags {
+private:
+  bool NoUnsignedWrap : 1;
+  bool NoSignedWrap : 1;
+  bool Exact : 1;
+  bool UnsafeAlgebra : 1;
+  bool NoNaNs : 1;
+  bool NoInfs : 1;
+  bool NoSignedZeros : 1;
+  bool AllowReciprocal : 1;
+  
+public:
+  /// Default constructor turns off all optimization flags.
+  SDNodeFlags() {
+    NoUnsignedWrap = false;
+    NoSignedWrap = false;
+    Exact = false;
+    UnsafeAlgebra = false;
+    NoNaNs = false;
+    NoInfs = false;
+    NoSignedZeros = false;
+    AllowReciprocal = false;
+  }
+  
+  // These are mutators for each flag.
+  void setNoUnsignedWrap(bool b) { NoUnsignedWrap = b; }
+  void setNoSignedWrap(bool b) { NoSignedWrap = b; }
+  void setExact(bool b) { Exact = b; }
+  void setUnsafeAlgebra(bool b) { UnsafeAlgebra = b; }
+  void setNoNaNs(bool b) { NoNaNs = b; }
+  void setNoInfs(bool b) { NoInfs = b; }
+  void setNoSignedZeros(bool b) { NoSignedZeros = b; }
+  void setAllowReciprocal(bool b) { AllowReciprocal = b; }
+  
+  // These are accessors for each flag.
+  bool hasNoUnsignedWrap() const { return NoUnsignedWrap; }
+  bool hasNoSignedWrap() const { return NoSignedWrap; }
+  bool hasExact() const { return Exact; }
+  bool hasUnsafeAlgebra() const { return UnsafeAlgebra; }
+  bool hasNoNaNs() const { return NoNaNs; }
+  bool hasNoInfs() const { return NoInfs; }
+  bool hasNoSignedZeros() const { return NoSignedZeros; }
+  bool hasAllowReciprocal() const { return AllowReciprocal; }
+  
+  /// Return a raw encoding of the flags.
+  /// This function should only be used to add data to the NodeID value.
+  unsigned getRawFlags() const {
+    return (NoUnsignedWrap << 0) | (NoSignedWrap << 1) | (Exact << 2) |
+    (UnsafeAlgebra << 3) | (NoNaNs << 4) | (NoInfs << 5) |
+    (NoSignedZeros << 6) | (AllowReciprocal << 7);
+  }
+};
 
 /// Represents one node in the SelectionDAG.
 ///
@@ -639,6 +695,10 @@ public:
     return nullptr;
   }
 
+  /// This could be defined as a virtual function and implemented more simply
+  /// and directly, but it is not to avoid creating a vtable for this class.
+  const SDNodeFlags *getFlags() const;
+  
   /// Return the number of values defined/returned by this operator.
   unsigned getNumValues() const { return NumValues; }
 
@@ -950,62 +1010,6 @@ inline void SDUse::setNode(SDNode *N) {
   if (N) N->addUse(*this);
 }
 
-/// These are IR-level optimization flags that may be propagated to SDNodes.
-/// TODO: This data structure should be shared by the IR optimizer and the
-/// the backend.
-struct SDNodeFlags {
-private:
-  bool NoUnsignedWrap : 1;
-  bool NoSignedWrap : 1;
-  bool Exact : 1;
-  bool UnsafeAlgebra : 1;
-  bool NoNaNs : 1;
-  bool NoInfs : 1;
-  bool NoSignedZeros : 1;
-  bool AllowReciprocal : 1;
-
-public:
-  /// Default constructor turns off all optimization flags.
-  SDNodeFlags() {
-    NoUnsignedWrap = false;
-    NoSignedWrap = false;
-    Exact = false;
-    UnsafeAlgebra = false;
-    NoNaNs = false;
-    NoInfs = false;
-    NoSignedZeros = false;
-    AllowReciprocal = false;
-  }
-
-  // These are mutators for each flag.
-  void setNoUnsignedWrap(bool b) { NoUnsignedWrap = b; }
-  void setNoSignedWrap(bool b) { NoSignedWrap = b; }
-  void setExact(bool b) { Exact = b; }
-  void setUnsafeAlgebra(bool b) { UnsafeAlgebra = b; }
-  void setNoNaNs(bool b) { NoNaNs = b; }
-  void setNoInfs(bool b) { NoInfs = b; }
-  void setNoSignedZeros(bool b) { NoSignedZeros = b; }
-  void setAllowReciprocal(bool b) { AllowReciprocal = b; }
-
-  // These are accessors for each flag.
-  bool hasNoUnsignedWrap() const { return NoUnsignedWrap; }
-  bool hasNoSignedWrap() const { return NoSignedWrap; }
-  bool hasExact() const { return Exact; }
-  bool hasUnsafeAlgebra() const { return UnsafeAlgebra; }
-  bool hasNoNaNs() const { return NoNaNs; }
-  bool hasNoInfs() const { return NoInfs; }
-  bool hasNoSignedZeros() const { return NoSignedZeros; }
-  bool hasAllowReciprocal() const { return AllowReciprocal; }
-
-  /// Return a raw encoding of the flags.
-  /// This function should only be used to add data to the NodeID value.
-  unsigned getRawFlags() const {
-    return (NoUnsignedWrap << 0) | (NoSignedWrap << 1) | (Exact << 2) |
-           (UnsafeAlgebra << 3) | (NoNaNs << 4) | (NoInfs << 5) |
-           (NoSignedZeros << 6) | (AllowReciprocal << 7);
-  }
-};
-
 /// This class is used for single-operand SDNodes.  This is solely
 /// to allow co-allocation of node operands with the node itself.
 class UnarySDNode : public SDNode {