Changes from Nick Lewycky with a simplified PPCTargetAsmInfo.

[oota-llvm.git] / include / llvm / Target / TargetLowering.h

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index cea70d115391de09f56283ac8345ce501505727f..f3f4eda3b6a73446b9d1bc569634b2b7ad8eb661 100644 (file)
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -168,13 +168,34 @@ public:
 
   /// getTypeToTransformTo - For types supported by the target, this is an
   /// identity function.  For types that must be promoted to larger types, this
-  /// returns the larger type to promote to.  For types that are larger than the
-  /// largest integer register, this contains one step in the expansion to get
-  /// to the smaller register.
+  /// returns the larger type to promote to.  For integer types that are larger
+  /// than the largest integer register, this contains one step in the expansion
+  /// to get to the smaller register. For illegal floating point types, this
+  /// returns the integer type to transform to.
   MVT::ValueType getTypeToTransformTo(MVT::ValueType VT) const {
     return TransformToType[VT];
   }
   
+  /// getTypeToExpandTo - For types supported by the target, this is an
+  /// identity function.  For types that must be expanded (i.e. integer types
+  /// that are larger than the largest integer register or illegal floating
+  /// point types), this returns the largest legal type it will be expanded to.
+  MVT::ValueType getTypeToExpandTo(MVT::ValueType VT) const {
+    while (true) {
+      switch (getTypeAction(VT)) {
+      case Legal:
+        return VT;
+      case Expand:
+        VT = TransformToType[VT];
+        break;
+      default:
+        assert(false && "Type is not legal nor is it to be expanded!");
+        return VT;
+      }
+    }
+    return VT;
+  }
+
   /// getPackedTypeBreakdown - Packed types are broken down into some number of
   /// legal first class types.  For example, <8 x float> maps to 2 MVT::v4f32
   /// with Altivec or SSE1, or 8 promoted MVT::f64 values with the X86 FP stack.
@@ -338,9 +359,9 @@ public:
   }
 
   /// getNumElements - Return the number of registers that this ValueType will
-  /// eventually require.  This is always one for all non-integer types, is
-  /// one for any types promoted to live in larger registers, but may be more
-  /// than one for types (like i64) that are split into pieces.
+  /// eventually require.  This is one for any types promoted to live in larger
+  /// registers, but may be more than one for types (like i64) that are split
+  /// into pieces.
   unsigned getNumElements(MVT::ValueType VT) const {
     return NumElementsForVT[VT];
   }