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-rw-r--r--include/llvm/CodeGen/ValueTypes.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/ValueTypes.h b/include/llvm/CodeGen/ValueTypes.h
index 8582323a52..211bc28123 100644
--- a/include/llvm/CodeGen/ValueTypes.h
+++ b/include/llvm/CodeGen/ValueTypes.h
@@ -82,6 +82,12 @@ namespace MVT { // MVT = Machine Value Types
/// Note that simple doesn't necessary mean legal for the target machine.
/// All legal value types must be simple, but often there are some simple
/// value types that are not legal.
+ ///
+ /// @internal
+ /// Currently extended types are always vector types. Extended types are
+ /// encoded by having the first SimpleTypeBits bits encode the vector
+ /// element type (which must be a scalar type) and the remaining upper
+ /// bits encode the vector length, offset by one.
typedef uint32_t ValueType;
static const int SimpleTypeBits = 8;