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Tighten up the abstraction slightly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52045 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2008-06-06 12:49:32 +00:00
parent 83ec4b6711
commit 3b3adbb745
2 changed files with 19 additions and 12 deletions
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11
include/llvm/CodeGen/ValueTypes.h
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@@ -25,6 +25,7 @@ namespace llvm {
class Type;
struct MVT { // MVT = Machine Value Type
public:
enum SimpleValueType {
// If you change this numbering, you must change the values in
@@ -107,6 +108,8 @@ namespace llvm {
/// | | Vector element |
///
private:
static const int SimpleTypeBits = 8;
static const int PrecisionBits = 8;
static const int VectorBits = 32 - SimpleTypeBits - PrecisionBits;
@@ -125,6 +128,8 @@ namespace llvm {
uint32_t V;
public:
MVT() {}
MVT(SimpleValueType S) { V = S; }
inline bool operator== (const MVT VT) const { return V == VT.V; }
@@ -194,9 +199,8 @@ namespace llvm {
if (NumElements == 2) return v2f64;
break;
}
// Set the length with the top bit forced to zero (needed by the verifier).
MVT Result;
Result.V = VT.V | (((NumElements + 1) << (33 - VectorBits)) >> 1);
Result.V = VT.V | ((NumElements + 1) << (32 - VectorBits));
assert(Result.getVectorElementType() == VT &&
"Bad vector element type!");
assert(Result.getVectorNumElements() == NumElements &&
@@ -406,6 +410,9 @@ namespace llvm {
/// This returns all pointers as iPTR. If HandleUnknown is true, unknown
/// types are returned as Other, otherwise they are invalid.
static MVT getMVT(const Type *Ty, bool HandleUnknown = false);
/// getRawBits - Represent the type as a bunch of bits.
uint32_t getRawBits() const { return V; }
};
} // End llvm namespace