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Use a negative value to represent INVALID_SIMPLE_VALUE_TYPE instead of 256. Its much cheaper for the isSimple() checks to look for values less than 0 rather than a value greater than 255. This shaves ~8k off the size of the llc binary on x86-64. 

llvm-svn: 170981
This commit is contained in:
Craig Topper 2012-12-22 08:16:17 +00:00
parent 9fd1571e7a
commit c9dcbe6987
1 changed files with 9 additions and 12 deletions
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21
llvm/include/llvm/CodeGen/ValueTypes.h
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@ -33,6 +33,10 @@ namespace llvm {
class MVT {
public:
enum SimpleValueType {
// INVALID_SIMPLE_VALUE_TYPE - Simple value types less than zero are
// considered extended value types.
INVALID_SIMPLE_VALUE_TYPE = -1
// If you change this numbering, you must change the values in
// ValueTypes.td as well!
Other = 0, // This is a non-standard value
@ -138,13 +142,6 @@ namespace llvm {
// iPTR - An int value the size of the pointer of the current
// target. This should only be used internal to tblgen!
iPTR = 255,
// LastSimpleValueType - The greatest valid SimpleValueType value.
LastSimpleValueType = 255,
// INVALID_SIMPLE_VALUE_TYPE - Simple value types greater than or equal
// to this are considered extended value types.
INVALID_SIMPLE_VALUE_TYPE = LastSimpleValueType + 1
};
SimpleValueType SimpleTy;
@ -531,7 +528,7 @@ namespace llvm {
bool operator!=(EVT VT) const {
if (V.SimpleTy != VT.V.SimpleTy)
return true;
if (V.SimpleTy == MVT::INVALID_SIMPLE_VALUE_TYPE)
if (V.SimpleTy < 0)
return LLVMTy != VT.LLVMTy;
return false;
}
@ -547,7 +544,7 @@ namespace llvm {
/// number of bits.
static EVT getIntegerVT(LLVMContext &Context, unsigned BitWidth) {
MVT M = MVT::getIntegerVT(BitWidth);
if (M.SimpleTy != MVT::INVALID_SIMPLE_VALUE_TYPE)
if (M.SimpleTy >= 0)
return M;
return getExtendedIntegerVT(Context, BitWidth);
}
@ -556,7 +553,7 @@ namespace llvm {
/// length, where each element is of type VT.
static EVT getVectorVT(LLVMContext &Context, EVT VT, unsigned NumElements) {
MVT M = MVT::getVectorVT(VT.V, NumElements);
if (M.SimpleTy != MVT::INVALID_SIMPLE_VALUE_TYPE)
if (M.SimpleTy >= 0)
return M;
return getExtendedVectorVT(Context, VT, NumElements);
}
@ -571,7 +568,7 @@ namespace llvm {
unsigned BitWidth = EltTy.getSizeInBits();
MVT IntTy = MVT::getIntegerVT(BitWidth);
MVT VecTy = MVT::getVectorVT(IntTy, getVectorNumElements());
assert(VecTy != MVT::INVALID_SIMPLE_VALUE_TYPE &&
assert(VecTy.SimpleTy >= 0 &&
"Simple vector VT not representable by simple integer vector VT!");
return VecTy;
}
@ -579,7 +576,7 @@ namespace llvm {
/// isSimple - Test if the given EVT is simple (as opposed to being
/// extended).
bool isSimple() const {
return V.SimpleTy <= MVT::LastSimpleValueType;
return V.SimpleTy >= 0;
}
/// isExtended - Test if the given EVT is extended (as opposed to