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PR4795: Remove EEVT::isFP, isInt and isVec types used by TableGen's type

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inferencing.  As far as I can tell, these are equivalent to the existing
MVT::fAny, iAny and vAny types, and having both of them makes it harder
to reason about and modify the type inferencing code.

The specific problem in PR4795 occurs when updating a vAny type to be fAny
or iAny, or vice versa.  Both iAny and fAny include vector types -- they
intersect with the set of types represented by vAny.  When merging them,
choose fAny/iAny to represent the intersection.  This is not perfect, since
fAny/iAny also include scalar types, but it is good enough for TableGen's
type inferencing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80423 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2009-08-29 05:53:25 +00:00
parent 6fefcebc4f
commit cdfa01bf0f
2 changed files with 46 additions and 35 deletions
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utils/TableGen/CodeGenDAGPatterns.h
+7 -7
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@@ -35,24 +35,24 @@ namespace llvm {
/// EEVT::DAGISelGenValueType - These are some extended forms of
/// MVT::SimpleValueType that we use as lattice values during type inference.
/// The existing MVT iAny, fAny and vAny types suffice to represent
/// arbitrary integer, floating-point, and vector types, so only an unknown
/// value is needed.
namespace EEVT {
enum DAGISelGenValueType {
isFP = MVT::LAST_VALUETYPE,
isInt,
isVec,
isUnknown
isUnknown = MVT::LAST_VALUETYPE
};
/// isExtIntegerInVTs - Return true if the specified extended value type
/// vector contains isInt or an integer value type.
/// vector contains iAny or an integer value type.
bool isExtIntegerInVTs(const std::vector<unsigned char> &EVTs);
/// isExtFloatingPointInVTs - Return true if the specified extended value
/// type vector contains isFP or a FP value type.
/// type vector contains fAny or a FP value type.
bool isExtFloatingPointInVTs(const std::vector<unsigned char> &EVTs);
/// isExtVectorinVTs - Return true if the specified extended value type
/// vector contains isVec or a vector value type.
/// vector contains vAny or a vector value type.
bool isExtVectorInVTs(const std::vector<unsigned char> &EVTs);
}