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

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

1 files changed, 7 insertions, 7 deletions

diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index ba398093de..9b53ecc5db 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -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);
 }