Index: include/llvm/Target/TargetSelectionDAG.td
===================================================================
--- include/llvm/Target/TargetSelectionDAG.td
+++ include/llvm/Target/TargetSelectionDAG.td
@@ -649,6 +649,38 @@
   code PredicateCode = pred;
   code ImmediateCode = [{}];
   SDNodeXForm OperandTransform = xform;
+
+  // Define a few pre-packaged predicates. This helps GlobalISel import
+  // existing rules from SelectionDAG for many common cases.
+  // They will be tested prior to the code in pred and must not be used in
+  // ImmLeaf and its subclasses.
+
+  // cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
+  bit IsUnindexedLoad = ?;
+  // cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
+  bit IsUnindexedStore = ?;
+
+  // cast<LoadSDNode>(N)->getExtensionType() != ISD::NON_EXTLOAD
+  bit IsNonExtLoad = ?;
+  // cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD;
+  bit IsAnyExtLoad = ?;
+  // cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD;
+  bit IsSignExtLoad = ?;
+  // cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD;
+  bit IsZeroExtLoad = ?;
+  // !cast<StoreSDNode>(N)->isTruncatingStore();
+  bit IsNonTruncStore = ?;
+  // cast<StoreSDNode>(N)->isTruncatingStore();
+  bit IsTruncStore = ?;
+
+  // cast<LoadSDNode>(N)->getMemoryVT() == MVT::<VT>;
+  ValueType LoadMemoryVT = ?;
+  // cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::<VT>;
+  ValueType LoadScalarMemoryVT = ?;
+  // cast<StoreSDNode>(N)->getMemoryVT() == MVT::<VT>;
+  ValueType StoreMemoryVT = ?;
+  // cast<StoreSDNode>(N)->getMemoryVT().getScalarType() == MVT::<VT>;
+  ValueType StoreScalarMemoryVT = ?;
 }
 
 // OutPatFrag is a pattern fragment that is used as part of an output pattern
@@ -739,170 +771,170 @@
 def null_frag : SDPatternOperator;
 
 // load fragments.
-def unindexedload : PatFrag<(ops node:$ptr), (ld node:$ptr), [{
-  return cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
-}]>;
-def load : PatFrag<(ops node:$ptr), (unindexedload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getExtensionType() == ISD::NON_EXTLOAD;
-}]>;
+def unindexedload : PatFrag<(ops node:$ptr), (ld node:$ptr)> {
+  let IsUnindexedLoad = 1;
+}
+def load : PatFrag<(ops node:$ptr), (unindexedload node:$ptr)> {
+  let IsNonExtLoad = 1;
+}
 
 // extending load fragments.
-def extload   : PatFrag<(ops node:$ptr), (unindexedload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD;
-}]>;
-def sextload  : PatFrag<(ops node:$ptr), (unindexedload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD;
-}]>;
-def zextload  : PatFrag<(ops node:$ptr), (unindexedload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD;
-}]>;
+def extload   : PatFrag<(ops node:$ptr), (unindexedload node:$ptr)> {
+  let IsAnyExtLoad = 1;
+}
+def sextload  : PatFrag<(ops node:$ptr), (unindexedload node:$ptr)> {
+  let IsSignExtLoad = 1;
+}
+def zextload  : PatFrag<(ops node:$ptr), (unindexedload node:$ptr)> {
+  let IsZeroExtLoad = 1;
+}
 
-def extloadi1  : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i1;
-}]>;
-def extloadi8  : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
-def extloadi16 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
-def extloadi32 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
-def extloadf32 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::f32;
-}]>;
-def extloadf64 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::f64;
-}]>;
+def extloadi1  : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = i1;
+}
+def extloadi8  : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = i8;
+}
+def extloadi16 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = i16;
+}
+def extloadi32 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = i32;
+}
+def extloadf32 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = f32;
+}
+def extloadf64 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadMemoryVT = f64;
+}
 
-def sextloadi1  : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i1;
-}]>;
-def sextloadi8  : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
-def sextloadi16 : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
-def sextloadi32 : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
+def sextloadi1  : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadMemoryVT = i1;
+}
+def sextloadi8  : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadMemoryVT = i8;
+}
+def sextloadi16 : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadMemoryVT = i16;
+}
+def sextloadi32 : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadMemoryVT = i32;
+}
 
-def zextloadi1  : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i1;
-}]>;
-def zextloadi8  : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
-def zextloadi16 : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
-def zextloadi32 : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
+def zextloadi1  : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadMemoryVT = i1;
+}
+def zextloadi8  : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadMemoryVT = i8;
+}
+def zextloadi16 : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadMemoryVT = i16;
+}
+def zextloadi32 : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadMemoryVT = i32;
+}
 
-def extloadvi1  : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i1;
-}]>;
-def extloadvi8  : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i8;
-}]>;
-def extloadvi16 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i16;
-}]>;
-def extloadvi32 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i32;
-}]>;
-def extloadvf32 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::f32;
-}]>;
-def extloadvf64 : PatFrag<(ops node:$ptr), (extload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::f64;
-}]>;
+def extloadvi1  : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = i1;
+}
+def extloadvi8  : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = i8;
+}
+def extloadvi16 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = i16;
+}
+def extloadvi32 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = i32;
+}
+def extloadvf32 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = f32;
+}
+def extloadvf64 : PatFrag<(ops node:$ptr), (extload node:$ptr)> {
+  let LoadScalarMemoryVT = f64;
+}
 
-def sextloadvi1  : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i1;
-}]>;
-def sextloadvi8  : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i8;
-}]>;
-def sextloadvi16 : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i16;
-}]>;
-def sextloadvi32 : PatFrag<(ops node:$ptr), (sextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i32;
-}]>;
+def sextloadvi1  : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadScalarMemoryVT = i1;
+}
+def sextloadvi8  : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadScalarMemoryVT = i8;
+}
+def sextloadvi16 : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadScalarMemoryVT = i16;
+}
+def sextloadvi32 : PatFrag<(ops node:$ptr), (sextload node:$ptr)> {
+  let LoadScalarMemoryVT = i32;
+}
 
-def zextloadvi1  : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i1;
-}]>;
-def zextloadvi8  : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i8;
-}]>;
-def zextloadvi16 : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i16;
-}]>;
-def zextloadvi32 : PatFrag<(ops node:$ptr), (zextload node:$ptr), [{
-  return cast<LoadSDNode>(N)->getMemoryVT().getScalarType() == MVT::i32;
-}]>;
+def zextloadvi1  : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadScalarMemoryVT = i1;
+}
+def zextloadvi8  : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadScalarMemoryVT = i8;
+}
+def zextloadvi16 : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadScalarMemoryVT = i16;
+}
+def zextloadvi32 : PatFrag<(ops node:$ptr), (zextload node:$ptr)> {
+  let LoadScalarMemoryVT = i32;
+}
 
 // store fragments.
 def unindexedstore : PatFrag<(ops node:$val, node:$ptr),
-                             (st node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
-}]>;
+                             (st node:$val, node:$ptr)> {
+  let IsUnindexedStore = 1;
+}
 def store : PatFrag<(ops node:$val, node:$ptr),
-                    (unindexedstore node:$val, node:$ptr), [{
-  return !cast<StoreSDNode>(N)->isTruncatingStore();
-}]>;
+                    (unindexedstore node:$val, node:$ptr)> {
+  let IsNonTruncStore = 1;
+}
 
 // truncstore fragments.
 def truncstore : PatFrag<(ops node:$val, node:$ptr),
-                         (unindexedstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->isTruncatingStore();
-}]>;
+                         (unindexedstore node:$val, node:$ptr)> {
+  let IsTruncStore = 1;
+}
 def truncstorei8 : PatFrag<(ops node:$val, node:$ptr),
-                           (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
+                           (truncstore node:$val, node:$ptr)> {
+  let StoreMemoryVT = i8;
+}
 def truncstorei16 : PatFrag<(ops node:$val, node:$ptr),
-                            (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
+                            (truncstore node:$val, node:$ptr)> {
+  let StoreMemoryVT = i16;
+}
 def truncstorei32 : PatFrag<(ops node:$val, node:$ptr),
-                            (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
+                            (truncstore node:$val, node:$ptr)> {
+  let StoreMemoryVT = i32;
+}
 def truncstoref32 : PatFrag<(ops node:$val, node:$ptr),
-                            (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::f32;
-}]>;
+                            (truncstore node:$val, node:$ptr)> {
+  let StoreMemoryVT = f32;
+}
 def truncstoref64 : PatFrag<(ops node:$val, node:$ptr),
-                            (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::f64;
-}]>;
+                            (truncstore node:$val, node:$ptr)> {
+  let StoreMemoryVT = f64;
+}
 
 def truncstorevi8 : PatFrag<(ops node:$val, node:$ptr),
-                            (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT().getScalarType() == MVT::i8;
-}]>;
+                            (truncstore node:$val, node:$ptr)> {
+  let StoreScalarMemoryVT = i8;
+}
 
 def truncstorevi16 : PatFrag<(ops node:$val, node:$ptr),
-                             (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT().getScalarType() == MVT::i16;
-}]>;
+                             (truncstore node:$val, node:$ptr)> {
+  let StoreScalarMemoryVT = i16;
+}
 
 def truncstorevi32 : PatFrag<(ops node:$val, node:$ptr),
-                             (truncstore node:$val, node:$ptr), [{
-  return cast<StoreSDNode>(N)->getMemoryVT().getScalarType() == MVT::i32;
-}]>;
+                             (truncstore node:$val, node:$ptr)> {
+  let StoreScalarMemoryVT = i32;
+}
 
 // indexed store fragments.
 def istore : PatFrag<(ops node:$val, node:$base, node:$offset),
-                     (ist node:$val, node:$base, node:$offset), [{
-  return !cast<StoreSDNode>(N)->isTruncatingStore();
-}]>;
+                     (ist node:$val, node:$base, node:$offset)> {
+  let IsNonTruncStore = 1;
+}
 
 def pre_store : PatFrag<(ops node:$val, node:$base, node:$offset),
                         (istore node:$val, node:$base, node:$offset), [{
@@ -911,34 +943,34 @@
 }]>;
 
 def itruncstore : PatFrag<(ops node:$val, node:$base, node:$offset),
-                          (ist node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->isTruncatingStore();
-}]>;
+                          (ist node:$val, node:$base, node:$offset)> {
+  let IsTruncStore = 1;
+}
 def pre_truncst : PatFrag<(ops node:$val, node:$base, node:$offset),
                           (itruncstore node:$val, node:$base, node:$offset), [{
   ISD::MemIndexedMode AM = cast<StoreSDNode>(N)->getAddressingMode();
   return AM == ISD::PRE_INC || AM == ISD::PRE_DEC;
 }]>;
 def pre_truncsti1 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                            (pre_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i1;
-}]>;
+                            (pre_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i1;
+}
 def pre_truncsti8 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                            (pre_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
+                            (pre_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i8;
+}
 def pre_truncsti16 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                             (pre_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
+                             (pre_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i16;
+}
 def pre_truncsti32 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                             (pre_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
+                             (pre_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i32;
+}
 def pre_truncstf32 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                             (pre_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::f32;
-}]>;
+                             (pre_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = f32;
+}
 
 def post_store : PatFrag<(ops node:$val, node:$ptr, node:$offset),
                          (istore node:$val, node:$ptr, node:$offset), [{
@@ -952,25 +984,25 @@
   return AM == ISD::POST_INC || AM == ISD::POST_DEC;
 }]>;
 def post_truncsti1 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                             (post_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i1;
-}]>;
+                             (post_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i1;
+}
 def post_truncsti8 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                             (post_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i8;
-}]>;
+                             (post_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i8;
+}
 def post_truncsti16 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                              (post_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i16;
-}]>;
+                              (post_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i16;
+}
 def post_truncsti32 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                              (post_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::i32;
-}]>;
+                              (post_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = i32;
+}
 def post_truncstf32 : PatFrag<(ops node:$val, node:$base, node:$offset),
-                              (post_truncst node:$val, node:$base, node:$offset), [{
-  return cast<StoreSDNode>(N)->getMemoryVT() == MVT::f32;
-}]>;
+                              (post_truncst node:$val, node:$base, node:$offset)> {
+  let StoreMemoryVT = f32;
+}
 
 // nontemporal store fragments.
 def nontemporalstore : PatFrag<(ops node:$val, node:$ptr),
Index: utils/TableGen/CodeGenDAGPatterns.h
===================================================================
--- utils/TableGen/CodeGenDAGPatterns.h
+++ utils/TableGen/CodeGenDAGPatterns.h
@@ -484,6 +484,38 @@
   /// Get the opcode used to check this predicate.
   std::string getGlobalISelMatchOpcode() const;
 
+  /// Is this predicate the predefined unindexed load predicate?
+  bool isUnindexedLoad() const;
+  /// Is this predicate the predefined unindexed store predicate?
+  bool isUnindexedStore() const;
+  /// Is this predicate the predefined non-extending load predicate?
+  bool isNonExtLoad() const;
+  /// Is this predicate the predefined any-extend load predicate?
+  bool isAnyExtLoad() const;
+  /// Is this predicate the predefined sign-extend load predicate?
+  bool isSignExtLoad() const;
+  /// Is this predicate the predefined zero-extend load predicate?
+  bool isZeroExtLoad() const;
+  /// Is this predicate the predefined non-truncating store predicate?
+  bool isNonTruncStore() const;
+  /// Is this predicate the predefined truncating store predicate?
+  bool isTruncStore() const;
+
+  /// If non-null, indicates that this predicate is a predefined memory VT
+  /// predicate for a load and returns the ValueType record for the memory VT.
+  Record *getLoadMemoryVT() const;
+  /// If non-null, indicates that this predicate is a predefined memory VT
+  /// predicate (checking only the scalar type) for load and returns the
+  /// ValueType record for the memory VT.
+  Record *getLoadScalarMemoryVT() const;
+  /// If non-null, indicates that this predicate is a predefined memory VT
+  /// predicate for a store and returns the ValueType record for the memory VT.
+  Record *getStoreMemoryVT() const;
+  /// If non-null, indicates that this predicate is a predefined memory VT
+  /// predicate (checking only the scalar type) for a store and returns the
+  /// ValueType record for the memory VT.
+  Record *getStoreScalarMemoryVT() const;
+
 private:
   std::string getPredCode() const;
   std::string getImmCode() const;
@@ -493,6 +525,8 @@
   /// Get a string that describes the type returned by getImmType() but is
   /// usable as part of an identifier.
   std::string getImmTypeIdentifier() const;
+
+  bool isPredefinedPredicateEnabled(StringRef Field) const;
 };
 
 
Index: utils/TableGen/CodeGenDAGPatterns.cpp
===================================================================
--- utils/TableGen/CodeGenDAGPatterns.cpp
+++ utils/TableGen/CodeGenDAGPatterns.cpp
@@ -855,7 +855,69 @@
 }
 
 std::string TreePredicateFn::getPredCode() const {
-  return PatFragRec->getRecord()->getValueAsString("PredicateCode");
+  std::string Code = "";
+
+  if (isUnindexedLoad() && isUnindexedStore())
+    PrintFatalError(
+        getOrigPatFragRecord()->getRecord()->getLoc(),
+        "IsUnindexedLoad and IsUnindexedStore are mutually exclusive");
+  if (isUnindexedLoad())
+    Code += "if (cast<LoadSDNode>(N)->getAddressingMode() != ISD::UNINDEXED) return false;\n";
+  if (isUnindexedStore())
+    Code += "if (cast<StoreSDNode>(N)->getAddressingMode() != ISD::UNINDEXED) return false;\n";
+
+  if ((isNonExtLoad() + isAnyExtLoad() + isSignExtLoad() + isZeroExtLoad() +
+       isNonTruncStore() + isTruncStore()) > 1)
+    PrintFatalError(getOrigPatFragRecord()->getRecord()->getLoc(),
+                    "IsNonExtLoad, IsAnyExtLoad, IsSignExtLoad, IsZeroExtLoad, "
+                    "IsNonTruncStore, and IsTruncStore are mutually exclusive");
+  if (isNonExtLoad())
+    Code += "if (cast<LoadSDNode>(N)->getExtensionType() != ISD::NON_EXTLOAD) return false;\n";
+  if (isAnyExtLoad())
+    Code += "if (cast<LoadSDNode>(N)->getExtensionType() != ISD::EXTLOAD) return false;\n";
+  if (isSignExtLoad())
+    Code += "if (cast<LoadSDNode>(N)->getExtensionType() != ISD::SEXTLOAD) return false;\n";
+  if (isZeroExtLoad())
+    Code += "if (cast<LoadSDNode>(N)->getExtensionType() != ISD::ZEXTLOAD) return false;\n";
+  if (isNonTruncStore())
+    Code += " if (cast<StoreSDNode>(N)->isTruncatingStore()) return false;\n";
+  if (isTruncStore())
+    Code += " if (!cast<StoreSDNode>(N)->isTruncatingStore()) return false;\n";
+
+  Record *LoadMemoryVT = getLoadMemoryVT();
+  Record *LoadScalarMemoryVT = getLoadScalarMemoryVT();
+  Record *StoreMemoryVT = getStoreMemoryVT();
+  Record *StoreScalarMemoryVT = getStoreScalarMemoryVT();
+
+  if ((LoadMemoryVT || LoadScalarMemoryVT) && (StoreMemoryVT || StoreScalarMemoryVT))
+    PrintFatalError(getOrigPatFragRecord()->getRecord()->getLoc(),
+                    "Root of PatFrag cannot be both a load and a store");
+  if (LoadMemoryVT)
+    Code += ("if (cast<LoadSDNode>(N)->getMemoryVT() != MVT::" +
+             LoadMemoryVT->getName() + ") return false;\n")
+                .str();
+  if (LoadScalarMemoryVT)
+    Code += ("if (cast<LoadSDNode>(N)->getMemoryVT().getScalarType() != MVT::" +
+             LoadScalarMemoryVT->getName() + ") return false;\n")
+                .str();
+  if (StoreMemoryVT)
+    Code += ("if (cast<StoreSDNode>(N)->getMemoryVT() != MVT::" +
+             StoreMemoryVT->getName() + ") return false;\n")
+                .str();
+  if (StoreScalarMemoryVT)
+    Code +=
+        ("if (cast<StoreSDNode>(N)->getMemoryVT().getScalarType() != MVT::" +
+         StoreScalarMemoryVT->getName() + ") return false;\n")
+            .str();
+
+  std::string PredicateCode = PatFragRec->getRecord()->getValueAsString("PredicateCode");
+
+  Code += PredicateCode;
+
+  if (PredicateCode.empty() && !Code.empty())
+    Code += "return true;\n";
+
+  return Code;
 }
 
 std::string TreePredicateFn::getImmCode() const {
@@ -873,6 +935,60 @@
                                                                    Unset);
 }
 
+bool TreePredicateFn::isPredefinedPredicateEnabled(StringRef Field) const {
+  bool Unset;
+  return getOrigPatFragRecord()->getRecord()->getValueAsBitOrUnset(Field,
+                                                                   Unset);
+}
+bool TreePredicateFn::isUnindexedLoad() const {
+  return isPredefinedPredicateEnabled("IsUnindexedLoad");
+}
+bool TreePredicateFn::isUnindexedStore() const {
+  return isPredefinedPredicateEnabled("IsUnindexedStore");
+}
+bool TreePredicateFn::isNonExtLoad() const {
+  return isPredefinedPredicateEnabled("IsNonExtLoad");
+}
+bool TreePredicateFn::isAnyExtLoad() const {
+  return isPredefinedPredicateEnabled("IsAnyExtLoad");
+}
+bool TreePredicateFn::isSignExtLoad() const {
+  return isPredefinedPredicateEnabled("IsSignExtLoad");
+}
+bool TreePredicateFn::isZeroExtLoad() const {
+  return isPredefinedPredicateEnabled("IsZeroExtLoad");
+}
+bool TreePredicateFn::isNonTruncStore() const {
+  return isPredefinedPredicateEnabled("IsNonTruncStore");
+}
+bool TreePredicateFn::isTruncStore() const {
+  return isPredefinedPredicateEnabled("IsTruncStore");
+}
+Record *TreePredicateFn::getLoadMemoryVT() const {
+  Record *R = getOrigPatFragRecord()->getRecord();
+  if (R->isValueUnset("LoadMemoryVT"))
+    return nullptr;
+  return R->getValueAsDef("LoadMemoryVT");
+}
+Record *TreePredicateFn::getLoadScalarMemoryVT() const {
+  Record *R = getOrigPatFragRecord()->getRecord();
+  if (R->isValueUnset("LoadScalarMemoryVT"))
+    return nullptr;
+  return R->getValueAsDef("LoadScalarMemoryVT");
+}
+Record *TreePredicateFn::getStoreMemoryVT() const {
+  Record *R = getOrigPatFragRecord()->getRecord();
+  if (R->isValueUnset("StoreMemoryVT"))
+    return nullptr;
+  return R->getValueAsDef("StoreMemoryVT");
+}
+Record *TreePredicateFn::getStoreScalarMemoryVT() const {
+  Record *R = getOrigPatFragRecord()->getRecord();
+  if (R->isValueUnset("StoreScalarMemoryVT"))
+    return nullptr;
+  return R->getValueAsDef("StoreScalarMemoryVT");
+}
+
 std::string TreePredicateFn::getImmType() const {
   if (immCodeUsesAPInt())
     return "const APInt &";
Index: utils/TableGen/GlobalISelEmitter.cpp
===================================================================
--- utils/TableGen/GlobalISelEmitter.cpp
+++ utils/TableGen/GlobalISelEmitter.cpp
@@ -158,6 +158,34 @@
       Explanation += " always-true";
     if (P.isImmediatePattern())
       Explanation += " immediate";
+
+    if (P.isUnindexedLoad())
+      Explanation += " unindexed-load";
+    if (P.isUnindexedStore())
+      Explanation += " unindexed-store";
+
+    if (P.isNonExtLoad())
+      Explanation += " non-extload";
+    if (P.isAnyExtLoad())
+      Explanation += " extload";
+    if (P.isSignExtLoad())
+      Explanation += " sextload";
+    if (P.isZeroExtLoad())
+      Explanation += " zextload";
+
+    if (P.isNonTruncStore())
+      Explanation += " non-truncstore";
+    if (P.isTruncStore())
+      Explanation += " truncstore";
+
+    if (Record *VT = P.getLoadMemoryVT())
+      Explanation += (" LoadMemVT=" + VT->getName()).str();
+    if (Record *VT = P.getLoadScalarMemoryVT())
+      Explanation += (" ScalarVT(LoadMemVT)=" + VT->getName()).str();
+    if (Record *VT = P.getStoreMemoryVT())
+      Explanation += (" StoreMemVT=" + VT->getName()).str();
+    if (Record *VT = P.getStoreScalarMemoryVT())
+      Explanation += (" ScalarVT(StoreMemVT)=" + VT->getName()).str();
   }
   return Explanation;
 }
@@ -192,6 +220,9 @@
     HasUnsupportedPredicate = true;
     Explanation = Separator + "Has a predicate (" + explainPredicates(N) + ")";
     Separator = ", ";
+    Explanation += (Separator + "first-failing:" +
+                    Predicate.getOrigPatFragRecord()->getRecord()->getName())
+                       .str();
     break;
   }