This increases the maximum for MVT::LAST_VALUETYPE

This change doubles the allowable value for MVT::LAST_VALUETYPE. It does
this by doing several things.

1. Introduces MVT::MAX_ALLOWED_LAST_VALUETYPE which in this change has a
value of 64.  This value contains the current maximum for the
MVT::LAST_VALUETYPE.

2. Instead of checking "MVT::LAST_VALUETYPE <= 32", all of those uses
now become "MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_LAST_VALUETYPE"

3. Changes the dimension of the ValueTypeActions from 2 elements to four
elements and adds comments ahead of the declaration indicating the it is
"(MVT::MAX_ALLOWED_LAST_VALUETYPE/32) * 2".  This at least lets us find
what is affected if and when MVT::MAX_ALLOWED_LAST_VALUETYPE gets
changed.

4. Adds initializers for the new elements of ValueTypeActions.

This does NOT add any types in MVT. That would be done separately.

This doubles the size of ValueTypeActions from 64 bits to 128 bits and
gives us the freedom to add more types for AVX.

llvm-svn: 74110

include/llvm/CodeGen/ValueTypes.h

@@ -1,3 +1,4 @@
+
 //===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
@@ -72,6 +73,11 @@ namespace llvm {
 
       LAST_VALUETYPE =  30,   // This always remains at the end of the list.
 
+      // This is the current maximum for LAST_VALUETYPE.
+      // Affects ValueTypeActions in TargetLowering.h.
+      // MVT::MAX_ALLOWED_VALUETYPE is used for asserts and to size bit vectors
+      MAX_ALLOWED_VALUETYPE = 64,
+
       // iPTRAny - An int value the size of the pointer of the current
       // target to any address space. This must only be used internal to
       // tblgen. Other than for overloading, we treat iPTRAny the same as iPTR.

include/llvm/Target/TargetLowering.h

@@ -173,14 +173,18 @@ public:
     /// ValueTypeActions - This is a bitvector that contains two bits for each
     /// value type, where the two bits correspond to the LegalizeAction enum.
     /// This can be queried with "getTypeAction(VT)".
-    uint32_t ValueTypeActions[2];
+    /// dimension by (MVT::MAX_ALLOWED_LAST_VALUETYPE/32) * 2
+    uint32_t ValueTypeActions[4];
   public:
     ValueTypeActionImpl() {
       ValueTypeActions[0] = ValueTypeActions[1] = 0;
+      ValueTypeActions[2] = ValueTypeActions[3] = 0;
     }
     ValueTypeActionImpl(const ValueTypeActionImpl &RHS) {
       ValueTypeActions[0] = RHS.ValueTypeActions[0];
       ValueTypeActions[1] = RHS.ValueTypeActions[1];
+      ValueTypeActions[2] = RHS.ValueTypeActions[2];
+      ValueTypeActions[3] = RHS.ValueTypeActions[3];
     }
     
     LegalizeAction getTypeAction(MVT VT) const {

lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

@@ -211,7 +211,7 @@ SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag,
                                            CodeGenOpt::Level ol)
   : TLI(dag.getTargetLoweringInfo()), DAG(dag), OptLevel(ol),
     ValueTypeActions(TLI.getValueTypeActions()) {
-  assert(MVT::LAST_VALUETYPE <= 32 &&
+  assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE &&
          "Too many value types for ValueTypeActions to hold!");
 }
 

lib/CodeGen/SelectionDAG/LegalizeTypes.h

@@ -159,7 +159,7 @@ public:
   explicit DAGTypeLegalizer(SelectionDAG &dag)
     : TLI(dag.getTargetLoweringInfo()), DAG(dag),
     ValueTypeActions(TLI.getValueTypeActions()) {
-    assert(MVT::LAST_VALUETYPE <= 32 &&
+    assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE &&
            "Too many value types for ValueTypeActions to hold!");
   }
 

lib/CodeGen/SelectionDAG/TargetLowering.cpp

@@ -527,7 +527,7 @@ TargetLowering::~TargetLowering() {}
 /// computeRegisterProperties - Once all of the register classes are added,
 /// this allows us to compute derived properties we expose.
 void TargetLowering::computeRegisterProperties() {
-  assert(MVT::LAST_VALUETYPE <= 32 &&
+  assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE &&
          "Too many value types for ValueTypeActions to hold!");
 
   // Everything defaults to needing one register.