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Add a bunch of new node types, including a new Void dummy register class

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7870 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-15 04:35:14 +00:00
parent 673537e5c0
commit b6ef5c860c
1 changed files with 16 additions and 1 deletions
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17
lib/Target/Target.td
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@ -86,6 +86,10 @@ class RegisterClass<ValueType regType, int alignment, list<Register> regList> {
// Methods - This member can be used to insert arbitrary code into a generated
// register class. The normal usage of this is to overload virtual methods.
code Methods = [{}];
// isDummyClass - If this is set to true, this register class is not really
// part of the target, it is just used for other purposes.
bit isDummyClass = 0;
}
@ -156,6 +160,7 @@ class Target {
// DAG node definitions used by the instruction selector...
//
class DagNodeValType;
def DNVT_any : DagNodeValType; // No constraint on tree node
def DNVT_void : DagNodeValType; // Tree node always returns void
def DNVT_val : DagNodeValType; // A non-void type
def DNVT_arg0 : DagNodeValType; // Tree node returns same type as Arg0
@ -177,7 +182,14 @@ class BuiltinDagNode<DagNodeValType Ret, list<DagNodeValType> Args,
}
// Magic nodes...
def set : DagNode<DNVT_void, [DNVT_val, DNVT_arg0]>;
def Void : RegisterClass<isVoid,0,[]> { let isDummyClass = 1; }
def set : DagNode<DNVT_void, [DNVT_val, DNVT_arg0]>;
def chain : BuiltinDagNode<DNVT_void, [DNVT_void, DNVT_void], "ChainNode">;
def blockchain : BuiltinDagNode<DNVT_void, [DNVT_void, DNVT_void],
"BlockChainNode">;
def ChainExpander : Expander<(chain Void, Void), []>;
def BlockChainExpander : Expander<(blockchain Void, Void), []>;
// Terminals...
def imm : BuiltinDagNode<DNVT_val, [], "Constant">;
@ -214,6 +226,9 @@ def br : BuiltinDagNode<DNVT_void, [DNVT_ptr], "Br">;
def brcond : BuiltinDagNode<DNVT_void, [DNVT_i8, DNVT_ptr, DNVT_ptr],
"BrCond">;
def unspec1 : BuiltinDagNode<DNVT_any , [DNVT_val], "Unspec1">;
def unspec2 : BuiltinDagNode<DNVT_any , [DNVT_val, DNVT_val], "Unspec2">;
//===----------------------------------------------------------------------===//
// DAG nonterminals definitions used by the instruction selector...
//