Improve MachineMemOperand handling.
- Allocate MachineMemOperands and MachineMemOperand lists in MachineFunctions.
This eliminates MachineInstr's std::list member and allows the data to be
created by isel and live for the remainder of codegen, avoiding a lot of
copying and unnecessary translation. This also shrinks MemSDNode.
- Delete MemOperandSDNode. Introduce MachineSDNode which has dedicated
fields for MachineMemOperands.
- Change MemSDNode to have a MachineMemOperand member instead of its own
fields with the same information. This introduces some redundancy, but
it's more consistent with what MachineInstr will eventually want.
- Ignore alignment when searching for redundant loads for CSE, but remember
the greatest alignment.
Target-specific code which previously used MemOperandSDNodes with generic
SDNodes now use MemIntrinsicSDNodes, with opcodes in a designated range
so that the SelectionDAG framework knows that MachineMemOperand information
is available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82794 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
index 51041ef..0a6816a 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
@@ -58,7 +58,6 @@
if (isa<ConstantPoolSDNode>(Node)) return true;
if (isa<JumpTableSDNode>(Node)) return true;
if (isa<ExternalSymbolSDNode>(Node)) return true;
- if (isa<MemOperandSDNode>(Node)) return true;
if (Node->getOpcode() == ISD::EntryToken) return true;
return false;
}
@@ -99,15 +98,11 @@
static unsigned CountResults(SDNode *Node);
/// CountOperands - The inputs to target nodes have any actual inputs first,
- /// followed by special operands that describe memory references, then an
- /// optional chain operand, then flag operands. Compute the number of
- /// actual operands that will go into the resulting MachineInstr.
+ /// followed by an optional chain operand, then flag operands. Compute
+ /// the number of actual operands that will go into the resulting
+ /// MachineInstr.
static unsigned CountOperands(SDNode *Node);
- /// ComputeMemOperandsEnd - Find the index one past the last
- /// MemOperandSDNode operand
- static unsigned ComputeMemOperandsEnd(SDNode *Node);
-
/// EmitNode - Generate machine code for an node and needed dependencies.
/// VRBaseMap contains, for each already emitted node, the first virtual
/// register number for the results of the node.