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422c27e8aa
Allows preserving MachineMemOperands on intrinsics through selection. For reasons I don't understand, this is a static property of the pattern and the selector deliberately goes out of its way to drop if not present. Intrinsics already inherit from SDPatternOperator allowing them to be used directly in instruction patterns. SDPatternOperator has a list of SDNodeProperty, but you currently can't set them on the intrinsic. Without SDNPMemOperand, when the node is selected any memory operands are always dropped. Allowing setting this on the intrinsics avoids needing to introduce another equivalent target node just to have SDNPMemOperand set. llvm-svn: 321212
35 lines
1.5 KiB
TableGen
35 lines
1.5 KiB
TableGen
//===- SDNodeProperties.td - Common code for DAG isels ---*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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class SDNodeProperty;
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// Selection DAG Pattern Operations
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class SDPatternOperator {
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list<SDNodeProperty> Properties = [];
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}
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//===----------------------------------------------------------------------===//
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// Selection DAG Node Properties.
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//
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// Note: These are hard coded into tblgen.
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//
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def SDNPCommutative : SDNodeProperty; // X op Y == Y op X
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def SDNPAssociative : SDNodeProperty; // (X op Y) op Z == X op (Y op Z)
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def SDNPHasChain : SDNodeProperty; // R/W chain operand and result
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def SDNPOutGlue : SDNodeProperty; // Write a flag result
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def SDNPInGlue : SDNodeProperty; // Read a flag operand
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def SDNPOptInGlue : SDNodeProperty; // Optionally read a flag operand
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def SDNPMayStore : SDNodeProperty; // May write to memory, sets 'mayStore'.
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def SDNPMayLoad : SDNodeProperty; // May read memory, sets 'mayLoad'.
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def SDNPSideEffect : SDNodeProperty; // Sets 'HasUnmodelledSideEffects'.
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def SDNPMemOperand : SDNodeProperty; // Touches memory, has assoc MemOperand
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def SDNPVariadic : SDNodeProperty; // Node has variable arguments.
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def SDNPWantRoot : SDNodeProperty; // ComplexPattern gets the root of match
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def SDNPWantParent : SDNodeProperty; // ComplexPattern gets the parent
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