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Before this we were producing a TargetExternalSymbol from a MCSymbol. That meant extracting the symbol name and fetching the symbol again down the pipeline. This patch adds a DAG.getMCSymbol that lets the MCSymbol pass unchanged on the DAG. Doing so removes the need for MO_NOPREFIX and fixes the root cause of pr23900, allowing r240130 to be committed again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240300 91177308-0d34-0410-b5e6-96231b3b80d8
1299 lines
57 KiB
C++
1299 lines
57 KiB
C++
//===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===//
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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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//
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// This file declares the SelectionDAG class, and transitively defines the
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// SDNode class and subclasses.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_SELECTIONDAG_H
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#define LLVM_CODEGEN_SELECTIONDAG_H
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/ilist.h"
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#include "llvm/CodeGen/DAGCombine.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/SelectionDAGNodes.h"
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#include "llvm/Support/RecyclingAllocator.h"
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#include "llvm/Target/TargetMachine.h"
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#include <cassert>
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#include <map>
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#include <string>
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#include <vector>
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namespace llvm {
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class AliasAnalysis;
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class MachineConstantPoolValue;
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class MachineFunction;
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class MDNode;
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class SDDbgValue;
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class TargetLowering;
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class TargetSelectionDAGInfo;
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class SDVTListNode : public FoldingSetNode {
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friend struct FoldingSetTrait<SDVTListNode>;
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/// A reference to an Interned FoldingSetNodeID for this node.
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/// The Allocator in SelectionDAG holds the data.
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/// SDVTList contains all types which are frequently accessed in SelectionDAG.
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/// The size of this list is not expected to be big so it won't introduce
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/// a memory penalty.
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FoldingSetNodeIDRef FastID;
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const EVT *VTs;
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unsigned int NumVTs;
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/// The hash value for SDVTList is fixed, so cache it to avoid
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/// hash calculation.
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unsigned HashValue;
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public:
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SDVTListNode(const FoldingSetNodeIDRef ID, const EVT *VT, unsigned int Num) :
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FastID(ID), VTs(VT), NumVTs(Num) {
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HashValue = ID.ComputeHash();
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}
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SDVTList getSDVTList() {
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SDVTList result = {VTs, NumVTs};
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return result;
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}
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};
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/// Specialize FoldingSetTrait for SDVTListNode
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/// to avoid computing temp FoldingSetNodeID and hash value.
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template<> struct FoldingSetTrait<SDVTListNode> : DefaultFoldingSetTrait<SDVTListNode> {
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static void Profile(const SDVTListNode &X, FoldingSetNodeID& ID) {
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ID = X.FastID;
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}
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static bool Equals(const SDVTListNode &X, const FoldingSetNodeID &ID,
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unsigned IDHash, FoldingSetNodeID &TempID) {
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if (X.HashValue != IDHash)
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return false;
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return ID == X.FastID;
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}
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static unsigned ComputeHash(const SDVTListNode &X, FoldingSetNodeID &TempID) {
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return X.HashValue;
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}
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};
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template<> struct ilist_traits<SDNode> : public ilist_default_traits<SDNode> {
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private:
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mutable ilist_half_node<SDNode> Sentinel;
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public:
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SDNode *createSentinel() const {
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return static_cast<SDNode*>(&Sentinel);
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}
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static void destroySentinel(SDNode *) {}
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SDNode *provideInitialHead() const { return createSentinel(); }
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SDNode *ensureHead(SDNode*) const { return createSentinel(); }
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static void noteHead(SDNode*, SDNode*) {}
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static void deleteNode(SDNode *) {
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llvm_unreachable("ilist_traits<SDNode> shouldn't see a deleteNode call!");
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}
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private:
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static void createNode(const SDNode &);
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};
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/// Keeps track of dbg_value information through SDISel. We do
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/// not build SDNodes for these so as not to perturb the generated code;
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/// instead the info is kept off to the side in this structure. Each SDNode may
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/// have one or more associated dbg_value entries. This information is kept in
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/// DbgValMap.
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/// Byval parameters are handled separately because they don't use alloca's,
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/// which busts the normal mechanism. There is good reason for handling all
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/// parameters separately: they may not have code generated for them, they
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/// should always go at the beginning of the function regardless of other code
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/// motion, and debug info for them is potentially useful even if the parameter
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/// is unused. Right now only byval parameters are handled separately.
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class SDDbgInfo {
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BumpPtrAllocator Alloc;
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SmallVector<SDDbgValue*, 32> DbgValues;
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SmallVector<SDDbgValue*, 32> ByvalParmDbgValues;
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typedef DenseMap<const SDNode*, SmallVector<SDDbgValue*, 2> > DbgValMapType;
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DbgValMapType DbgValMap;
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void operator=(const SDDbgInfo&) = delete;
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SDDbgInfo(const SDDbgInfo&) = delete;
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public:
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SDDbgInfo() {}
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void add(SDDbgValue *V, const SDNode *Node, bool isParameter) {
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if (isParameter) {
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ByvalParmDbgValues.push_back(V);
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} else DbgValues.push_back(V);
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if (Node)
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DbgValMap[Node].push_back(V);
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}
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/// \brief Invalidate all DbgValues attached to the node and remove
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/// it from the Node-to-DbgValues map.
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void erase(const SDNode *Node);
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void clear() {
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DbgValMap.clear();
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DbgValues.clear();
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ByvalParmDbgValues.clear();
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Alloc.Reset();
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}
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BumpPtrAllocator &getAlloc() { return Alloc; }
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bool empty() const {
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return DbgValues.empty() && ByvalParmDbgValues.empty();
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}
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ArrayRef<SDDbgValue*> getSDDbgValues(const SDNode *Node) {
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DbgValMapType::iterator I = DbgValMap.find(Node);
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if (I != DbgValMap.end())
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return I->second;
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return ArrayRef<SDDbgValue*>();
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}
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typedef SmallVectorImpl<SDDbgValue*>::iterator DbgIterator;
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DbgIterator DbgBegin() { return DbgValues.begin(); }
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DbgIterator DbgEnd() { return DbgValues.end(); }
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DbgIterator ByvalParmDbgBegin() { return ByvalParmDbgValues.begin(); }
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DbgIterator ByvalParmDbgEnd() { return ByvalParmDbgValues.end(); }
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};
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class SelectionDAG;
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void checkForCycles(const SelectionDAG *DAG, bool force = false);
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/// This is used to represent a portion of an LLVM function in a low-level
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/// Data Dependence DAG representation suitable for instruction selection.
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/// This DAG is constructed as the first step of instruction selection in order
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/// to allow implementation of machine specific optimizations
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/// and code simplifications.
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///
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/// The representation used by the SelectionDAG is a target-independent
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/// representation, which has some similarities to the GCC RTL representation,
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/// but is significantly more simple, powerful, and is a graph form instead of a
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/// linear form.
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///
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class SelectionDAG {
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const TargetMachine &TM;
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const TargetSelectionDAGInfo *TSI;
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const TargetLowering *TLI;
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MachineFunction *MF;
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LLVMContext *Context;
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CodeGenOpt::Level OptLevel;
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/// The starting token.
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SDNode EntryNode;
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/// The root of the entire DAG.
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SDValue Root;
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/// A linked list of nodes in the current DAG.
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ilist<SDNode> AllNodes;
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/// The AllocatorType for allocating SDNodes. We use
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/// pool allocation with recycling.
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typedef RecyclingAllocator<BumpPtrAllocator, SDNode, sizeof(LargestSDNode),
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AlignOf<MostAlignedSDNode>::Alignment>
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NodeAllocatorType;
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/// Pool allocation for nodes.
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NodeAllocatorType NodeAllocator;
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/// This structure is used to memoize nodes, automatically performing
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/// CSE with existing nodes when a duplicate is requested.
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FoldingSet<SDNode> CSEMap;
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/// Pool allocation for machine-opcode SDNode operands.
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BumpPtrAllocator OperandAllocator;
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/// Pool allocation for misc. objects that are created once per SelectionDAG.
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BumpPtrAllocator Allocator;
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/// Tracks dbg_value information through SDISel.
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SDDbgInfo *DbgInfo;
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public:
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/// Clients of various APIs that cause global effects on
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/// the DAG can optionally implement this interface. This allows the clients
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/// to handle the various sorts of updates that happen.
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///
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/// A DAGUpdateListener automatically registers itself with DAG when it is
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/// constructed, and removes itself when destroyed in RAII fashion.
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struct DAGUpdateListener {
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DAGUpdateListener *const Next;
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SelectionDAG &DAG;
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explicit DAGUpdateListener(SelectionDAG &D)
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: Next(D.UpdateListeners), DAG(D) {
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DAG.UpdateListeners = this;
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}
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virtual ~DAGUpdateListener() {
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assert(DAG.UpdateListeners == this &&
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"DAGUpdateListeners must be destroyed in LIFO order");
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DAG.UpdateListeners = Next;
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}
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/// The node N that was deleted and, if E is not null, an
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/// equivalent node E that replaced it.
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virtual void NodeDeleted(SDNode *N, SDNode *E);
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/// The node N that was updated.
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virtual void NodeUpdated(SDNode *N);
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};
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/// When true, additional steps are taken to
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/// ensure that getConstant() and similar functions return DAG nodes that
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/// have legal types. This is important after type legalization since
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/// any illegally typed nodes generated after this point will not experience
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/// type legalization.
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bool NewNodesMustHaveLegalTypes;
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private:
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/// DAGUpdateListener is a friend so it can manipulate the listener stack.
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friend struct DAGUpdateListener;
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/// Linked list of registered DAGUpdateListener instances.
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/// This stack is maintained by DAGUpdateListener RAII.
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DAGUpdateListener *UpdateListeners;
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/// Implementation of setSubgraphColor.
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/// Return whether we had to truncate the search.
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bool setSubgraphColorHelper(SDNode *N, const char *Color,
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DenseSet<SDNode *> &visited,
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int level, bool &printed);
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void operator=(const SelectionDAG&) = delete;
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SelectionDAG(const SelectionDAG&) = delete;
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public:
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explicit SelectionDAG(const TargetMachine &TM, llvm::CodeGenOpt::Level);
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~SelectionDAG();
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/// Prepare this SelectionDAG to process code in the given MachineFunction.
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void init(MachineFunction &mf);
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/// Clear state and free memory necessary to make this
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/// SelectionDAG ready to process a new block.
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void clear();
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MachineFunction &getMachineFunction() const { return *MF; }
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const TargetMachine &getTarget() const { return TM; }
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const TargetSubtargetInfo &getSubtarget() const { return MF->getSubtarget(); }
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const TargetLowering &getTargetLoweringInfo() const { return *TLI; }
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const TargetSelectionDAGInfo &getSelectionDAGInfo() const { return *TSI; }
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LLVMContext *getContext() const {return Context; }
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/// Pop up a GraphViz/gv window with the DAG rendered using 'dot'.
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void viewGraph(const std::string &Title);
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void viewGraph();
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#ifndef NDEBUG
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std::map<const SDNode *, std::string> NodeGraphAttrs;
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#endif
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/// Clear all previously defined node graph attributes.
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/// Intended to be used from a debugging tool (eg. gdb).
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void clearGraphAttrs();
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/// Set graph attributes for a node. (eg. "color=red".)
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void setGraphAttrs(const SDNode *N, const char *Attrs);
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/// Get graph attributes for a node. (eg. "color=red".)
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/// Used from getNodeAttributes.
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const std::string getGraphAttrs(const SDNode *N) const;
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/// Convenience for setting node color attribute.
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void setGraphColor(const SDNode *N, const char *Color);
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/// Convenience for setting subgraph color attribute.
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void setSubgraphColor(SDNode *N, const char *Color);
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typedef ilist<SDNode>::const_iterator allnodes_const_iterator;
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allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); }
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allnodes_const_iterator allnodes_end() const { return AllNodes.end(); }
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typedef ilist<SDNode>::iterator allnodes_iterator;
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allnodes_iterator allnodes_begin() { return AllNodes.begin(); }
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allnodes_iterator allnodes_end() { return AllNodes.end(); }
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ilist<SDNode>::size_type allnodes_size() const {
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return AllNodes.size();
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}
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/// Return the root tag of the SelectionDAG.
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const SDValue &getRoot() const { return Root; }
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/// Return the token chain corresponding to the entry of the function.
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SDValue getEntryNode() const {
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return SDValue(const_cast<SDNode *>(&EntryNode), 0);
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}
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/// Set the current root tag of the SelectionDAG.
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///
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const SDValue &setRoot(SDValue N) {
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assert((!N.getNode() || N.getValueType() == MVT::Other) &&
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"DAG root value is not a chain!");
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if (N.getNode())
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checkForCycles(N.getNode(), this);
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Root = N;
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if (N.getNode())
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checkForCycles(this);
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return Root;
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}
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/// This iterates over the nodes in the SelectionDAG, folding
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/// certain types of nodes together, or eliminating superfluous nodes. The
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/// Level argument controls whether Combine is allowed to produce nodes and
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/// types that are illegal on the target.
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void Combine(CombineLevel Level, AliasAnalysis &AA,
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CodeGenOpt::Level OptLevel);
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/// This transforms the SelectionDAG into a SelectionDAG that
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/// only uses types natively supported by the target.
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/// Returns "true" if it made any changes.
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///
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/// Note that this is an involved process that may invalidate pointers into
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/// the graph.
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bool LegalizeTypes();
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/// This transforms the SelectionDAG into a SelectionDAG that is
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/// compatible with the target instruction selector, as indicated by the
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/// TargetLowering object.
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///
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/// Note that this is an involved process that may invalidate pointers into
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/// the graph.
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void Legalize();
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/// \brief Transforms a SelectionDAG node and any operands to it into a node
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/// that is compatible with the target instruction selector, as indicated by
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/// the TargetLowering object.
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///
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/// \returns true if \c N is a valid, legal node after calling this.
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///
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/// This essentially runs a single recursive walk of the \c Legalize process
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/// over the given node (and its operands). This can be used to incrementally
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/// legalize the DAG. All of the nodes which are directly replaced,
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/// potentially including N, are added to the output parameter \c
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/// UpdatedNodes so that the delta to the DAG can be understood by the
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/// caller.
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///
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/// When this returns false, N has been legalized in a way that make the
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/// pointer passed in no longer valid. It may have even been deleted from the
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/// DAG, and so it shouldn't be used further. When this returns true, the
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/// N passed in is a legal node, and can be immediately processed as such.
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/// This may still have done some work on the DAG, and will still populate
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/// UpdatedNodes with any new nodes replacing those originally in the DAG.
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bool LegalizeOp(SDNode *N, SmallSetVector<SDNode *, 16> &UpdatedNodes);
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/// This transforms the SelectionDAG into a SelectionDAG
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/// that only uses vector math operations supported by the target. This is
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/// necessary as a separate step from Legalize because unrolling a vector
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/// operation can introduce illegal types, which requires running
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/// LegalizeTypes again.
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///
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/// This returns true if it made any changes; in that case, LegalizeTypes
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/// is called again before Legalize.
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///
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/// Note that this is an involved process that may invalidate pointers into
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/// the graph.
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bool LegalizeVectors();
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/// This method deletes all unreachable nodes in the SelectionDAG.
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void RemoveDeadNodes();
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/// Remove the specified node from the system. This node must
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/// have no referrers.
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void DeleteNode(SDNode *N);
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/// Return an SDVTList that represents the list of values specified.
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SDVTList getVTList(EVT VT);
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SDVTList getVTList(EVT VT1, EVT VT2);
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SDVTList getVTList(EVT VT1, EVT VT2, EVT VT3);
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SDVTList getVTList(EVT VT1, EVT VT2, EVT VT3, EVT VT4);
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SDVTList getVTList(ArrayRef<EVT> VTs);
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//===--------------------------------------------------------------------===//
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// Node creation methods.
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//
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SDValue getConstant(uint64_t Val, SDLoc DL, EVT VT, bool isTarget = false,
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bool isOpaque = false);
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SDValue getConstant(const APInt &Val, SDLoc DL, EVT VT, bool isTarget = false,
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bool isOpaque = false);
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SDValue getConstant(const ConstantInt &Val, SDLoc DL, EVT VT,
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bool isTarget = false, bool isOpaque = false);
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SDValue getIntPtrConstant(uint64_t Val, SDLoc DL, bool isTarget = false);
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SDValue getTargetConstant(uint64_t Val, SDLoc DL, EVT VT,
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bool isOpaque = false) {
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return getConstant(Val, DL, VT, true, isOpaque);
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}
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SDValue getTargetConstant(const APInt &Val, SDLoc DL, EVT VT,
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bool isOpaque = false) {
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return getConstant(Val, DL, VT, true, isOpaque);
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}
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SDValue getTargetConstant(const ConstantInt &Val, SDLoc DL, EVT VT,
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bool isOpaque = false) {
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return getConstant(Val, DL, VT, true, isOpaque);
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}
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// The forms below that take a double should only be used for simple
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// constants that can be exactly represented in VT. No checks are made.
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SDValue getConstantFP(double Val, SDLoc DL, EVT VT, bool isTarget = false);
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SDValue getConstantFP(const APFloat& Val, SDLoc DL, EVT VT,
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bool isTarget = false);
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SDValue getConstantFP(const ConstantFP &CF, SDLoc DL, EVT VT,
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bool isTarget = false);
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SDValue getTargetConstantFP(double Val, SDLoc DL, EVT VT) {
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return getConstantFP(Val, DL, VT, true);
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}
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SDValue getTargetConstantFP(const APFloat& Val, SDLoc DL, EVT VT) {
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return getConstantFP(Val, DL, VT, true);
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}
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SDValue getTargetConstantFP(const ConstantFP &Val, SDLoc DL, EVT VT) {
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return getConstantFP(Val, DL, VT, true);
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}
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SDValue getGlobalAddress(const GlobalValue *GV, SDLoc DL, EVT VT,
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int64_t offset = 0, bool isTargetGA = false,
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unsigned char TargetFlags = 0);
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SDValue getTargetGlobalAddress(const GlobalValue *GV, SDLoc DL, EVT VT,
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int64_t offset = 0,
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unsigned char TargetFlags = 0) {
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return getGlobalAddress(GV, DL, VT, offset, true, TargetFlags);
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}
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SDValue getFrameIndex(int FI, EVT VT, bool isTarget = false);
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SDValue getTargetFrameIndex(int FI, EVT VT) {
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return getFrameIndex(FI, VT, true);
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}
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SDValue getJumpTable(int JTI, EVT VT, bool isTarget = false,
|
|
unsigned char TargetFlags = 0);
|
|
SDValue getTargetJumpTable(int JTI, EVT VT, unsigned char TargetFlags = 0) {
|
|
return getJumpTable(JTI, VT, true, TargetFlags);
|
|
}
|
|
SDValue getConstantPool(const Constant *C, EVT VT,
|
|
unsigned Align = 0, int Offs = 0, bool isT=false,
|
|
unsigned char TargetFlags = 0);
|
|
SDValue getTargetConstantPool(const Constant *C, EVT VT,
|
|
unsigned Align = 0, int Offset = 0,
|
|
unsigned char TargetFlags = 0) {
|
|
return getConstantPool(C, VT, Align, Offset, true, TargetFlags);
|
|
}
|
|
SDValue getConstantPool(MachineConstantPoolValue *C, EVT VT,
|
|
unsigned Align = 0, int Offs = 0, bool isT=false,
|
|
unsigned char TargetFlags = 0);
|
|
SDValue getTargetConstantPool(MachineConstantPoolValue *C,
|
|
EVT VT, unsigned Align = 0,
|
|
int Offset = 0, unsigned char TargetFlags=0) {
|
|
return getConstantPool(C, VT, Align, Offset, true, TargetFlags);
|
|
}
|
|
SDValue getTargetIndex(int Index, EVT VT, int64_t Offset = 0,
|
|
unsigned char TargetFlags = 0);
|
|
// When generating a branch to a BB, we don't in general know enough
|
|
// to provide debug info for the BB at that time, so keep this one around.
|
|
SDValue getBasicBlock(MachineBasicBlock *MBB);
|
|
SDValue getBasicBlock(MachineBasicBlock *MBB, SDLoc dl);
|
|
SDValue getExternalSymbol(const char *Sym, EVT VT);
|
|
SDValue getExternalSymbol(const char *Sym, SDLoc dl, EVT VT);
|
|
SDValue getTargetExternalSymbol(const char *Sym, EVT VT,
|
|
unsigned char TargetFlags = 0);
|
|
SDValue getMCSymbol(MCSymbol *Sym, EVT VT);
|
|
|
|
SDValue getValueType(EVT);
|
|
SDValue getRegister(unsigned Reg, EVT VT);
|
|
SDValue getRegisterMask(const uint32_t *RegMask);
|
|
SDValue getEHLabel(SDLoc dl, SDValue Root, MCSymbol *Label);
|
|
SDValue getBlockAddress(const BlockAddress *BA, EVT VT,
|
|
int64_t Offset = 0, bool isTarget = false,
|
|
unsigned char TargetFlags = 0);
|
|
SDValue getTargetBlockAddress(const BlockAddress *BA, EVT VT,
|
|
int64_t Offset = 0,
|
|
unsigned char TargetFlags = 0) {
|
|
return getBlockAddress(BA, VT, Offset, true, TargetFlags);
|
|
}
|
|
|
|
SDValue getCopyToReg(SDValue Chain, SDLoc dl, unsigned Reg, SDValue N) {
|
|
return getNode(ISD::CopyToReg, dl, MVT::Other, Chain,
|
|
getRegister(Reg, N.getValueType()), N);
|
|
}
|
|
|
|
// This version of the getCopyToReg method takes an extra operand, which
|
|
// indicates that there is potentially an incoming glue value (if Glue is not
|
|
// null) and that there should be a glue result.
|
|
SDValue getCopyToReg(SDValue Chain, SDLoc dl, unsigned Reg, SDValue N,
|
|
SDValue Glue) {
|
|
SDVTList VTs = getVTList(MVT::Other, MVT::Glue);
|
|
SDValue Ops[] = { Chain, getRegister(Reg, N.getValueType()), N, Glue };
|
|
return getNode(ISD::CopyToReg, dl, VTs,
|
|
ArrayRef<SDValue>(Ops, Glue.getNode() ? 4 : 3));
|
|
}
|
|
|
|
// Similar to last getCopyToReg() except parameter Reg is a SDValue
|
|
SDValue getCopyToReg(SDValue Chain, SDLoc dl, SDValue Reg, SDValue N,
|
|
SDValue Glue) {
|
|
SDVTList VTs = getVTList(MVT::Other, MVT::Glue);
|
|
SDValue Ops[] = { Chain, Reg, N, Glue };
|
|
return getNode(ISD::CopyToReg, dl, VTs,
|
|
ArrayRef<SDValue>(Ops, Glue.getNode() ? 4 : 3));
|
|
}
|
|
|
|
SDValue getCopyFromReg(SDValue Chain, SDLoc dl, unsigned Reg, EVT VT) {
|
|
SDVTList VTs = getVTList(VT, MVT::Other);
|
|
SDValue Ops[] = { Chain, getRegister(Reg, VT) };
|
|
return getNode(ISD::CopyFromReg, dl, VTs, Ops);
|
|
}
|
|
|
|
// This version of the getCopyFromReg method takes an extra operand, which
|
|
// indicates that there is potentially an incoming glue value (if Glue is not
|
|
// null) and that there should be a glue result.
|
|
SDValue getCopyFromReg(SDValue Chain, SDLoc dl, unsigned Reg, EVT VT,
|
|
SDValue Glue) {
|
|
SDVTList VTs = getVTList(VT, MVT::Other, MVT::Glue);
|
|
SDValue Ops[] = { Chain, getRegister(Reg, VT), Glue };
|
|
return getNode(ISD::CopyFromReg, dl, VTs,
|
|
ArrayRef<SDValue>(Ops, Glue.getNode() ? 3 : 2));
|
|
}
|
|
|
|
SDValue getCondCode(ISD::CondCode Cond);
|
|
|
|
/// Returns the ConvertRndSat Note: Avoid using this node because it may
|
|
/// disappear in the future and most targets don't support it.
|
|
SDValue getConvertRndSat(EVT VT, SDLoc dl, SDValue Val, SDValue DTy,
|
|
SDValue STy,
|
|
SDValue Rnd, SDValue Sat, ISD::CvtCode Code);
|
|
|
|
/// Return an ISD::VECTOR_SHUFFLE node. The number of elements in VT,
|
|
/// which must be a vector type, must match the number of mask elements
|
|
/// NumElts. An integer mask element equal to -1 is treated as undefined.
|
|
SDValue getVectorShuffle(EVT VT, SDLoc dl, SDValue N1, SDValue N2,
|
|
const int *MaskElts);
|
|
SDValue getVectorShuffle(EVT VT, SDLoc dl, SDValue N1, SDValue N2,
|
|
ArrayRef<int> MaskElts) {
|
|
assert(VT.getVectorNumElements() == MaskElts.size() &&
|
|
"Must have the same number of vector elements as mask elements!");
|
|
return getVectorShuffle(VT, dl, N1, N2, MaskElts.data());
|
|
}
|
|
|
|
/// \brief Returns an ISD::VECTOR_SHUFFLE node semantically equivalent to
|
|
/// the shuffle node in input but with swapped operands.
|
|
///
|
|
/// Example: shuffle A, B, <0,5,2,7> -> shuffle B, A, <4,1,6,3>
|
|
SDValue getCommutedVectorShuffle(const ShuffleVectorSDNode &SV);
|
|
|
|
/// Convert Op, which must be of integer type, to the
|
|
/// integer type VT, by either any-extending or truncating it.
|
|
SDValue getAnyExtOrTrunc(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Convert Op, which must be of integer type, to the
|
|
/// integer type VT, by either sign-extending or truncating it.
|
|
SDValue getSExtOrTrunc(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Convert Op, which must be of integer type, to the
|
|
/// integer type VT, by either zero-extending or truncating it.
|
|
SDValue getZExtOrTrunc(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Return the expression required to zero extend the Op
|
|
/// value assuming it was the smaller SrcTy value.
|
|
SDValue getZeroExtendInReg(SDValue Op, SDLoc DL, EVT SrcTy);
|
|
|
|
/// Return an operation which will any-extend the low lanes of the operand
|
|
/// into the specified vector type. For example,
|
|
/// this can convert a v16i8 into a v4i32 by any-extending the low four
|
|
/// lanes of the operand from i8 to i32.
|
|
SDValue getAnyExtendVectorInReg(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Return an operation which will sign extend the low lanes of the operand
|
|
/// into the specified vector type. For example,
|
|
/// this can convert a v16i8 into a v4i32 by sign extending the low four
|
|
/// lanes of the operand from i8 to i32.
|
|
SDValue getSignExtendVectorInReg(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Return an operation which will zero extend the low lanes of the operand
|
|
/// into the specified vector type. For example,
|
|
/// this can convert a v16i8 into a v4i32 by zero extending the low four
|
|
/// lanes of the operand from i8 to i32.
|
|
SDValue getZeroExtendVectorInReg(SDValue Op, SDLoc DL, EVT VT);
|
|
|
|
/// Convert Op, which must be of integer type, to the integer type VT,
|
|
/// by using an extension appropriate for the target's
|
|
/// BooleanContent for type OpVT or truncating it.
|
|
SDValue getBoolExtOrTrunc(SDValue Op, SDLoc SL, EVT VT, EVT OpVT);
|
|
|
|
/// Create a bitwise NOT operation as (XOR Val, -1).
|
|
SDValue getNOT(SDLoc DL, SDValue Val, EVT VT);
|
|
|
|
/// \brief Create a logical NOT operation as (XOR Val, BooleanOne).
|
|
SDValue getLogicalNOT(SDLoc DL, SDValue Val, EVT VT);
|
|
|
|
/// Return a new CALLSEQ_START node, which always must have a glue result
|
|
/// (to ensure it's not CSE'd). CALLSEQ_START does not have a useful SDLoc.
|
|
SDValue getCALLSEQ_START(SDValue Chain, SDValue Op, SDLoc DL) {
|
|
SDVTList VTs = getVTList(MVT::Other, MVT::Glue);
|
|
SDValue Ops[] = { Chain, Op };
|
|
return getNode(ISD::CALLSEQ_START, DL, VTs, Ops);
|
|
}
|
|
|
|
/// Return a new CALLSEQ_END node, which always must have a
|
|
/// glue result (to ensure it's not CSE'd).
|
|
/// CALLSEQ_END does not have a useful SDLoc.
|
|
SDValue getCALLSEQ_END(SDValue Chain, SDValue Op1, SDValue Op2,
|
|
SDValue InGlue, SDLoc DL) {
|
|
SDVTList NodeTys = getVTList(MVT::Other, MVT::Glue);
|
|
SmallVector<SDValue, 4> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Op1);
|
|
Ops.push_back(Op2);
|
|
if (InGlue.getNode())
|
|
Ops.push_back(InGlue);
|
|
return getNode(ISD::CALLSEQ_END, DL, NodeTys, Ops);
|
|
}
|
|
|
|
/// Return an UNDEF node. UNDEF does not have a useful SDLoc.
|
|
SDValue getUNDEF(EVT VT) {
|
|
return getNode(ISD::UNDEF, SDLoc(), VT);
|
|
}
|
|
|
|
/// Return a GLOBAL_OFFSET_TABLE node. This does not have a useful SDLoc.
|
|
SDValue getGLOBAL_OFFSET_TABLE(EVT VT) {
|
|
return getNode(ISD::GLOBAL_OFFSET_TABLE, SDLoc(), VT);
|
|
}
|
|
|
|
/// Gets or creates the specified node.
|
|
///
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT,
|
|
ArrayRef<SDUse> Ops);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT,
|
|
ArrayRef<SDValue> Ops);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, ArrayRef<EVT> ResultTys,
|
|
ArrayRef<SDValue> Ops);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs,
|
|
ArrayRef<SDValue> Ops);
|
|
|
|
// Specialize based on number of operands.
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT, SDValue N);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT, SDValue N1, SDValue N2,
|
|
const SDNodeFlags *Flags = nullptr);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT, SDValue N1, SDValue N2,
|
|
SDValue N3);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT, SDValue N1, SDValue N2,
|
|
SDValue N3, SDValue N4);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, EVT VT, SDValue N1, SDValue N2,
|
|
SDValue N3, SDValue N4, SDValue N5);
|
|
|
|
// Specialize again based on number of operands for nodes with a VTList
|
|
// rather than a single VT.
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs, SDValue N);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs, SDValue N1,
|
|
SDValue N2);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs, SDValue N1,
|
|
SDValue N2, SDValue N3);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs, SDValue N1,
|
|
SDValue N2, SDValue N3, SDValue N4);
|
|
SDValue getNode(unsigned Opcode, SDLoc DL, SDVTList VTs, SDValue N1,
|
|
SDValue N2, SDValue N3, SDValue N4, SDValue N5);
|
|
|
|
/// Compute a TokenFactor to force all the incoming stack arguments to be
|
|
/// loaded from the stack. This is used in tail call lowering to protect
|
|
/// stack arguments from being clobbered.
|
|
SDValue getStackArgumentTokenFactor(SDValue Chain);
|
|
|
|
SDValue getMemcpy(SDValue Chain, SDLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol, bool AlwaysInline,
|
|
bool isTailCall, MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo);
|
|
|
|
SDValue getMemmove(SDValue Chain, SDLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol, bool isTailCall,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo);
|
|
|
|
SDValue getMemset(SDValue Chain, SDLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol, bool isTailCall,
|
|
MachinePointerInfo DstPtrInfo);
|
|
|
|
/// Helper function to make it easier to build SetCC's if you just
|
|
/// have an ISD::CondCode instead of an SDValue.
|
|
///
|
|
SDValue getSetCC(SDLoc DL, EVT VT, SDValue LHS, SDValue RHS,
|
|
ISD::CondCode Cond) {
|
|
assert(LHS.getValueType().isVector() == RHS.getValueType().isVector() &&
|
|
"Cannot compare scalars to vectors");
|
|
assert(LHS.getValueType().isVector() == VT.isVector() &&
|
|
"Cannot compare scalars to vectors");
|
|
assert(Cond != ISD::SETCC_INVALID &&
|
|
"Cannot create a setCC of an invalid node.");
|
|
return getNode(ISD::SETCC, DL, VT, LHS, RHS, getCondCode(Cond));
|
|
}
|
|
|
|
/// Helper function to make it easier to build Select's if you just
|
|
/// have operands and don't want to check for vector.
|
|
SDValue getSelect(SDLoc DL, EVT VT, SDValue Cond,
|
|
SDValue LHS, SDValue RHS) {
|
|
assert(LHS.getValueType() == RHS.getValueType() &&
|
|
"Cannot use select on differing types");
|
|
assert(VT.isVector() == LHS.getValueType().isVector() &&
|
|
"Cannot mix vectors and scalars");
|
|
return getNode(Cond.getValueType().isVector() ? ISD::VSELECT : ISD::SELECT, DL, VT,
|
|
Cond, LHS, RHS);
|
|
}
|
|
|
|
/// Helper function to make it easier to build SelectCC's if you
|
|
/// just have an ISD::CondCode instead of an SDValue.
|
|
///
|
|
SDValue getSelectCC(SDLoc DL, SDValue LHS, SDValue RHS,
|
|
SDValue True, SDValue False, ISD::CondCode Cond) {
|
|
return getNode(ISD::SELECT_CC, DL, True.getValueType(),
|
|
LHS, RHS, True, False, getCondCode(Cond));
|
|
}
|
|
|
|
/// VAArg produces a result and token chain, and takes a pointer
|
|
/// and a source value as input.
|
|
SDValue getVAArg(EVT VT, SDLoc dl, SDValue Chain, SDValue Ptr,
|
|
SDValue SV, unsigned Align);
|
|
|
|
/// Gets a node for an atomic cmpxchg op. There are two
|
|
/// valid Opcodes. ISD::ATOMIC_CMO_SWAP produces the value loaded and a
|
|
/// chain result. ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS produces the value loaded,
|
|
/// a success flag (initially i1), and a chain.
|
|
SDValue getAtomicCmpSwap(unsigned Opcode, SDLoc dl, EVT MemVT, SDVTList VTs,
|
|
SDValue Chain, SDValue Ptr, SDValue Cmp, SDValue Swp,
|
|
MachinePointerInfo PtrInfo, unsigned Alignment,
|
|
AtomicOrdering SuccessOrdering,
|
|
AtomicOrdering FailureOrdering,
|
|
SynchronizationScope SynchScope);
|
|
SDValue getAtomicCmpSwap(unsigned Opcode, SDLoc dl, EVT MemVT, SDVTList VTs,
|
|
SDValue Chain, SDValue Ptr, SDValue Cmp, SDValue Swp,
|
|
MachineMemOperand *MMO,
|
|
AtomicOrdering SuccessOrdering,
|
|
AtomicOrdering FailureOrdering,
|
|
SynchronizationScope SynchScope);
|
|
|
|
/// Gets a node for an atomic op, produces result (if relevant)
|
|
/// and chain and takes 2 operands.
|
|
SDValue getAtomic(unsigned Opcode, SDLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Val, const Value *PtrVal,
|
|
unsigned Alignment, AtomicOrdering Ordering,
|
|
SynchronizationScope SynchScope);
|
|
SDValue getAtomic(unsigned Opcode, SDLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Val, MachineMemOperand *MMO,
|
|
AtomicOrdering Ordering,
|
|
SynchronizationScope SynchScope);
|
|
|
|
/// Gets a node for an atomic op, produces result and chain and
|
|
/// takes 1 operand.
|
|
SDValue getAtomic(unsigned Opcode, SDLoc dl, EVT MemVT, EVT VT,
|
|
SDValue Chain, SDValue Ptr, MachineMemOperand *MMO,
|
|
AtomicOrdering Ordering,
|
|
SynchronizationScope SynchScope);
|
|
|
|
/// Gets a node for an atomic op, produces result and chain and takes N
|
|
/// operands.
|
|
SDValue getAtomic(unsigned Opcode, SDLoc dl, EVT MemVT, SDVTList VTList,
|
|
ArrayRef<SDValue> Ops, MachineMemOperand *MMO,
|
|
AtomicOrdering SuccessOrdering,
|
|
AtomicOrdering FailureOrdering,
|
|
SynchronizationScope SynchScope);
|
|
SDValue getAtomic(unsigned Opcode, SDLoc dl, EVT MemVT, SDVTList VTList,
|
|
ArrayRef<SDValue> Ops, MachineMemOperand *MMO,
|
|
AtomicOrdering Ordering, SynchronizationScope SynchScope);
|
|
|
|
/// Creates a MemIntrinsicNode that may produce a
|
|
/// result and takes a list of operands. Opcode may be INTRINSIC_VOID,
|
|
/// INTRINSIC_W_CHAIN, or a target-specific opcode with a value not
|
|
/// less than FIRST_TARGET_MEMORY_OPCODE.
|
|
SDValue getMemIntrinsicNode(unsigned Opcode, SDLoc dl, SDVTList VTList,
|
|
ArrayRef<SDValue> Ops,
|
|
EVT MemVT, MachinePointerInfo PtrInfo,
|
|
unsigned Align = 0, bool Vol = false,
|
|
bool ReadMem = true, bool WriteMem = true,
|
|
unsigned Size = 0);
|
|
|
|
SDValue getMemIntrinsicNode(unsigned Opcode, SDLoc dl, SDVTList VTList,
|
|
ArrayRef<SDValue> Ops,
|
|
EVT MemVT, MachineMemOperand *MMO);
|
|
|
|
/// Create a MERGE_VALUES node from the given operands.
|
|
SDValue getMergeValues(ArrayRef<SDValue> Ops, SDLoc dl);
|
|
|
|
/// Loads are not normal binary operators: their result type is not
|
|
/// determined by their operands, and they produce a value AND a token chain.
|
|
///
|
|
SDValue getLoad(EVT VT, SDLoc dl, SDValue Chain, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, bool isVolatile,
|
|
bool isNonTemporal, bool isInvariant, unsigned Alignment,
|
|
const AAMDNodes &AAInfo = AAMDNodes(),
|
|
const MDNode *Ranges = nullptr);
|
|
SDValue getLoad(EVT VT, SDLoc dl, SDValue Chain, SDValue Ptr,
|
|
MachineMemOperand *MMO);
|
|
SDValue getExtLoad(ISD::LoadExtType ExtType, SDLoc dl, EVT VT,
|
|
SDValue Chain, SDValue Ptr, MachinePointerInfo PtrInfo,
|
|
EVT MemVT, bool isVolatile,
|
|
bool isNonTemporal, bool isInvariant, unsigned Alignment,
|
|
const AAMDNodes &AAInfo = AAMDNodes());
|
|
SDValue getExtLoad(ISD::LoadExtType ExtType, SDLoc dl, EVT VT,
|
|
SDValue Chain, SDValue Ptr, EVT MemVT,
|
|
MachineMemOperand *MMO);
|
|
SDValue getIndexedLoad(SDValue OrigLoad, SDLoc dl, SDValue Base,
|
|
SDValue Offset, ISD::MemIndexedMode AM);
|
|
SDValue getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
|
|
EVT VT, SDLoc dl,
|
|
SDValue Chain, SDValue Ptr, SDValue Offset,
|
|
MachinePointerInfo PtrInfo, EVT MemVT,
|
|
bool isVolatile, bool isNonTemporal, bool isInvariant,
|
|
unsigned Alignment, const AAMDNodes &AAInfo = AAMDNodes(),
|
|
const MDNode *Ranges = nullptr);
|
|
SDValue getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
|
|
EVT VT, SDLoc dl,
|
|
SDValue Chain, SDValue Ptr, SDValue Offset,
|
|
EVT MemVT, MachineMemOperand *MMO);
|
|
|
|
/// Helper function to build ISD::STORE nodes.
|
|
SDValue getStore(SDValue Chain, SDLoc dl, SDValue Val, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, bool isVolatile,
|
|
bool isNonTemporal, unsigned Alignment,
|
|
const AAMDNodes &AAInfo = AAMDNodes());
|
|
SDValue getStore(SDValue Chain, SDLoc dl, SDValue Val, SDValue Ptr,
|
|
MachineMemOperand *MMO);
|
|
SDValue getTruncStore(SDValue Chain, SDLoc dl, SDValue Val, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, EVT TVT,
|
|
bool isNonTemporal, bool isVolatile,
|
|
unsigned Alignment,
|
|
const AAMDNodes &AAInfo = AAMDNodes());
|
|
SDValue getTruncStore(SDValue Chain, SDLoc dl, SDValue Val, SDValue Ptr,
|
|
EVT TVT, MachineMemOperand *MMO);
|
|
SDValue getIndexedStore(SDValue OrigStoe, SDLoc dl, SDValue Base,
|
|
SDValue Offset, ISD::MemIndexedMode AM);
|
|
|
|
SDValue getMaskedLoad(EVT VT, SDLoc dl, SDValue Chain, SDValue Ptr,
|
|
SDValue Mask, SDValue Src0, EVT MemVT,
|
|
MachineMemOperand *MMO, ISD::LoadExtType);
|
|
SDValue getMaskedStore(SDValue Chain, SDLoc dl, SDValue Val,
|
|
SDValue Ptr, SDValue Mask, EVT MemVT,
|
|
MachineMemOperand *MMO, bool IsTrunc);
|
|
SDValue getMaskedGather(SDVTList VTs, EVT VT, SDLoc dl,
|
|
ArrayRef<SDValue> Ops, MachineMemOperand *MMO);
|
|
SDValue getMaskedScatter(SDVTList VTs, EVT VT, SDLoc dl,
|
|
ArrayRef<SDValue> Ops, MachineMemOperand *MMO);
|
|
/// Construct a node to track a Value* through the backend.
|
|
SDValue getSrcValue(const Value *v);
|
|
|
|
/// Return an MDNodeSDNode which holds an MDNode.
|
|
SDValue getMDNode(const MDNode *MD);
|
|
|
|
/// Return a bitcast using the SDLoc of the value operand, and casting to the
|
|
/// provided type. Use getNode to set a custom SDLoc.
|
|
SDValue getBitcast(EVT VT, SDValue V);
|
|
|
|
/// Return an AddrSpaceCastSDNode.
|
|
SDValue getAddrSpaceCast(SDLoc dl, EVT VT, SDValue Ptr,
|
|
unsigned SrcAS, unsigned DestAS);
|
|
|
|
/// Return the specified value casted to
|
|
/// the target's desired shift amount type.
|
|
SDValue getShiftAmountOperand(EVT LHSTy, SDValue Op);
|
|
|
|
/// *Mutate* the specified node in-place to have the
|
|
/// specified operands. If the resultant node already exists in the DAG,
|
|
/// this does not modify the specified node, instead it returns the node that
|
|
/// already exists. If the resultant node does not exist in the DAG, the
|
|
/// input node is returned. As a degenerate case, if you specify the same
|
|
/// input operands as the node already has, the input node is returned.
|
|
SDNode *UpdateNodeOperands(SDNode *N, SDValue Op);
|
|
SDNode *UpdateNodeOperands(SDNode *N, SDValue Op1, SDValue Op2);
|
|
SDNode *UpdateNodeOperands(SDNode *N, SDValue Op1, SDValue Op2,
|
|
SDValue Op3);
|
|
SDNode *UpdateNodeOperands(SDNode *N, SDValue Op1, SDValue Op2,
|
|
SDValue Op3, SDValue Op4);
|
|
SDNode *UpdateNodeOperands(SDNode *N, SDValue Op1, SDValue Op2,
|
|
SDValue Op3, SDValue Op4, SDValue Op5);
|
|
SDNode *UpdateNodeOperands(SDNode *N, ArrayRef<SDValue> Ops);
|
|
|
|
/// These are used for target selectors to *mutate* the
|
|
/// specified node to have the specified return type, Target opcode, and
|
|
/// operands. Note that target opcodes are stored as
|
|
/// ~TargetOpcode in the node opcode field. The resultant node is returned.
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT, SDValue Op1);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT,
|
|
SDValue Op1, SDValue Op2);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT,
|
|
SDValue Op1, SDValue Op2, SDValue Op3);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT,
|
|
ArrayRef<SDValue> Ops);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1, EVT VT2);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, ArrayRef<SDValue> Ops);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, EVT VT3, ArrayRef<SDValue> Ops);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned MachineOpc, EVT VT1,
|
|
EVT VT2, EVT VT3, EVT VT4, ArrayRef<SDValue> Ops);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, SDValue Op1);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, SDValue Op1, SDValue Op2);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, SDValue Op1, SDValue Op2, SDValue Op3);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, EVT VT3, SDValue Op1, SDValue Op2, SDValue Op3);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, SDVTList VTs,
|
|
ArrayRef<SDValue> Ops);
|
|
|
|
/// This *mutates* the specified node to have the specified
|
|
/// return type, opcode, and operands.
|
|
SDNode *MorphNodeTo(SDNode *N, unsigned Opc, SDVTList VTs,
|
|
ArrayRef<SDValue> Ops);
|
|
|
|
/// These are used for target selectors to create a new node
|
|
/// with specified return type(s), MachineInstr opcode, and operands.
|
|
///
|
|
/// Note that getMachineNode returns the resultant node. If there is already
|
|
/// a node of the specified opcode and operands, it returns that node instead
|
|
/// of the current one.
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT,
|
|
SDValue Op1);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT,
|
|
SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT,
|
|
SDValue Op1, SDValue Op2, SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT,
|
|
ArrayRef<SDValue> Ops);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
SDValue Op1);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
SDValue Op1, SDValue Op2, SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
ArrayRef<SDValue> Ops);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, SDValue Op1, SDValue Op2,
|
|
SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, ArrayRef<SDValue> Ops);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, EVT VT4, ArrayRef<SDValue> Ops);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl,
|
|
ArrayRef<EVT> ResultTys,
|
|
ArrayRef<SDValue> Ops);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, SDLoc dl, SDVTList VTs,
|
|
ArrayRef<SDValue> Ops);
|
|
|
|
/// A convenience function for creating TargetInstrInfo::EXTRACT_SUBREG nodes.
|
|
SDValue getTargetExtractSubreg(int SRIdx, SDLoc DL, EVT VT,
|
|
SDValue Operand);
|
|
|
|
/// A convenience function for creating TargetInstrInfo::INSERT_SUBREG nodes.
|
|
SDValue getTargetInsertSubreg(int SRIdx, SDLoc DL, EVT VT,
|
|
SDValue Operand, SDValue Subreg);
|
|
|
|
/// Get the specified node if it's already available, or else return NULL.
|
|
SDNode *getNodeIfExists(unsigned Opcode, SDVTList VTs, ArrayRef<SDValue> Ops,
|
|
const SDNodeFlags *Flags = nullptr);
|
|
|
|
/// Creates a SDDbgValue node.
|
|
SDDbgValue *getDbgValue(MDNode *Var, MDNode *Expr, SDNode *N, unsigned R,
|
|
bool IsIndirect, uint64_t Off, DebugLoc DL,
|
|
unsigned O);
|
|
|
|
/// Constant
|
|
SDDbgValue *getConstantDbgValue(MDNode *Var, MDNode *Expr, const Value *C,
|
|
uint64_t Off, DebugLoc DL, unsigned O);
|
|
|
|
/// FrameIndex
|
|
SDDbgValue *getFrameIndexDbgValue(MDNode *Var, MDNode *Expr, unsigned FI,
|
|
uint64_t Off, DebugLoc DL, unsigned O);
|
|
|
|
/// Remove the specified node from the system. If any of its
|
|
/// operands then becomes dead, remove them as well. Inform UpdateListener
|
|
/// for each node deleted.
|
|
void RemoveDeadNode(SDNode *N);
|
|
|
|
/// This method deletes the unreachable nodes in the
|
|
/// given list, and any nodes that become unreachable as a result.
|
|
void RemoveDeadNodes(SmallVectorImpl<SDNode *> &DeadNodes);
|
|
|
|
/// Modify anything using 'From' to use 'To' instead.
|
|
/// This can cause recursive merging of nodes in the DAG. Use the first
|
|
/// version if 'From' is known to have a single result, use the second
|
|
/// if you have two nodes with identical results (or if 'To' has a superset
|
|
/// of the results of 'From'), use the third otherwise.
|
|
///
|
|
/// These methods all take an optional UpdateListener, which (if not null) is
|
|
/// informed about nodes that are deleted and modified due to recursive
|
|
/// changes in the dag.
|
|
///
|
|
/// These functions only replace all existing uses. It's possible that as
|
|
/// these replacements are being performed, CSE may cause the From node
|
|
/// to be given new uses. These new uses of From are left in place, and
|
|
/// not automatically transferred to To.
|
|
///
|
|
void ReplaceAllUsesWith(SDValue From, SDValue Op);
|
|
void ReplaceAllUsesWith(SDNode *From, SDNode *To);
|
|
void ReplaceAllUsesWith(SDNode *From, const SDValue *To);
|
|
|
|
/// Replace any uses of From with To, leaving
|
|
/// uses of other values produced by From.Val alone.
|
|
void ReplaceAllUsesOfValueWith(SDValue From, SDValue To);
|
|
|
|
/// Like ReplaceAllUsesOfValueWith, but for multiple values at once.
|
|
/// This correctly handles the case where
|
|
/// there is an overlap between the From values and the To values.
|
|
void ReplaceAllUsesOfValuesWith(const SDValue *From, const SDValue *To,
|
|
unsigned Num);
|
|
|
|
/// Topological-sort the AllNodes list and a
|
|
/// assign a unique node id for each node in the DAG based on their
|
|
/// topological order. Returns the number of nodes.
|
|
unsigned AssignTopologicalOrder();
|
|
|
|
/// Move node N in the AllNodes list to be immediately
|
|
/// before the given iterator Position. This may be used to update the
|
|
/// topological ordering when the list of nodes is modified.
|
|
void RepositionNode(allnodes_iterator Position, SDNode *N) {
|
|
AllNodes.insert(Position, AllNodes.remove(N));
|
|
}
|
|
|
|
/// Returns true if the opcode is a commutative binary operation.
|
|
static bool isCommutativeBinOp(unsigned Opcode) {
|
|
// FIXME: This should get its info from the td file, so that we can include
|
|
// target info.
|
|
switch (Opcode) {
|
|
case ISD::ADD:
|
|
case ISD::MUL:
|
|
case ISD::MULHU:
|
|
case ISD::MULHS:
|
|
case ISD::SMUL_LOHI:
|
|
case ISD::UMUL_LOHI:
|
|
case ISD::FADD:
|
|
case ISD::FMUL:
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR:
|
|
case ISD::SADDO:
|
|
case ISD::UADDO:
|
|
case ISD::ADDC:
|
|
case ISD::ADDE:
|
|
case ISD::FMINNUM:
|
|
case ISD::FMAXNUM:
|
|
return true;
|
|
default: return false;
|
|
}
|
|
}
|
|
|
|
/// Returns an APFloat semantics tag appropriate for the given type. If VT is
|
|
/// a vector type, the element semantics are returned.
|
|
static const fltSemantics &EVTToAPFloatSemantics(EVT VT) {
|
|
switch (VT.getScalarType().getSimpleVT().SimpleTy) {
|
|
default: llvm_unreachable("Unknown FP format");
|
|
case MVT::f16: return APFloat::IEEEhalf;
|
|
case MVT::f32: return APFloat::IEEEsingle;
|
|
case MVT::f64: return APFloat::IEEEdouble;
|
|
case MVT::f80: return APFloat::x87DoubleExtended;
|
|
case MVT::f128: return APFloat::IEEEquad;
|
|
case MVT::ppcf128: return APFloat::PPCDoubleDouble;
|
|
}
|
|
}
|
|
|
|
/// Add a dbg_value SDNode. If SD is non-null that means the
|
|
/// value is produced by SD.
|
|
void AddDbgValue(SDDbgValue *DB, SDNode *SD, bool isParameter);
|
|
|
|
/// Get the debug values which reference the given SDNode.
|
|
ArrayRef<SDDbgValue*> GetDbgValues(const SDNode* SD) {
|
|
return DbgInfo->getSDDbgValues(SD);
|
|
}
|
|
|
|
/// Transfer SDDbgValues.
|
|
void TransferDbgValues(SDValue From, SDValue To);
|
|
|
|
/// Return true if there are any SDDbgValue nodes associated
|
|
/// with this SelectionDAG.
|
|
bool hasDebugValues() const { return !DbgInfo->empty(); }
|
|
|
|
SDDbgInfo::DbgIterator DbgBegin() { return DbgInfo->DbgBegin(); }
|
|
SDDbgInfo::DbgIterator DbgEnd() { return DbgInfo->DbgEnd(); }
|
|
SDDbgInfo::DbgIterator ByvalParmDbgBegin() {
|
|
return DbgInfo->ByvalParmDbgBegin();
|
|
}
|
|
SDDbgInfo::DbgIterator ByvalParmDbgEnd() {
|
|
return DbgInfo->ByvalParmDbgEnd();
|
|
}
|
|
|
|
void dump() const;
|
|
|
|
/// Create a stack temporary, suitable for holding the
|
|
/// specified value type. If minAlign is specified, the slot size will have
|
|
/// at least that alignment.
|
|
SDValue CreateStackTemporary(EVT VT, unsigned minAlign = 1);
|
|
|
|
/// Create a stack temporary suitable for holding
|
|
/// either of the specified value types.
|
|
SDValue CreateStackTemporary(EVT VT1, EVT VT2);
|
|
|
|
SDValue FoldConstantArithmetic(unsigned Opcode, SDLoc DL, EVT VT,
|
|
SDNode *Cst1, SDNode *Cst2);
|
|
|
|
SDValue FoldConstantArithmetic(unsigned Opcode, SDLoc DL, EVT VT,
|
|
const ConstantSDNode *Cst1,
|
|
const ConstantSDNode *Cst2);
|
|
|
|
/// Constant fold a setcc to true or false.
|
|
SDValue FoldSetCC(EVT VT, SDValue N1,
|
|
SDValue N2, ISD::CondCode Cond, SDLoc dl);
|
|
|
|
/// Return true if the sign bit of Op is known to be zero.
|
|
/// We use this predicate to simplify operations downstream.
|
|
bool SignBitIsZero(SDValue Op, unsigned Depth = 0) const;
|
|
|
|
/// Return true if 'Op & Mask' is known to be zero. We
|
|
/// use this predicate to simplify operations downstream. Op and Mask are
|
|
/// known to be the same type.
|
|
bool MaskedValueIsZero(SDValue Op, const APInt &Mask, unsigned Depth = 0)
|
|
const;
|
|
|
|
/// Determine which bits of Op are known to be either zero or one and return
|
|
/// them in the KnownZero/KnownOne bitsets. Targets can implement the
|
|
/// computeKnownBitsForTargetNode method in the TargetLowering class to allow
|
|
/// target nodes to be understood.
|
|
void computeKnownBits(SDValue Op, APInt &KnownZero, APInt &KnownOne,
|
|
unsigned Depth = 0) const;
|
|
|
|
/// Return the number of times the sign bit of the
|
|
/// register is replicated into the other bits. We know that at least 1 bit
|
|
/// is always equal to the sign bit (itself), but other cases can give us
|
|
/// information. For example, immediately after an "SRA X, 2", we know that
|
|
/// the top 3 bits are all equal to each other, so we return 3. Targets can
|
|
/// implement the ComputeNumSignBitsForTarget method in the TargetLowering
|
|
/// class to allow target nodes to be understood.
|
|
unsigned ComputeNumSignBits(SDValue Op, unsigned Depth = 0) const;
|
|
|
|
/// Return true if the specified operand is an
|
|
/// ISD::ADD with a ConstantSDNode on the right-hand side, or if it is an
|
|
/// ISD::OR with a ConstantSDNode that is guaranteed to have the same
|
|
/// semantics as an ADD. This handles the equivalence:
|
|
/// X|Cst == X+Cst iff X&Cst = 0.
|
|
bool isBaseWithConstantOffset(SDValue Op) const;
|
|
|
|
/// Test whether the given SDValue is known to never be NaN.
|
|
bool isKnownNeverNaN(SDValue Op) const;
|
|
|
|
/// Test whether the given SDValue is known to never be
|
|
/// positive or negative Zero.
|
|
bool isKnownNeverZero(SDValue Op) const;
|
|
|
|
/// Test whether two SDValues are known to compare equal. This
|
|
/// is true if they are the same value, or if one is negative zero and the
|
|
/// other positive zero.
|
|
bool isEqualTo(SDValue A, SDValue B) const;
|
|
|
|
/// Utility function used by legalize and lowering to
|
|
/// "unroll" a vector operation by splitting out the scalars and operating
|
|
/// on each element individually. If the ResNE is 0, fully unroll the vector
|
|
/// op. If ResNE is less than the width of the vector op, unroll up to ResNE.
|
|
/// If the ResNE is greater than the width of the vector op, unroll the
|
|
/// vector op and fill the end of the resulting vector with UNDEFS.
|
|
SDValue UnrollVectorOp(SDNode *N, unsigned ResNE = 0);
|
|
|
|
/// Return true if LD is loading 'Bytes' bytes from a location that is 'Dist'
|
|
/// units away from the location that the 'Base' load is loading from.
|
|
bool isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base,
|
|
unsigned Bytes, int Dist) const;
|
|
|
|
/// Infer alignment of a load / store address. Return 0 if
|
|
/// it cannot be inferred.
|
|
unsigned InferPtrAlignment(SDValue Ptr) const;
|
|
|
|
/// Compute the VTs needed for the low/hi parts of a type
|
|
/// which is split (or expanded) into two not necessarily identical pieces.
|
|
std::pair<EVT, EVT> GetSplitDestVTs(const EVT &VT) const;
|
|
|
|
/// Split the vector with EXTRACT_SUBVECTOR using the provides
|
|
/// VTs and return the low/high part.
|
|
std::pair<SDValue, SDValue> SplitVector(const SDValue &N, const SDLoc &DL,
|
|
const EVT &LoVT, const EVT &HiVT);
|
|
|
|
/// Split the vector with EXTRACT_SUBVECTOR and return the low/high part.
|
|
std::pair<SDValue, SDValue> SplitVector(const SDValue &N, const SDLoc &DL) {
|
|
EVT LoVT, HiVT;
|
|
std::tie(LoVT, HiVT) = GetSplitDestVTs(N.getValueType());
|
|
return SplitVector(N, DL, LoVT, HiVT);
|
|
}
|
|
|
|
/// Split the node's operand with EXTRACT_SUBVECTOR and
|
|
/// return the low/high part.
|
|
std::pair<SDValue, SDValue> SplitVectorOperand(const SDNode *N, unsigned OpNo)
|
|
{
|
|
return SplitVector(N->getOperand(OpNo), SDLoc(N));
|
|
}
|
|
|
|
/// Append the extracted elements from Start to Count out of the vector Op
|
|
/// in Args. If Count is 0, all of the elements will be extracted.
|
|
void ExtractVectorElements(SDValue Op, SmallVectorImpl<SDValue> &Args,
|
|
unsigned Start = 0, unsigned Count = 0);
|
|
|
|
unsigned getEVTAlignment(EVT MemoryVT) const;
|
|
|
|
private:
|
|
void InsertNode(SDNode *N);
|
|
bool RemoveNodeFromCSEMaps(SDNode *N);
|
|
void AddModifiedNodeToCSEMaps(SDNode *N);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, SDValue Op, void *&InsertPos);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, SDValue Op1, SDValue Op2,
|
|
void *&InsertPos);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, ArrayRef<SDValue> Ops,
|
|
void *&InsertPos);
|
|
SDNode *UpdadeSDLocOnMergedSDNode(SDNode *N, SDLoc loc);
|
|
|
|
void DeleteNodeNotInCSEMaps(SDNode *N);
|
|
void DeallocateNode(SDNode *N);
|
|
|
|
void allnodes_clear();
|
|
|
|
BinarySDNode *GetBinarySDNode(unsigned Opcode, SDLoc DL, SDVTList VTs,
|
|
SDValue N1, SDValue N2,
|
|
const SDNodeFlags *Flags = nullptr);
|
|
|
|
/// Look up the node specified by ID in CSEMap. If it exists, return it. If
|
|
/// not, return the insertion token that will make insertion faster. This
|
|
/// overload is for nodes other than Constant or ConstantFP, use the other one
|
|
/// for those.
|
|
SDNode *FindNodeOrInsertPos(const FoldingSetNodeID &ID, void *&InsertPos);
|
|
|
|
/// Look up the node specified by ID in CSEMap. If it exists, return it. If
|
|
/// not, return the insertion token that will make insertion faster. Performs
|
|
/// additional processing for constant nodes.
|
|
SDNode *FindNodeOrInsertPos(const FoldingSetNodeID &ID, DebugLoc DL,
|
|
void *&InsertPos);
|
|
|
|
/// List of non-single value types.
|
|
FoldingSet<SDVTListNode> VTListMap;
|
|
|
|
/// Maps to auto-CSE operations.
|
|
std::vector<CondCodeSDNode*> CondCodeNodes;
|
|
|
|
std::vector<SDNode*> ValueTypeNodes;
|
|
std::map<EVT, SDNode*, EVT::compareRawBits> ExtendedValueTypeNodes;
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StringMap<SDNode*> ExternalSymbols;
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std::map<std::pair<std::string, unsigned char>,SDNode*> TargetExternalSymbols;
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DenseMap<MCSymbol *, SDNode *> MCSymbols;
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};
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template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
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typedef SelectionDAG::allnodes_iterator nodes_iterator;
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static nodes_iterator nodes_begin(SelectionDAG *G) {
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return G->allnodes_begin();
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}
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static nodes_iterator nodes_end(SelectionDAG *G) {
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return G->allnodes_end();
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}
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};
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} // end namespace llvm
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#endif
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