mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116890 91177308-0d34-0410-b5e6-96231b3b80d8
1045 lines
46 KiB
C++
1045 lines
46 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/ilist.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/StringMap.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 <vector>
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#include <map>
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#include <string>
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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 SDNodeOrdering;
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class SDDbgValue;
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class TargetLowering;
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class TargetSelectionDAGInfo;
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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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assert(0 && "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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/// SDDbgInfo - 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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SmallVector<SDDbgValue*, 32> DbgValues;
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SmallVector<SDDbgValue*, 32> ByvalParmDbgValues;
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DenseMap<const SDNode*, SmallVector<SDDbgValue*, 2> > DbgValMap;
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void operator=(const SDDbgInfo&); // Do not implement.
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SDDbgInfo(const SDDbgInfo&); // Do not implement.
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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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void clear() {
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DbgValMap.clear();
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DbgValues.clear();
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ByvalParmDbgValues.clear();
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}
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bool empty() const {
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return DbgValues.empty() && ByvalParmDbgValues.empty();
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}
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SmallVector<SDDbgValue*,2> &getSDDbgValues(const SDNode *Node) {
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return DbgValMap[Node];
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}
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typedef SmallVector<SDDbgValue*,32>::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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enum CombineLevel {
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Unrestricted, // Combine may create illegal operations and illegal types.
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NoIllegalTypes, // Combine may create illegal operations but no illegal types.
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NoIllegalOperations // Combine may only create legal operations and types.
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};
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class SelectionDAG;
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void checkForCycles(const SDNode *N);
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void checkForCycles(const SelectionDAG *DAG);
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/// SelectionDAG class - This is used to represent a portion of an LLVM function
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/// in a low-level Data Dependence DAG representation suitable for instruction
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/// selection. This DAG is constructed as the first step of instruction
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/// selection in order 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 TargetLowering &TLI;
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const TargetSelectionDAGInfo &TSI;
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MachineFunction *MF;
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LLVMContext *Context;
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/// EntryNode - The starting token.
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SDNode EntryNode;
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/// Root - The root of the entire DAG.
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SDValue Root;
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/// AllNodes - A linked list of nodes in the current DAG.
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ilist<SDNode> AllNodes;
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/// NodeAllocatorType - 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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/// NodeAllocator - Pool allocation for nodes.
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NodeAllocatorType NodeAllocator;
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/// CSEMap - 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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/// OperandAllocator - Pool allocation for machine-opcode SDNode operands.
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BumpPtrAllocator OperandAllocator;
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/// Allocator - Pool allocation for misc. objects that are created once per
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/// SelectionDAG.
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BumpPtrAllocator Allocator;
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/// SDNodeOrdering - The ordering of the SDNodes. It roughly corresponds to
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/// the ordering of the original LLVM instructions.
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SDNodeOrdering *Ordering;
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/// DbgInfo - Tracks dbg_value information through SDISel.
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SDDbgInfo *DbgInfo;
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/// VerifyNode - Sanity check the given node. Aborts if it is invalid.
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void VerifyNode(SDNode *N);
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/// setGraphColorHelper - Implementation of setSubgraphColor.
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/// Return whether we had to truncate the search.
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///
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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&); // Do not implement.
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SelectionDAG(const SelectionDAG&); // Do not implement.
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public:
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explicit SelectionDAG(const TargetMachine &TM);
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~SelectionDAG();
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/// init - Prepare this SelectionDAG to process code in the given
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/// MachineFunction.
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///
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void init(MachineFunction &mf);
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/// clear - Clear state and free memory necessary to make this
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/// SelectionDAG ready to process a new block.
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///
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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 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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/// viewGraph - Pop up a GraphViz/gv window with the DAG rendered using 'dot'.
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///
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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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/// clearGraphAttrs - 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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/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".)
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///
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void setGraphAttrs(const SDNode *N, const char *Attrs);
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/// getGraphAttrs - 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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/// setGraphColor - Convenience for setting node color attribute.
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///
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void setGraphColor(const SDNode *N, const char *Color);
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/// setGraphColor - Convenience for setting subgraph color attribute.
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///
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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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/// getRoot - Return the root tag of the SelectionDAG.
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///
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const SDValue &getRoot() const { return Root; }
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/// getEntryNode - Return the token chain corresponding to the entry of the
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/// 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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/// setRoot - 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());
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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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/// Combine - 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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/// LegalizeTypes - This transforms the SelectionDAG into a SelectionDAG that
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/// only uses types natively supported by the target. Returns "true" if it
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/// 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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/// Legalize - 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(CodeGenOpt::Level OptLevel);
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/// LegalizeVectors - 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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/// RemoveDeadNodes - This method deletes all unreachable nodes in the
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/// SelectionDAG.
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void RemoveDeadNodes();
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/// DeleteNode - 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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/// getVTList - Return an SDVTList that represents the list of values
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/// 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(const EVT *VTs, unsigned NumVTs);
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//===--------------------------------------------------------------------===//
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// Node creation methods.
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//
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SDValue getConstant(uint64_t Val, EVT VT, bool isTarget = false);
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SDValue getConstant(const APInt &Val, EVT VT, bool isTarget = false);
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SDValue getConstant(const ConstantInt &Val, EVT VT, bool isTarget = false);
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SDValue getIntPtrConstant(uint64_t Val, bool isTarget = false);
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SDValue getTargetConstant(uint64_t Val, EVT VT) {
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return getConstant(Val, VT, true);
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}
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SDValue getTargetConstant(const APInt &Val, EVT VT) {
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return getConstant(Val, VT, true);
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}
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SDValue getTargetConstant(const ConstantInt &Val, EVT VT) {
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return getConstant(Val, VT, true);
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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, EVT VT, bool isTarget = false);
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SDValue getConstantFP(const APFloat& Val, EVT VT, bool isTarget = false);
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SDValue getConstantFP(const ConstantFP &CF, EVT VT, bool isTarget = false);
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SDValue getTargetConstantFP(double Val, EVT VT) {
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return getConstantFP(Val, VT, true);
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}
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SDValue getTargetConstantFP(const APFloat& Val, EVT VT) {
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return getConstantFP(Val, VT, true);
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}
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SDValue getTargetConstantFP(const ConstantFP &Val, EVT VT) {
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return getConstantFP(Val, VT, true);
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}
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SDValue getGlobalAddress(const GlobalValue *GV, DebugLoc 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, DebugLoc 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,
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unsigned char TargetFlags = 0);
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SDValue getTargetJumpTable(int JTI, EVT VT, unsigned char TargetFlags = 0) {
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return getJumpTable(JTI, VT, true, TargetFlags);
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}
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SDValue getConstantPool(const Constant *C, EVT VT,
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unsigned Align = 0, int Offs = 0, bool isT=false,
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unsigned char TargetFlags = 0);
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SDValue getTargetConstantPool(const Constant *C, EVT VT,
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unsigned Align = 0, int Offset = 0,
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unsigned char TargetFlags = 0) {
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return getConstantPool(C, VT, Align, Offset, true, TargetFlags);
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}
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SDValue getConstantPool(MachineConstantPoolValue *C, EVT VT,
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unsigned Align = 0, int Offs = 0, bool isT=false,
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unsigned char TargetFlags = 0);
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SDValue getTargetConstantPool(MachineConstantPoolValue *C,
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EVT VT, unsigned Align = 0,
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int Offset = 0, unsigned char TargetFlags=0) {
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return getConstantPool(C, VT, Align, Offset, true, TargetFlags);
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}
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// When generating a branch to a BB, we don't in general know enough
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// to provide debug info for the BB at that time, so keep this one around.
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SDValue getBasicBlock(MachineBasicBlock *MBB);
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SDValue getBasicBlock(MachineBasicBlock *MBB, DebugLoc dl);
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SDValue getExternalSymbol(const char *Sym, EVT VT);
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SDValue getExternalSymbol(const char *Sym, DebugLoc dl, EVT VT);
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SDValue getTargetExternalSymbol(const char *Sym, EVT VT,
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unsigned char TargetFlags = 0);
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SDValue getValueType(EVT);
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SDValue getRegister(unsigned Reg, EVT VT);
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SDValue getEHLabel(DebugLoc dl, SDValue Root, MCSymbol *Label);
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SDValue getBlockAddress(const BlockAddress *BA, EVT VT,
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bool isTarget = false, unsigned char TargetFlags = 0);
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SDValue getCopyToReg(SDValue Chain, DebugLoc dl, unsigned Reg, SDValue N) {
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return getNode(ISD::CopyToReg, dl, MVT::Other, Chain,
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getRegister(Reg, N.getValueType()), N);
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}
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// This version of the getCopyToReg method takes an extra operand, which
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// indicates that there is potentially an incoming flag value (if Flag is not
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// null) and that there should be a flag result.
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SDValue getCopyToReg(SDValue Chain, DebugLoc dl, unsigned Reg, SDValue N,
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SDValue Flag) {
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SDVTList VTs = getVTList(MVT::Other, MVT::Flag);
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SDValue Ops[] = { Chain, getRegister(Reg, N.getValueType()), N, Flag };
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return getNode(ISD::CopyToReg, dl, VTs, Ops, Flag.getNode() ? 4 : 3);
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}
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// Similar to last getCopyToReg() except parameter Reg is a SDValue
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SDValue getCopyToReg(SDValue Chain, DebugLoc dl, SDValue Reg, SDValue N,
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SDValue Flag) {
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SDVTList VTs = getVTList(MVT::Other, MVT::Flag);
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SDValue Ops[] = { Chain, Reg, N, Flag };
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return getNode(ISD::CopyToReg, dl, VTs, Ops, Flag.getNode() ? 4 : 3);
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}
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SDValue getCopyFromReg(SDValue Chain, DebugLoc dl, unsigned Reg, EVT VT) {
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SDVTList VTs = getVTList(VT, MVT::Other);
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SDValue Ops[] = { Chain, getRegister(Reg, VT) };
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return getNode(ISD::CopyFromReg, dl, VTs, Ops, 2);
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}
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// This version of the getCopyFromReg method takes an extra operand, which
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// indicates that there is potentially an incoming flag value (if Flag is not
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// null) and that there should be a flag result.
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SDValue getCopyFromReg(SDValue Chain, DebugLoc dl, unsigned Reg, EVT VT,
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SDValue Flag) {
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SDVTList VTs = getVTList(VT, MVT::Other, MVT::Flag);
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SDValue Ops[] = { Chain, getRegister(Reg, VT), Flag };
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return getNode(ISD::CopyFromReg, dl, VTs, Ops, Flag.getNode() ? 3 : 2);
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}
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SDValue getCondCode(ISD::CondCode Cond);
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/// Returns the ConvertRndSat Note: Avoid using this node because it may
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/// disappear in the future and most targets don't support it.
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SDValue getConvertRndSat(EVT VT, DebugLoc dl, SDValue Val, SDValue DTy,
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SDValue STy,
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SDValue Rnd, SDValue Sat, ISD::CvtCode Code);
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/// getVectorShuffle - Return an ISD::VECTOR_SHUFFLE node. The number of
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/// elements in VT, which must be a vector type, must match the number of
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/// mask elements NumElts. A integer mask element equal to -1 is treated as
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/// undefined.
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SDValue getVectorShuffle(EVT VT, DebugLoc dl, SDValue N1, SDValue N2,
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const int *MaskElts);
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/// getSExtOrTrunc - Convert Op, which must be of integer type, to the
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/// integer type VT, by either sign-extending or truncating it.
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SDValue getSExtOrTrunc(SDValue Op, DebugLoc DL, EVT VT);
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/// getZExtOrTrunc - Convert Op, which must be of integer type, to the
|
|
/// integer type VT, by either zero-extending or truncating it.
|
|
SDValue getZExtOrTrunc(SDValue Op, DebugLoc DL, EVT VT);
|
|
|
|
/// getZeroExtendInReg - Return the expression required to zero extend the Op
|
|
/// value assuming it was the smaller SrcTy value.
|
|
SDValue getZeroExtendInReg(SDValue Op, DebugLoc DL, EVT SrcTy);
|
|
|
|
/// getNOT - Create a bitwise NOT operation as (XOR Val, -1).
|
|
SDValue getNOT(DebugLoc DL, SDValue Val, EVT VT);
|
|
|
|
/// getCALLSEQ_START - Return a new CALLSEQ_START node, which always must have
|
|
/// a flag result (to ensure it's not CSE'd). CALLSEQ_START does not have a
|
|
/// useful DebugLoc.
|
|
SDValue getCALLSEQ_START(SDValue Chain, SDValue Op) {
|
|
SDVTList VTs = getVTList(MVT::Other, MVT::Flag);
|
|
SDValue Ops[] = { Chain, Op };
|
|
return getNode(ISD::CALLSEQ_START, DebugLoc(), VTs, Ops, 2);
|
|
}
|
|
|
|
/// getCALLSEQ_END - Return a new CALLSEQ_END node, which always must have a
|
|
/// flag result (to ensure it's not CSE'd). CALLSEQ_END does not have
|
|
/// a useful DebugLoc.
|
|
SDValue getCALLSEQ_END(SDValue Chain, SDValue Op1, SDValue Op2,
|
|
SDValue InFlag) {
|
|
SDVTList NodeTys = getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDValue, 4> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Op1);
|
|
Ops.push_back(Op2);
|
|
Ops.push_back(InFlag);
|
|
return getNode(ISD::CALLSEQ_END, DebugLoc(), NodeTys, &Ops[0],
|
|
(unsigned)Ops.size() - (InFlag.getNode() == 0 ? 1 : 0));
|
|
}
|
|
|
|
/// getUNDEF - Return an UNDEF node. UNDEF does not have a useful DebugLoc.
|
|
SDValue getUNDEF(EVT VT) {
|
|
return getNode(ISD::UNDEF, DebugLoc(), VT);
|
|
}
|
|
|
|
/// getGLOBAL_OFFSET_TABLE - Return a GLOBAL_OFFSET_TABLE node. This does
|
|
/// not have a useful DebugLoc.
|
|
SDValue getGLOBAL_OFFSET_TABLE(EVT VT) {
|
|
return getNode(ISD::GLOBAL_OFFSET_TABLE, DebugLoc(), VT);
|
|
}
|
|
|
|
/// getNode - Gets or creates the specified node.
|
|
///
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT, SDValue N);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT, SDValue N1, SDValue N2);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT,
|
|
SDValue N1, SDValue N2, SDValue N3);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT,
|
|
SDValue N1, SDValue N2, SDValue N3, SDValue N4);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT,
|
|
SDValue N1, SDValue N2, SDValue N3, SDValue N4,
|
|
SDValue N5);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT,
|
|
const SDUse *Ops, unsigned NumOps);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, EVT VT,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL,
|
|
const std::vector<EVT> &ResultTys,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, const EVT *VTs, unsigned NumVTs,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs, SDValue N);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs,
|
|
SDValue N1, SDValue N2);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs,
|
|
SDValue N1, SDValue N2, SDValue N3);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs,
|
|
SDValue N1, SDValue N2, SDValue N3, SDValue N4);
|
|
SDValue getNode(unsigned Opcode, DebugLoc DL, SDVTList VTs,
|
|
SDValue N1, SDValue N2, SDValue N3, SDValue N4,
|
|
SDValue N5);
|
|
|
|
/// getStackArgumentTokenFactor - 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, DebugLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol, bool AlwaysInline,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo);
|
|
|
|
SDValue getMemmove(SDValue Chain, DebugLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol,
|
|
MachinePointerInfo DstPtrInfo,
|
|
MachinePointerInfo SrcPtrInfo);
|
|
|
|
SDValue getMemset(SDValue Chain, DebugLoc dl, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVol,
|
|
MachinePointerInfo DstPtrInfo);
|
|
|
|
/// getSetCC - Helper function to make it easier to build SetCC's if you just
|
|
/// have an ISD::CondCode instead of an SDValue.
|
|
///
|
|
SDValue getSetCC(DebugLoc DL, EVT VT, SDValue LHS, SDValue RHS,
|
|
ISD::CondCode Cond) {
|
|
return getNode(ISD::SETCC, DL, VT, LHS, RHS, getCondCode(Cond));
|
|
}
|
|
|
|
/// getVSetCC - Helper function to make it easier to build VSetCC's nodes
|
|
/// if you just have an ISD::CondCode instead of an SDValue.
|
|
///
|
|
SDValue getVSetCC(DebugLoc DL, EVT VT, SDValue LHS, SDValue RHS,
|
|
ISD::CondCode Cond) {
|
|
return getNode(ISD::VSETCC, DL, VT, LHS, RHS, getCondCode(Cond));
|
|
}
|
|
|
|
/// getSelectCC - Helper function to make it easier to build SelectCC's if you
|
|
/// just have an ISD::CondCode instead of an SDValue.
|
|
///
|
|
SDValue getSelectCC(DebugLoc 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));
|
|
}
|
|
|
|
/// getVAArg - VAArg produces a result and token chain, and takes a pointer
|
|
/// and a source value as input.
|
|
SDValue getVAArg(EVT VT, DebugLoc dl, SDValue Chain, SDValue Ptr,
|
|
SDValue SV, unsigned Align);
|
|
|
|
/// getAtomic - Gets a node for an atomic op, produces result and chain and
|
|
/// takes 3 operands
|
|
SDValue getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Cmp, SDValue Swp,
|
|
MachinePointerInfo PtrInfo, unsigned Alignment=0);
|
|
SDValue getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Cmp, SDValue Swp,
|
|
MachineMemOperand *MMO);
|
|
|
|
/// getAtomic - Gets a node for an atomic op, produces result and chain and
|
|
/// takes 2 operands.
|
|
SDValue getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Val, const Value* PtrVal,
|
|
unsigned Alignment = 0);
|
|
SDValue getAtomic(unsigned Opcode, DebugLoc dl, EVT MemVT, SDValue Chain,
|
|
SDValue Ptr, SDValue Val,
|
|
MachineMemOperand *MMO);
|
|
|
|
/// getMemIntrinsicNode - 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, DebugLoc dl,
|
|
const EVT *VTs, unsigned NumVTs,
|
|
const SDValue *Ops, unsigned NumOps,
|
|
EVT MemVT, MachinePointerInfo PtrInfo,
|
|
unsigned Align = 0, bool Vol = false,
|
|
bool ReadMem = true, bool WriteMem = true);
|
|
|
|
SDValue getMemIntrinsicNode(unsigned Opcode, DebugLoc dl, SDVTList VTList,
|
|
const SDValue *Ops, unsigned NumOps,
|
|
EVT MemVT, MachinePointerInfo PtrInfo,
|
|
unsigned Align = 0, bool Vol = false,
|
|
bool ReadMem = true, bool WriteMem = true);
|
|
|
|
SDValue getMemIntrinsicNode(unsigned Opcode, DebugLoc dl, SDVTList VTList,
|
|
const SDValue *Ops, unsigned NumOps,
|
|
EVT MemVT, MachineMemOperand *MMO);
|
|
|
|
/// getMergeValues - Create a MERGE_VALUES node from the given operands.
|
|
SDValue getMergeValues(const SDValue *Ops, unsigned NumOps, DebugLoc dl);
|
|
|
|
/// getLoad - 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, DebugLoc dl, SDValue Chain, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, bool isVolatile,
|
|
bool isNonTemporal, unsigned Alignment,
|
|
const MDNode *TBAAInfo = 0);
|
|
SDValue getExtLoad(ISD::LoadExtType ExtType, EVT VT, DebugLoc dl,
|
|
SDValue Chain, SDValue Ptr, MachinePointerInfo PtrInfo,
|
|
EVT MemVT, bool isVolatile,
|
|
bool isNonTemporal, unsigned Alignment,
|
|
const MDNode *TBAAInfo = 0);
|
|
SDValue getIndexedLoad(SDValue OrigLoad, DebugLoc dl, SDValue Base,
|
|
SDValue Offset, ISD::MemIndexedMode AM);
|
|
SDValue getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
|
|
EVT VT, DebugLoc dl,
|
|
SDValue Chain, SDValue Ptr, SDValue Offset,
|
|
MachinePointerInfo PtrInfo, EVT MemVT,
|
|
bool isVolatile, bool isNonTemporal, unsigned Alignment,
|
|
const MDNode *TBAAInfo = 0);
|
|
SDValue getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
|
|
EVT VT, DebugLoc dl,
|
|
SDValue Chain, SDValue Ptr, SDValue Offset,
|
|
EVT MemVT, MachineMemOperand *MMO);
|
|
|
|
/// getStore - Helper function to build ISD::STORE nodes.
|
|
///
|
|
SDValue getStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, bool isVolatile,
|
|
bool isNonTemporal, unsigned Alignment,
|
|
const MDNode *TBAAInfo = 0);
|
|
SDValue getStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
|
|
MachineMemOperand *MMO);
|
|
SDValue getTruncStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
|
|
MachinePointerInfo PtrInfo, EVT TVT,
|
|
bool isNonTemporal, bool isVolatile,
|
|
unsigned Alignment,
|
|
const MDNode *TBAAInfo = 0);
|
|
SDValue getTruncStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
|
|
EVT TVT, MachineMemOperand *MMO);
|
|
SDValue getIndexedStore(SDValue OrigStoe, DebugLoc dl, SDValue Base,
|
|
SDValue Offset, ISD::MemIndexedMode AM);
|
|
|
|
/// getSrcValue - Construct a node to track a Value* through the backend.
|
|
SDValue getSrcValue(const Value *v);
|
|
|
|
/// getMDNode - Return an MDNodeSDNode which holds an MDNode.
|
|
SDValue getMDNode(const MDNode *MD);
|
|
|
|
/// getShiftAmountOperand - Return the specified value casted to
|
|
/// the target's desired shift amount type.
|
|
SDValue getShiftAmountOperand(SDValue Op);
|
|
|
|
/// UpdateNodeOperands - *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,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
|
|
/// SelectNodeTo - 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,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1, EVT VT2);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, const SDValue *Ops, unsigned NumOps);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, EVT VT1,
|
|
EVT VT2, EVT VT3, const SDValue *Ops, unsigned NumOps);
|
|
SDNode *SelectNodeTo(SDNode *N, unsigned MachineOpc, EVT VT1,
|
|
EVT VT2, EVT VT3, EVT VT4, const SDValue *Ops,
|
|
unsigned NumOps);
|
|
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,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
|
|
/// MorphNodeTo - This *mutates* the specified node to have the specified
|
|
/// return type, opcode, and operands.
|
|
SDNode *MorphNodeTo(SDNode *N, unsigned Opc, SDVTList VTs,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
|
|
/// getMachineNode - 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, DebugLoc dl, EVT VT);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT,
|
|
SDValue Op1);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT,
|
|
SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT,
|
|
SDValue Op1, SDValue Op2, SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
SDValue Op1);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1,
|
|
EVT VT2, SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1,
|
|
EVT VT2, SDValue Op1, SDValue Op2, SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, SDValue Op1, SDValue Op2);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, SDValue Op1, SDValue Op2, SDValue Op3);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, const SDValue *Ops, unsigned NumOps);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, EVT VT1, EVT VT2,
|
|
EVT VT3, EVT VT4, const SDValue *Ops, unsigned NumOps);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl,
|
|
const std::vector<EVT> &ResultTys, const SDValue *Ops,
|
|
unsigned NumOps);
|
|
MachineSDNode *getMachineNode(unsigned Opcode, DebugLoc dl, SDVTList VTs,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
|
|
/// getTargetExtractSubreg - A convenience function for creating
|
|
/// TargetInstrInfo::EXTRACT_SUBREG nodes.
|
|
SDValue getTargetExtractSubreg(int SRIdx, DebugLoc DL, EVT VT,
|
|
SDValue Operand);
|
|
|
|
/// getTargetInsertSubreg - A convenience function for creating
|
|
/// TargetInstrInfo::INSERT_SUBREG nodes.
|
|
SDValue getTargetInsertSubreg(int SRIdx, DebugLoc DL, EVT VT,
|
|
SDValue Operand, SDValue Subreg);
|
|
|
|
/// getNodeIfExists - Get the specified node if it's already available, or
|
|
/// else return NULL.
|
|
SDNode *getNodeIfExists(unsigned Opcode, SDVTList VTs,
|
|
const SDValue *Ops, unsigned NumOps);
|
|
|
|
/// getDbgValue - Creates a SDDbgValue node.
|
|
///
|
|
SDDbgValue *getDbgValue(MDNode *MDPtr, SDNode *N, unsigned R, uint64_t Off,
|
|
DebugLoc DL, unsigned O);
|
|
SDDbgValue *getDbgValue(MDNode *MDPtr, const Value *C, uint64_t Off,
|
|
DebugLoc DL, unsigned O);
|
|
SDDbgValue *getDbgValue(MDNode *MDPtr, unsigned FI, uint64_t Off,
|
|
DebugLoc DL, unsigned O);
|
|
|
|
/// DAGUpdateListener - Clients of various APIs that cause global effects on
|
|
/// the DAG can optionally implement this interface. This allows the clients
|
|
/// to handle the various sorts of updates that happen.
|
|
class DAGUpdateListener {
|
|
public:
|
|
virtual ~DAGUpdateListener();
|
|
|
|
/// NodeDeleted - The node N that was deleted and, if E is not null, an
|
|
/// equivalent node E that replaced it.
|
|
virtual void NodeDeleted(SDNode *N, SDNode *E) = 0;
|
|
|
|
/// NodeUpdated - The node N that was updated.
|
|
virtual void NodeUpdated(SDNode *N) = 0;
|
|
};
|
|
|
|
/// RemoveDeadNode - 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, DAGUpdateListener *UpdateListener = 0);
|
|
|
|
/// RemoveDeadNodes - This method deletes the unreachable nodes in the
|
|
/// given list, and any nodes that become unreachable as a result.
|
|
void RemoveDeadNodes(SmallVectorImpl<SDNode *> &DeadNodes,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
|
|
/// ReplaceAllUsesWith - 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 transfered to To.
|
|
///
|
|
void ReplaceAllUsesWith(SDValue From, SDValue Op,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
void ReplaceAllUsesWith(SDNode *From, SDNode *To,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
void ReplaceAllUsesWith(SDNode *From, const SDValue *To,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
|
|
/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
|
|
/// uses of other values produced by From.Val alone.
|
|
void ReplaceAllUsesOfValueWith(SDValue From, SDValue To,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
|
|
/// ReplaceAllUsesOfValuesWith - 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,
|
|
DAGUpdateListener *UpdateListener = 0);
|
|
|
|
/// AssignTopologicalOrder - 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();
|
|
|
|
/// RepositionNode - 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));
|
|
}
|
|
|
|
/// isCommutativeBinOp - 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: return true;
|
|
default: return false;
|
|
}
|
|
}
|
|
|
|
/// AssignOrdering - Assign an order to the SDNode.
|
|
void AssignOrdering(const SDNode *SD, unsigned Order);
|
|
|
|
/// GetOrdering - Get the order for the SDNode.
|
|
unsigned GetOrdering(const SDNode *SD) const;
|
|
|
|
/// AddDbgValue - 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);
|
|
|
|
/// GetDbgValues - Get the debug values which reference the given SDNode.
|
|
SmallVector<SDDbgValue*,2> &GetDbgValues(const SDNode* SD) {
|
|
return DbgInfo->getSDDbgValues(SD);
|
|
}
|
|
|
|
/// hasDebugValues - 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;
|
|
|
|
/// CreateStackTemporary - 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);
|
|
|
|
/// CreateStackTemporary - Create a stack temporary suitable for holding
|
|
/// either of the specified value types.
|
|
SDValue CreateStackTemporary(EVT VT1, EVT VT2);
|
|
|
|
/// FoldConstantArithmetic -
|
|
SDValue FoldConstantArithmetic(unsigned Opcode,
|
|
EVT VT,
|
|
ConstantSDNode *Cst1,
|
|
ConstantSDNode *Cst2);
|
|
|
|
/// FoldSetCC - Constant fold a setcc to true or false.
|
|
SDValue FoldSetCC(EVT VT, SDValue N1,
|
|
SDValue N2, ISD::CondCode Cond, DebugLoc dl);
|
|
|
|
/// SignBitIsZero - 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;
|
|
|
|
/// MaskedValueIsZero - 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;
|
|
|
|
/// ComputeMaskedBits - Determine which of the bits specified in Mask are
|
|
/// known to be either zero or one and return them in the KnownZero/KnownOne
|
|
/// bitsets. This code only analyzes bits in Mask, in order to short-circuit
|
|
/// processing. Targets can implement the computeMaskedBitsForTargetNode
|
|
/// method in the TargetLowering class to allow target nodes to be understood.
|
|
void ComputeMaskedBits(SDValue Op, const APInt &Mask, APInt &KnownZero,
|
|
APInt &KnownOne, unsigned Depth = 0) const;
|
|
|
|
/// ComputeNumSignBits - 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;
|
|
|
|
/// isKnownNeverNan - Test whether the given SDValue is known to never be NaN.
|
|
bool isKnownNeverNaN(SDValue Op) const;
|
|
|
|
/// isKnownNeverZero - Test whether the given SDValue is known to never be
|
|
/// positive or negative Zero.
|
|
bool isKnownNeverZero(SDValue Op) const;
|
|
|
|
/// isEqualTo - 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;
|
|
|
|
/// isVerifiedDebugInfoDesc - Returns true if the specified SDValue has
|
|
/// been verified as a debug information descriptor.
|
|
bool isVerifiedDebugInfoDesc(SDValue Op) const;
|
|
|
|
/// UnrollVectorOp - 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);
|
|
|
|
/// isConsecutiveLoad - 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;
|
|
|
|
/// InferPtrAlignment - Infer alignment of a load / store address. Return 0 if
|
|
/// it cannot be inferred.
|
|
unsigned InferPtrAlignment(SDValue Ptr) const;
|
|
|
|
private:
|
|
bool RemoveNodeFromCSEMaps(SDNode *N);
|
|
void AddModifiedNodeToCSEMaps(SDNode *N, DAGUpdateListener *UpdateListener);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, SDValue Op, void *&InsertPos);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, SDValue Op1, SDValue Op2,
|
|
void *&InsertPos);
|
|
SDNode *FindModifiedNodeSlot(SDNode *N, const SDValue *Ops, unsigned NumOps,
|
|
void *&InsertPos);
|
|
|
|
void DeleteNodeNotInCSEMaps(SDNode *N);
|
|
void DeallocateNode(SDNode *N);
|
|
|
|
unsigned getEVTAlignment(EVT MemoryVT) const;
|
|
|
|
void allnodes_clear();
|
|
|
|
/// VTList - List of non-single value types.
|
|
std::vector<SDVTList> VTList;
|
|
|
|
/// CondCodeNodes - Maps to auto-CSE operations.
|
|
std::vector<CondCodeSDNode*> CondCodeNodes;
|
|
|
|
std::vector<SDNode*> ValueTypeNodes;
|
|
std::map<EVT, SDNode*, EVT::compareRawBits> ExtendedValueTypeNodes;
|
|
StringMap<SDNode*> ExternalSymbols;
|
|
|
|
std::map<std::pair<std::string, unsigned char>,SDNode*> TargetExternalSymbols;
|
|
};
|
|
|
|
template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
|
|
typedef SelectionDAG::allnodes_iterator nodes_iterator;
|
|
static nodes_iterator nodes_begin(SelectionDAG *G) {
|
|
return G->allnodes_begin();
|
|
}
|
|
static nodes_iterator nodes_end(SelectionDAG *G) {
|
|
return G->allnodes_end();
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|