LLVM 20.0.0git
SSAContext.cpp
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1//===- SSAContext.cpp -------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8/// \file
9///
10/// This file defines a specialization of the GenericSSAContext<X>
11/// template class for LLVM IR.
12///
13//===----------------------------------------------------------------------===//
14
15#include "llvm/IR/SSAContext.h"
16#include "llvm/IR/BasicBlock.h"
17#include "llvm/IR/Function.h"
19#include "llvm/IR/Intrinsics.h"
22
23using namespace llvm;
24
25template <>
28 for (auto &instr : block) {
29 if (instr.isTerminator())
30 break;
31 defs.push_back(&instr);
32 }
33}
34
35template <>
37 const BasicBlock &block) {
38 for (auto &instr : block) {
39 if (instr.isTerminator())
40 break;
41 defs.push_back(&instr);
42 }
43}
44
45template <>
48 terms.push_back(block.getTerminator());
49}
50
51template <>
53 const BasicBlock &block) {
54 terms.push_back(block.getTerminator());
55}
56
57template <>
58const BasicBlock *SSAContext::getDefBlock(const Value *value) const {
59 if (const auto *instruction = dyn_cast<Instruction>(value))
60 return instruction->getParent();
61 return nullptr;
62}
63
64template <>
66 if (auto *Phi = dyn_cast<PHINode>(&Instr))
67 return Phi->hasConstantOrUndefValue();
68 return false;
69}
70
72 if (auto *CB = dyn_cast<CallBase>(&I))
73 return CB->getIntrinsicID();
75}
76
77template <> Printable SSAContext::print(const Value *V) const {
78 return Printable([V](raw_ostream &Out) { V->print(Out); });
79}
80
81template <> Printable SSAContext::print(const Instruction *Inst) const {
82 return print(cast<Value>(Inst));
83}
84
85template <> Printable SSAContext::print(const BasicBlock *BB) const {
86 if (!BB)
87 return Printable([](raw_ostream &Out) { Out << "<nullptr>"; });
88 if (BB->hasName())
89 return Printable([BB](raw_ostream &Out) { Out << BB->getName(); });
90
91 return Printable([BB](raw_ostream &Out) {
92 ModuleSlotTracker MST{BB->getParent()->getParent(), false};
93 MST.incorporateFunction(*BB->getParent());
94 Out << MST.getLocalSlot(BB);
95 });
96}
97
98template <> Printable SSAContext::printAsOperand(const BasicBlock *BB) const {
99 return Printable([BB](raw_ostream &Out) { BB->printAsOperand(Out); });
100}
static const Function * getParent(const Value *V)
Given that RA is a live value
#define I(x, y, z)
Definition: MD5.cpp:58
This file declares a specialization of the GenericSSAContext<X> class template for LLVM IR.
unify loop Fixup each natural loop to have a single exit block
LLVM Basic Block Representation.
Definition: BasicBlock.h:61
const Function * getParent() const
Return the enclosing method, or null if none.
Definition: BasicBlock.h:219
static void appendBlockDefs(SmallVectorImpl< ValueRefT > &defs, BlockT &block)
static bool isConstantOrUndefValuePhi(const InstructionT &Instr)
static void appendBlockTerms(SmallVectorImpl< InstructionT * > &terms, BlockT &block)
static Intrinsic::ID getIntrinsicID(const InstructionT &I)
Printable print(const BlockT *block) const
const BlockT * getDefBlock(ConstValueRefT value) const
Printable printAsOperand(const BlockT *BB) const
Manage lifetime of a slot tracker for printing IR.
Simple wrapper around std::function<void(raw_ostream&)>.
Definition: Printable.h:38
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: SmallVector.h:573
void push_back(const T &Elt)
Definition: SmallVector.h:413
LLVM Value Representation.
Definition: Value.h:74
void printAsOperand(raw_ostream &O, bool PrintType=true, const Module *M=nullptr) const
Print the name of this Value out to the specified raw_ostream.
Definition: AsmWriter.cpp:5144
bool hasName() const
Definition: Value.h:261
StringRef getName() const
Return a constant reference to the value's name.
Definition: Value.cpp:309
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
MCInst const & instruction(MCInst const &MCB, size_t Index)
NodeAddr< PhiNode * > Phi
Definition: RDFGraph.h:390
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18