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eb47c07b14
This patch introduces two helpers to make it easier to ignore debug intrinsics: - Instruction::getNextNonDebugInstruction() This is just like Instruction::getNextNode(), except that it skips debug info. - skipDebugInfo(BasicBlock::iterator) A free function which advances a BasicBlock iterator past any debug info. This is a no-op when the iterator already points to a non-debug instruction. Part of: llvm.org/PR37728 Related to: https://reviews.llvm.org/D47874 Differential Revision: https://reviews.llvm.org/D48305 llvm-svn: 335083
731 lines
25 KiB
C++
731 lines
25 KiB
C++
//===-- Instruction.cpp - Implement the Instruction class -----------------===//
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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 implements the Instruction class for the IR library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/MDBuilder.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/IR/Type.h"
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using namespace llvm;
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Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
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Instruction *InsertBefore)
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: User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(nullptr) {
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// If requested, insert this instruction into a basic block...
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if (InsertBefore) {
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BasicBlock *BB = InsertBefore->getParent();
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assert(BB && "Instruction to insert before is not in a basic block!");
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BB->getInstList().insert(InsertBefore->getIterator(), this);
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}
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}
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Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
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BasicBlock *InsertAtEnd)
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: User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(nullptr) {
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// append this instruction into the basic block
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assert(InsertAtEnd && "Basic block to append to may not be NULL!");
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InsertAtEnd->getInstList().push_back(this);
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}
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Instruction::~Instruction() {
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assert(!Parent && "Instruction still linked in the program!");
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if (hasMetadataHashEntry())
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clearMetadataHashEntries();
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}
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void Instruction::setParent(BasicBlock *P) {
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Parent = P;
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}
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const Module *Instruction::getModule() const {
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return getParent()->getModule();
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}
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const Function *Instruction::getFunction() const {
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return getParent()->getParent();
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}
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void Instruction::removeFromParent() {
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getParent()->getInstList().remove(getIterator());
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}
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iplist<Instruction>::iterator Instruction::eraseFromParent() {
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return getParent()->getInstList().erase(getIterator());
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}
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/// Insert an unlinked instruction into a basic block immediately before the
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/// specified instruction.
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void Instruction::insertBefore(Instruction *InsertPos) {
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InsertPos->getParent()->getInstList().insert(InsertPos->getIterator(), this);
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}
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/// Insert an unlinked instruction into a basic block immediately after the
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/// specified instruction.
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void Instruction::insertAfter(Instruction *InsertPos) {
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InsertPos->getParent()->getInstList().insertAfter(InsertPos->getIterator(),
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this);
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}
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/// Unlink this instruction from its current basic block and insert it into the
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/// basic block that MovePos lives in, right before MovePos.
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void Instruction::moveBefore(Instruction *MovePos) {
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moveBefore(*MovePos->getParent(), MovePos->getIterator());
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}
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void Instruction::moveAfter(Instruction *MovePos) {
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moveBefore(*MovePos->getParent(), ++MovePos->getIterator());
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}
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void Instruction::moveBefore(BasicBlock &BB,
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SymbolTableList<Instruction>::iterator I) {
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assert(I == BB.end() || I->getParent() == &BB);
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BB.getInstList().splice(I, getParent()->getInstList(), getIterator());
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}
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void Instruction::setHasNoUnsignedWrap(bool b) {
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cast<OverflowingBinaryOperator>(this)->setHasNoUnsignedWrap(b);
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}
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void Instruction::setHasNoSignedWrap(bool b) {
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cast<OverflowingBinaryOperator>(this)->setHasNoSignedWrap(b);
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}
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void Instruction::setIsExact(bool b) {
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cast<PossiblyExactOperator>(this)->setIsExact(b);
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}
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bool Instruction::hasNoUnsignedWrap() const {
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return cast<OverflowingBinaryOperator>(this)->hasNoUnsignedWrap();
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}
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bool Instruction::hasNoSignedWrap() const {
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return cast<OverflowingBinaryOperator>(this)->hasNoSignedWrap();
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}
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void Instruction::dropPoisonGeneratingFlags() {
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switch (getOpcode()) {
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case Instruction::Add:
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case Instruction::Sub:
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case Instruction::Mul:
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case Instruction::Shl:
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cast<OverflowingBinaryOperator>(this)->setHasNoUnsignedWrap(false);
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cast<OverflowingBinaryOperator>(this)->setHasNoSignedWrap(false);
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break;
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case Instruction::UDiv:
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case Instruction::SDiv:
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case Instruction::AShr:
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case Instruction::LShr:
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cast<PossiblyExactOperator>(this)->setIsExact(false);
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break;
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case Instruction::GetElementPtr:
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cast<GetElementPtrInst>(this)->setIsInBounds(false);
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break;
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}
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}
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bool Instruction::isExact() const {
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return cast<PossiblyExactOperator>(this)->isExact();
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}
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void Instruction::setFast(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setFast(B);
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}
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void Instruction::setHasAllowReassoc(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasAllowReassoc(B);
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}
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void Instruction::setHasNoNaNs(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasNoNaNs(B);
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}
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void Instruction::setHasNoInfs(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasNoInfs(B);
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}
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void Instruction::setHasNoSignedZeros(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasNoSignedZeros(B);
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}
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void Instruction::setHasAllowReciprocal(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasAllowReciprocal(B);
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}
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void Instruction::setHasApproxFunc(bool B) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setHasApproxFunc(B);
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}
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void Instruction::setFastMathFlags(FastMathFlags FMF) {
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assert(isa<FPMathOperator>(this) && "setting fast-math flag on invalid op");
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cast<FPMathOperator>(this)->setFastMathFlags(FMF);
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}
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void Instruction::copyFastMathFlags(FastMathFlags FMF) {
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assert(isa<FPMathOperator>(this) && "copying fast-math flag on invalid op");
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cast<FPMathOperator>(this)->copyFastMathFlags(FMF);
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}
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bool Instruction::isFast() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->isFast();
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}
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bool Instruction::hasAllowReassoc() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasAllowReassoc();
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}
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bool Instruction::hasNoNaNs() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasNoNaNs();
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}
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bool Instruction::hasNoInfs() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasNoInfs();
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}
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bool Instruction::hasNoSignedZeros() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasNoSignedZeros();
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}
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bool Instruction::hasAllowReciprocal() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasAllowReciprocal();
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}
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bool Instruction::hasAllowContract() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasAllowContract();
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}
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bool Instruction::hasApproxFunc() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->hasApproxFunc();
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}
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FastMathFlags Instruction::getFastMathFlags() const {
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assert(isa<FPMathOperator>(this) && "getting fast-math flag on invalid op");
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return cast<FPMathOperator>(this)->getFastMathFlags();
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}
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void Instruction::copyFastMathFlags(const Instruction *I) {
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copyFastMathFlags(I->getFastMathFlags());
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}
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void Instruction::copyIRFlags(const Value *V, bool IncludeWrapFlags) {
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// Copy the wrapping flags.
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if (IncludeWrapFlags && isa<OverflowingBinaryOperator>(this)) {
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if (auto *OB = dyn_cast<OverflowingBinaryOperator>(V)) {
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setHasNoSignedWrap(OB->hasNoSignedWrap());
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setHasNoUnsignedWrap(OB->hasNoUnsignedWrap());
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}
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}
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// Copy the exact flag.
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if (auto *PE = dyn_cast<PossiblyExactOperator>(V))
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if (isa<PossiblyExactOperator>(this))
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setIsExact(PE->isExact());
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// Copy the fast-math flags.
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if (auto *FP = dyn_cast<FPMathOperator>(V))
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if (isa<FPMathOperator>(this))
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copyFastMathFlags(FP->getFastMathFlags());
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if (auto *SrcGEP = dyn_cast<GetElementPtrInst>(V))
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if (auto *DestGEP = dyn_cast<GetElementPtrInst>(this))
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DestGEP->setIsInBounds(SrcGEP->isInBounds() | DestGEP->isInBounds());
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}
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void Instruction::andIRFlags(const Value *V) {
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if (auto *OB = dyn_cast<OverflowingBinaryOperator>(V)) {
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if (isa<OverflowingBinaryOperator>(this)) {
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setHasNoSignedWrap(hasNoSignedWrap() & OB->hasNoSignedWrap());
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setHasNoUnsignedWrap(hasNoUnsignedWrap() & OB->hasNoUnsignedWrap());
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}
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}
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if (auto *PE = dyn_cast<PossiblyExactOperator>(V))
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if (isa<PossiblyExactOperator>(this))
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setIsExact(isExact() & PE->isExact());
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if (auto *FP = dyn_cast<FPMathOperator>(V)) {
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if (isa<FPMathOperator>(this)) {
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FastMathFlags FM = getFastMathFlags();
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FM &= FP->getFastMathFlags();
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copyFastMathFlags(FM);
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}
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}
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if (auto *SrcGEP = dyn_cast<GetElementPtrInst>(V))
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if (auto *DestGEP = dyn_cast<GetElementPtrInst>(this))
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DestGEP->setIsInBounds(SrcGEP->isInBounds() & DestGEP->isInBounds());
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}
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const char *Instruction::getOpcodeName(unsigned OpCode) {
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switch (OpCode) {
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// Terminators
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case Ret: return "ret";
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case Br: return "br";
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case Switch: return "switch";
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case IndirectBr: return "indirectbr";
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case Invoke: return "invoke";
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case Resume: return "resume";
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case Unreachable: return "unreachable";
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case CleanupRet: return "cleanupret";
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case CatchRet: return "catchret";
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case CatchPad: return "catchpad";
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case CatchSwitch: return "catchswitch";
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// Standard binary operators...
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case Add: return "add";
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case FAdd: return "fadd";
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case Sub: return "sub";
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case FSub: return "fsub";
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case Mul: return "mul";
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case FMul: return "fmul";
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case UDiv: return "udiv";
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case SDiv: return "sdiv";
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case FDiv: return "fdiv";
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case URem: return "urem";
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case SRem: return "srem";
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case FRem: return "frem";
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// Logical operators...
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case And: return "and";
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case Or : return "or";
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case Xor: return "xor";
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// Memory instructions...
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case Alloca: return "alloca";
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case Load: return "load";
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case Store: return "store";
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case AtomicCmpXchg: return "cmpxchg";
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case AtomicRMW: return "atomicrmw";
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case Fence: return "fence";
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case GetElementPtr: return "getelementptr";
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// Convert instructions...
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case Trunc: return "trunc";
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case ZExt: return "zext";
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case SExt: return "sext";
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case FPTrunc: return "fptrunc";
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case FPExt: return "fpext";
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case FPToUI: return "fptoui";
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case FPToSI: return "fptosi";
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case UIToFP: return "uitofp";
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case SIToFP: return "sitofp";
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case IntToPtr: return "inttoptr";
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case PtrToInt: return "ptrtoint";
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case BitCast: return "bitcast";
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case AddrSpaceCast: return "addrspacecast";
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// Other instructions...
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case ICmp: return "icmp";
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case FCmp: return "fcmp";
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case PHI: return "phi";
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case Select: return "select";
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case Call: return "call";
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case Shl: return "shl";
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case LShr: return "lshr";
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case AShr: return "ashr";
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case VAArg: return "va_arg";
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case ExtractElement: return "extractelement";
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case InsertElement: return "insertelement";
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case ShuffleVector: return "shufflevector";
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case ExtractValue: return "extractvalue";
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case InsertValue: return "insertvalue";
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case LandingPad: return "landingpad";
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case CleanupPad: return "cleanuppad";
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default: return "<Invalid operator> ";
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}
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}
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/// Return true if both instructions have the same special state. This must be
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/// kept in sync with FunctionComparator::cmpOperations in
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/// lib/Transforms/IPO/MergeFunctions.cpp.
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static bool haveSameSpecialState(const Instruction *I1, const Instruction *I2,
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bool IgnoreAlignment = false) {
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assert(I1->getOpcode() == I2->getOpcode() &&
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"Can not compare special state of different instructions");
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if (const AllocaInst *AI = dyn_cast<AllocaInst>(I1))
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return AI->getAllocatedType() == cast<AllocaInst>(I2)->getAllocatedType() &&
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(AI->getAlignment() == cast<AllocaInst>(I2)->getAlignment() ||
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IgnoreAlignment);
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if (const LoadInst *LI = dyn_cast<LoadInst>(I1))
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return LI->isVolatile() == cast<LoadInst>(I2)->isVolatile() &&
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(LI->getAlignment() == cast<LoadInst>(I2)->getAlignment() ||
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IgnoreAlignment) &&
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LI->getOrdering() == cast<LoadInst>(I2)->getOrdering() &&
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LI->getSyncScopeID() == cast<LoadInst>(I2)->getSyncScopeID();
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if (const StoreInst *SI = dyn_cast<StoreInst>(I1))
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return SI->isVolatile() == cast<StoreInst>(I2)->isVolatile() &&
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(SI->getAlignment() == cast<StoreInst>(I2)->getAlignment() ||
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IgnoreAlignment) &&
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SI->getOrdering() == cast<StoreInst>(I2)->getOrdering() &&
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SI->getSyncScopeID() == cast<StoreInst>(I2)->getSyncScopeID();
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if (const CmpInst *CI = dyn_cast<CmpInst>(I1))
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return CI->getPredicate() == cast<CmpInst>(I2)->getPredicate();
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if (const CallInst *CI = dyn_cast<CallInst>(I1))
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return CI->isTailCall() == cast<CallInst>(I2)->isTailCall() &&
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CI->getCallingConv() == cast<CallInst>(I2)->getCallingConv() &&
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CI->getAttributes() == cast<CallInst>(I2)->getAttributes() &&
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CI->hasIdenticalOperandBundleSchema(*cast<CallInst>(I2));
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if (const InvokeInst *CI = dyn_cast<InvokeInst>(I1))
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return CI->getCallingConv() == cast<InvokeInst>(I2)->getCallingConv() &&
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CI->getAttributes() == cast<InvokeInst>(I2)->getAttributes() &&
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CI->hasIdenticalOperandBundleSchema(*cast<InvokeInst>(I2));
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if (const InsertValueInst *IVI = dyn_cast<InsertValueInst>(I1))
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return IVI->getIndices() == cast<InsertValueInst>(I2)->getIndices();
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if (const ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(I1))
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return EVI->getIndices() == cast<ExtractValueInst>(I2)->getIndices();
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if (const FenceInst *FI = dyn_cast<FenceInst>(I1))
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return FI->getOrdering() == cast<FenceInst>(I2)->getOrdering() &&
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FI->getSyncScopeID() == cast<FenceInst>(I2)->getSyncScopeID();
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if (const AtomicCmpXchgInst *CXI = dyn_cast<AtomicCmpXchgInst>(I1))
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return CXI->isVolatile() == cast<AtomicCmpXchgInst>(I2)->isVolatile() &&
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CXI->isWeak() == cast<AtomicCmpXchgInst>(I2)->isWeak() &&
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CXI->getSuccessOrdering() ==
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cast<AtomicCmpXchgInst>(I2)->getSuccessOrdering() &&
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CXI->getFailureOrdering() ==
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cast<AtomicCmpXchgInst>(I2)->getFailureOrdering() &&
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CXI->getSyncScopeID() ==
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cast<AtomicCmpXchgInst>(I2)->getSyncScopeID();
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if (const AtomicRMWInst *RMWI = dyn_cast<AtomicRMWInst>(I1))
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return RMWI->getOperation() == cast<AtomicRMWInst>(I2)->getOperation() &&
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RMWI->isVolatile() == cast<AtomicRMWInst>(I2)->isVolatile() &&
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RMWI->getOrdering() == cast<AtomicRMWInst>(I2)->getOrdering() &&
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RMWI->getSyncScopeID() == cast<AtomicRMWInst>(I2)->getSyncScopeID();
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return true;
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}
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bool Instruction::isIdenticalTo(const Instruction *I) const {
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return isIdenticalToWhenDefined(I) &&
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SubclassOptionalData == I->SubclassOptionalData;
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}
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bool Instruction::isIdenticalToWhenDefined(const Instruction *I) const {
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if (getOpcode() != I->getOpcode() ||
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getNumOperands() != I->getNumOperands() ||
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getType() != I->getType())
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return false;
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// If both instructions have no operands, they are identical.
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if (getNumOperands() == 0 && I->getNumOperands() == 0)
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return haveSameSpecialState(this, I);
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// We have two instructions of identical opcode and #operands. Check to see
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// if all operands are the same.
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if (!std::equal(op_begin(), op_end(), I->op_begin()))
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return false;
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if (const PHINode *thisPHI = dyn_cast<PHINode>(this)) {
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const PHINode *otherPHI = cast<PHINode>(I);
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return std::equal(thisPHI->block_begin(), thisPHI->block_end(),
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otherPHI->block_begin());
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}
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return haveSameSpecialState(this, I);
|
|
}
|
|
|
|
// Keep this in sync with FunctionComparator::cmpOperations in
|
|
// lib/Transforms/IPO/MergeFunctions.cpp.
|
|
bool Instruction::isSameOperationAs(const Instruction *I,
|
|
unsigned flags) const {
|
|
bool IgnoreAlignment = flags & CompareIgnoringAlignment;
|
|
bool UseScalarTypes = flags & CompareUsingScalarTypes;
|
|
|
|
if (getOpcode() != I->getOpcode() ||
|
|
getNumOperands() != I->getNumOperands() ||
|
|
(UseScalarTypes ?
|
|
getType()->getScalarType() != I->getType()->getScalarType() :
|
|
getType() != I->getType()))
|
|
return false;
|
|
|
|
// We have two instructions of identical opcode and #operands. Check to see
|
|
// if all operands are the same type
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
|
|
if (UseScalarTypes ?
|
|
getOperand(i)->getType()->getScalarType() !=
|
|
I->getOperand(i)->getType()->getScalarType() :
|
|
getOperand(i)->getType() != I->getOperand(i)->getType())
|
|
return false;
|
|
|
|
return haveSameSpecialState(this, I, IgnoreAlignment);
|
|
}
|
|
|
|
bool Instruction::isUsedOutsideOfBlock(const BasicBlock *BB) const {
|
|
for (const Use &U : uses()) {
|
|
// PHI nodes uses values in the corresponding predecessor block. For other
|
|
// instructions, just check to see whether the parent of the use matches up.
|
|
const Instruction *I = cast<Instruction>(U.getUser());
|
|
const PHINode *PN = dyn_cast<PHINode>(I);
|
|
if (!PN) {
|
|
if (I->getParent() != BB)
|
|
return true;
|
|
continue;
|
|
}
|
|
|
|
if (PN->getIncomingBlock(U) != BB)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Instruction::mayReadFromMemory() const {
|
|
switch (getOpcode()) {
|
|
default: return false;
|
|
case Instruction::VAArg:
|
|
case Instruction::Load:
|
|
case Instruction::Fence: // FIXME: refine definition of mayReadFromMemory
|
|
case Instruction::AtomicCmpXchg:
|
|
case Instruction::AtomicRMW:
|
|
case Instruction::CatchPad:
|
|
case Instruction::CatchRet:
|
|
return true;
|
|
case Instruction::Call:
|
|
return !cast<CallInst>(this)->doesNotAccessMemory();
|
|
case Instruction::Invoke:
|
|
return !cast<InvokeInst>(this)->doesNotAccessMemory();
|
|
case Instruction::Store:
|
|
return !cast<StoreInst>(this)->isUnordered();
|
|
}
|
|
}
|
|
|
|
bool Instruction::mayWriteToMemory() const {
|
|
switch (getOpcode()) {
|
|
default: return false;
|
|
case Instruction::Fence: // FIXME: refine definition of mayWriteToMemory
|
|
case Instruction::Store:
|
|
case Instruction::VAArg:
|
|
case Instruction::AtomicCmpXchg:
|
|
case Instruction::AtomicRMW:
|
|
case Instruction::CatchPad:
|
|
case Instruction::CatchRet:
|
|
return true;
|
|
case Instruction::Call:
|
|
return !cast<CallInst>(this)->onlyReadsMemory();
|
|
case Instruction::Invoke:
|
|
return !cast<InvokeInst>(this)->onlyReadsMemory();
|
|
case Instruction::Load:
|
|
return !cast<LoadInst>(this)->isUnordered();
|
|
}
|
|
}
|
|
|
|
bool Instruction::isAtomic() const {
|
|
switch (getOpcode()) {
|
|
default:
|
|
return false;
|
|
case Instruction::AtomicCmpXchg:
|
|
case Instruction::AtomicRMW:
|
|
case Instruction::Fence:
|
|
return true;
|
|
case Instruction::Load:
|
|
return cast<LoadInst>(this)->getOrdering() != AtomicOrdering::NotAtomic;
|
|
case Instruction::Store:
|
|
return cast<StoreInst>(this)->getOrdering() != AtomicOrdering::NotAtomic;
|
|
}
|
|
}
|
|
|
|
bool Instruction::hasAtomicLoad() const {
|
|
assert(isAtomic());
|
|
switch (getOpcode()) {
|
|
default:
|
|
return false;
|
|
case Instruction::AtomicCmpXchg:
|
|
case Instruction::AtomicRMW:
|
|
case Instruction::Load:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool Instruction::hasAtomicStore() const {
|
|
assert(isAtomic());
|
|
switch (getOpcode()) {
|
|
default:
|
|
return false;
|
|
case Instruction::AtomicCmpXchg:
|
|
case Instruction::AtomicRMW:
|
|
case Instruction::Store:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool Instruction::mayThrow() const {
|
|
if (const CallInst *CI = dyn_cast<CallInst>(this))
|
|
return !CI->doesNotThrow();
|
|
if (const auto *CRI = dyn_cast<CleanupReturnInst>(this))
|
|
return CRI->unwindsToCaller();
|
|
if (const auto *CatchSwitch = dyn_cast<CatchSwitchInst>(this))
|
|
return CatchSwitch->unwindsToCaller();
|
|
return isa<ResumeInst>(this);
|
|
}
|
|
|
|
bool Instruction::isSafeToRemove() const {
|
|
return (!isa<CallInst>(this) || !this->mayHaveSideEffects()) &&
|
|
!isa<TerminatorInst>(this);
|
|
}
|
|
|
|
const Instruction *Instruction::getNextNonDebugInstruction() const {
|
|
for (const Instruction *I = getNextNode(); I; I = I->getNextNode())
|
|
if (!isa<DbgInfoIntrinsic>(I))
|
|
return I;
|
|
return nullptr;
|
|
}
|
|
|
|
bool Instruction::isAssociative() const {
|
|
unsigned Opcode = getOpcode();
|
|
if (isAssociative(Opcode))
|
|
return true;
|
|
|
|
switch (Opcode) {
|
|
case FMul:
|
|
case FAdd:
|
|
return cast<FPMathOperator>(this)->hasAllowReassoc() &&
|
|
cast<FPMathOperator>(this)->hasNoSignedZeros();
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Instruction *Instruction::cloneImpl() const {
|
|
llvm_unreachable("Subclass of Instruction failed to implement cloneImpl");
|
|
}
|
|
|
|
void Instruction::swapProfMetadata() {
|
|
MDNode *ProfileData = getMetadata(LLVMContext::MD_prof);
|
|
if (!ProfileData || ProfileData->getNumOperands() != 3 ||
|
|
!isa<MDString>(ProfileData->getOperand(0)))
|
|
return;
|
|
|
|
MDString *MDName = cast<MDString>(ProfileData->getOperand(0));
|
|
if (MDName->getString() != "branch_weights")
|
|
return;
|
|
|
|
// The first operand is the name. Fetch them backwards and build a new one.
|
|
Metadata *Ops[] = {ProfileData->getOperand(0), ProfileData->getOperand(2),
|
|
ProfileData->getOperand(1)};
|
|
setMetadata(LLVMContext::MD_prof,
|
|
MDNode::get(ProfileData->getContext(), Ops));
|
|
}
|
|
|
|
void Instruction::copyMetadata(const Instruction &SrcInst,
|
|
ArrayRef<unsigned> WL) {
|
|
if (!SrcInst.hasMetadata())
|
|
return;
|
|
|
|
DenseSet<unsigned> WLS;
|
|
for (unsigned M : WL)
|
|
WLS.insert(M);
|
|
|
|
// Otherwise, enumerate and copy over metadata from the old instruction to the
|
|
// new one.
|
|
SmallVector<std::pair<unsigned, MDNode *>, 4> TheMDs;
|
|
SrcInst.getAllMetadataOtherThanDebugLoc(TheMDs);
|
|
for (const auto &MD : TheMDs) {
|
|
if (WL.empty() || WLS.count(MD.first))
|
|
setMetadata(MD.first, MD.second);
|
|
}
|
|
if (WL.empty() || WLS.count(LLVMContext::MD_dbg))
|
|
setDebugLoc(SrcInst.getDebugLoc());
|
|
}
|
|
|
|
Instruction *Instruction::clone() const {
|
|
Instruction *New = nullptr;
|
|
switch (getOpcode()) {
|
|
default:
|
|
llvm_unreachable("Unhandled Opcode.");
|
|
#define HANDLE_INST(num, opc, clas) \
|
|
case Instruction::opc: \
|
|
New = cast<clas>(this)->cloneImpl(); \
|
|
break;
|
|
#include "llvm/IR/Instruction.def"
|
|
#undef HANDLE_INST
|
|
}
|
|
|
|
New->SubclassOptionalData = SubclassOptionalData;
|
|
New->copyMetadata(*this);
|
|
return New;
|
|
}
|
|
|
|
void Instruction::updateProfWeight(uint64_t S, uint64_t T) {
|
|
auto *ProfileData = getMetadata(LLVMContext::MD_prof);
|
|
if (ProfileData == nullptr)
|
|
return;
|
|
|
|
auto *ProfDataName = dyn_cast<MDString>(ProfileData->getOperand(0));
|
|
if (!ProfDataName || (!ProfDataName->getString().equals("branch_weights") &&
|
|
!ProfDataName->getString().equals("VP")))
|
|
return;
|
|
|
|
MDBuilder MDB(getContext());
|
|
SmallVector<Metadata *, 3> Vals;
|
|
Vals.push_back(ProfileData->getOperand(0));
|
|
APInt APS(128, S), APT(128, T);
|
|
if (ProfDataName->getString().equals("branch_weights"))
|
|
for (unsigned i = 1; i < ProfileData->getNumOperands(); i++) {
|
|
// Using APInt::div may be expensive, but most cases should fit 64 bits.
|
|
APInt Val(128,
|
|
mdconst::dyn_extract<ConstantInt>(ProfileData->getOperand(i))
|
|
->getValue()
|
|
.getZExtValue());
|
|
Val *= APS;
|
|
Vals.push_back(MDB.createConstant(
|
|
ConstantInt::get(Type::getInt64Ty(getContext()),
|
|
Val.udiv(APT).getLimitedValue())));
|
|
}
|
|
else if (ProfDataName->getString().equals("VP"))
|
|
for (unsigned i = 1; i < ProfileData->getNumOperands(); i += 2) {
|
|
// The first value is the key of the value profile, which will not change.
|
|
Vals.push_back(ProfileData->getOperand(i));
|
|
// Using APInt::div may be expensive, but most cases should fit 64 bits.
|
|
APInt Val(128,
|
|
mdconst::dyn_extract<ConstantInt>(ProfileData->getOperand(i + 1))
|
|
->getValue()
|
|
.getZExtValue());
|
|
Val *= APS;
|
|
Vals.push_back(MDB.createConstant(
|
|
ConstantInt::get(Type::getInt64Ty(getContext()),
|
|
Val.udiv(APT).getLimitedValue())));
|
|
}
|
|
setMetadata(LLVMContext::MD_prof, MDNode::get(getContext(), Vals));
|
|
}
|
|
|
|
void Instruction::setProfWeight(uint64_t W) {
|
|
assert((isa<CallInst>(this) || isa<InvokeInst>(this)) &&
|
|
"Can only set weights for call and invoke instrucitons");
|
|
SmallVector<uint32_t, 1> Weights;
|
|
Weights.push_back(W);
|
|
MDBuilder MDB(getContext());
|
|
setMetadata(LLVMContext::MD_prof, MDB.createBranchWeights(Weights));
|
|
}
|