mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
0f7053bd01
The index is a property of the argument. There is no reason from a modeling perspective to go through the BB to get it. Swift SVN r21338
132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
//===--- SILBasicBlock.cpp - Basic blocks for high-level SIL code ----------==//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See http://swift.org/LICENSE.txt for license information
|
|
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the high-level BasicBlocks used for Swift SIL code.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "swift/SIL/SILBasicBlock.h"
|
|
#include "swift/SIL/SILArgument.h"
|
|
#include "swift/SIL/SILFunction.h"
|
|
#include "swift/SIL/SILInstruction.h"
|
|
#include "swift/SIL/SILModule.h"
|
|
using namespace swift;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SILArgument Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
SILArgument::SILArgument(SILType Ty, SILBasicBlock *ParentBB, const ValueDecl *D)
|
|
: ValueBase(ValueKind::SILArgument, Ty), ParentBB(ParentBB), Decl(D) {
|
|
// Function arguments need to have a decl.
|
|
assert(
|
|
!ParentBB->getParent()->isBare() &&
|
|
ParentBB->getParent()->size() == 1
|
|
? D != nullptr
|
|
: true );
|
|
ParentBB->addArgument(this);
|
|
}
|
|
|
|
|
|
SILFunction *SILArgument::getFunction() {
|
|
return getParent()->getParent();
|
|
}
|
|
const SILFunction *SILArgument::getFunction() const {
|
|
return getParent()->getParent();
|
|
}
|
|
|
|
SILModule &SILArgument::getModule() const {
|
|
return getFunction()->getModule();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SILBasicBlock Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
SILBasicBlock::SILBasicBlock(SILFunction *parent, SILBasicBlock *afterBB)
|
|
: Parent(parent), PredList(0) {
|
|
if (afterBB) {
|
|
parent->getBlocks().insertAfter(afterBB, this);
|
|
} else {
|
|
parent->getBlocks().push_back(this);
|
|
}
|
|
}
|
|
SILBasicBlock::~SILBasicBlock() {
|
|
// iplist's destructor is going to destroy the InstList.
|
|
}
|
|
|
|
SILModule &SILBasicBlock::getModule() const {
|
|
return getParent()->getModule();
|
|
}
|
|
|
|
/// eraseFromParent - This method unlinks 'self' from the containing SIL and
|
|
/// deletes it.
|
|
///
|
|
void SILBasicBlock::eraseFromParent() {
|
|
getParent()->getBlocks().erase(this);
|
|
}
|
|
|
|
/// Replace the ith BB argument with a new one with type Ty (and optional
|
|
/// ValueDecl D).
|
|
SILArgument *SILBasicBlock::replaceBBArg(unsigned i, SILType Ty, ValueDecl *D) {
|
|
SILModule &M = getParent()->getModule();
|
|
assert(BBArgList[i]->use_empty() && "Expected no uses of the old BB arg!");
|
|
|
|
auto *NewArg = new (M) SILArgument(Ty, D);
|
|
NewArg->setParent(this);
|
|
BBArgList[i] = NewArg;
|
|
|
|
return NewArg;
|
|
}
|
|
|
|
SILArgument *SILBasicBlock::createArgument(SILType Ty) {
|
|
return new (getModule()) SILArgument(Ty, this);
|
|
}
|
|
|
|
/// \brief Splits a basic block into two at the specified instruction.
|
|
///
|
|
/// Note that all the instructions BEFORE the specified iterator
|
|
/// stay as part of the original basic block. The old basic block is left
|
|
/// without a terminator.
|
|
SILBasicBlock *SILBasicBlock::splitBasicBlock(iterator I) {
|
|
SILBasicBlock *New = new (Parent->getModule()) SILBasicBlock(Parent);
|
|
SILFunction::iterator Where = std::next(SILFunction::iterator(this));
|
|
SILFunction::iterator First = SILFunction::iterator(New);
|
|
if (Where != First)
|
|
Parent->getBlocks().splice(Where, Parent->getBlocks(), First);
|
|
// Move all of the specified instructions from the original basic block into
|
|
// the new basic block.
|
|
New->getInstList().splice(New->end(), this->getInstList(), I, end());
|
|
return New;
|
|
}
|
|
|
|
/// \brief Splits a basic block into two at the specified instruction and
|
|
/// inserts an unconditional branch from the old basic block to the new basic
|
|
/// block.
|
|
SILBasicBlock *SILBasicBlock::splitBasicBlockAndBranch(iterator I,
|
|
SILLocation BranchLoc) {
|
|
SILBasicBlock *New = splitBasicBlock(I);
|
|
getInstList().insert(getInstList().end(),
|
|
BranchInst::create(BranchLoc, New, *getParent()));
|
|
return New;
|
|
}
|
|
|
|
/// \brief Move the basic block to after the specified basic block in the IR.
|
|
void SILBasicBlock::moveAfter(SILBasicBlock *After) {
|
|
assert(getParent() && getParent() == After->getParent() &&
|
|
"Blocks must be in the same function");
|
|
auto InsertPt = std::next(SILFunction::iterator(After));
|
|
auto &BlkList = getParent()->getBlocks();
|
|
BlkList.splice(InsertPt, BlkList, this);
|
|
}
|