LLVM 19.0.0git
Use.cpp
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1//===-- Use.cpp - Implement the Use class ---------------------------------===//
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
9#include "llvm/IR/Use.h"
10#include "llvm/IR/User.h"
11
12namespace llvm {
13
15 if (Val == RHS.Val)
16 return;
17
18 std::swap(Val, RHS.Val);
19 std::swap(Next, RHS.Next);
20 std::swap(Prev, RHS.Prev);
21
22 *Prev = this;
23 if (Next)
24 Next->Prev = &Next;
25
26 *RHS.Prev = &RHS;
27 if (RHS.Next)
28 RHS.Next->Prev = &RHS.Next;
29}
30
31unsigned Use::getOperandNo() const {
32 return this - getUser()->op_begin();
33}
34
35void Use::zap(Use *Start, const Use *Stop, bool del) {
36 while (Start != Stop)
37 (--Stop)->~Use();
38 if (del)
39 ::operator delete(Start);
40}
41
42} // namespace llvm
This defines the Use class.
Value * RHS
A Use represents the edge between a Value definition and its users.
Definition: Use.h:43
static void zap(Use *Start, const Use *Stop, bool del=false)
Destroys Use operands when the number of operands of a User changes.
Definition: Use.cpp:35
User * getUser() const
Returns the User that contains this Use.
Definition: Use.h:72
unsigned getOperandNo() const
Return the operand # of this use in its User.
Definition: Use.cpp:31
void swap(Use &RHS)
Provide a fast substitute to std::swap<Use> that also works with less standard-compliant compilers.
Definition: Use.cpp:14
op_iterator op_begin()
Definition: User.h:234
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
void swap(llvm::BitVector &LHS, llvm::BitVector &RHS)
Implement std::swap in terms of BitVector swap.
Definition: BitVector.h:860