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4c1f3c24db
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. llvm-svn: 171366
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
//===-- User.cpp - Implement the User 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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#include "llvm/IR/User.h"
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#include "llvm/IR/Constant.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/IR/Operator.h"
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// User Class
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//===----------------------------------------------------------------------===//
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void User::anchor() {}
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// replaceUsesOfWith - Replaces all references to the "From" definition with
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// references to the "To" definition.
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//
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void User::replaceUsesOfWith(Value *From, Value *To) {
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if (From == To) return; // Duh what?
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assert((!isa<Constant>(this) || isa<GlobalValue>(this)) &&
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"Cannot call User::replaceUsesOfWith on a constant!");
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for (unsigned i = 0, E = getNumOperands(); i != E; ++i)
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if (getOperand(i) == From) { // Is This operand is pointing to oldval?
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// The side effects of this setOperand call include linking to
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// "To", adding "this" to the uses list of To, and
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// most importantly, removing "this" from the use list of "From".
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setOperand(i, To); // Fix it now...
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}
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}
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//===----------------------------------------------------------------------===//
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// User allocHungoffUses Implementation
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//===----------------------------------------------------------------------===//
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Use *User::allocHungoffUses(unsigned N) const {
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// Allocate the array of Uses, followed by a pointer (with bottom bit set) to
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// the User.
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size_t size = N * sizeof(Use) + sizeof(Use::UserRef);
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Use *Begin = static_cast<Use*>(::operator new(size));
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Use *End = Begin + N;
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(void) new(End) Use::UserRef(const_cast<User*>(this), 1);
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return Use::initTags(Begin, End);
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}
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//===----------------------------------------------------------------------===//
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// User operator new Implementations
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//===----------------------------------------------------------------------===//
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void *User::operator new(size_t s, unsigned Us) {
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void *Storage = ::operator new(s + sizeof(Use) * Us);
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Use *Start = static_cast<Use*>(Storage);
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Use *End = Start + Us;
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User *Obj = reinterpret_cast<User*>(End);
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Obj->OperandList = Start;
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Obj->NumOperands = Us;
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Use::initTags(Start, End);
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return Obj;
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}
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//===----------------------------------------------------------------------===//
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// User operator delete Implementation
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//===----------------------------------------------------------------------===//
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void User::operator delete(void *Usr) {
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User *Start = static_cast<User*>(Usr);
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Use *Storage = static_cast<Use*>(Usr) - Start->NumOperands;
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// If there were hung-off uses, they will have been freed already and
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// NumOperands reset to 0, so here we just free the User itself.
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::operator delete(Storage);
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}
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//===----------------------------------------------------------------------===//
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// Operator Class
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//===----------------------------------------------------------------------===//
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Operator::~Operator() {
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llvm_unreachable("should never destroy an Operator");
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}
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} // End llvm namespace
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