mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-20 11:29:24 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15938 91177308-0d34-0410-b5e6-96231b3b80d8
805 lines
29 KiB
C++
805 lines
29 KiB
C++
//===-- Instructions.cpp - Implement the LLVM instructions ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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 LLVM instructions...
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/BasicBlock.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/Support/CallSite.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// CallInst Implementation
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//===----------------------------------------------------------------------===//
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void CallInst::init(Value *Func, const std::vector<Value*> &Params)
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{
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Operands.reserve(1+Params.size());
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Operands.push_back(Use(Func, this));
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const FunctionType *FTy =
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cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
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assert((Params.size() == FTy->getNumParams() ||
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(FTy->isVarArg() && Params.size() > FTy->getNumParams())) &&
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"Calling a function with bad signature");
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for (unsigned i = 0; i != Params.size(); i++)
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Operands.push_back(Use(Params[i], this));
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}
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void CallInst::init(Value *Func, Value *Actual1, Value *Actual2)
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{
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Operands.reserve(3);
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Operands.push_back(Use(Func, this));
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const FunctionType *MTy =
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cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
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assert((MTy->getNumParams() == 2 ||
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(MTy->isVarArg() && MTy->getNumParams() == 0)) &&
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"Calling a function with bad signature");
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Operands.push_back(Use(Actual1, this));
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Operands.push_back(Use(Actual2, this));
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}
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void CallInst::init(Value *Func, Value *Actual)
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{
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Operands.reserve(2);
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Operands.push_back(Use(Func, this));
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const FunctionType *MTy =
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cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
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assert((MTy->getNumParams() == 1 ||
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(MTy->isVarArg() && MTy->getNumParams() == 0)) &&
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"Calling a function with bad signature");
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Operands.push_back(Use(Actual, this));
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}
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void CallInst::init(Value *Func)
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{
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Operands.reserve(1);
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Operands.push_back(Use(Func, this));
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const FunctionType *MTy =
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cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
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assert(MTy->getNumParams() == 0 && "Calling a function with bad signature");
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}
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CallInst::CallInst(Value *Func, const std::vector<Value*> &Params,
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const std::string &Name, Instruction *InsertBefore)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertBefore) {
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init(Func, Params);
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}
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CallInst::CallInst(Value *Func, const std::vector<Value*> &Params,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertAtEnd) {
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init(Func, Params);
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}
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CallInst::CallInst(Value *Func, Value *Actual1, Value *Actual2,
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const std::string &Name, Instruction *InsertBefore)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertBefore) {
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init(Func, Actual1, Actual2);
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}
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CallInst::CallInst(Value *Func, Value *Actual1, Value *Actual2,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertAtEnd) {
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init(Func, Actual1, Actual2);
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}
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CallInst::CallInst(Value *Func, Value* Actual, const std::string &Name,
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Instruction *InsertBefore)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertBefore) {
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init(Func, Actual);
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}
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CallInst::CallInst(Value *Func, Value* Actual, const std::string &Name,
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BasicBlock *InsertAtEnd)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertAtEnd) {
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init(Func, Actual);
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}
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CallInst::CallInst(Value *Func, const std::string &Name,
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Instruction *InsertBefore)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertBefore) {
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init(Func);
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}
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CallInst::CallInst(Value *Func, const std::string &Name,
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BasicBlock *InsertAtEnd)
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: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
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->getElementType())->getReturnType(),
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Instruction::Call, Name, InsertAtEnd) {
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init(Func);
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}
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CallInst::CallInst(const CallInst &CI)
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: Instruction(CI.getType(), Instruction::Call) {
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Operands.reserve(CI.Operands.size());
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for (unsigned i = 0; i < CI.Operands.size(); ++i)
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Operands.push_back(Use(CI.Operands[i], this));
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}
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const Function *CallInst::getCalledFunction() const {
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if (const Function *F = dyn_cast<Function>(Operands[0]))
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return F;
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return 0;
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}
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Function *CallInst::getCalledFunction() {
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if (Function *F = dyn_cast<Function>(Operands[0]))
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return F;
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return 0;
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}
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//===----------------------------------------------------------------------===//
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// InvokeInst Implementation
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//===----------------------------------------------------------------------===//
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void InvokeInst::init(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
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const std::vector<Value*> &Params)
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{
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Operands.reserve(3+Params.size());
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Operands.push_back(Use(Fn, this));
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Operands.push_back(Use((Value*)IfNormal, this));
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Operands.push_back(Use((Value*)IfException, this));
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const FunctionType *MTy =
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cast<FunctionType>(cast<PointerType>(Fn->getType())->getElementType());
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assert((Params.size() == MTy->getNumParams()) ||
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(MTy->isVarArg() && Params.size() > MTy->getNumParams()) &&
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"Calling a function with bad signature");
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for (unsigned i = 0; i < Params.size(); i++)
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Operands.push_back(Use(Params[i], this));
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}
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InvokeInst::InvokeInst(Value *Fn, BasicBlock *IfNormal,
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BasicBlock *IfException,
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const std::vector<Value*> &Params,
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const std::string &Name, Instruction *InsertBefore)
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: TerminatorInst(cast<FunctionType>(cast<PointerType>(Fn->getType())
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->getElementType())->getReturnType(),
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Instruction::Invoke, Name, InsertBefore) {
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init(Fn, IfNormal, IfException, Params);
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}
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InvokeInst::InvokeInst(Value *Fn, BasicBlock *IfNormal,
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BasicBlock *IfException,
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const std::vector<Value*> &Params,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: TerminatorInst(cast<FunctionType>(cast<PointerType>(Fn->getType())
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->getElementType())->getReturnType(),
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Instruction::Invoke, Name, InsertAtEnd) {
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init(Fn, IfNormal, IfException, Params);
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}
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InvokeInst::InvokeInst(const InvokeInst &CI)
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: TerminatorInst(CI.getType(), Instruction::Invoke) {
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Operands.reserve(CI.Operands.size());
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for (unsigned i = 0; i < CI.Operands.size(); ++i)
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Operands.push_back(Use(CI.Operands[i], this));
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}
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const Function *InvokeInst::getCalledFunction() const {
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if (const Function *F = dyn_cast<Function>(Operands[0]))
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return F;
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return 0;
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}
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Function *InvokeInst::getCalledFunction() {
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if (Function *F = dyn_cast<Function>(Operands[0]))
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return F;
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return 0;
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}
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// FIXME: Is this supposed to be here?
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Function *CallSite::getCalledFunction() const {
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Value *Callee = getCalledValue();
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if (Function *F = dyn_cast<Function>(Callee))
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return F;
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return 0;
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}
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//===----------------------------------------------------------------------===//
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// ReturnInst Implementation
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//===----------------------------------------------------------------------===//
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// Out-of-line ReturnInst method, put here so the C++ compiler can choose to
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// emit the vtable for the class in this translation unit.
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void ReturnInst::setSuccessor(unsigned idx, BasicBlock *NewSucc) {
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assert(0 && "ReturnInst has no successors!");
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}
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//===----------------------------------------------------------------------===//
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// UnwindInst Implementation
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//===----------------------------------------------------------------------===//
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// Likewise for UnwindInst
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void UnwindInst::setSuccessor(unsigned idx, BasicBlock *NewSucc) {
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assert(0 && "UnwindInst has no successors!");
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}
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//===----------------------------------------------------------------------===//
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// BranchInst Implementation
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//===----------------------------------------------------------------------===//
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void BranchInst::init(BasicBlock *IfTrue)
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{
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assert(IfTrue != 0 && "Branch destination may not be null!");
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Operands.reserve(1);
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Operands.push_back(Use(IfTrue, this));
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}
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void BranchInst::init(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond)
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{
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assert(IfTrue && IfFalse && Cond &&
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"Branch destinations and condition may not be null!");
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assert(Cond && Cond->getType() == Type::BoolTy &&
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"May only branch on boolean predicates!");
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Operands.reserve(3);
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Operands.push_back(Use(IfTrue, this));
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Operands.push_back(Use(IfFalse, this));
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Operands.push_back(Use(Cond, this));
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}
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BranchInst::BranchInst(const BranchInst &BI) : TerminatorInst(Instruction::Br) {
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Operands.reserve(BI.Operands.size());
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Operands.push_back(Use(BI.Operands[0], this));
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if (BI.Operands.size() != 1) {
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assert(BI.Operands.size() == 3 && "BR can have 1 or 3 operands!");
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Operands.push_back(Use(BI.Operands[1], this));
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Operands.push_back(Use(BI.Operands[2], this));
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}
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}
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//===----------------------------------------------------------------------===//
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// AllocationInst Implementation
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//===----------------------------------------------------------------------===//
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void AllocationInst::init(const Type *Ty, Value *ArraySize, unsigned iTy) {
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assert(Ty != Type::VoidTy && "Cannot allocate void elements!");
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// ArraySize defaults to 1.
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if (!ArraySize) ArraySize = ConstantUInt::get(Type::UIntTy, 1);
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Operands.reserve(1);
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assert(ArraySize->getType() == Type::UIntTy &&
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"Malloc/Allocation array size != UIntTy!");
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Operands.push_back(Use(ArraySize, this));
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}
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AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
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const std::string &Name,
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Instruction *InsertBefore)
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: Instruction(PointerType::get(Ty), iTy, Name, InsertBefore) {
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init(Ty, ArraySize, iTy);
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}
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AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
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const std::string &Name,
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BasicBlock *InsertAtEnd)
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: Instruction(PointerType::get(Ty), iTy, Name, InsertAtEnd) {
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init(Ty, ArraySize, iTy);
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}
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bool AllocationInst::isArrayAllocation() const {
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return getOperand(0) != ConstantUInt::get(Type::UIntTy, 1);
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}
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const Type *AllocationInst::getAllocatedType() const {
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return getType()->getElementType();
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}
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AllocaInst::AllocaInst(const AllocaInst &AI)
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: AllocationInst(AI.getType()->getElementType(), (Value*)AI.getOperand(0),
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Instruction::Alloca) {
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}
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MallocInst::MallocInst(const MallocInst &MI)
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: AllocationInst(MI.getType()->getElementType(), (Value*)MI.getOperand(0),
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Instruction::Malloc) {
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}
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//===----------------------------------------------------------------------===//
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// FreeInst Implementation
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//===----------------------------------------------------------------------===//
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void FreeInst::init(Value *Ptr)
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{
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assert(Ptr && isa<PointerType>(Ptr->getType()) && "Can't free nonpointer!");
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Operands.reserve(1);
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Operands.push_back(Use(Ptr, this));
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}
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FreeInst::FreeInst(Value *Ptr, Instruction *InsertBefore)
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: Instruction(Type::VoidTy, Free, "", InsertBefore) {
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init(Ptr);
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}
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FreeInst::FreeInst(Value *Ptr, BasicBlock *InsertAtEnd)
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: Instruction(Type::VoidTy, Free, "", InsertAtEnd) {
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init(Ptr);
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}
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//===----------------------------------------------------------------------===//
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// LoadInst Implementation
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//===----------------------------------------------------------------------===//
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void LoadInst::init(Value *Ptr) {
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assert(Ptr && isa<PointerType>(Ptr->getType()) &&
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"Ptr must have pointer type.");
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Operands.reserve(1);
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Operands.push_back(Use(Ptr, this));
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}
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LoadInst::LoadInst(Value *Ptr, const std::string &Name, Instruction *InsertBef)
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: Instruction(cast<PointerType>(Ptr->getType())->getElementType(),
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Load, Name, InsertBef), Volatile(false) {
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init(Ptr);
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}
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LoadInst::LoadInst(Value *Ptr, const std::string &Name, BasicBlock *InsertAE)
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: Instruction(cast<PointerType>(Ptr->getType())->getElementType(),
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Load, Name, InsertAE), Volatile(false) {
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init(Ptr);
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}
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LoadInst::LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
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Instruction *InsertBef)
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: Instruction(cast<PointerType>(Ptr->getType())->getElementType(),
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Load, Name, InsertBef), Volatile(isVolatile) {
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init(Ptr);
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}
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LoadInst::LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
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BasicBlock *InsertAE)
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: Instruction(cast<PointerType>(Ptr->getType())->getElementType(),
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Load, Name, InsertAE), Volatile(isVolatile) {
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init(Ptr);
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}
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//===----------------------------------------------------------------------===//
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// StoreInst Implementation
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//===----------------------------------------------------------------------===//
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StoreInst::StoreInst(Value *Val, Value *Ptr, Instruction *InsertBefore)
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: Instruction(Type::VoidTy, Store, "", InsertBefore), Volatile(false) {
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init(Val, Ptr);
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}
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StoreInst::StoreInst(Value *Val, Value *Ptr, BasicBlock *InsertAtEnd)
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: Instruction(Type::VoidTy, Store, "", InsertAtEnd), Volatile(false) {
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init(Val, Ptr);
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}
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StoreInst::StoreInst(Value *Val, Value *Ptr, bool isVolatile,
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Instruction *InsertBefore)
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: Instruction(Type::VoidTy, Store, "", InsertBefore), Volatile(isVolatile) {
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init(Val, Ptr);
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}
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StoreInst::StoreInst(Value *Val, Value *Ptr, bool isVolatile,
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BasicBlock *InsertAtEnd)
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: Instruction(Type::VoidTy, Store, "", InsertAtEnd), Volatile(isVolatile) {
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init(Val, Ptr);
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}
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void StoreInst::init(Value *Val, Value *Ptr) {
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assert(isa<PointerType>(Ptr->getType()) && "Ptr must have pointer type!");
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assert(Val->getType() == cast<PointerType>(Ptr->getType())->getElementType()
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&& "Ptr must be a pointer to Val type!");
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Operands.reserve(2);
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Operands.push_back(Use(Val, this));
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Operands.push_back(Use(Ptr, this));
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}
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//===----------------------------------------------------------------------===//
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// GetElementPtrInst Implementation
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//===----------------------------------------------------------------------===//
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// checkType - Simple wrapper function to give a better assertion failure
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// message on bad indexes for a gep instruction.
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//
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static inline const Type *checkType(const Type *Ty) {
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assert(Ty && "Invalid indices for type!");
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return Ty;
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}
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void GetElementPtrInst::init(Value *Ptr, const std::vector<Value*> &Idx)
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{
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Operands.reserve(1+Idx.size());
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Operands.push_back(Use(Ptr, this));
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for (unsigned i = 0, E = Idx.size(); i != E; ++i)
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Operands.push_back(Use(Idx[i], this));
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}
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void GetElementPtrInst::init(Value *Ptr, Value *Idx0, Value *Idx1) {
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Operands.reserve(3);
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Operands.push_back(Use(Ptr, this));
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Operands.push_back(Use(Idx0, this));
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Operands.push_back(Use(Idx1, this));
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}
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GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
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const std::string &Name, Instruction *InBe)
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: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
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Idx, true))),
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GetElementPtr, Name, InBe) {
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init(Ptr, Idx);
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}
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GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
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const std::string &Name, BasicBlock *IAE)
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: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
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Idx, true))),
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GetElementPtr, Name, IAE) {
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init(Ptr, Idx);
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}
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GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
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const std::string &Name, Instruction *InBe)
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: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
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Idx0, Idx1, true))),
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GetElementPtr, Name, InBe) {
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init(Ptr, Idx0, Idx1);
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}
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GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
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const std::string &Name, BasicBlock *IAE)
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: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
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Idx0, Idx1, true))),
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GetElementPtr, Name, IAE) {
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init(Ptr, Idx0, Idx1);
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}
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// getIndexedType - Returns the type of the element that would be loaded with
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// a load instruction with the specified parameters.
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//
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// A null type is returned if the indices are invalid for the specified
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|
// pointer type.
|
|
//
|
|
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
|
|
const std::vector<Value*> &Idx,
|
|
bool AllowCompositeLeaf) {
|
|
if (!isa<PointerType>(Ptr)) return 0; // Type isn't a pointer type!
|
|
|
|
// Handle the special case of the empty set index set...
|
|
if (Idx.empty())
|
|
if (AllowCompositeLeaf ||
|
|
cast<PointerType>(Ptr)->getElementType()->isFirstClassType())
|
|
return cast<PointerType>(Ptr)->getElementType();
|
|
else
|
|
return 0;
|
|
|
|
unsigned CurIdx = 0;
|
|
while (const CompositeType *CT = dyn_cast<CompositeType>(Ptr)) {
|
|
if (Idx.size() == CurIdx) {
|
|
if (AllowCompositeLeaf || CT->isFirstClassType()) return Ptr;
|
|
return 0; // Can't load a whole structure or array!?!?
|
|
}
|
|
|
|
Value *Index = Idx[CurIdx++];
|
|
if (isa<PointerType>(CT) && CurIdx != 1)
|
|
return 0; // Can only index into pointer types at the first index!
|
|
if (!CT->indexValid(Index)) return 0;
|
|
Ptr = CT->getTypeAtIndex(Index);
|
|
|
|
// If the new type forwards to another type, then it is in the middle
|
|
// of being refined to another type (and hence, may have dropped all
|
|
// references to what it was using before). So, use the new forwarded
|
|
// type.
|
|
if (const Type * Ty = Ptr->getForwardedType()) {
|
|
Ptr = Ty;
|
|
}
|
|
}
|
|
return CurIdx == Idx.size() ? Ptr : 0;
|
|
}
|
|
|
|
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
|
|
Value *Idx0, Value *Idx1,
|
|
bool AllowCompositeLeaf) {
|
|
const PointerType *PTy = dyn_cast<PointerType>(Ptr);
|
|
if (!PTy) return 0; // Type isn't a pointer type!
|
|
|
|
// Check the pointer index.
|
|
if (!PTy->indexValid(Idx0)) return 0;
|
|
|
|
const CompositeType *CT = dyn_cast<CompositeType>(PTy->getElementType());
|
|
if (!CT || !CT->indexValid(Idx1)) return 0;
|
|
|
|
const Type *ElTy = CT->getTypeAtIndex(Idx1);
|
|
if (AllowCompositeLeaf || ElTy->isFirstClassType())
|
|
return ElTy;
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// BinaryOperator Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void BinaryOperator::init(BinaryOps iType, Value *S1, Value *S2)
|
|
{
|
|
Operands.reserve(2);
|
|
Operands.push_back(Use(S1, this));
|
|
Operands.push_back(Use(S2, this));
|
|
assert(S1 && S2 && S1->getType() == S2->getType());
|
|
|
|
#ifndef NDEBUG
|
|
switch (iType) {
|
|
case Add: case Sub:
|
|
case Mul: case Div:
|
|
case Rem:
|
|
assert(getType() == S1->getType() &&
|
|
"Arithmetic operation should return same type as operands!");
|
|
assert((getType()->isInteger() ||
|
|
getType()->isFloatingPoint() ||
|
|
isa<PackedType>(getType()) ) &&
|
|
"Tried to create an arithmetic operation on a non-arithmetic type!");
|
|
break;
|
|
case And: case Or:
|
|
case Xor:
|
|
assert(getType() == S1->getType() &&
|
|
"Logical operation should return same type as operands!");
|
|
assert(getType()->isIntegral() &&
|
|
"Tried to create an logical operation on a non-integral type!");
|
|
break;
|
|
case SetLT: case SetGT: case SetLE:
|
|
case SetGE: case SetEQ: case SetNE:
|
|
assert(getType() == Type::BoolTy && "Setcc must return bool!");
|
|
default:
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
|
|
const std::string &Name,
|
|
Instruction *InsertBefore) {
|
|
assert(S1->getType() == S2->getType() &&
|
|
"Cannot create binary operator with two operands of differing type!");
|
|
switch (Op) {
|
|
// Binary comparison operators...
|
|
case SetLT: case SetGT: case SetLE:
|
|
case SetGE: case SetEQ: case SetNE:
|
|
return new SetCondInst(Op, S1, S2, Name, InsertBefore);
|
|
|
|
default:
|
|
return new BinaryOperator(Op, S1, S2, S1->getType(), Name, InsertBefore);
|
|
}
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
|
|
const std::string &Name,
|
|
BasicBlock *InsertAtEnd) {
|
|
BinaryOperator *Res = create(Op, S1, S2, Name);
|
|
InsertAtEnd->getInstList().push_back(Res);
|
|
return Res;
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
|
|
Instruction *InsertBefore) {
|
|
if (!Op->getType()->isFloatingPoint())
|
|
return new BinaryOperator(Instruction::Sub,
|
|
Constant::getNullValue(Op->getType()), Op,
|
|
Op->getType(), Name, InsertBefore);
|
|
else
|
|
return new BinaryOperator(Instruction::Sub,
|
|
ConstantFP::get(Op->getType(), -0.0), Op,
|
|
Op->getType(), Name, InsertBefore);
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
|
|
BasicBlock *InsertAtEnd) {
|
|
if (!Op->getType()->isFloatingPoint())
|
|
return new BinaryOperator(Instruction::Sub,
|
|
Constant::getNullValue(Op->getType()), Op,
|
|
Op->getType(), Name, InsertAtEnd);
|
|
else
|
|
return new BinaryOperator(Instruction::Sub,
|
|
ConstantFP::get(Op->getType(), -0.0), Op,
|
|
Op->getType(), Name, InsertAtEnd);
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
|
|
Instruction *InsertBefore) {
|
|
return new BinaryOperator(Instruction::Xor, Op,
|
|
ConstantIntegral::getAllOnesValue(Op->getType()),
|
|
Op->getType(), Name, InsertBefore);
|
|
}
|
|
|
|
BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
|
|
BasicBlock *InsertAtEnd) {
|
|
return new BinaryOperator(Instruction::Xor, Op,
|
|
ConstantIntegral::getAllOnesValue(Op->getType()),
|
|
Op->getType(), Name, InsertAtEnd);
|
|
}
|
|
|
|
|
|
// isConstantAllOnes - Helper function for several functions below
|
|
static inline bool isConstantAllOnes(const Value *V) {
|
|
return isa<ConstantIntegral>(V) &&cast<ConstantIntegral>(V)->isAllOnesValue();
|
|
}
|
|
|
|
bool BinaryOperator::isNeg(const Value *V) {
|
|
if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
|
|
if (Bop->getOpcode() == Instruction::Sub)
|
|
if (!V->getType()->isFloatingPoint())
|
|
return Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
|
|
else
|
|
return Bop->getOperand(0) == ConstantFP::get(Bop->getType(), -0.0);
|
|
return false;
|
|
}
|
|
|
|
bool BinaryOperator::isNot(const Value *V) {
|
|
if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
|
|
return (Bop->getOpcode() == Instruction::Xor &&
|
|
(isConstantAllOnes(Bop->getOperand(1)) ||
|
|
isConstantAllOnes(Bop->getOperand(0))));
|
|
return false;
|
|
}
|
|
|
|
Value *BinaryOperator::getNegArgument(BinaryOperator *Bop) {
|
|
assert(isNeg(Bop) && "getNegArgument from non-'neg' instruction!");
|
|
return Bop->getOperand(1);
|
|
}
|
|
|
|
const Value *BinaryOperator::getNegArgument(const BinaryOperator *Bop) {
|
|
return getNegArgument((BinaryOperator*)Bop);
|
|
}
|
|
|
|
Value *BinaryOperator::getNotArgument(BinaryOperator *Bop) {
|
|
assert(isNot(Bop) && "getNotArgument on non-'not' instruction!");
|
|
Value *Op0 = Bop->getOperand(0);
|
|
Value *Op1 = Bop->getOperand(1);
|
|
if (isConstantAllOnes(Op0)) return Op1;
|
|
|
|
assert(isConstantAllOnes(Op1));
|
|
return Op0;
|
|
}
|
|
|
|
const Value *BinaryOperator::getNotArgument(const BinaryOperator *Bop) {
|
|
return getNotArgument((BinaryOperator*)Bop);
|
|
}
|
|
|
|
|
|
// swapOperands - Exchange the two operands to this instruction. This
|
|
// instruction is safe to use on any binary instruction and does not
|
|
// modify the semantics of the instruction. If the instruction is
|
|
// order dependent (SetLT f.e.) the opcode is changed.
|
|
//
|
|
bool BinaryOperator::swapOperands() {
|
|
if (isCommutative())
|
|
; // If the instruction is commutative, it is safe to swap the operands
|
|
else if (SetCondInst *SCI = dyn_cast<SetCondInst>(this))
|
|
/// FIXME: SetCC instructions shouldn't all have different opcodes.
|
|
setOpcode(SCI->getSwappedCondition());
|
|
else
|
|
return true; // Can't commute operands
|
|
|
|
std::swap(Operands[0], Operands[1]);
|
|
return false;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SetCondInst Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
SetCondInst::SetCondInst(BinaryOps Opcode, Value *S1, Value *S2,
|
|
const std::string &Name, Instruction *InsertBefore)
|
|
: BinaryOperator(Opcode, S1, S2, Type::BoolTy, Name, InsertBefore) {
|
|
|
|
// Make sure it's a valid type... getInverseCondition will assert out if not.
|
|
assert(getInverseCondition(Opcode));
|
|
}
|
|
|
|
SetCondInst::SetCondInst(BinaryOps Opcode, Value *S1, Value *S2,
|
|
const std::string &Name, BasicBlock *InsertAtEnd)
|
|
: BinaryOperator(Opcode, S1, S2, Type::BoolTy, Name, InsertAtEnd) {
|
|
|
|
// Make sure it's a valid type... getInverseCondition will assert out if not.
|
|
assert(getInverseCondition(Opcode));
|
|
}
|
|
|
|
// getInverseCondition - Return the inverse of the current condition opcode.
|
|
// For example seteq -> setne, setgt -> setle, setlt -> setge, etc...
|
|
//
|
|
Instruction::BinaryOps SetCondInst::getInverseCondition(BinaryOps Opcode) {
|
|
switch (Opcode) {
|
|
default:
|
|
assert(0 && "Unknown setcc opcode!");
|
|
case SetEQ: return SetNE;
|
|
case SetNE: return SetEQ;
|
|
case SetGT: return SetLE;
|
|
case SetLT: return SetGE;
|
|
case SetGE: return SetLT;
|
|
case SetLE: return SetGT;
|
|
}
|
|
}
|
|
|
|
// getSwappedCondition - Return the condition opcode that would be the result
|
|
// of exchanging the two operands of the setcc instruction without changing
|
|
// the result produced. Thus, seteq->seteq, setle->setge, setlt->setgt, etc.
|
|
//
|
|
Instruction::BinaryOps SetCondInst::getSwappedCondition(BinaryOps Opcode) {
|
|
switch (Opcode) {
|
|
default: assert(0 && "Unknown setcc instruction!");
|
|
case SetEQ: case SetNE: return Opcode;
|
|
case SetGT: return SetLT;
|
|
case SetLT: return SetGT;
|
|
case SetGE: return SetLE;
|
|
case SetLE: return SetGE;
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SwitchInst Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void SwitchInst::init(Value *Value, BasicBlock *Default)
|
|
{
|
|
assert(Value && Default);
|
|
Operands.push_back(Use(Value, this));
|
|
Operands.push_back(Use(Default, this));
|
|
}
|
|
|
|
SwitchInst::SwitchInst(const SwitchInst &SI)
|
|
: TerminatorInst(Instruction::Switch) {
|
|
Operands.reserve(SI.Operands.size());
|
|
|
|
for (unsigned i = 0, E = SI.Operands.size(); i != E; i+=2) {
|
|
Operands.push_back(Use(SI.Operands[i], this));
|
|
Operands.push_back(Use(SI.Operands[i+1], this));
|
|
}
|
|
}
|
|
|
|
/// addCase - Add an entry to the switch instruction...
|
|
///
|
|
void SwitchInst::addCase(Constant *OnVal, BasicBlock *Dest) {
|
|
Operands.push_back(Use((Value*)OnVal, this));
|
|
Operands.push_back(Use((Value*)Dest, this));
|
|
}
|
|
|
|
/// removeCase - This method removes the specified successor from the switch
|
|
/// instruction. Note that this cannot be used to remove the default
|
|
/// destination (successor #0).
|
|
///
|
|
void SwitchInst::removeCase(unsigned idx) {
|
|
assert(idx != 0 && "Cannot remove the default case!");
|
|
assert(idx*2 < Operands.size() && "Successor index out of range!!!");
|
|
Operands.erase(Operands.begin()+idx*2, Operands.begin()+(idx+1)*2);
|
|
}
|