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Implement support for inserting an instruction into a basic block right when it

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is created.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3651 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-09-10 15:36:11 +00:00
parent 74493a4c6e
commit 3a8b0f00e6
6 changed files with 79 additions and 69 deletions
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27
include/llvm/iTerminators.h
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@ -1,9 +1,8 @@
//===-- llvm/iTerminators.h - Termintator instruction nodes ------*- C++ -*--=//
//===-- llvm/iTerminators.h - Termintator instruction nodes -----*- C++ -*-===//
//
// This file contains the declarations for all the subclasses of the
// Instruction class, which is itself defined in the Instruction.h file. In
// between these definitions and the Instruction class are classes that expose
// the SSA properties of each instruction, and that form the SSA graph.
// This file contains the declarations for all the subclasses of the Instruction
// class which represent "terminator" instructions. Terminator instructions are
// the only instructions allowed and required to terminate a BasicBlock.
//
//===----------------------------------------------------------------------===//
@ -12,11 +11,6 @@
#include "llvm/InstrTypes.h"
//===----------------------------------------------------------------------===//
// Classes to represent Basic Block "Terminator" instructions
//===----------------------------------------------------------------------===//
//===---------------------------------------------------------------------------
// ReturnInst - Return a value (possibly void), from a method. Execution does
// not continue in this method any longer.
@ -30,7 +24,8 @@ class ReturnInst : public TerminatorInst {
}
}
public:
ReturnInst(Value *RetVal = 0) : TerminatorInst(Instruction::Ret) {
ReturnInst(Value *RetVal = 0, Instruction *InsertBefore = 0)
: TerminatorInst(Instruction::Ret, InsertBefore) {
if (RetVal) {
Operands.reserve(1);
Operands.push_back(Use(RetVal, this));
@ -74,7 +69,8 @@ class BranchInst : public TerminatorInst {
BranchInst(const BranchInst &BI);
public:
// If cond = null, then is an unconditional br...
BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse = 0, Value *cond = 0);
BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse = 0, Value *cond = 0,
Instruction *InsertBefore = 0);
virtual Instruction *clone() const { return new BranchInst(*this); }
@ -84,7 +80,7 @@ public:
inline const Value *getCondition() const {
return isUnconditional() ? 0 : Operands[2].get();
}
inline Value *getCondition() {
Value *getCondition() {
return isUnconditional() ? 0 : Operands[2].get();
}
@ -133,7 +129,7 @@ class SwitchInst : public TerminatorInst {
// Operand[2n+1] = BasicBlock to go to on match
SwitchInst(const SwitchInst &RI);
public:
SwitchInst(Value *Value, BasicBlock *Default);
SwitchInst(Value *Value, BasicBlock *Default, Instruction *InsertBefore = 0);
virtual Instruction *clone() const { return new SwitchInst(*this); }
@ -194,7 +190,8 @@ class InvokeInst : public TerminatorInst {
InvokeInst(const InvokeInst &BI);
public:
InvokeInst(Value *Meth, BasicBlock *IfNormal, BasicBlock *IfException,
const std::vector<Value*> &Params, const std::string &Name = "");
const std::vector<Value*> &Params, const std::string &Name = "",
Instruction *InsertBefore = 0);
virtual Instruction *clone() const { return new InvokeInst(*this); }