1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
//===-- iSwitch.cpp - Implement the Switch instruction --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Switch instruction...
//
//===----------------------------------------------------------------------===//
#include "llvm/iTerminators.h"
#include "llvm/BasicBlock.h"
using namespace llvm;
SwitchInst::SwitchInst(Value *V, BasicBlock *DefaultDest,
Instruction *InsertBefore)
: TerminatorInst(Instruction::Switch, InsertBefore) {
assert(V && DefaultDest);
Operands.push_back(Use(V, this));
Operands.push_back(Use(DefaultDest, this));
}
SwitchInst::SwitchInst(Value *V, BasicBlock *DefaultDest,
BasicBlock *InsertAtEnd)
: TerminatorInst(Instruction::Switch, InsertAtEnd) {
assert(V && DefaultDest);
Operands.push_back(Use(V, this));
Operands.push_back(Use(DefaultDest, 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);
}
|
