blob: 90aca0d86456a9519b2bdcb6e9fd71ac25a7800e (
plain)
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
|
//===- SparcV9StackSlots.cpp - Add empty stack slots to functions ---------===//
//
// 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 pass adds 2 empty slots at the top of function stack. These two slots
// are later used during code reoptimization for spilling the register values
// when rewriting branches.
//
//===----------------------------------------------------------------------===//
#include "SparcV9Internals.h"
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "MachineFunctionInfo.h"
using namespace llvm;
namespace {
class StackSlots : public MachineFunctionPass {
const TargetMachine &Target;
public:
StackSlots(const TargetMachine &T) : Target(T) {}
const char *getPassName() const {
return "Stack Slot Insertion for profiling code";
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
}
bool runOnMachineFunction(MachineFunction &MF) {
const Type *PtrInt = PointerType::get(Type::IntTy);
unsigned Size = Target.getTargetData().getTypeSize(PtrInt);
Value *V = Constant::getNullValue(Type::IntTy);
MF.getInfo<SparcV9FunctionInfo>()->allocateLocalVar(V, 2*Size);
return true;
}
};
}
Pass *llvm::createStackSlotsPass(const TargetMachine &Target) {
return new StackSlots(Target);
}
|
