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Add methods to MipsFunctionInfo for initializing and accessing the stack frame

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object for the global base register.

This is the first of a series of patches which implements long branch expansion
for MIPS.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158427 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-06-14 01:15:36 +00:00
parent 158413930f
commit a76220a40c
1 changed files with 23 additions and 1 deletions
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24
lib/Target/Mips/MipsMachineFunction.h
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@ -14,8 +14,11 @@
#ifndef MIPS_MACHINE_FUNCTION_INFO_H
#define MIPS_MACHINE_FUNCTION_INFO_H
#include "MipsSubtarget.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"
#include <utility>
namespace llvm {
@ -45,6 +48,7 @@ class MipsFunctionInfo : public MachineFunctionInfo {
// OutArgFIRange: Range of indices of all frame objects created during call to
// LowerCall except for the frame object for restoring $gp.
std::pair<int, int> InArgFIRange, OutArgFIRange;
int GlobalRegFI;
mutable int DynAllocFI; // Frame index of dynamically allocated stack area.
unsigned MaxCallFrameSize;
@ -54,7 +58,7 @@ public:
MipsFunctionInfo(MachineFunction& MF)
: MF(MF), SRetReturnReg(0), GlobalBaseReg(0),
VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
OutArgFIRange(std::make_pair(-1, 0)), DynAllocFI(0),
OutArgFIRange(std::make_pair(-1, 0)), GlobalRegFI(0), DynAllocFI(0),
MaxCallFrameSize(0), EmitNOAT(false)
{}
@ -73,6 +77,24 @@ public:
OutArgFIRange.second = LastFI;
}
bool isGlobalRegFI(int FI) const {
return GlobalRegFI && (FI == GlobalRegFI);
}
int getGlobalRegFI() const {
return GlobalRegFI;
}
int initGlobalRegFI() {
const TargetMachine &TM = MF.getTarget();
unsigned RegSize = TM.getSubtarget<MipsSubtarget>().isABI_N64() ? 8 : 4;
int64_t StackAlignment = TM.getFrameLowering()->getStackAlignment();
uint64_t Offset = RoundUpToAlignment(MaxCallFrameSize, StackAlignment);
GlobalRegFI = MF.getFrameInfo()->CreateFixedObject(RegSize, Offset, true);
return GlobalRegFI;
}
// The first call to this function creates a frame object for dynamically
// allocated stack area.
int getDynAllocFI() const {