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//===-- VESubtarget.cpp - VE Subtarget Information ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the VE specific subclass of TargetSubtargetInfo.
//
//===----------------------------------------------------------------------===//
#include "VESubtarget.h"
#include "VE.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
#define DEBUG_TYPE "ve-subtarget"
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "VEGenSubtargetInfo.inc"
void VESubtarget::anchor() {}
VESubtarget &VESubtarget::initializeSubtargetDependencies(StringRef CPU,
StringRef FS) {
// Determine default and user specified characteristics
std::string CPUName = std::string(CPU);
if (CPUName.empty())
CPUName = "ve";
// Parse features string.
ParseSubtargetFeatures(CPUName, FS);
return *this;
}
VESubtarget::VESubtarget(const Triple &TT, const std::string &CPU,
const std::string &FS, const TargetMachine &TM)
: VEGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT),
InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
FrameLowering(*this) {}
int VESubtarget::getAdjustedFrameSize(int frameSize) const {
// VE stack frame:
//
// +----------------------------------------+
// | Locals and temporaries |
// +----------------------------------------+
// | Parameter area for callee |
// 176(fp) | |
// +----------------------------------------+
// | Register save area (RSA) for callee |
// | |
// 16(fp) | 20 * 8 bytes |
// +----------------------------------------+
// 8(fp) | Return address |
// +----------------------------------------+
// 0(fp) | Frame pointer of caller |
// --------+----------------------------------------+--------
// | Locals and temporaries for callee |
// +----------------------------------------+
// | Parameter area for callee of callee |
// +----------------------------------------+
// 16(sp) | RSA for callee of callee |
// +----------------------------------------+
// 8(sp) | Return address |
// +----------------------------------------+
// 0(sp) | Frame pointer of callee |
// +----------------------------------------+
// RSA frame:
// +----------------------------------------------+
// 168(fp) | %s33 |
// +----------------------------------------------+
// | %s19...%s32 |
// +----------------------------------------------+
// 48(fp) | %s18 |
// +----------------------------------------------+
// 40(fp) | Linkage area register (%s17) |
// +----------------------------------------------+
// 32(fp) | Procedure linkage table register (%plt=%s16) |
// +----------------------------------------------+
// 24(fp) | Global offset table register (%got=%s15) |
// +----------------------------------------------+
// 16(fp) | Thread pointer register (%tp=%s14) |
// +----------------------------------------------+
frameSize += 176; // for RSA, RA, and FP
frameSize = alignTo(frameSize, 16); // requires 16 bytes alignment
return frameSize;
}
bool VESubtarget::enableMachineScheduler() const { return true; }
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