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