1//===-- VESubtarget.cpp - VE Subtarget Information ------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the VE specific subclass of TargetSubtargetInfo.
10//
11//===----------------------------------------------------------------------===//
12
13#include "VESubtarget.h"
14#include "VE.h"
15#include "llvm/Support/MathExtras.h"
16#include "llvm/Support/TargetRegistry.h"
17
18using namespace llvm;
19
20#define DEBUG_TYPE "ve-subtarget"
21
22#define GET_SUBTARGETINFO_TARGET_DESC
23#define GET_SUBTARGETINFO_CTOR
24#include "VEGenSubtargetInfo.inc"
25
26void VESubtarget::anchor() {}
27
28VESubtarget &VESubtarget::initializeSubtargetDependencies(StringRef CPU,
29                                                          StringRef FS) {
30  // Determine default and user specified characteristics
31  std::string CPUName = CPU;
32  if (CPUName.empty())
33    CPUName = "ve";
34
35  // Parse features string.
36  ParseSubtargetFeatures(CPUName, FS);
37
38  return *this;
39}
40
41VESubtarget::VESubtarget(const Triple &TT, const std::string &CPU,
42                         const std::string &FS, const TargetMachine &TM)
43    : VEGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT),
44      InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
45      FrameLowering(*this) {}
46
47int VESubtarget::getAdjustedFrameSize(int frameSize) const {
48
49  // VE stack frame:
50  //
51  //         +----------------------------------------+
52  //         | Locals and temporaries                 |
53  //         +----------------------------------------+
54  //         | Parameter area for callee              |
55  // 176(fp) |                                        |
56  //         +----------------------------------------+
57  //         | Register save area (RSA) for callee    |
58  //         |                                        |
59  //  16(fp) |                         20 * 8 bytes   |
60  //         +----------------------------------------+
61  //   8(fp) | Return address                         |
62  //         +----------------------------------------+
63  //   0(fp) | Frame pointer of caller                |
64  // --------+----------------------------------------+--------
65  //         | Locals and temporaries for callee      |
66  //         +----------------------------------------+
67  //         | Parameter area for callee of callee    |
68  //         +----------------------------------------+
69  //  16(sp) | RSA for callee of callee               |
70  //         +----------------------------------------+
71  //   8(sp) | Return address                         |
72  //         +----------------------------------------+
73  //   0(sp) | Frame pointer of callee                |
74  //         +----------------------------------------+
75
76  // RSA frame:
77  //         +----------------------------------------------+
78  // 168(fp) | %s33                                         |
79  //         +----------------------------------------------+
80  //         | %s19...%s32                                  |
81  //         +----------------------------------------------+
82  //  48(fp) | %s18                                         |
83  //         +----------------------------------------------+
84  //  40(fp) | Linkage area register (%s17)                 |
85  //         +----------------------------------------------+
86  //  32(fp) | Procedure linkage table register (%plt=%s16) |
87  //         +----------------------------------------------+
88  //  24(fp) | Global offset table register (%got=%s15)     |
89  //         +----------------------------------------------+
90  //  16(fp) | Thread pointer register (%tp=%s14)           |
91  //         +----------------------------------------------+
92
93  frameSize += 176;                   // for RSA, RA, and FP
94  frameSize = alignTo(frameSize, 16); // requires 16 bytes alignment
95
96  return frameSize;
97}
98
99bool VESubtarget::enableMachineScheduler() const { return true; }
100