Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /contrib/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp 
 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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
//===- AMDGPULegalizerInfo.cpp -----------------------------------*- C++ -*-==//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements the targeting of the Machinelegalizer class for
/// AMDGPU.
/// \todo This should be generated by TableGen.
//===----------------------------------------------------------------------===//

#include "AMDGPULegalizerInfo.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Debug.h"

using namespace llvm;

AMDGPULegalizerInfo::AMDGPULegalizerInfo() {
  using namespace TargetOpcode;

  const LLT S1= LLT::scalar(1);
  const LLT V2S16 = LLT::vector(2, 16);
  const LLT S32 = LLT::scalar(32);
  const LLT S64 = LLT::scalar(64);
  const LLT P1 = LLT::pointer(1, 64);
  const LLT P2 = LLT::pointer(2, 64);

  setAction({G_ADD, S32}, Legal);
  setAction({G_AND, S32}, Legal);

  setAction({G_BITCAST, V2S16}, Legal);
  setAction({G_BITCAST, 1, S32}, Legal);

  setAction({G_BITCAST, S32}, Legal);
  setAction({G_BITCAST, 1, V2S16}, Legal);

  // FIXME: i1 operands to intrinsics should always be legal, but other i1
  // values may not be legal.  We need to figure out how to distinguish
  // between these two scenarios.
  setAction({G_CONSTANT, S1}, Legal);
  setAction({G_CONSTANT, S32}, Legal);
  setAction({G_CONSTANT, S64}, Legal);

  setAction({G_FCONSTANT, S32}, Legal);

  setAction({G_FADD, S32}, Legal);

  setAction({G_FMUL, S32}, Legal);

  setAction({G_GEP, P1}, Legal);
  setAction({G_GEP, P2}, Legal);
  setAction({G_GEP, 1, S64}, Legal);

  setAction({G_ICMP, S1}, Legal);
  setAction({G_ICMP, 1, S32}, Legal);

  setAction({G_LOAD, P1}, Legal);
  setAction({G_LOAD, P2}, Legal);
  setAction({G_LOAD, S32}, Legal);
  setAction({G_LOAD, 1, P1}, Legal);
  setAction({G_LOAD, 1, P2}, Legal);

  setAction({G_OR, S32}, Legal);

  setAction({G_SELECT, S32}, Legal);
  setAction({G_SELECT, 1, S1}, Legal);

  setAction({G_SHL, S32}, Legal);

  setAction({G_STORE, S32}, Legal);
  setAction({G_STORE, 1, P1}, Legal);

  // FIXME: When RegBankSelect inserts copies, it will only create new
  // registers with scalar types.  This means we can end up with
  // G_LOAD/G_STORE/G_GEP instruction with scalar types for their pointer
  // operands.  In assert builds, the instruction selector will assert
  // if it sees a generic instruction which isn't legal, so we need to
  // tell it that scalar types are legal for pointer operands
  setAction({G_GEP, S64}, Legal);
  setAction({G_LOAD, 1, S64}, Legal);
  setAction({G_STORE, 1, S64}, Legal);

  computeTables();
}