1 //===- AMDGPULegalizerInfo.cpp -----------------------------------*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 /// \file
10 /// This file implements the targeting of the Machinelegalizer class for
11 /// AMDGPU.
12 /// \todo This should be generated by TableGen.
13 //===----------------------------------------------------------------------===//
14 
15 #include "AMDGPULegalizerInfo.h"
16 #include "llvm/CodeGen/ValueTypes.h"
17 #include "llvm/IR/Type.h"
18 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/Target/TargetOpcodes.h"
20 #include "llvm/Support/Debug.h"
21 
22 using namespace llvm;
23 
24 #ifndef LLVM_BUILD_GLOBAL_ISEL
25 #error "You shouldn't build this"
26 #endif
27 
28 AMDGPULegalizerInfo::AMDGPULegalizerInfo() {
29   using namespace TargetOpcode;
30 
31   const LLT S32 = LLT::scalar(32);
32   const LLT S64 = LLT::scalar(64);
33   const LLT P1 = LLT::pointer(1, 64);
34   const LLT P2 = LLT::pointer(2, 64);
35 
36   setAction({G_CONSTANT, S32}, Legal);
37   setAction({G_CONSTANT, S64}, Legal);
38 
39   setAction({G_FCONSTANT, S32}, Legal);
40 
41   setAction({G_GEP, P1}, Legal);
42   setAction({G_GEP, P2}, Legal);
43   setAction({G_GEP, 1, S64}, Legal);
44 
45   setAction({G_LOAD, P1}, Legal);
46   setAction({G_LOAD, P2}, Legal);
47   setAction({G_LOAD, S32}, Legal);
48   setAction({G_LOAD, 1, P1}, Legal);
49   setAction({G_LOAD, 1, P2}, Legal);
50 
51   setAction({G_STORE, S32}, Legal);
52   setAction({G_STORE, 1, P1}, Legal);
53 
54   // FIXME: When RegBankSelect inserts copies, it will only create new
55   // registers with scalar types.  This means we can end up with
56   // G_LOAD/G_STORE/G_GEP instruction with scalar types for their pointer
57   // operands.  In assert builds, the instruction selector will assert
58   // if it sees a generic instruction which isn't legal, so we need to
59   // tell it that scalar types are legal for pointer operands
60   setAction({G_GEP, S64}, Legal);
61   setAction({G_LOAD, 1, S64}, Legal);
62   setAction({G_STORE, 1, S64}, Legal);
63 
64   computeTables();
65 }
66