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/DerivedTypes.h" 18 #include "llvm/IR/Type.h" 19 #include "llvm/Support/Debug.h" 20 #include "llvm/Target/TargetOpcodes.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 S1= LLT::scalar(1); 32 const LLT S32 = LLT::scalar(32); 33 const LLT S64 = LLT::scalar(64); 34 const LLT P1 = LLT::pointer(1, 64); 35 const LLT P2 = LLT::pointer(2, 64); 36 37 // FIXME: i1 operands to intrinsics should always be legal, but other i1 38 // values may not be legal. We need to figure out how to distinguish 39 // between these two scenarios. 40 setAction({G_CONSTANT, S1}, Legal); 41 setAction({G_CONSTANT, S32}, Legal); 42 setAction({G_CONSTANT, S64}, Legal); 43 44 setAction({G_FCONSTANT, S32}, Legal); 45 46 setAction({G_GEP, P1}, Legal); 47 setAction({G_GEP, P2}, Legal); 48 setAction({G_GEP, 1, S64}, Legal); 49 50 setAction({G_ICMP, S1}, Legal); 51 setAction({G_ICMP, 1, S32}, Legal); 52 53 setAction({G_LOAD, P1}, Legal); 54 setAction({G_LOAD, P2}, Legal); 55 setAction({G_LOAD, S32}, Legal); 56 setAction({G_LOAD, 1, P1}, Legal); 57 setAction({G_LOAD, 1, P2}, Legal); 58 59 setAction({G_SELECT, S32}, Legal); 60 setAction({G_SELECT, 1, S1}, Legal); 61 62 setAction({G_STORE, S32}, Legal); 63 setAction({G_STORE, 1, P1}, Legal); 64 65 // FIXME: When RegBankSelect inserts copies, it will only create new 66 // registers with scalar types. This means we can end up with 67 // G_LOAD/G_STORE/G_GEP instruction with scalar types for their pointer 68 // operands. In assert builds, the instruction selector will assert 69 // if it sees a generic instruction which isn't legal, so we need to 70 // tell it that scalar types are legal for pointer operands 71 setAction({G_GEP, S64}, Legal); 72 setAction({G_LOAD, 1, S64}, Legal); 73 setAction({G_STORE, 1, S64}, Legal); 74 75 computeTables(); 76 } 77