1// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | FileCheck %s 2 3// Check that if decoding of an instruction fails and the instruction does not 4// have a complete decoder method that can determine if the bitpattern is valid 5// or not then the decoder tries to find a more general instruction that 6// matches the bitpattern too. 7 8include "llvm/Target/Target.td" 9 10def archInstrInfo : InstrInfo { } 11 12def arch : Target { 13 let InstructionSet = archInstrInfo; 14} 15 16class TestInstruction : Instruction { 17 let Size = 1; 18 let OutOperandList = (outs); 19 let InOperandList = (ins); 20 field bits<8> Inst; 21 field bits<8> SoftFail = 0; 22} 23 24def InstA : TestInstruction { 25 let Inst = {0,0,0,0,?,?,?,?}; 26 let AsmString = "InstA"; 27} 28 29def InstB : TestInstruction { 30 let Inst = {0,0,0,0,0,0,?,?}; 31 let AsmString = "InstB"; 32 let DecoderMethod = "DecodeInstB"; 33 let hasCompleteDecoder = 0; 34} 35 36// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ... 37// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValue, 0, 18, 0, 0, // Skip to: 26 38// CHECK-NEXT: /* 8 */ MCD::OPC_CheckField, 2, 2, 0, 7, 0, 0, // Skip to: 22 39// CHECK-NEXT: /* 15 */ MCD::OPC_TryDecode, {{[0-9]+}}, 1, 0, 0, 0, 0, // Opcode: InstB, skip to: 22 40// CHECK-NEXT: /* 22 */ MCD::OPC_Decode, {{[0-9]+}}, 1, 1, // Opcode: InstA 41// CHECK-NEXT: /* 26 */ MCD::OPC_Fail, 42 43// CHECK: if (DecodeInstB(MI, insn, Address, Decoder) == MCDisassembler::Fail) { DecodeComplete = false; return MCDisassembler::Fail; } 44